Fossils found in Post Oak Creek, and in nearby creeks in Sherman, TX.
The Cretaceous fossils are washed out of the Eagle Ford Group (~ 90 Ma), and mammal material from the Pleistocene or younger.
Vertebrate Faunal List (work in progress):
Rarity (purely subjective):
Abundant, Common, Uncommon, Rare, Ultra-Rare
Sharks:
Cantioscyllium sp. ('bamboo shark')*
- Cantioscyllium decipiens
Chiloscyllium sp. ('bamboo shark')*
- Chiloscyllium greeni
Cretodus sp.
Cretorectolobus sp. ('carpet shark)*
Cretalamna sp.
Cretoxyrhina sp. ('ginsu shark')
- Cretoxyrhina mantelli
?Galeorhinus sp. ('tope shark')*
cf. Ginglymostoma sp. ('nurse shark')*
Lonchidion sp. ('Hybodont shark')*
Meristodonoides sp. ('Hybodont shark')*
Pseudocorax sp. ('False-crow shark')
Ptychodus spp. ('crusher shark')
- Ptychodus anonymus
- Ptychodus atcoensis
- Ptychodus mortoni
- Ptychodus whipplei
Scapanorhynchus spp. ('goblin shark')
- Scapanorhynchus raphiodon
- Scapanorhynchus texanus
Squalicorax spp. ('crow shark')
- Squalicorax falcatus
- Squalicorax kaupi
Fish:
Amiidae indet.*
Enchodus sp. ('saber-toothed herring')*
Ischyrhiza sp. ('sawskate')*
Pseudohypolophus sp. ('guitarfish')*
- Pseudohypolophus mcnultyi
Ptychotrygon spp. ('sawskate')*
- Ptychotrygon slaughteri
- Ptychotrygon texana
- Ptychotrygon triangularis
Pyncodontiformes
Rhinobatos spp. ('guitarfish')*
- Rhinobatos caseiri
- Rhinobatos incertus
Reptile:
?Coniasaurus crassidens*
Mosasauridae
* micro-vertebrate - should use/need magnification to find
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