138 



medial pelvic plate is broad and forked in P. oreas and phoxinus (TS 202 [0]); it is nar- 

 row and unforked in other species of Phoxinus (TS 202[1]). The ischiac process is broad, 

 short triangular in P. neogaeus, issykkulensis, cumberlandensis, and eos (TS 203 [1]); the 

 process is an elongated triangle in other species of Phoxinus (TS 203[0]). 

 In the outgroups, the anterior fork is deep, the medial branch is broad and forked, and the 

 ischiac process is narrow and elongated triangular-shaped. 



A cartilage (Fig.89A, D) exists at the posterior to the ischiac process in P. issykkulensis, 

 neogaeus, and phoxinus (TS 204[1]). The cartilage is small and short rod-like in P. is- 

 sykkulensis and neogaeus', whereas it is an elongated triangle in P. phoxinus. This carti- 

 lage is absent in other species and in the outgroups (TS 204[0]). 



Fig. 90: Lateral view of proxi- 

 mal part of the first dorsal 

 pterygiophore of Phoxinus. 

 A: P. cumberlandensis (KU 

 18934, 52.0 mm SL); B: P. 

 neogaeus (KU 8521, 53.0 

 mm SL); C: P. brachyurus 

 (MCZ 3006, 75.9 mm SL); D: 

 P. oreas (KU 3259, 52.2 mm 

 SL); E: P. phoxinus (CNUC 

 uncat., 76.0 mm TL); F: P. 

 tennesseensis (UT 44.5274, 

 50.0 mm SL); G: P. eos (KU 

 12255, 43.0 mm SL). Scale 

 bars = 1 mm. 



