70 Kenneth T. Wilkins 



Table 1. Mammalian fauna of the late Pleistocene Rock Springs site, Orange 

 County, Florida. 







Extant Extant, not 



Species 



Extinct 



in Florida in Florida 



Blarina cf. carolinensis 





X 



Mormoops megalophylla 





X 



Myotis austroriparius 





X 



Holmesina septentrionalis 



X 





Dasypus bellus 



X 





cf. Glossotherium 



X 





Sylvilagus sp. 





X 



Geomys pinetis 





X 



Thomomys cf. orient alls 



X 





Castor canadensis 





X 



cf. Sigmodon 





X 



cf. Tursiops 





X 



Urocyon cinereoargenteus 





X 



cf. Canis dims 



X 





Tremarctos floridanus 



X 





Ursus americanus 





X 



Felis amnicola 



X 





cf. Felidae 







gen. et sp. indet. 







Mammut americanum 



X 





Mammuthus sp. 



X 





Trichechus manatus 





X 



Tapirus veroensis 



X 





Equus sp. 



X 





Mylohyus nasutus 



X 





Paleolama mirifica 



X 





Odocoileus virginianus 





X 



Bison sp. 



X 





is uncertain. The one extant species in the Rock Springs fauna not now 

 occurring in Florida is Mormoops megalophylla. The other extralimital 

 genus in the Rock Springs fauna is Thomomys, the smooth-toothed 

 pocket gophers. General affinities of Mormoops and Thomomys lie in 

 western North America and the Neotropics. 



Rock Springs is located in Kelly Park about 10 km (6 mi.) north of 

 Apopka, Orange County, Florida (Sorrento quad. NEl/4, NEl/4, 

 NWl/4, Sec. 15, T20S, R28E). Its elevation is about 7 m above present 

 sealevel. The spring is one of many flowing into the Wekiva River, a 

 tributary of the St. Johns River. The spring discharges at a mean rate of 

 1.83 cubic m/ second (64.6 cubic ft. /second) from a partially-submerged 



