ThePhysicist Posted August 15, 2021 Share Posted August 15, 2021 (edited) Hi y'all, I picked these shark teeth up from a local rock shop. The first is definitely a symphyseal/parasymphyseal tooth but I'm not sure if it's from an Eocene Parotodus or Otodus. I lean towards Parotodus because of the narrow crown and its significant curvature. The second I think is a Cretolamna biauriculata. The symphyseal is about an inch ~ 2 cm in length. @siteseer@Al Dente@MarcoSr@Untitled Parotodus sp.?: Cretolamna biauriculata?: Edited August 15, 2021 by ThePhysicist "Argumentation cannot suffice for the discovery of new work, since the subtlety of Nature is greater many times than the subtlety of argument." - Carl Sagan "I was born not knowing and have had only a little time to change that here and there." - Richard Feynman Collections: Hell Creek Microsite | Hell Creek/Lance | Dinosaurs | Sharks | Squamates | Post Oak Creek | North Sulphur River | Lee Creek | Aguja | Permian | Devonian | Triassic | Harding Sandstone Instagram: @thephysicist_tff Link to comment Share on other sites More sharing options...
Praefectus Posted August 15, 2021 Share Posted August 15, 2021 First tooth is interesting. Not 100% sure what it is. I agree on the second tooth Serratolamna maroccana (Cretolamna biauriculata). 1 Link to comment Share on other sites More sharing options...
MarcoSr Posted August 15, 2021 Share Posted August 15, 2021 10 hours ago, ThePhysicist said: Hi y'all, I picked these shark teeth up from a local rock shop. The first is definitely a symphyseal/parasymphyseal tooth but I'm not sure if it's from an Eocene Parotodus or Otodus. I lean towards Parotodus because of the narrow crown and its significant curvature. The second I think is a Cretolamna biauriculata. The symphyseal is about an inch ~ 2 cm in length. @siteseer@Al Dente@MarcoSr@Untitled Parotodus sp.?: The first tooth is an Otodus symphyseal/parasymphyseal tooth. At 2 cm, it is too large to be Parotodus, in my opinion. There is a lot of feature variability in these symphyseal/parasymphyseal teeth. Marco Sr. 1 "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...
MarcoSr Posted August 16, 2021 Share Posted August 16, 2021 23 hours ago, MarcoSr said: The first tooth is an Otodus symphyseal/parasymphyseal tooth. At 2 cm, it is too large to be an Eocene Parotodus, in my opinion. There is a lot of feature variability in these symphyseal/parasymphyseal teeth. 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...
siteseer Posted August 18, 2021 Share Posted August 18, 2021 On 8/15/2021 at 3:47 AM, MarcoSr said: The first tooth is an Otodus symphyseal/parasymphyseal tooth. At 2 cm, it is too large to be Parotodus, in my opinion. There is a lot of feature variability in these symphyseal/parasymphyseal teeth. Marco Sr. Hi Marco Sr., I agree. The Parotodus teeth of that age (early Eocene) I've seen have been small. In fact, they were about 2cm high. Their parasymphyseal teeth would be very small (maybe around 5mm?) Jess 1 Link to comment Share on other sites More sharing options...
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