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Showing results for tags 'Upper Cretaceous'.
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I went fossil hunting at the North Sulphur River in Ladonia, Texas, today and found two relatively small vertebrae and an interesting bone shard that I would love to have identified. As far as I know, the fossils from around this area are typically from the Upper Cretaceous period, though fossils from different time periods have been found here. If you would please help me identify these fossils, that would be great!
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I went fossil hunting at the North Sulphur River in Ladonia, Texas, today and found two relatively small vertebrae and an interesting bone shard that I would love to have identified. As far as I know, the fossils from around this area are typically from the Upper Cretaceous period, though fossils from different time periods have been found here. If you would please help me identify these fossils, that would be great!
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I found this Phlycticrioceras trinodosum heteromorph specimen in June of 2018 whilst hunting the middle/upper Coniacian Atco formation. It is the largest fragment of this species that I am aware of, having a whorl height of 51 mm as opposed to 47 mm of the largest fragment I've seen published. This genus is a bigger, rarer, and (mostly) younger cousin of Allocrioceras. I sent pictures of it to Keith Minor and he pointed out that there was also an echinoid sticking out of the specimen, something which I had totally missed! With much of the echinoid still stuck in the living chamber it is hard to get a definitive ID. But because it has such a shallow anterior ambulacra, which gives the anterior end a more smooth rather than definitive heart shape, he ruled out both Mecaster texanus and batensis. He suggested Micraster since the site has a strong European component in both the bivalve and ammonite faunas, and because the periproct side has the right shape. From finding other, although not as well preserved specimens that show similar morphology he appears to be right. I have yet to confirm this ID with Andrew Smith, but either way I think the piece is worth showing. And reading this thread got me thinking about how this could have happened and what effect it could have had on the echinoid's preservation. My thought is that because irregular echinoids lived and today still live most of their lives burrowing in the sediment it is unlikely that it would have crawled into the living chamber, but instead that it was blown into it post-mortem via currents that had dredged it out of the sediment. I already know that this site was a high energy environment from my other finds here so this seems the most likely possibility to me. But because of the fact there is still at least one spine still attached to the specimen it could not have been swept up from the sediment too long after death or all of its hairlike spines would have blown away. I do, however, find it interesting that it is positioned anterior first with its posterior towards the aperture, the position I would expect to see it in if it had indeed crawled into the shell. The specimen is also the best preserved echinoid from this site so far. Despite the ammonites being generally well preserved and not too crushed, most of the echinoids that I have from the site are terribly crushed, flakey, and often infested with rotting pyrite. I think being encapsulated in the chamber very much reduced those effects. Even though the ammonite and the echinoid are a bit crushed, the echinoid would have probably been worse off otherwise. The heteromorph fragment length is 70 mm and the whorl breadth, being a bit crushed, is 13 mm. I would think that this specimen, with its open planispiral coiling, would would have been at least over a foot in diameter when complete. It is the robust (female) morph of the species with a rib index of 5½. For comparison in Fig. 1 I pictured it with my most complete P. trinodosum specimen. From the part of the echinoid that is exposed I can measure 25 mm in length, 25 in width, and a thickness of 8 mm. I have also found abundant yet scattered fish remains at the site, so perhaps one day an ammonite-fish will come my way. But until then, anyone else got ammonite-echinoids to show? Fig. 1. Fig. 2.
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- and drink em bot up
- atco formation
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From the album: Campanian/Maastrichtian echinoids from SE Pyrenees
Hemiaster (bolbaster) batalleri (Lambert, 1933)-
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- hemiaster
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From the album: Campanian/Maastrichtian echinoids from SE Pyrenees
Hemiaster (bolbaster) batalleri (Lambert, 1933)-
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- hemiaster
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From the album: Campanian/Maastrichtian echinoids from SE Pyrenees
Hemiaster (bolbaster) batalleri (Lambert, 1933)-
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- hemiaster
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Here are two teeth from a fairly recently (2011) described Scapanorhynchus species from the Upper Cretaceous Santonian in New Mexico. Scapanorhynchus puercoensis has a dentition similar to S. lewisii and was likely very similar. My son and I do classroom science presentations about fossils and our shark program features Scapanorhynchus. He used the lewisii as the basis for his illustration and now we can actually provide teeth that are a closer match to that than S. texanus likely was. This also allows him to draw S. texanus in a more Sand Tiger like form which we both think it was. I put quite a bit of research in our programs and we strive for accuracy so I am really digging these teeth !!!
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- goblin shark
- santonian
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couldn't decide whether to post this to ID or general discussion. Would be curious to have an ID on this but the interesting thing is its position and growth habit. The bryozoan is growing on the inside of a baculite living chamber. No aragonitic preservation in the Peedee so the shell of the baculite is gone, leaving the bottom of the bryozoan colony exposed. The radial growth is also interesting. Can't say I've ever noticed that before but it may be common. Baculite fragment is 40x25mm. Fossil was found in the loose arenite of the Rocky Point Member of the Peedee Formation, late Cretaceous, Maastrichtian. Pender Co., NC, USA
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- bryozoan
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I have seen this type of trace many times before...each time I wonder. Do you have any ideas? The knife is 3" in length...thank you for your thoughts.
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Fossil teeth found in the Hell Creek badlands of southeastern Montana! measures approx .42 inches long Amphibian? They are from uppermost Cretaceous age (Maastrichtian) deposits, in the Hell Creek Formation, Carter County, Montana. Any help identifying would be appreciated.
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- hell creek
- teeth
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Originally the specimen was collected as a concretion from upper Pierre Shale Formation near the lowest level of the Fox Hills Formation. The collection location is Cedar Creek about seven miles south of Glendive, Montana. The Date collected was Oct. 12, 2018. Later, I removed most of the concretion/matrix with diamond blade and bits. Two of the hoploscaphites spedeni were badly crushed and fractured during fossilization and are missing half of shells. During prep, I miscalculated the depth of cutting blade, slightly damaging the middle scaphites.
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- ammonite
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While on an adventure with @Pilobolus, exploring the Dakota Sandstone and underlying shales, I found something very exciting*... ...my first coiled Nautiloid! Coiled Nautiloid Upper Cretaceous (Cenomanian) Paguate Member of the Dakota Formation Sandoval County, New Mexico Now, after a bit of research, I write here to lean on this Forum for assistance with identification. I find that this specimen sits well in the genus Kummelonautilus...what say you? Many thanks for your help, -P. *Bryan can attest to my yelling and jumping around. @FossilDAWG
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- acanthoceras amphibolum ammonite zone
- angulithes
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New Cretaceous Pterosaur from Southeastern France
The Amateur Paleontologist posted a topic in Fossil News
Just got this report of a new pterosaur (Mistralazhdarcho maggii) from the Upper Cretaceous of southeastern France The specimen was collected from the highly fossiliferous "Velaux-La Bastide Neuve" site (Bouches-du-Rhône region), a site known for diverse tetrapod remains. The remains described consist of a mandibular symphysis, a few vertebrae, and several limb bones (including 2 humeri, a radius, a pteroid, a metacarpal and a wing phalanx). The authors of the paper (see attached below) consider that due to incomplete ossification of the bones, the specimen might represent an immature individual. M. maggii helps to provide more insight into the Late Cretaceous European azhdarchid radiation. Romain Vullo, Géraldine Garcia, Pascal Godefroit, Aude Cincotta & Xavier Valentin (2018): Mistralazhdarcho Maggii, Gen. Et Sp. Nov., A New Azhdarchid Pterosaur from the Upper Cretaceous of Southeastern France, Journal of Vertebrate Paleontology, DOI: 10.1080/02724634.2018.1502670 Abstract: A series of pterosaur bones from the Upper Cretaceous (Campanian) of Velaux (Bouches-du-Rhône, southeastern France) is described. This material, including both cranial and postcranial elements found in close association and likely belonging to a single immature individual, is assigned to a new genus and species of azhdarchid pterosaur, Mistralazhdarcho maggii. This large-sized taxon (wingspan ca. 4.5 m in the holotype, possibly reaching 5–6 m in mature individuals) is characterized by a slightly downturned mandibular symphysis that shows a ‘V’-shaped cross-sectional profile and bears a well-developed, anteriorly located median eminence on its dorsal surface. The presence of a median eminence suggests that Mistralazhdarcho might be closely related to Alanqa from the Cenomanian of Morocco. The material described here represents the first partial skeleton of a pterosaur recovered from the Late Cretaceous deposits of western Europe, and the new taxon is one of the most completely known European azhdarchids. Mistralazhdarcho is intermediate in size between the medium-sized genus Eurazhdarcho and the giant-sized genus Hatzegopteryx, two azhdarchids from the Maastrichtian of Romania. The discovery of Mistralazhdarcho suggests the presence of a third azhdarchid size class in the continental ecosystems of the latest Cretaceous European archipelago. photography of the mandibular symphysis of M. maggii (measures 264mm). Here's the paper Vullo et al. 2018 Mistralazhdarcho.pdf Hope you liked this! -Christian
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- azhdarchid pterosaur
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Half a year of polished rudists from St. Bartholomä
FranzBernhard posted a topic in Member Collections
Hello, just to show off some polished rudists from the Campanian St. Bartholomä-formation, Styria, Austria, collected from March 2018 to September 2018. https://franzbernhard.lima-city.de/Radiolitidae_04bis09_2018.html https://franzbernhard.lima-city.de/Hippurites_04bis09_2018.html https://franzbernhard.lima-city.de/Vaccinites_04bis09_2018.html Enjoy! Ah, and if someone is interested in "Punkt 25" : http://www.thefossilforum.com/index.php?/blogs/entry/341-introduction-to-point-25/ http://www.thefossilforum.com/index.php?/blogs/entry/342-point-25-what´s-behind-the-red-x/ http://www.thefossilforum.com/index.php?/blogs/entry/343-point-25-surprise-at-home/ http://www.thefossilforum.com/index.php?/blogs/entry/344-point-25-summing-up/ Franz Bernhard -
From the album: Cretaceous Vancouver Island
Joeranina platys Upper Cretaceous Haslam Formation Duncan, British Columbia© D.G. Bowden
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Hey everyone There's this new bit of research from PeerJ, describing the partial remains of a new tyrannosaurid, Dynamoterror dynastes (pretty cool name, huh? ). The remains were from the Menefee Formation (Upper Cretaceous) of New Mexico, and are a valuable addition to our knowledge of North American tyrannosaurids. Partial cranial material of D. dynastes. McDonald et al. (2018). A new tyrannosaurid (Dinosauria: Theropoda) from the Upper Cretaceous Menefee Formation of New Mexico. Abstract: The giant tyrannosaurids were the apex predators of western North America and Asia during the close of the Cretaceous Period. Although many tyrannosaurid species are known from numerous skeletons representing multiple growth stages, the early evolution of Tyrannosauridae remains poorly known, with the well-known species temporally restricted to the middle Campanian-latest Maastrichtian (∼77–66 Ma). The recent discovery of a new tyrannosaurid, Lythronax argestes, from the Wahweap Formation of Utah provided new data on early Campanian (∼80 Ma) tyrannosaurids. Nevertheless, the early evolution of Tyrannosauridae is still largely unsampled. We report a new tyrannosaurid represented by an associated skeleton from the lower Campanian Allison Member of the Menefee Formation of New Mexico. Despite fragmentation of much of the axial and appendicular skeleton prior to discovery, the frontals, a metacarpal, and two pedal phalanges are well-preserved. The frontals exhibit an unambiguous autapomorphy and a second potential autapomorphy that distinguish this specimen from all other tyrannosaurids. Therefore, the specimen is made the holotype of the new genus and species Dynamoterror dynastes. A phylogenetic analysis places Dynamoterror dynastes in the tyrannosaurid subclade Tyrannosaurinae. Laser-scanning the frontals and creation of a composite 3-D digital model allows the frontal region of the skull roof of Dynamoterror to be reconstructed. You can download (for free!) the paper from this link: McDonald et al. 2018 Dynamoterror dynastes Hope you like this! -Christian
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From the album: Upper Cretaceous New Mexico
illustration from Hyatt, 1903: -
Hi folks, I found these two fragments on the Puntledge River in Courtenay, British Columbia, Canada. These are from shale rock of Upper Cretaceous age. I think the one on the right might be a heteromorph ammonite and but I have no idea on the left one. Perhaps a thick shell? The pieces are about 5cm in length in the photo. I would really appreciate any ideas on what type of fossils these are. Cheers, Martin
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From the album: MY FOSSIL Collection - Dpaul7
Armigatus brevissimus Fish Fossil Cenomanian of Hakel, Lebanon Upper Cretaceous Period (100.5-66 Million Years Ago) Armigatus is an extinct genus of clupeomorph fishes belonging to the order Ellimmichthyiformes. These fishes lived in the Upper Cretaceous (Cenomanian / Turonian, about 95-90 million years ago); their fossil remains have been found in the Middle East and North Africa. Armigatus has an osteoglossid-like tooth patch, a large foramen in the anterior ceratohyal and a series of subtriangular dorsal scutes, giving rise to their scientific name. The Latin genus name armigatus, means bearer of armor. Brevissimus signifies "shortest, smallest". Kingdom: Animalia Phylum: Chordata Class: Actinopterygii Subclass: Neopterygii Infraclass: Teleostei Superorder: Clupeomorpha Order: †Ellimmichthyiformes Genus: †Armigatus Species: †brevissimus -
From the album: MY FOSSIL Collection - Dpaul7
Armigatus brevissimus Fish Fossil Cenomanian of Hakel, Lebanon Upper Cretaceous Period (100.5-66 Million Years Ago) Armigatus is an extinct genus of clupeomorph fishes belonging to the order Ellimmichthyiformes. These fishes lived in the Upper Cretaceous (Cenomanian / Turonian, about 95-90 million years ago); their fossil remains have been found in the Middle East and North Africa. Armigatus has an osteoglossid-like tooth patch, a large foramen in the anterior ceratohyal and a series of subtriangular dorsal scutes, giving rise to their scientific name. The Latin genus name armigatus, means bearer of armor. Brevissimus signifies "shortest, smallest". Kingdom: Animalia Phylum: Chordata Class: Actinopterygii Subclass: Neopterygii Infraclass: Teleostei Superorder: Clupeomorpha Order: †Ellimmichthyiformes Genus: †Armigatus Species: †brevissimus -
From the album: MY FOSSIL Collection - Dpaul7
Armigatus brevissimus Fish Fossil Cenomanian of Hakel, Lebanon Upper Cretaceous Period (100.5-66 Million Years Ago) Armigatus is an extinct genus of clupeomorph fishes belonging to the order Ellimmichthyiformes. These fishes lived in the Upper Cretaceous (Cenomanian / Turonian, about 95-90 million years ago); their fossil remains have been found in the Middle East and North Africa. Armigatus has an osteoglossid-like tooth patch, a large foramen in the anterior ceratohyal and a series of subtriangular dorsal scutes, giving rise to their scientific name. The Latin genus name armigatus, means bearer of armor. Brevissimus signifies "shortest, smallest". Kingdom: Animalia Phylum: Chordata Class: Actinopterygii Subclass: Neopterygii Infraclass: Teleostei Superorder: Clupeomorpha Order: †Ellimmichthyiformes Genus: †Armigatus Species: †brevissimus -
My first post Need assistance with fossil ID. I believe this is a eagle ray tooth. Stratigraphic unit is likely Severn Formation, Upper Cretaceous in Maryland. Found along Magothy River near Ulmstead. Could also be from Paleocene Aquia formation as stratigraphic contact in cliff by beach. If Severn Formation - I believe an early example of ray in fossil record.
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Found this today in creek bed gravel near Bowie Maryland (near Old Crain Drive). Upper Cretaceous Severn Formation. Any idea? Interesting areas of white coloring, between tooth and base? I know base is missing. Does anyone know what causes the white banding?
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From the album: Upper Cretaceous New Mexico
from New Mexico Bureau of Geology & Mineral Resources
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