terminatordiego Posted November 7, 2021 Share Posted November 7, 2021 (edited) Hello to all of you guys, a couple of weeks before i asked for help in relation with some shark teeth, and the help indeed was very nice! A couple days before i was back in field trip and found some more teeth from the same strata, and would need your help for the correct ID (hopefully at species or genus level), you guys are awesome!!! Here´s the list of the fossils (each step of the ruler is 2mm): 1) A tiny tooth with very small roots and 3 denticles, the central and main one is triangular and very oblicuous 2) A tooth with very triangular cusplets and with small and shorts ridges in the base of the main denticle (wich is slightly curved), the roots are slightly asymmetrical 3) A half of tooth with triangular cusplets and with a slight triangular depression in the base of the main denticle (wich is slightly curved) 4) A (i think so) stingray tail fossill 5) A tooth that i dont know what could be (the tip is very smooth and the roots have a wood-like texture) 6) A tooth that i think is from Premontreia subulidens, but im not 100% sure 7) Something that i dont know what it is, looks like some kind of skin or membrane 8) A tooth similar in color and root texture that number 5, but with only 1 denticle 9) A tooth with very triangular cusplets and low developed roots 10) A tooth with maybe similar look about Carcharias teretidens? but with slightly longer lateral denticles 11) A tooth with aparently only one denticle, and asymmetrical roots (the rightest part of the right root is easly confused with the sandstone matrix) 12) A tooth with two denticles, striae in the lingual face, triangular depression in the base of the main denticle and the base of the crown is much more prominent that the diameter of the main denticle, might be reworked because is from a level stratigraphically higher. Finally, as a bonus track, here it is a vert. that i found in the same field trip: Edited November 7, 2021 by terminatordiego Link to comment Share on other sites More sharing options...
bthemoose Posted November 7, 2021 Share Posted November 7, 2021 #1 looks like an extreme posterior tooth -- maybe Cretalamna sp.? #4 looks like a ray spine to me as well -- cool piece! #8 looks like a (para-)symphyseal tooth, perhaps from a sand tiger. Link to comment Share on other sites More sharing options...
terminatordiego Posted November 7, 2021 Author Share Posted November 7, 2021 7 minutes ago, bthemoose said: #1 looks like an extreme posterior tooth -- maybe Cretalamna sp.? #4 looks like a ray spine to me as well -- cool piece! #8 looks like a (para-)symphyseal tooth, perhaps from a sand tiger. thanks!!!!! and yes, the ray spine is very nice!!! Link to comment Share on other sites More sharing options...
bthemoose Posted November 7, 2021 Share Posted November 7, 2021 Have you found Otodus obliquus teeth at this Paleocene deposit? Link to comment Share on other sites More sharing options...
terminatordiego Posted November 7, 2021 Author Share Posted November 7, 2021 (edited) 23 minutes ago, bthemoose said: Have you found Otodus obliquus teeth at this Paleocene deposit? No, i havent, aparently the nearest I´ve found is cretolamna sp. (the tiny thing above) Edited November 7, 2021 by terminatordiego 1 Link to comment Share on other sites More sharing options...
terminatordiego Posted November 8, 2021 Author Share Posted November 8, 2021 I just realized that the #9 was a partially exposed symphyseal tooth, here the images of the tooth (sadly the lateral denticle was broken during matrix extraction) here the images: Also would be very helpfull if any of you guys who helped me before (thanks a lot) with paleocene sharks, know something about these 12 fossils @will stevenson and @MarcoSr Link to comment Share on other sites More sharing options...
MarcoSr Posted November 8, 2021 Share Posted November 8, 2021 7 hours ago, terminatordiego said: I just realized that the #9 was a partially exposed symphyseal tooth, here the images of the tooth (sadly the lateral denticle was broken during matrix extraction) here the images: Also would be very helpfull if any of you guys who helped me before (thanks a lot) with paleocene sharks, know something about these 12 fossils @will stevenson and @MarcoSr I agree that 8 looks like a sand tiger symphyseal tooth. This tooth doesn't look like a symphyseal tooth to me. From the root it looks like Scyliorhinidae, maybe Scyliorhinus sp. Not knowing the fauna I really can't ID the other sand tiger teeth. There are just too many Paleocene sand tiger species that look too similar. 4 is a stingray barb. 7 looks like it is from a fish. Can't say more from the picture. 1 maybe Cretalamna sp. Some species have double cusplets. Marco Sr. "Any day that you can fossil hunt is a great day." My family fossil website Some Of My Shark, Ray, Fish And Other Micros My Extant Shark Jaw Collection Link to comment Share on other sites More sharing options...
terminatordiego Posted November 8, 2021 Author Share Posted November 8, 2021 6 hours ago, MarcoSr said: I agree that 8 looks like a sand tiger symphyseal tooth. This tooth doesn't look like a symphyseal tooth to me. From the root it looks like Scyliorhinidae, maybe Scyliorhinus sp. Not knowing the fauna I really can't ID the other sand tiger teeth. There are just too many Paleocene sand tiger species that look too similar. 4 is a stingray barb. 7 looks like it is from a fish. Can't say more from the picture. 1 maybe Cretalamna sp. Some species have double cusplets. Marco Sr. oh, I see it now Thanks a lot Marco!!! You guys are awesome!!! Link to comment Share on other sites More sharing options...
Notidanodon Posted November 8, 2021 Share Posted November 8, 2021 I’d say 1.striatolamia striata 2. Hypotodus sp. 3. Unsure 4.yes sting Ray barb 5.carcharias 6.pachyscyllium? 7.? 8.symphaeseal 9.striatolamia striata 10. Carcharias 11.striatolamia striata 12. Striatolamia striata its worth noting that some of these teeth don’t look like paleocene species Link to comment Share on other sites More sharing options...
terminatordiego Posted November 8, 2021 Author Share Posted November 8, 2021 31 minutes ago, will stevenson said: I’d say 1.striatolamia striata 2. Hypotodus sp. 3. Unsure 4.yes sting Ray barb 5.carcharias 6.pachyscyllium? 7.? 8.symphaeseal 9.striatolamia striata 10. Carcharias 11.striatolamia striata 12. Striatolamia striata its worth noting that some of these teeth don’t look like paleocene species Thank you so much Will !!! Link to comment Share on other sites More sharing options...
Notidanodon Posted November 8, 2021 Share Posted November 8, 2021 22 minutes ago, terminatordiego said: Thank you so much Will !!! No problem 1 Link to comment Share on other sites More sharing options...
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