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Showing results for tags 'chondrichthyes'.
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Fossil marine vertebrates from the Upper Cretaceous of Akkermanovka
Praefectus posted a topic in Fossil News
Fossil marine vertebrates (Chondrichthyes, Actinopterygii, Reptilia) from the Upper Cretaceous of Akkermanovka (Orenburg Oblast, Southern Urals, Russia) Jambura et al., 2023 https://www.sciencedirect.com/science/article/pii/S0195667123003075?via%3Dihub Tylosaur (top), Polycotylid (middle), and Plesiosaur indet. teeth from the southern Urals.-
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- actinopterygii
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Seeking corrections and identification on shark teeth from Aurora, NC, USA (Miocene-Pliocene). Scale in mm. Thanks for any help you can provide! Sphyrna sp. (Hammerhead)? Carcharhinus sp(p). ? Carcharias sp.? Not sure. (Some kind of Galeocerdo?) Not sure. Not sure. (Carcharhinus sp(p).?
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- aurora
- carcharhinus
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I am finally going through my Florida shark teeth. Most of these are from the Peace River. Hoping to get confirmations and corrections on my tentative IDs. I have numbered the groupings of taxa. Scale is in mm. No. 1: Galeocerdo cuvier? No. 2: Negaprion brevirostris? No. 3: Negaprion brevirostris? No. 4: Charcarhinus spp.? No. 5: Odontaspis taurus? No. 6: Hemipristis serra? No. 7: Galeocerdo aduncus? G. cuvier?
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A shark tooth from my collection: a Cretalamna maroccana specimen
gond posted a topic in Member Collections
Hello everyone, it's been a while since I last posted on the forum In the last year my collection has reached 33 specimens, so I guess that "road to 35" is extremely close! Today I wanted to show you a specimen I acquired very recently, specifically last March! Species: Cretalamna maroccana (Arambourg, 1935) Size: 2.5 tall, ~3.0 cm long Age: 72-66 mya (Late Cretaceous, Maastrichtian) Origin: Ouled Abdoun basin (Morocco) About this fossil: a nicely preserverd shark tooth, with only a small hole on the front part of the tooth's root; I especially appreciate the two lateral cusplets, which are extremely nice to admire. Definitely one of my favorites!- 8 replies
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- chondrichthyes
- cretaceous
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I stumbled upon a small patch of Warsaw Formation limestone and found a couple of cool Chondrichthyes teeth. Both teeth were unfortunately cracked/ split in the matrix, and the tough limestone bedrock made removal tricky. The smaller tooth looks like Cladodont of some sort. I can't ID or recognize the bigger toothplate, and was curious if anyone has possibly seen one similar?
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- chondrichthyes
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Over the last two years I have been able to collect a small but diverse group of shark and other chondrichthyan teeth from Pennsylvanian deposits in Illinois. Actually, all but one of the teeth are from one exposure of the La Salle Limestone of the Bond Formation- the other tooth was found in some roadside rip rap limestone in Central Illinois which seems to share many species with the La Salle, but unfortunately I have no way of determining the exact origin. Here is the first tooth, this is the one collected from rip rap in northern Champaign County. It is a cladodont type tooth, although unfortunately most of the main tooth and some of the cusps are missing. The tooth is 15 mm across at the widest point.
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- illinois
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From the album: Pennsylvanian fossils
Phylum: Chordata Class: Chondrichthyes Order: Petalodontidae Family: Pristodontidae Genus: Peripristis-
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- chondrichthyes
- deer creek formation
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I found this tooth and part of it that snapped off along some spoil piles. There is no root, and I believe it is the labial view of the tooth surface exposed. The stone comes from the Deer Creek Formation, Ervine Creek Member. I believe it is a Petalodont, possibly Harpacodus?
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- chondrichthyes
- petalodont
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From the album: My collection in progress
Rhombodus binkhorsti Dames 1881 Location: Morocco Age: 72-66 Mya (Maastrichtian, Upper Cretaceous) Measurements: 1,8x2,8 cm Kingdom: Animalia Phylum: Chordata Subphylum: Vertebrata Class: Chondrichthyes Subclass: Elasmobranchi Superorder: Batoidea Order: Rajiformes Family: Rhombodontidae-
- batoidea
- chondrichthyes
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From the album: My collection in progress
Cretalamna biauriculata Wanner 1902 Location: Morocco Age: 72-66 Mya (Maastrichtian, Upper Cretaceous) Measurements: 1,8x2,8 cm Kingdom: Animalia Phylum: Chordata Subphylum: Vertebrata Class: Chondrichthyes Subclass: Elasmobranchi Superorder: Selachimorpha Order: Lamniformes Family: Otodontidae-
- chondrichthyes
- cretaceous
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From the album: My collection in progress
Striatolamia macrota Agassiz 1843 Location: Morocco Age: 56-48 Mya (Ypresian, Eocene, Paleogene) Measurements: 1,8x2,8 cm Kingdom: Animalia Phylum: Chordata Subphylum: Vertebrata Class: Chondrichthyes Subclass: Elasmobranchi Superorder: Selachimorpha Order: Lamniformes Family: Odontaspididae-
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- elasmobranchi
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From the album: My collection in progress
Squalicorax pristodontus Agassiz 1843 Location: Morocco Age: 72-66 Mya (Maastrichtian, Upper Cretaceous) Measurements: 2,5x1,5 cm Kingdom: Animalia Phylum: Chordata Subphylum: Vertebrata Class: Chondrichthyes Subclass: Elasmobranchi Superorder: Selachimorpha Order: Lamniformes Family: Anacoracidae-
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- chondrichthyes
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From the album: Muncie Creek Shale Phosphatic Nodules
Currently being donated and Identified. Will update on this specimen if this is a new species and its identification.-
- braicase
- chondrichthyes
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From the album: Muncie Creek Shale Phosphatic Nodules
The second half of the cartilage pterygiophores When breaking the concretion most of the internal structure was unfortunately damaged-
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- chondrichthyes
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From the album: Muncie Creek Shale Phosphatic Nodules
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- cartilage
- chondrichthyes
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From the album: Muncie Creek Shale Phosphatic Nodules
Currently being donated and Identified. Will update on this specimen if this is a new species and its identification.-
- braincase
- chondrichthyes
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This tooth was labeled as Orodus but I wanted to get some other opinions. I see quite a few different Paleozoic tooth morphologies that are called Orodus which can be a little confusing. I am not saying the Orodus ID is incorrect but I see some things that remind me of a Hybodontiformes tooth. Burlington Limestone Biggsville Quarry Biggsville, Illinois The tooth measures 5mm across.
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- burlington limestone
- chondrichthyes
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L1: 7.6 cm L2: 6.2 cm W: 6.0 cm
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- cenozoic
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I know very little about shark teeth. I found this one a while back in Pennsylvanian (Desmoinesian) shale in northeastern Oklahoma. I am speculating this may be deltodus only because I see a nearly identical tooth labeled as deltodus on another website. The fossil is very thin (too thin to photograph the edges). Besides confirming the taxonomy, can anyone tell me which surface of the tooth is shown in Side A? Finally, would you say Side B is mainly matrix (other than the edges)? I think matrix is showing through the cracks on Side A, and that may be the only thing holding the fossil together. My wife recently got me a camera, so I am working on a gallery album in the forum. I would like to make sure I have the IDs correct before I post photos in the album, so you may be seeing several ID requests from me over the next weeks. Best wishes
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- chondrichthyes
- deltodus
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From the album: Chondrichthyan Teeth From The Pennsylvanian Period
The more flattened version and 3 extra fragments from another Petalodus-
- cartilaginous fish
- chondrichthyes
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From the album: Chondrichthyan Teeth From The Pennsylvanian Period
A few Petalodus teeth fragments I have found-
- chondrichthyes
- fragments
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Help request! I am putting together a tool for judging rock age based on very crude, whole-rock, hand-sample observations of fossil faunas/floras -- the types of observations a child or beginner could successfully make. I view this as a complement to the very fine, species-level identifications commonly employed as index fossils for individual stages, biozones, etc. Attached is what I've got so far, but I can clearly use help with corals, mollusks, plants, vertebrates, ichnofossils, and the post-Paleozoic In the attached file, vibrant orange indicates times in earth history to commonly observe the item of interest; paler orange indicates times in earth history to less commonly observe the item of interest. White indicates very little to no practical probability of observing the item of interest. Please keep in mind that the listed indicators are things like “conspicuous horn corals,” purposefully declining to address rare encounters with groups of low preservation potential, low recognizability, etc. Got additions/amendments, especially for the groups mentioned above? Toss them in the comments below! Thank you..... https://docs.google.com/spreadsheets/d/1tVm_u6v573V4NACrdebb_1OsBEAz60dS1m4pCTckgyA
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- algae
- ammonoidea
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- algae
- ammonoidea
- arthropoda
- biostratigraphy
- brachiopoda
- bryozoa
- cambrian
- carboniferous
- cephalopoda
- chitinozoa
- chondrichthyes
- cnidaria
- cretaceous
- crinoidea
- crustacea
- devonian
- diatoms
- echinodermata
- echinoid
- eocene
- fish
- foraminifera
- gastropoda
- ichnology
- invertebrates
- jurassic
- microfossils
- miocene
- mississippian
- mollusca
- neogene
- oligocene
- ordovician
- ostracoda
- paleocene
- paleogene
- pelecypoda
- pennsylvanian
- permian
- plants
- pleistocene
- pliocene
- radiolaria
- sharks
- silurian
- tetrapoda
- triassic
- trilobita
- vertebrates
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Red Hill is a site I first went to 10 years ago with my son, Ian who was 10 at the time. It is a very deep road cut into the uppermost part of the Catskill Formation representing a late Fammenian river system that was draining the Acadian mountains to the east and emptying into the inland sea in western PA and OH. It is one of a handful of sites in the world where Devonian tetrapods have been found. The site has fossil layers in both channel margin (red layers) and flood plain (gray-green layers) facies. While it is an active research site and groups go there under the understanding that anything of scientific importance will be donated to the museum, there is a lot there that is redundant in the collections and we've been able to retain. In 2014, Ian found an exceptionally preserved moderately large osteolepiform, Hyneria (Tristichopteridae). Some of the material went into the re-description of Hyneria, much we have been allowed to take home. Since then the project has expanded to a search for more tetrapod material using the jackhammer and generator the museum purchased. This may require multiple posts. I'll start with the jaws recovered over 2014/15 seasons. This lens containing most of the head from apparently a single individual. Here Ian is working with Ted Daeschler and Doug Rowe (site manager) of the Academy Of Natural Sciences in Philadelphia. Here are some images of the jaw material after removal and after prep by Fred Mullison of the ANSP. Lower left jaw after removal. This is the lower right jaw (right) and the vomer and very impressive fang. Amazingly, in 2016, we went back. I was leading a trip for DVPS. Ian found this amazing but poorly prepped jaw (I did this one). Here are a pair of cleithrums, about 29 cm long. The attachments for the scapulocoracoid are clearly visible between 17 and 21 cm. Here is part of the parietal shield. More to follow.
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- acanthodii
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Hello, I am looking for help identifying a specimen collected during field work for my dissertation. The piece was collected from the Lower Oxford Clay (jason zone) in Peterborough, Cambs. I suspect that it is Ischyodus egertoni, but am not positive whatsoever! Any thoughts would be appreciated Cheers, Jacob.