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Showing results for tags '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,
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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. -
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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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From the album: Muncie Creek Shale Phosphatic Nodules
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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. -
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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Can someone please give me a few scanned pages from Capetta 1987 book ("Handbook on paleoichthyology: chondrichthyes II: Mesozoic & Cenozoic Elasmobranchii" Volume 3E Teeth). I am in India at present and desperately in need of the book basically for Hybodont dentition (Mesozoic) mostly Asteracanthus (strophodus) sp, Hybodus, planohybodus, spenodus, meristodonoides and edaphodon sp. the book is not available anywhere; not even in library. Very expensive, can't buy from abroad. Please help me guys, atleast you may have access to some good library having the book.
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L1: 7.6 cm L2: 6.2 cm W: 6.0 cm
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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.
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From the album: Chondrichthyan Teeth From The Pennsylvanian Period
The more flattened version and 3 extra fragments from another Petalodus -
From the album: Chondrichthyan Teeth From The Pennsylvanian Period
A few Petalodus teeth fragments I have found -
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 com- 5 replies
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- biostratigraphy
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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 anyth
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A new publication explores the transition between C. chubtensis and C. megalodon, loss of cusplets Please note the following statement about lineage by some very influential authors: "we do not feel that the transition from angustidens to chubutensis is as marked as suggested by Cappetta (2012), given that the lineage represents a chronospecies with very gradual morphological change through time. As such, we choose to maintain a single genus for all serrated forms, given that they are easily distinguished from Otodus obliquus, and use the genus Carcharocles for subsequent taxa
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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.
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These are a few of the pdf files (and a few Microsoft Word documents) that I've accumulated in my web browsing. MOST of these are hyperlinked to their source. If you want one that is not hyperlinked or if the link isn't working, e-mail me at joegallo1954@gmail.com and I'll be happy to send it to you. Please note that this list will be updated continuously as I find more available resources. All of these files are freely available on the Internet so there should be no copyright issues. Articles with author names in RED are new additions since March 22, 2018
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- elasmobranch
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Johnson/2003Mitt.Mus.NaturkBerl., Geowiss. Reihe 6 (2003) 125-160 Nature of the beast (pun intended): taxonomical (systematic) Monograph " Dentitions of Barbclabomia (new genus, Chondrichthyes: Xenacanthiformes) from the Upper Palaeozoic of North America Gary D. Johnson' With 14 figures and 3 tables recommended, particularly for those interested in xenacanthids, orthacanthids, etc About 5 Mb Abstract Barbclabornia luedersensis (Berman, 1970) is defined on the basis of small (2 111117 high) isolated teeth that lack an intermediate cusp. It is k
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Giuseppe Marramà , Kerin M. Claeson, Giorgio Carnevale & Jürgen Kriwet(about 4 Mb) (2018) Revision of Eocene electric rays (Torpediniformes, Batomorphii) from the Bolca Konservat- Lagerstätte, Italy, reveals the first fossil embryo insitu in marine batoids and provides new insights into the origin of trophic novelties in coral reef fishes, Journal of Systematic Palaeontology, 16:14, 1189-1219, DOI: 10.1080/14772019.2017.1371257 Sensitive people should beware of figs. 15 and 16 I resisted the temptation (lover of classic photography) to work Man Ray in there somewhere
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- vertebrates
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awesom 11,3 Mb I just received a postcard from my retinae:"enjoying the Bahamas,won't be back anytime soon,you &*&(((()_+&@W" "And you may tell yourself :"This is not my beautiful fossil""
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- selachii
- exceptional preservation
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I can't identificate it. I found it at marine sandstone from Paleogene. Also, do somebody has a handbook about chondrichthyes of Cappetta 2012 in PDF?
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EHRET_al-2012-Palaeontology.pdf
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- elasmobranch
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After this horrendous attempt at a triple pun,things can only deteriorate,right? The list of species in the tags i have kept to a bare bones minimum,for clarity's sake i MIGHT not have posted this,but it figures tooth rows. Shark cognoscendi prolly already have this one(and the others by Bass)I'm sure. SO,no need to post those others orrep38a.pdf
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big the name says it all: it IS big
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- biology
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Just guessing this hasn't been posted yet.... Enjoy,well illustrated account shark
