All about dinosaurs, fossils and prehistoric animals by Everything Dinosaur team members.

Pictures of fossils, fossil hunting trips, fossil sites and photographs relating to fossil hunting and fossil finds.

19 02, 2024

New Study Demonstrates Tridentinosaurus Fossil is a Fake

By |2024-02-19T12:35:47+00:00February 19th, 2024|Dinosaur and Prehistoric Animal News Stories, Dinosaur Fans, Main Page, Palaeontological articles, Photos/Pictures of Fossils|0 Comments

A fossil once thought to represent an Early Permian reptile with soft tissue preservation has been proven to be a fake. The fossilised remains of a lizard-like reptile named Tridentinosaurus antiquus were found in the 1930s. It was thought to be an extremely rare fossil with carbonised skin impressions surrounding the articulated fossil bones. However, a detailed analysis of the specimen has revealed that these “soft tissues” were painted on.

Images of the Tridentinosaurus antiquus fossil specimen.
Tridentinosaurus antiquus fossil specimen (A) showing sampling locations with (B) surface map of the fossil. The specimen photographed under UV light (C). Analysis revealed that the purported fossilised soft tissues of T. antiquus were forged. Picture credit: Rossi et al.

Tridentinosaurus antiquus Specimen is a Forgery

Discovered in the Italian Alps near the “Stramaiolo” (Redebus) locality in the Pinè Valley, the fossil was thought to represent one of the oldest, nearly complete and articulated reptiles known to science. Writing in the journal “Palaeontology”, the research team used a variety of techniques to analyse the surface structure of the twenty-centimetre-long fossil.

The results demonstrated that the purported fossilised soft tissues of Tridentinosaurus antiquus are not original. The fossil is a forgery. The paint applied within the prepared area around the poorly preserved bones and osteoderms, produced the shape of a slender lizard-like animal making the specimen look authentic.

Carbonised plant remains are known from the same locality. The forged body outline and soft tissues misled scientists who thought that the soft tissue had been carbonised just like plant fossils from this region. Under ultraviolet light the plant fossils did not fluoresce, however, the reptile fossil outline became fluorescent. Normally, carbonised fossil material does not fluoresce when exposed to UV light. However, artificial pigments, vanishes and glues are likely to become fluorescent.

The Validity of the Taxon is Doubted

Tridentinosaurus antiquus represents one of the oldest fossil reptiles known to science. The taphonomy and the appearance of this fossil had puzzled palaeontologists for decades. It was thought to represent a primitive diapsid reptile, a basal member of the Archosauromorpha that gave rise to the dinosaurs, crocodiles and birds.

The researchers were able to confirm that many of the features of this specimen had been forged. This discovery raises questions about the validity of this enigmatic taxon.

Despite the manipulation of the specimen, it may still have scientific value. The poorly preserved long bones of the hindlimbs seem to be genuine and resemble the quality of preservation of exposed bones of Late Triassic pterosauromorphs such as Scleromochlus. Perhaps, this fossil is an example of the lineage of basal archosaurs that gave rise to the flying reptiles (Pterosauria).

Close-up views of the Tridentinosaurus antiquus fossil specimen.
Close-up view of the shoulder area (D) and an enlargement of the pelvic girdle (E). Although much of the fossil has been altered some bones seem to be genuine and resemble the quality of preservation of exposed bones of Late Triassic pterosauromorphs such as Scleromochlus. Scale bar in (D) equals 5 mm. The scale bar (E) equals 3 mm. Picture credit: Rossi et al.

Why Fake a Fossil?

Fossils are sometimes manipulated to make them more valuable to collectors. If the fossil can be seen to be more complete or rare it can greatly enhance their monetary value.

Everything Dinosaur acknowledges the assistance of a media release from the Museum of Nature South Tyrol (Naturmuseum Südtirol) in the compilation of this article.

The scientific paper: “Forged soft tissues revealed in the oldest fossil reptile from the early Permian of the Alps” by Valentina Rossi, Massimo Bernardi, Mariagabriella Fornasiero, Fabrizio Nestola, Richard Unitt, Stefano Castelli, Evelyn Kustatscher published in Palaeontology.

Visit the Everything Dinosaur website (there are no fakes here): Everything Dinosaur.

13 02, 2024

Studying Stunning Sea Scorpion Fossils

By |2024-03-03T12:39:31+00:00February 13th, 2024|Adobe CS5, Educational Activities, Main Page, Palaeontological articles, Photos/Pictures of Fossils|0 Comments

Eurypterids (Eurypterida) are often referred to as sea scorpions. Like scorpions these extinct invertebrates are members of the Arthropoda Phylum. They are distantly related to extant scorpions and spiders. It is thought that the first eurypterids evolved during the Ordovician. They thrived in the Silurian and Devonian. Giant forms evolved, animals like Jaekeklopterus, Acutiramus and Pterygotus. However, the number of taxa was severely depleted during the end-Devonian extinction event and although they survived for at least another 100 million years or so, during the Carboniferous and Permian they only made up a very small percentage of the taxa described from fossil deposits.

Two Pterygotus sea scorpion fossils.
Examples of the Pterygotioidea eurypterid lineage. Note the flattened, blade-like telson that probably helped with propulsion or acted like a rudder helping to steer the animal through the water. The fossils represent Pterygotus anglicus. Picture credit: Everything Dinosaur.

Picture credit: Everything Dinosaur

The picture (above) shows two Pterygotus anglicus fossil specimens on display at the London Natural History Museum. These Early Devonian fossils come from Arbroath (Scotland).

The Shape of the Telson

Note the broad, flattened, blade-like final segment of the animal. This is the telson and in the Pterygotioidea lineage (as well as in some other Superfamilies), the telson evolved into an organ to help with propulsion and steering. In other eurypterids, the telson is shaped very differently. For example, in the sea scorpion fossil (below), the telson is long and pointed.

Examining sea scorpion fossils
A fossil of a sea scorpion (eurypterid) on display at the Manchester Museum. Note the pointed end segment (telson). Probably an example of the Silurian eurypterid Eurypterus. Picture credit: Everything Dinosaur.

The Giant Claws (Chelicerae) Seen in Some Sea Scorpion Fossils

The segmented body of eurypterids consisted of the frontal prosoma (head) and the posterior opisthosoma (abdomen). The prosoma contained the mouth and six pairs of appendages which are usually referred to as appendage pairs I to VI using Roman numerals. The segments that make up the opisthosoma are usually numbered using Arabic numerals 1, 2, 3 etc. The opisthosoma comprised twelve segments in total plus the telson.

The first pair of appendages, the only pair located in front of the mouth opening, is called the chelicerae (pronounced kel-iss-ser-ray). This pair of appendages evolved into a myriad of forms in the Chelicerata (pronounced kel-iss-ser-rat-ah), the Subphylum containing the eurypterids, spiders, mites, scorpions and horseshoe crabs. This pair of appendages form the fangs seen in spiders and form the feeding limbs of horseshoe crabs.

An Atlantic horseshoe crab viewed ventrally.
An Atlantic horseshoe crab in ventral view with the six pairs of appendages and the telson labelled. The first pair of appendages (chelicerae) help to push food into the mouth opening. Picture credit: Everything Dinosaur.

Picture credit: Everything Dinosaur

Powerful Pincers Adapted for Grasping Prey

Some of these appendages, such as the chelicerae of giant pterygotids evolved into powerful pincers armed with strong claws analogous to those seen in crabs and lobsters. These chelicerae seem to be adapted for grasping and subduing prey. This suggests that many eurypterids were predatory.

A sea scorpion claw
A stunning fossil of a sea scorpion (eurypterid) claw housed at the National Museum Cardiff (Wales) photographed in 2019 when team members at Everything Dinosaur visited. The image shows a single chelicera ramus. Picture credit: Everything Dinosaur.

Note

A single appendage is referred to as a chelicera (pronounced kel-iss-ser-rah). Whereas a pair or more are referred to as chelicerae (kel-iss-ser-ray).

A spokesperson from Everything Dinosaur commented that these arthropods were remarkable animals.

“Some 250 different taxa have been described and some of these sea scorpions show adaptations that indicate they may have been partially terrestrial. Venturing out onto land is supported by trace fossils potentially preserving tracks of eurypterids walking across mud close to bodies of water.”

Visit the Everything Dinosaur website: Everything Dinosaur’s Website.

10 02, 2024

Getting to Grips with the Enigmatic Caenagnathidae

By |2024-02-07T10:13:48+00:00February 10th, 2024|Dinosaur and Prehistoric Animal Drawings, Dinosaur Fans, Main Page, Palaeontological articles, Photos of Everything Dinosaur Products, Photos/Pictures of Fossils|0 Comments

With the publication of the scientific paper announcing the discovery of Eoneophron infernalis, we at Everything Dinosaur thought we would take a closer look at the Caenagnathidae. The Caenagnathidae family (pronounced seen-nag-nay-thid-ay), are part of the Oviraptorosauria clade of maniraptoran theropod dinosaurs. They are closely related to the oviraptorids (Oviraptoridae family).

Anzu wyliei scale drawing.
A scale drawing of a dinosaur (Anzu wyliei). This dinosaur is a member of the Caenagnathidae family, and its fossils come from the Hell Creek Formation (Maastrichtian faunal stage of the Late Cretaceous). Picture credit: Everything Dinosaur.

Picture credit: Everything Dinosaur

To read the recent article about Eoneophron infernalis: University Student Discovers New Dinosaur Species.

Defining the Maniraptora and the Oviraptorosauria

The Maniraptora clade consists of coelurosaurian dinosaurs and is defined as including the birds and the non-avian dinosaurs more closely related to them than to Ornithomimus velox. As well as containing the Oviraptorosauria, this clade also includes several other groups such as the dromaeosaurids, the Troodontidae family and the therizinosaurs.

The Oviraptorosauria clade* is comprised of the Caudipteridae family and two closely related dinosaur families the Caenagnathidae and the Oviraptoridae that together are classified as the Caenagnathoidea. The Oviraptorosauria are united by having very bird-like skeletons, with highly pneumatised bones. In addition, the rostrum is very short, and these dinosaurs have beaks. The beak is often, but not always edentulous (no teeth). These dinosaurs were all probably feathered.

A model of an Oviraptor.
An Oviraptor dinosaur model (CollectA Age of Dinosaurs).

The image (above) depicts an Oviraptor model from the CollectA Age of Dinosaurs range.

To view this range of prehistoric animal figures: CollectA Age of Dinosaurs/Prehistoric Life Models.

The Caenagnathidae Family and Eoneophron infernalis

The family Caenagnathidae, together with its closely related sister family the Oviraptoridae, comprises the superfamily Caenagnathoidea. Virtually all known members of this superfamily are confined to the Late Cretaceous. Taxonomically the Caenagnathidae is defined as Chirostenotes pergracilis and all other theropods more closely related to it than they are to Oviraptor philoceratops.

Most of these dinosaurs tend to be quite small. As a result, they are probably underrepresented in the fossil record. For example, Anzu wyliei was thought until recently to be the only caenagnathid from the Hell Creek Formation. However, there are probably at least three caenagnathids present in Hell Creek strata, including the recently named Eoneophron infernalis.

Eoneophron infernalis limb bones
The femur (left) and right tibia (right) of Eoneophron. Picture credit: Kyle Atkins-Weldman.

Caenagnathids Not Closely Related to Ostriches

The Caenagnathidae family was originally erected by Raymond Martin Sternberg (1940), the son of the pioneering palaeontologist Charles Mortram Sternberg. Raymond Martin Sternberg thought that these dinosaurs were flightless birds. He erected the Caenagnathidae family which translates as “recent jaws”. It was mistakenly thought that these theropods were closely related to the Palaeognathae “old jaws” bird family. Extant palaeognath birds include the flightless Kiwi, the Ostrich and the Rhea as well as volant forms such as Tinamou birds. It is now known that the Caenagnathidae family of non-avian dinosaurs are not closely related to palaeognaths.

Caenagnathids are confined to the Late Cretaceous of Asia and North America. They tend to have small heads, long necks and short tails.

Time-calibrated Oviraptorosauria clade consensus tree showing the position of Eoneophron infernalis. Picture credit: Atkins-Weltman et al.

Challenging Phylogenetic Assessment

Whilst the fragmentary nature of most caenagnathid specimens makes phylogenetic assessment challenging, in the recent Eoneophron infernalis paper the researchers undertook a time-calibrated phylogenetic analysis of the Oviraptorosauria. Eoneophron was placed as a sister taxon to Citipes elegans and Elmisaurus rarus.

The difficulties involved in classifying oviraptorosaurs is exemplified by this placement. Although skeletal similarities between these three dinosaurs exist, there is a lack of comparable fossil material to study. Citipes elegans is geologically older. Its fossils come from the Dinosaur Provincial Park Formation of Alberta (Campanian faunal stage of the Late Cretaceous). In contrast, Elmisaurus rarus probably predates Eoneophron infernalis by a couple of million years. It too is from the Maastrichtian faunal stage of the Cretaceous. However, E. rarus fossils come from the Nemegt Formation of Mongolia.

A revision of already described specimens coupled with improved fossil sampling should help palaeontologists to gain a better understanding of the taxonomy of the Oviraptorosauria and specifically the enigmatic Caenagnathidae.

The Oviraptorosauria clade* also includes some other theropods regarded as basal members of this clade. For example, Incisivosaurus gauthieri from the Early Cretaceous of China.

Visit the Everything Dinosaur website: Everything Dinosaur.

6 02, 2024

New Species of Jurassic Pterosaur from the Isle of Skye

By |2024-02-06T13:45:11+00:00February 6th, 2024|Dinosaur and Prehistoric Animal News Stories, Dinosaur Fans, Main Page, Palaeontological articles, Photos/Pictures of Fossils|0 Comments

A new species of Jurassic pterosaur has been described based on fossils found on the Isle of Skye. The new flying reptile has been named Ceoptera evansae (Ki-yo-op-ter-rah evans-say). It lived around 168-166 million years ago (Bathonian faunal stage of the Middle Jurassic). It has been classified as part of the controversial Darwinoptera clade. The discovery of Ceoptera demonstrates that this clade was considerably more diverse than previously thought. The Darwinoptera are now thought to have persisted for more than twenty-five million years and probably had a worldwide distribution.

Ceoptera life reconstruction
The Isle of Skye around 168 million years ago. A flock of Ceoptera take to the skies as turtles look on and a group of sauropods wander towards the treeline. A large pterosaur is seen overhead, we suspect that this is a solitary Dearc sgiathanach. Picture credit: NHM and Mark Witton.

The artist has depicted a single, slender-winged pterosaur soaring high above the Ceoptera flock. We suspect that this is a representation of the recently described rhamphorhynchid Dearc sgiathanach.

To read an article about D. sgiathanach: Fantastic Pterosaur from the Isle of Skye.

The Kilmaluag Formation

The fossil remains were found partially exposed on a large boulder situated a few metres from the cliffs on the north side of Glen Scaladal at Cladach a’Ghlinne, a small beach that forms part of the coastline of Loch Scavaig, on the Strathaird Peninsula, Isle of Skye. The fossil bearing rocks are associated with the Kilmaluag Formation. The density and hardness of the matrix, coupled with the fragile nature of the fossil bones made the specimen unsuitable for mechanical preparation.

A complex process of acid bath immersion was undertaken to weaken the matrix and to expose the bones. The acid immersion, stabilising via rinsing and oven drying was repeated twenty-nine times in order to get the bones suitably prepared for analysis and CT scanning.

Ceoptera evansae fossils.
The fossilised remains of Ceoptera evansae. The slab (top left) contains the shoulder region, parts of the wing and vertebrae. Picture credit: Trustees of the Natural History Museum London.

Ceoptera evansae

The discovery of Ceoptera underpins a new and more complex model for the early evolution of pterosaurs. Flying reptile fossils from the Middle Jurassic are extremely rare. Those that have been found are relatively incomplete and fragmentary. Whilst no cranial material is associated with Ceoptera evansae, this discovery demonstrates that the major Jurassic pterosaur clades were present before the end of the Early Jurassic.

The fossils also provide important new information concerning the geographic and stratigraphic range of the controversial clade Darwinoptera. It had been thought that this species-poor group were largely restricted to the Upper Jurassic of eastern Asia. With the discovery of Ceoptera it suggests that these pterosaurs were both temporally and geographically widespread.

Many of the bones remain completely embedded in rock and can only be studied using CT-scanning. This pterosaur is one of the first flying reptiles to be digitally assessed using scans and computer modelling.

Senior author of the paper, Professor Paul Barrett (London Natural History Museum), stated:

“Ceoptera helps to narrow down the timing of several major events in the evolution of flying reptiles. Its appearance in the Middle Jurassic of the UK was a complete surprise, as most of its close relatives are from China. It shows that the advanced group of flying reptiles to which it belongs appeared earlier than we thought and quickly gained an almost worldwide distribution.”

3D model of Ceoptera evansae fossil material.
A three-dimensional model showing the layout and configuration of the fossil material. Picture credit: Liz Martin-Silverstone.

Ceoptera evansae – What’s in a Name?

The generic name is derived from the Scottish Gaelic word cheò or ceò (pronounced ‘ki-yo’), meaning mist. This is a reference to the common Gaelic name for the Isle of Skye Eilean a’ Cheò, or Isle of Mist), and the Latin ptera, meaning wing (feminine).

The species name honours Professor Susan E. Evans. It was Professor Evans who first became aware of the Glen Scaladal site’s potential for vertebrate fossils.

Lead author Dr Liz Martin-Silverstone, a palaeobiologist at the University of Bristol explained:

“The time period that Ceoptera is from is one of the most important periods of pterosaur evolution, and is also one in which we have some of the fewest specimens, indicating its significance. To find that there were more bones embedded within the rock, some of which were integral in identifying what kind of pterosaur Ceoptera is, made this an even better find than initially thought. It brings us one step closer to understanding where and when the more advanced pterosaurs evolved.”

Everything Dinosaur acknowledges the assistance of the press team at the University of Bristol and a media release from the London Natural History Museum in the compilation of this article.

The scientific paper: “A new pterosaur from the Middle Jurassic of Skye, Scotland and the early diversification of flying reptiles” by Elizabeth Martin-Silverstone, David M. Unwin, Andrew R. Cuff, Emily E. Brown, Lu Allington-Jones and Paul M. Barrett published in the Journal of Vertebrate Paleontology.

The Everything Dinosaur website: Everything Dinosaur.

5 02, 2024

University Student Discovers New Dinosaur Species

By |2024-02-06T20:09:32+00:00February 5th, 2024|Adobe CS5, Dinosaur and Prehistoric Animal News Stories, Dinosaur Fans, Main Page, Palaeontological articles, Photos/Pictures of Fossils|0 Comments

To discover a new dinosaur species might mark the high point of a long career in palaeontology for some scientists. However, for one Oklahoma State University (OSU) student they can already put a tick in the “named a new dinosaur box” on their curriculum vitae. Kyle Atkins-Weltman (PhD student in the School of Biomedical Sciences), was studying a selection of foot and leg bone fossils of what was thought to be a juvenile Anzu wyliei. Remarkably, analysis of the fossils indicated that these bones came from a mature animal and as such they represented a new dinosaur species. Based on these findings, Kyle was able to erect a new Hell Creek theropod – Eoneophron infernalis.

Eoneophron infernalis limb bones.
Limb bones of the newly described Hell Creek Formation caenagnathid Eoneophron infernalis. Picture credit: Kyle Atkins-Weldman.

The picture (above) shows limb bones from the newly described caenagnathid. Metatarsals (left) with the right tibia (centre) and a femur (right).

Pharaoh’s Dawn Chicken from Hell

Bone histology revealed the fossils to represent a dinosaur at least six years of age when it died. These were not the bones from a juvenile A. wyliei, but from a smaller but closely related theropod species. The student named the new dinosaur Eoneophron infernalis. It translates as “Pharaoh’s dawn chicken from Hell”. Team members at UK-based Everything Dinosaur pronounce this dinosaur as ee-on-oh-fron in-fur-nal-lis.

The name honours the description of the Anzu taxon as well as the student’s late beloved pet, a Nile monitor lizard named Pharaoh.

Student Kyle Atkins-Weltman.
Oklahoma State University PhD student Kyle Atkins-Weltman. Picture credit: Matt Barnard/OSU Centre for Health Sciences.

Eoneophron infernalis and Implications for Caenagnathid Diversity

Previously, only one caenagnathid (Anzu wyliei) was known from the Hell Creek Formation. It was formally named and described in 2014 (Lamanna et al). Palaeontologists were aware of smaller, fragmentary fossil bones representing caenagnathids from the Hell Creek Formation. It was unclear whether these fossils represented distinct, undescribed taxa or juvenile A. wyliei specimens. Eoneophron infernalis is estimated to have stood around one metre high at the hips and weighed approximately seventy kilograms. In contrast, Anzu wyliei was much larger, with a hip height of about 1.5 metres and weighing three hundred kilograms.

This new taxon is also distinct from other small caenagnathid material previously described from the area. Scientists postulate that there are potentially three distinct caenagnathid genera in the Hell Creek Formation. These results show that caenagnathid diversity in the Hell Creek ecosystem has probably been underestimated.

Caenagnathids of the Hell Creek Formation.
A life reconstruction of Eoneophron infernalis (left), an as yet, undescribed caenagnathid MOR 752 (bottom), and Anzu wyliei (right). Picture credit: Zubin Erik Dutta.

A Feathered Dinosaur

When asked to describe Eoneophron infernalis, Kyle highlighted how closely related to birds these dinosaurs were. He stated:

“It was a very bird-like dinosaur. It had a toothless beak and a relatively short tail. It’s hard to tell its diet because of the toothless beak. It definitely had feathers. It was covered in feathers and had wings.”

Co-author of the scientific paper and Kyle’s faculty advisor Associate Professor Eric Snively commented:

“Kyle is the first student researcher at OSU-CHS to reveal, describe and name a new dinosaur.”

When it looked like the fossils may not belong to an Anzu, Atkins-Weltman turned to caenagnathid researchers Greg Funston, PhD, a palaeontologist with the Royal Ontario Museum in Ontario, Canada, and palaeontology PhD candidate Jade Simons with the University of Toronto for their assistance.

He was also able to involve Associate Professor of Anatomy Dr Holly Woodward Ballard, an expert in bone histology.

A view of the metatarsal bones of Eoneophron infernalis.
A view of the metatarsal bones of Eoneophron infernalis. Picture credit: Kyle Atkins-Weldman.

A Thrilling Discovery

Kyle Atkins-Weltman explained that his project and published findings would not have been possible without his co-authors and those who assisted him.

He added:

“It was really thrilling. Based on the work and research I do, I never thought I would be someone to discover a new dinosaur species.”

Eoneophron infernalis life reconstruction.
Eoneophron infernalis life reconstruction. Picture credit: Zubin Erik Dutta.

Everything Dinosaur acknowledges the assistance of a media release from Oklahoma State University in the compilation of this article.

The scientific paper: “A new oviraptorosaur (Dinosauria: Theropoda) from the end-Maastrichtian Hell Creek Formation of North America” by Kyle L. Atkins-Weltman, D. Jade Simon, Holly N. Woodward, Gregory F. Funston and Eric Snively published in PLOS One.

2 02, 2024

Spotting an Ammonite Fossil at a Trade Fair

By |2024-02-06T22:05:42+00:00February 2nd, 2024|Educational Activities, Everything Dinosaur Products, Geology, Main Page, Photos/Pictures of Fossils, Press Releases|0 Comments

Team members at Everything Dinosaur recently visited the Spielwarenmesse trade fair in Germany. Many of the buildings in this part of Bavaria are constructed from limestone. The limestone dates from the Jurassic and is highly fossiliferous. Whilst walking between the halls of the Spielwarenmesse on our way to another meeting, we spotted an ammonite fossil in the stone floor,

Ammonite fossil in the stone floor on the site of the annual Spielwarenmesse trade fair.
On the floor of the Spielwarenmesse building fossils can be spotted. For example, this limestone slab has the remains of an ammonite clearly visible within it. The red arrow highlights the position of the ammonite fossil. Picture credit: Everything Dinosaur.

Picture credit: Everything Dinosaur

Looking for an Ammonite Fossil

Numerous fossils can be spotted entombed in the polished stone floors of the vast Messezentrum Nuremberg which hosts the international toy fair. Belemnites, bivalves and oyster shells are common. Ammonites tend to be a little rarer, but there are still plenty to see.

Ammonite model next to a fossil specimen.
A model of an ammonite (foreground) with a polished ammonite in the background. The strongly ribbed shell and the obvious keel of the ammonite replica. Picture credit: Everything Dinosaur.

Picture credit: Everything Dinosaur

The picture (above) shows a Bullyland ammonite replica in the foreground with a polished ammonite fossil behind it.

To view the Bullyland range of prehistoric animal models and figures: Bullyland Prehistoric Animal Replicas.

A spokesperson from Everything Dinosaur explained that many municipal buildings in and around Nuremberg were built from limestone that contains lots of fossils. The sediments that went onto form the limestone were Upper Jurassic in age.

The spokesperson added:

“Nuremberg airport is famous for its fossils. It is always intriguing to see what we can spot in the floor tiles as we wait to board an aeroplane.

Visit the award-winning Everything Dinosaur website: Everything Dinosaur.

1 02, 2024

Examining a Sauropod Skin Impression

By |2024-02-14T10:27:24+00:00February 1st, 2024|Adobe CS5, Dinosaur Fans, Main Page, Palaeontological articles, Photos/Pictures of Fossils|0 Comments

Team members photographed a sauropod skin impression whilst visiting the London Natural History Museum. The specimen is part of the Patagotitan exhibition entitled “Titanosaur – Life as the Biggest Dinosaur”. Although most visitors probably overlook this fossil it is perhaps one of the most important fossil specimens on display in this part of the museum.

A detailed analysis of the skin impression provided new information on the anatomy of sauropods. A study revealed features on the skin that might explain how these dinosaurs were able to grow so big.

Sauropod skin impression.
A sauropod skin impression (NHMUK R1868) on display as part of the London Natural History Museum Patagotitan exhibition. Picture credit: Everything Dinosaur.

Picture credit: Everything Dinosaur

Studying a Sauropod Skin Impression

This is a fossilised imprint of sauropod skin. It is specimen number NHMUK R1868. It was the first skin impression to be described in any non-avian dinosaur. The fossil, discovered in 1852 provided the first evidence that sauropods had scaly skin. The impression was formed when the skin of a carcase was pressed into soft mud. This left an impression of the skin contours imprinted on the sediment. Over millions of years the ground hardened into rock.

The fossil was discovered in Hastings along with a large forelimb. The material comes from the Hasting Beds, which are part of the Wealden Group and represent Lower Cretaceous deposits. The sauropod, possibly a basal titanosaur, has been named Haestasaurus becklesii. The skin impression is thought to have come from the forearm, the presence of smaller scales at one end of the specimen suggests that the skin impression might have come from the elbow area. The smaller scales would have permitted greater flexibility in the joint.

Patagotitan skeleton on display.
Sue from Everything Dinosaur poses in front of the colossal Patagotitan skeleton which is being exhibited at the Natural History Museum (London). Picture credit: Everything Dinosaur.

Picture credit: Everything Dinosaur

Patagotitan dinosaur model.
A Patagotitan dinosaur model. The long neck and tail may have helped with thermoregulation, enabling this super-sized tetrapod to lose heat efficiently.

The image above shows the recently introduced Wild Safari Prehistoric World Patagotitan dinosaur model.

To view this range of prehistoric animal figures: Wild Safari Prehistoric World Models.

A Sauropod Skin Scientific Paper

A paper published in February 2022 (Pittman et al) examined NHMUK R1868 in detail using laser-simulated fluorescence (LSF). This technique reveals much more detail at the microscopic level than exposure to normal light and UV light. The researchers discovered that the skin was covered in tiny bumps (papillae). These convex bumps increased the surface area of the skin, and it was thought that they played a role in thermoregulation.

Large animals, such as sauropods need to find ways to stop their bodies overheating. The extended surface area of their long necks and tails would have helped, but the researchers speculate that these small bumps greatly increased the skin surface area, thus permitting more efficient heat exchange between their bodies and the environment.

A review of other sauropod skin fossils demonstrated that intrascale papillae were unique to and widespread across the Neosauropoda. This suggests that this trait evolved early in the Sauropoda, and it might explain why these types of dinosaurs were able to grow so big and to become giants.

The scientific paper: “Newly detected data from Haestasaurus and review of sauropod skin morphology suggests Early Jurassic origin of skin papillae” by Michael Pittman, Nathan J. Enriquez, Phil R. Bell, Thomas G. Kaye and Paul Upchurch published in Communications Biology.

Visit the Everything Dinosaur website: Everything Dinosaur.

27 01, 2024

Are These Really Polacanthus Fossils?

By |2024-02-18T20:30:22+00:00January 27th, 2024|Adobe CS5, Dinosaur Fans, Main Page, Photos of Everything Dinosaur Products, Photos/Pictures of Fossils|0 Comments

In the Liverpool World Museum there are several exhibits that feature dinosaur fossils. One display case includes two, worn fossils which are described as Polacanthus foxii fossil material. The fossil material has a rounded appearance. According to the display label these fossils are from the Wealden Beds exposed at Chilton Chine on the Isle of Wight. They are described as casts (copies) of a Polacanthus braincase. The actual fossils probably came out of the cliffs and were exposed on the beach for some time prior to their discovery. These fossils were rolled around the beach and attrition caused their rounded and weathered appearance.

However, these fossils, or their copies may not represent Polacanthus foxii.

Polacanthus fossils.
Casts of Polacanthus fossils. Fragmentary and eroded replica armoured dinosaur fossils on display at Liverpool Museum. These fossils have been assigned to Polacanthus foxii. Picture credit: Everything Dinosaur.

Picture credit: Everything Dinosaur

Labelling Polacanthus Fossils

The Wealden Group covers several million years of deposition. To date, armoured dinosaurs named and scientifically described from the Wealden Group include Hylaeosaurus, the recently named Vectipelta and Polacanthus.

To read Everything Dinosaur’s blog post on Vectipelta: Vectipelta barretti Honours Natural History Museum Professor.

The fossils, although labelled as Polacanthus, may not represent that taxon. Fossils from the Isle of Wight attributed to Polacanthus may actually represent multiple, as yet unnamed taxa.

Polacanthus foxii dinosaur model.
The CollectA Deluxe Polacanthus foxii dinosaur model. Picture credit: Everything Dinosaur.

Picture credit: Everything Dinosaur

The picture (above) shows the new for 2024 CollectA Deluxe Polacanthus model. This figure is based on the Polacanthus foxii holotype material. It is a modern interpretation of the known fossil material.

To view the CollectA Deluxe range of figures: CollectA Deluxe Prehistoric Animal Figures.

Vectipelta for example, is only distantly related to both Hylaeosaurus and Polacanthus foxii.

It is unlikely that all the fossil material ascribed to the Polacanthus taxon displayed in museums actually represents P. foxii, or indeed any other possible species as yet unassigned to the Polacanthus genus.

The Everything Dinosaur website: The Everything Dinosaur website.

24 01, 2024

New Study into Very Old Vertebrate

By |2024-01-31T12:07:58+00:00January 24th, 2024|Adobe CS5, Main Page, Palaeontological articles, Photos/Pictures of Fossils|0 Comments

The evolution of a jaw and the transition from passive feeding to predatory behaviour is regarded as one of the most significant events in the evolution of vertebrates. It has been suggested that early vertebrates were passive, suspension feeders. They removed particles of food in the water column by some form of filtration. Over time, a more predatory, active lifestyle evolved. Living jawless vertebrates today such as the Hagfish (Myxinidae family) are scavengers as well as predators. Studying these animals can help to inform palaeontologists about the potential feeding strategies of extinct jawless fish. However, the feeding strategy of these animals and jawed stem-gnathostomes (the phylogenetic intermediates of living jawless and jawed vertebrates) remains unclear.

Heterostrachan and placement within the vertebrates.
The diversity and relationships of jawless and jawed vertebrates, crosses indicate extinct clades. The red star indicates the location of the Heterostraci. Picture credit: Grohganz et al with additional annotation by Everything Dinosaur.

New and Innovative Research into Extinct Jawless Fishes

A new scientific paper, published in the Journal of Vertebrate Paleontology casts doubt on the idea that some jawless vertebrates were filter feeders. Scientists from the University of Bristol used innovative research techniques to examine the dentition of extinct jawless heterostracans. The Heterostraci are an extinct subclass of the Agnatha (jawless fishes).

The research discovered that the forward-facing denticles on the oral plates of heterostracans were not adaptations for filter feeding.

Madleen Grohganz, the lead author of the paper from Bristol University’s Palaeobiology Research Group commented:

“The origin of vertebrates, our very own evolutionary lineage, is widely regarded as one of the most important events in evolutionary history. Early vertebrate evolution is a much-debated topic among biologists and palaeontologists and there are still many unresolved questions.”

Oral plates of Protopteraspis.
Articulated, V-shaped oral plate apparatus of Protopteraspis vogti; B, aboral; C, oral views. Rostral is to the top of the image in B and C. Note scale bar = 2 mm. Picture credit: Grohganz et al.

The Jawless Heterostracans

Heterostracans are among the oldest of all the vertebrates. Their mode of feeding remains controversial. To determine whether they were filter feeders or predators sophisticated modern computational palaeobiological techniques were employed in this study.

Heterostracans possessed a feeding apparatus of rod-like oral plates with rows of forward-facing denticles outside of the mouth. These traits had been thought to represent combs for filter feeding.

The team employed Computational Fluid Dynamics (CFD), a technique from engineering that simulates fluid flows and their interaction with solids to test this hypothesis. Water flow modelled around these structures would indicate whether these oral plates were effective at filtering out particles of food.

All the tested models, independent of denticle orientation, showed similar flow, velocity and vorticity patterns. Based on these analyses the team rejects the hypothesis that denticle orientation is a specific adaption to suspension feeding. The denticles only occur on the lateral sides of the very tip of the oral plates. They may have played a role in preventing oversized food particles, sediment or parasites from lodging between the plates.

Madleen Grohganz stated:

“Our study is one of the first, that actively tests feeding mode hypotheses of early jawless vertebrates instead of making poorly constrained inferences. This is an important step towards better understanding the feeding mode of early jawless vertebrates, testing evolutionary scenarios and ultimately shedding more light on early vertebrate evolution.”

More Research into Stem-gnathostomes Required

The feeding strategies of stem-gnathostomes remains largely unknown. The researchers conclude that other feeding theories such as whether heterostracans were capable of biting still require testing.

The exact nature of heterostracan feeding remains an open question. Other feeding hypotheses, which propose a mechanical function related to active biting or scavenging, still need to be tested. The creation of three-dimensional skull models based on non-destructive CT scans could yield more evidence to help inform palaeontologists. Madleen Grohganz and her colleagues agree that more research is required on these basal vertebrates.

Dr Grohganz explained:

“Previous feeding mode hypotheses of early jawless vertebrates have mainly been based on poorly constrained inferences. But using computational palaeobiological methods, we were able to actually test and reject one of these feeding mode hypotheses.”

Everything Dinosaur acknowledges the assistance of a media release from the University of Bristol in the compilation of this article.

The scientific paper: “Testing hypotheses of pteraspid heterostracan feeding using computational fluid dynamics” by Madleen Grohganz et al published in the Journal of Vertebrate Paleontology.

Visit the Everything Dinosaur website: Everything Dinosaur.

22 01, 2024

Student Discovers Remarkable Late Triassic Flying Reptile in Somerset

By |2024-01-23T09:12:59+00:00January 22nd, 2024|Adobe CS5, Dinosaur and Prehistoric Animal Drawings, Dinosaur Fans, Main Page, Palaeontological articles, Photos/Pictures of Fossils|0 Comments

A student from the University of Bristol has confirmed the presence of Kuehneosaurs in the Late Triassic of southwestern England. These gliding reptiles were part of a rich reptile dominated fauna that lived on a series of sub-tropical islands, part of an ancient archipelago. The biggest island extended from Frome in the east to Weston-super-Mare in the west. It was around eighteen miles (thirty kilometres long). It is referred to as the Mendip Palaeo-island.

Kuehneosaurus life reconstruction.
An artist’s impression of a gliding reptile Kuehneosaurus. Picture credit: Mike Cawthorne.

Picture credit: Mike Cawthorne

Kuehneosaurs on Sub-tropical Islands

Kuehneosaurs superficially resemble lizards. However, they were more closely related to the ancestors of crocodilians and dinosaurs. They were small animals, which could fit neatly on the palm of a hand, and there were two species present. One species had extensive wing flaps, the second species had much shorter wings. These wings consisted of skin stretched over elongated ribs. Powered flight was beyond them, but they probably were very competent gliders.

Kuehneosaurs probably occupied a niche in the ecosystem similar to the extant flying lizard Draco from southeast Asia. They most likely wandered about on the ground and climbed trees in search of insects and other small invertebrates. To escape from predators, or to make rapid progress through the trees, they could launch themselves into the air and glide for several metres.

The discovery of Kuehneosaurs in the Late Triassic ecosystem was made by University of Bristol Masters student Mike Cawthorne. He had been examining numerous reptile fossils collected from limestone quarries, which represent deposits associated with the Mendip Palaeo-island.

Kuehneosaurus reptile fossils
Image showing partial skeleton of gliding reptile Kuehneosaurus on rock from Emborough. Picture credit: David Whiteside.

Picture credit: David Whiteside

No Dinosaur Fossils Found but They Were Probably Present

The research, published in the “Proceedings of the Geologists’ Association”, also records the presence of reptiles with complex teeth, the trilophosaur Variodens and the aquatic Pachystropheus that probably lived a bit like a modern-day otter likely eating shrimps and small fish. However, no dinosaur bones were found. These animals either fell or their bones were washed into caves and cracks in the limestone. This led to their preservation and the development of a fossil assemblage.

Emborough rock fossils.
A jawbone of unusual Triassic reptile Variodens first named from Emborough. B) Typical Emborough rock with many bones. C, D and E) bones from land-living relatives of crocodiles. Picture credit: David Whiteside.

Picture credit: David Whiteside

Masters student Mike Cawthorne commented:

“All the beasts were small. I had hoped to find some dinosaur bones, or even their isolated teeth, but in fact I found everything else but dinosaurs. The collections I studied had been made in the 1940s and 1950s when the quarries were still active, and palaeontologists were able to visit and see fresh rock faces and speak to the quarrymen.”

A Home for a Diverse Assemblage of Small Reptiles including Kuehneosaurs

Professor Mike Benton from Bristol University’s School of Earth Sciences added:

“It took a lot of work identifying the fossil bones, most of which were separate and not in a skeleton. However, we have a lot of comparative material, and Mike Cawthorne was able to compare the isolated jaws and other bones with more complete specimens from the other sites around Bristol. He has shown that the Mendip Palaeo-island, which extended from Frome in the east to Weston-super-Mare in the west, nearly 30 km long, was home to diverse small reptiles feeding on the plants and insects. He didn’t find any dinosaur bones, but it’s likely that they were there because we have found dinosaur bones in other locations of the same geological age around Bristol.”

Paying Tribute to the Fossil Collectors

Dr David Whiteside (University of Bristol) praised the work of the amateur fossil collectors and academics who found the fossils stating:

“The bones were collected by some great fossil finders in the 1940s and 1950s including Tom Fry, an amateur collector working for Bristol University and who generally cycled to the quarries and returned laden with heavy bags of rocks. The other collectors were the gifted researchers Walter Kühne, a German who was imprisoned in Great Britain in the second world war, and Pamela L. Robinson from University College London. They gave their specimens to the Natural History Museum in London and the Geological collections of the University of Bristol.”

Everything Dinosaur acknowledges the assistance of a media release from the University of Bristol in the compilation of this article.

The scientific paper: “Latest Triassic terrestrial microvertebrate assemblages from caves on the Mendip palaeoisland, S.W. England, at Emborough, Batscombe and Highcroft Quarries” by M. Cawthorne, D. I. Whiteside, and M. J. Benton published in the Proceedings of the Geologists’ Association.

Visit the Everything Dinosaur website: The Everything Dinosaur Website.

Go to Top