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Showing results for tags 'chimaera'.
Found 11 results
Ischyodus sp. Spine
EPIKLULSXDDDDD posted a gallery image in Members Gallery
From the album: Ozan FormationIschyodus sp., NSR Campanian, Cretaceous Mar, 2023 Not a common find for the NSR.
Californian Helicoprion information
DardS8Br posted a topic in General Fossil DiscussionAnyone know anything about Californian Helicoprion fossils? I know they’ve been found in Eastern California, but that’s about it and I’d like to learn more.
Elasmodectes avitus (VON MEYER, 1862)
oilshale posted a fossil in Sharks & RaysVon Mayer originally described this chimaera under the name Ischyodus avitus. Elasmodectes avitus, a cartilaginous fish, is conspicuous for its sparsely ossified skeleton. There is a nuchal spine behind the head; the dorsal fin begins just behind the nuchal spine and extends to the tail. Elasmodectes seems to have possessed a skin or only very thin scales, which seems to be almost impossible to preserve. The Skull is presenting its dosal view. Reverence: WOODWARD, A.S. (1891) Catalogue of the fossil fishes in the British Museum (Natural History). Part II. containi
Piece of coral or Chimaera tooth plate?
MarcoSr posted a topic in Fossil IDI recently found this 9mm by 7mm specimen in matrix from the Eocene Nanjemoy Formatiion of Virginia. I think it is a piece of a Chimaera tooth plate. However, in collecting the Nanjemoy Formation in Virginia for over twenty years I have never found a Chimaera tooth plate or a fragment of one. For that reason I don't want to rule out a coral fragment. However, I haven't found a piece of coral in this formation before either. For comparison, a Chimaera tooth plate (25mm by 16mm) from the Paleocene Aquia Formation of Maryland:
Hasle Beach - Bornholm, Denmark (Mid Jurassic fossils)
Sauroniops posted a topic in Fossil Hunting TripsHello there fossil forum! This post will actually contain some of my finds from 2 trips to the same location, namely the island of Bornholm in Denmark. I went there this summer, and made quite an interesting discovery, which I will get back to, and then went on yet another trip, which I got home from less than a week ago. I doubt many of you know about it, unless you're Danish or have an interest in the geology of Denmark, but most of Denmark was underwater for pretty much all of the Mesozoic era. That is, of course, with the exception of Bornholm, which is a geologist's/paleo
Chimaera dental plate?
sjaak posted a topic in Fossil IDCould this be a chimaera or rather Ischyodus dental plate? Upper Jurassic of Boulonnais, North of France.
Elasmodectes avitus VON MEYER, 1862 - a long-nosed chimaera
oilshale posted a gallery image in Members Gallery
From the album: VertebratesElasmodectes avitus VON MEYER, 1862 a Rhinochimaeridae - a long-nosed chimaera Late Jurassic Tithonian Painten Bavaria Germany Elasmodectes reconstruction
? Chimaeroid fin spine from North Sulphur River, TX
bluefish1766 posted a topic in Fossil IDHi all. My kids and I were hunting in the North Sulphur River today and we found this long, spine-like fossil with a double row of tooth-like structures. I have been searching on the web and think that it may be a fin spine of a chimaeroid; however, I want to see what others think. The reasons for my thinking this is that the double row of tooth-like projections are evenly and tightly spaced and that the projections are aligned between the rows. The projections do not look like they are teeth (I see no tooth sockets) and are curved. Also, there is a faint groove between the doub
Anomotodon posted a gallery image in Members Gallery
Heteropetalus elegantulus Lund, 1977
oilshale posted a fossil in Sharks & RaysTaken from Lund, Richard, and Grogan, E.D., 2005, Bear Gulch web site, www.sju.edu/research/bear_gulch, 14/11/2016, page last updated 2/1/2006: "Heteropetalus elegantulus is an elegantly slim little euchondrocephalan with many different tooth shapes along its jaws. It ranges to only about 4 inches in length. Skull, jaws, and dentition place it close to Debeerius. It is common in the weedier shallow water areas. http://people.sju.edu/~egrogan/BearGulch/images_fish_art/Hetelegantulus_duo.jpg Male (top) and female (bottom). There are no scales, except for
Echinochimaera meltoni Lund, 1977
oilshale posted a fossil in Sharks & RaysA modern Ratfish, Bischoff Island, British Columbia, Canada (from Wikipedia: Clark Anderson/Aquaimages) Lit.: Grogan, E. Lund, R. 2002: The geological and biological environment of the Bear Gulch Limestone (Mississippian of Montana, USA) and a model for its deposition. Geodiversitas 2002, 24 (2): 296-315 Lund, R. 1977 - Echinochimaera meltoni new genus and species (Chimaeriformes), from the Mississippian of Montana. Annals of Carnegie Museum, 46 (13): 195-221. Hagadorn, J.: Bear Gulch: An exceptional Upper Carboniferous Plattenkalk