ebrocklds Posted December 21, 2007 Share Posted December 21, 2007 here are a few teeth from argentina that i need identified. they are eocene possibly patagonico formation. if anyone can help me i would appreciate it. thanks brock Link to comment Share on other sites More sharing options...
ebrocklds Posted December 21, 2007 Author Share Posted December 21, 2007 a few more from argentina odontaspis cuspidata? (below) i found this in a really old argentine geology book is it correct? some from morocco. cretaceous. unknow formation. the same one with the mosasaurs. and a couple from texas. do these look familiar dan? south bosque formation, texas. cretaceous Link to comment Share on other sites More sharing options...
Northern Sharks Posted December 21, 2007 Share Posted December 21, 2007 I'll start by saying that any teeth I know of from Argentina are early miocene. Your first pic looks like a mako, but if it had cusps that were broken off, obviously not. At least some of the ones with cusps are Carcharoides catticus if unserrated and C. totuserratus if they have fine serrations (more like wrinkles really). The last photo in your first post looks like a lower jaw symphyseal (center) tooth from a cow shark (Hexanchus?). The 2 tiger shark teeth under the penny are likely Galeocerdo aduncas. Your Moroccan teeth,clockwise from the top: probably Enchodus libycus (fish),Squalicorax pristodontis, at 6 o'clock is it broken? If not, maybe a posterior Squalicorax. At 9 o'clock is Cretolamna biauriculata maroccana. The texas teeth are also Squalicorax, probably falcatus. Hope this helps. There's no limit to what you can accomplish when you're supposed to be doing something else Link to comment Share on other sites More sharing options...
Uncle Siphuncle Posted December 21, 2007 Share Posted December 21, 2007 The South Bosque teeth are S. falcatus. This formation is exposed intermittently between the type locality just south of Waco on down south of Austin. This formation has given up most of my shark teeth from the Eagle Ford group. Collecting this formation generally is done by finding a thin glauconitc shell hash layer sandwiched between thick limestone overburden in a creek, then beating the overburden into submission with a 20 LB sledge and mining the glauconite. Often hundreds of teeth per day can be found if you find a good site. Cretoxyrhina, Cretolamna, Enchodus, Pachyrhizodus, and Ptychodus teeth can be found alongside the Squalis, as can Coniasaurus and turtle material and shark/fish verts. Grüße, Daniel A. Wöhr aus Südtexas "To the motivated go the spoils." Link to comment Share on other sites More sharing options...
ebrocklds Posted December 21, 2007 Author Share Posted December 21, 2007 northern they could very well be miocene. i got that age from an old and not so detailed geologic map. the area where they were found has both tertiary and quaternary sediments exposed. they are from the outskirts of the city of Trelew. whales, penguins, dolphins and marine mammals also can be found in the same general area. brock Link to comment Share on other sites More sharing options...
Harry Pristis Posted December 21, 2007 Share Posted December 21, 2007 <snip> Your Moroccan teeth,clockwise from the top: probably Enchodus libycus (fish),Squalicorax pristodontis, at 6 o'clock is it broken? If not, maybe a posterior Squalicorax. At 9 o'clock is Cretolamna biauriculata maroccana. The texas teeth are also Squalicorax, probably falcatus. Hope this helps. Brock . . . The last Moroccan tooth, the ray tooth, is similar to one in my collection which is labeled: Family Rhombodontidae Cappetta 1987 Rhombodus binkhorsti Late K (Maestrichtian) I see that this extinct family of rays occurs in the Maestrichtian of Texas, and is illustrated in the Welton & Farish book. ------Harry Pristis http://pristis.wix.com/the-demijohn-page What seest thou else In the dark backward and abysm of time? ---Shakespeare, The Tempest Link to comment Share on other sites More sharing options...
Northern Sharks Posted December 21, 2007 Share Posted December 21, 2007 Brock . . .The last Moroccan tooth, the ray tooth, is similar to one in my collection which is labeled: Family Rhombodontidae Cappetta 1987 Rhombodus binkhorsti Late K (Maestrichtian) I see that this extinct family of rays occurs in the Maestrichtian of Texas, and is illustrated in the Welton & Farish book. ------Harry Pristis Looks like you nailed it Harry. I don't know my rays that well and the only time I'd seen a photo of that species, it was a shot of the base. The base basically looks like 2 triangles that are mirrored about the nutrient groove. Ya learn somethin new every day. There's no limit to what you can accomplish when you're supposed to be doing something else Link to comment Share on other sites More sharing options...
ebrocklds Posted December 21, 2007 Author Share Posted December 21, 2007 thanks guys. i think i got most all of them identified now. the next round will be ecinoids. but i will save that for another day. brock Link to comment Share on other sites More sharing options...
Uncle Siphuncle Posted December 22, 2007 Share Posted December 22, 2007 Coincidentally, I'll probably be bumping into some R. binkhorsti in the Escondido fm of South TX tomorrow. They co-occur with Squalicorax pristodontus, Serratolamna serrata, Ginglymostoma lehneri, and a few others. Serratolamna tends to dominate the take in this formation and all the teeth tend to be heavily reworked, many missing cusplets. Should be a shindig anyhow, with some exploratory creeks in other Upper K formations to round out the day. Bring on the echinoids. I'm best at the Cretaceous varieties. Grüße, Daniel A. Wöhr aus Südtexas "To the motivated go the spoils." Link to comment Share on other sites More sharing options...
ebrocklds Posted December 22, 2007 Author Share Posted December 22, 2007 dan, i sure hope you can help me id alot of the echies as you found most of them i also have afew that i have aquired elswere that i need help with. maybe tomarrow i will start a new thread. i am pretty busy molding the ceratosaur skull i posted earlier. brock Link to comment Share on other sites More sharing options...
Harry Pristis Posted December 22, 2007 Share Posted December 22, 2007 Looks like you nailed it Harry. I don't know my rays that well and the only time I'd seen a photo of that species, it was a shot of the base. The base basically looks like 2 triangles that are mirrored about the nutrient groove. Ya learn somethin new every day. Well, we both learned something then (me, more than you, I suspect). I didn't know what these Moroccan shark teeth were until you id'ed Brock's tooth. I spent some time rummaging through my accumulations, and I found these among some other small teeth. -----Harry Pristis http://pristis.wix.com/the-demijohn-page What seest thou else In the dark backward and abysm of time? ---Shakespeare, The Tempest Link to comment Share on other sites More sharing options...
steve71 Posted December 22, 2007 Share Posted December 22, 2007 SOME FOSSILS ONES HERE JUST ALOT SMALLER.VERY VERY SMALL FOSSILIZED SHARK TEETH FOUND IN TEXAS.NOT EVERTHING SO BIG Link to comment Share on other sites More sharing options...
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