91 



B 



Fig. 53: Parasphenoid in ven- 

 tral view of Phoxinus. A: P. 

 tennesseensis (UT 44.5274, 

 50.0 mm SL); B: P. oreas 

 (KU 3259, 55.0 mm SL); C: 

 P. eos (KU 12255, 43.0 mm 

 SL); D: P. cumberlandensis 

 (KU 18934, 52.0 mm SL); E: 

 P. neogaeus (KU 8521, 53.0 

 mm SL); F: P. phoxinus 

 (CNUC uncat., 76.0 mm TL); 

 G: P. erythro • gaster (KU 

 5773, 51.5 mm SL). Scale 

 bars = 1 mm. 



seensis, issykkulensis, and cumberlandensis (TS 87 [0]); the fork is almost absent in P. 

 neogaeus. 



The posterior portion of the parasphenoid overlaps the ventral side of the basioccipital. 

 The extent of the overlap varies among species of Phoxinus. The posterior end of the 

 parasphenoid extends to the middle of the dorsal part of the basioccipital in P. neogaeus, 



