214 



W. D. Mattheiv — Fossil Vertebrates and 



Paleo- 

 Meso- ceiie 

 zoic / — '^ — 



Cenozoic 



JK 











Eocene 









p 









-*^ 



^ 



9 fl ^ S 



Geologic Eange of Vertebrate Fauna of 



o 



8 ^. 



§ ^ ^ ^ § '^ ^ 



the Wasatch Group. Suessouian or 

 Lower Eocene. 





1 § 



i |.l §-5.2 1 



EH ^q g p O ^ flH 



BEPTILES 











Chelonia 



B^nidee 



X 



X X 



XXX 





Plastomenidse 



X 





X X 





Dermatemydidae 



XXX 



X X X X 





Trionychidae 



X 



X 



X X X X X X 





*Emydidse 







X X X X X X 





*Testudinida3 







X X X X X X 



Squamata 



*Laeertilia, fam. div. 







X XX XXX 





*Ophidia, fam. ineert. 





X 



X XX 



Crocodilia 



Crocodilid£e 



X 



X X 



X X X X X 



BIBDS 



?Gastornithid8e, etc. 







X X 



MAMMALS 











Carnivora 



Oxyclsenid^ 





X X X X 





Arctocyonidae 





? X 



X X 





Mesonychidae 





X 



X X X X 





^Oxyaenidae 







? X X X 





*Hyffinodontidae 







X X X X 





*Miacidaea 





X 



XXX 



IXSECTIVORA 



Pantolestidae, etc. 





X 



X X 





Leptictidae 





X 



XX X 





*TaIpidae, Soricidae 







XX XXX 



Menotyphla 



Plesiadapidae 

 ?Microsyopidae 







XXX 

 X X 



*PRIMATESb 



^ *Tarsiidae 

 * *Adapidae 







X X X X - --- 



XXX -- 



*Gliresc 



^Paramyidae, etc. 







XXX 



Edentata 



Metacheiromyidae 







? X X 



Taeniodonta 



Stylinodontidffi 





X X 



XXX 



*TlLLODONTIA 



^Esthonychidae 

 ^Tillotheriidae 







X , 



? X X 



Coxdylarthra 



Phenacodontidae 

 Meniscotheriidae 

 Hyopsodontidae 





X 



X X 

 X 

 ? X X X 



Entelonychia 



Arctostylops 







X 



Amblypoda 



Coryphodontidae 

 ^EobasileidaB 







X 

 ? X X X 



*Perissodactyla 



*Equidffi 

 *Tapiridae 

 ^Lophiodontidaed 

 •^Titanotheriidae 







X X X X X X 

 X X X X X X 

 XXX 

 X X X X 



*ARTIODACTYLAe 



*Dichobunidae 

 "Entelodontidas 







XXX 



X X X X X 



a The modern families of Carnivora are derived from the Miacidse. 



t" The higher primates are probably a branch from the Tarsiidae, but do 

 not appear in the record until the Oligoeene, and are unknown in the North 

 American Tertiary. The Adapidae are related to the lemurs. 



