St. Marks River Fauna 47 



Remarks — The scales, while certainly Lepisosteus, could not be 

 referred to a species with confidence. Lepisosteus occurs in freshwater 

 and estuarine habitats (Hoese and Moore 1977, Lee et al. 1980). 



Order Amiiformes 



Family Amiidae 



Amia calva Linnaeus 



Bowfin 



Material— Left dentary, UGAMNH2088; left frontal, 

 UGAMNH2089; cervical vertebra, UGAMNH2090. 



Remarks — This material compares well with modern specimens 

 of Amia calva. The bowfin is a freshwater and estuarine species 

 (Hoese and Moore 1977, Lee et al. 1980). 



Order Siluriformes 



Family Ictaluridae 



Ictaluridae gen. et sp. indet. 



Material— Spine, UGAMNH2112; vertebra, UGAMNH2113. 

 Remarks — The available material, while certainly catfish, could 

 not be referred to a genus or species with confidence. 



Pylodictis cf. P. olivaris (Rafinesque) 

 Flathead Catfish 



Material — Left proximal coracoid, UGAMNH2119. 



Remarks — The morphology of the single element is very similar 

 to modern specimens of P. olivaris and distinct from the other known 

 regional ictalurids available for comparison. The specimen at hand 

 shows some evidence of mineralization, but mineralization is not 

 extensive. The species occurrence in the St. Marks River is outside 

 its reported range which extends from northeastern Mexico east 

 throughout Gulf of Mexico drainages to Mobile Bay (Lee et al. 

 1980 et seq.). However, in recent times the species has undergone 

 introductions and populations are now known from at least the 

 Appalachicola-Chatahoochee System (M. and B. J. Freeman, 

 University of Georgia, personal communication). Uyeno and Miller 

 (1962) reported some specimens of P. olivaris from the Trinity River 

 Terrace, Texas. The deposit was dated to the Sangamon (late 

 Pleistocene); however, that site is within the present range of the 

 species. It is a freshwater species (Hoese and Moore 1977, Lee et al. 

 1980). 



