137 



Fig. 89: Dorsal view of pelvic 

 girdle of Phoxinus. A: P. pho- 

 xinus (CNUC uncat., 76.0 

 mm TL); B: P. erythrogaster 

 (KU 5773, 51.5 mm SL); C: 

 P. neogaeus (KU 8521, 53.0 

 mm SL); D: P. issykkulensis 

 (P- 10696, 42.4 mm SL); E: P. 

 cumberlandensis (KU 18934, 

 52.0 mm SL); F: P. oreas (KU 

 3259, 55.0 mm SL); G: P. 

 tennesseensis (UT 44.5274, 

 SL 50.0 mm SL); H: P. eos 

 (KU 12255, 43.0 mm SL). 

 Scale bars = 1 mm. 



Pelvic girdle and fin 



The pelvic girdle (Fig.89A-H) is composed of a single, expanded basipterygium. Anteri- 

 orly, it is forked, thus two pelvic plates, the medial and lateral plate, are formed. Poster- 

 ior portion of the basipterygium forms a medial process which bears a posterior ischiac 

 project. One elongated triangular radial and three small ones articulate with the posterior 

 margin of the basipterygium. 



Variation is present in the general shape of the basipterygium. In P. phoxinus, oreas, is- 

 sykkulensis, and cumberlandensis, the anterior fork is deep (depth of the fork is equal or 

 longer than the length of the unforked part of the bone, the length of the ischiac project 

 not included) (TS 201 [0]); the fork is shallow (depth of the fork is much less than the 

 length of the unforked part of the bone) in other species of Phoxinus (TS 201 [1]). The 



