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Showing results for tags 'helicoprion'.
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The Chondricthyans (including the sharks and rays) have been around and keeping the ocean's ecosystems healthy for about 420 Million Years. Today, in celebration of this, I've decided to do a little fun post and list the eight times in Earth's history truly massive chondricthyans have emerged. Hope you all enjoy!!! The First is the Devonian, where there is at least one confirmed fossil (CMNH 5238) of a large currently unnamed Ctenacanthiform shark that reached lengths of 4.2-5 meters (13-16 feet) in length. https://www.mdpi.com/1424-2818/15/3/318 The
What caused the decline of the Eugeneodontids - (Buzz saw sharks)
Joseph Fossil posted a topic in Questions & AnswersI've been fascinated with the Eugeneodontids (the buzz-saw chondrichthyans) and how they managed to practically become the apex predators of most oceanic environments from the Carboniferous to the Permian with famous members like Edestus and Helicoprion. Two genus of this extraordinary group even survived the Permian-Triassic Extinction 252 Million Years ago - Fadenia and Caseodus! http://www.fossilworks.org/cgi-bin/bridge.pl?a=taxonInfo&taxon_no=34456 http://www.fossilworks.org/cgi-bin/bridge.pl?a=taxonInfo&taxon_no=34451 But by the Olenekian stage
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.
Found this fossil. But what is it?
RedHeadWelder posted a topic in Fossil IDIt's not a big fossil. My hubby and I think it's a buzzsaw shark tooth. Anyway, we can't figure out what kind of buzzsaw shark it's from or if it's even that kind of fossil. It looks like a doll shoe, but it is a fossil. Any help would be appreciated.
I Would Just Like To Say...
Jesse posted a topic in General Fossil Discussionthat Helicoprion is one crazy animal with a very interesting history! 3 years of research and we are still learning something new about them all the time. It is interesting that for as little is known about them there are over 60 publications about the genus. For your reading pleasure I present a story of research, madness, forced labor camps, and execution. All in the pursuit of this enigmatic shark! http://www.g-to-g.co...ilter=repressed
Helicoprion Shark Fossil?
Sparki2122 posted a topic in Fossil IDGood afternoon, I would like to start off with saying that I know very little about fossils and Geology so please excuse me if I make any errors or misstatements. Recently I purchased approximately 10 cubic yards of rock from a local business to use for landscaping around my property. The business has claimed that the rocks they sold me were excavated from in or near the banks of the Snake River in Southern Idaho. I unfortunately do not have a more exact location but I would be willing to possibly follow up with the business if more information is needed. With the help of some friends we
Jesse posted a topic in Fossil IDI am having trouble nailing down what exactly this fossil is and would appreciate some help. It is from the Phosphoria formation (270 ma), and was found on a horizon of low grade phosphate that was roughly 20x10 feet. The gentleman who found the fossil said it was covering the horizon and that there were 20-30 3 inch diameter tooth whorls as well! So this material is supposedly associated with helicoprion fossils. The picture is the fossil as is, the guy that collected it POURED shellac over the entire surface The blue tinted 3d model is what I built today based on a surface scan of the ro
Helicoprion Mystery Solved!
Jesse posted a topic in General Fossil Discussionhttp://phenomena.nationalgeographic.com/2013/02/26/buzzsaw-jaw-helicoprion-was-a-freaky-ratfish/ http://www2.isu.edu/headlines/?p=4270 After many years and many promises, here it is, hot off the presses!
The Tucson Fossil Shows 2012: One Collector's Report
siteseer posted a topic in General Fossil DiscussionThe various gem-mineral-fossil shows that are collectively known as "The Tucson Show" ended last Sunday. Many people consider the official end to be the close of the main show at the convention center but many dealers are long gone by then at the other shows. I've been going to the Tucson shows since 1989 with some missed years in the early 2000's. I've seen established shows disappear or change venue with even the names of the venues changing two or three times. The town had seemed to deteriorate over time, but this year, Tucson looked a little clear - perhaps because construction on the