124 



B 



Fig. 78: Posterior view of the fourth vertebra, and os Suspensorium of Phoxinus. A: P. eos (KU 12255. 

 43.0 mm SL); B: P. cumberlandensis (KU 18934. 52.0 mm SL); C: P. phoxinus (CNUC uncat.. 76.0 

 mm TL). Scale bars = 1 mm. 



and in the outgroups (TS 172[0]); the space extends only to the middle of os Suspensori- 

 um, the left and right parts of the os Suspensorium contact each other at the medial from 

 the middle to the ventral end of the os Suspensorium in P. phoxinus (TS 172[1]). 

 A neural arch (neural arch 4) and spine are present on dorsal aspect of centrum 4. The 

 anterior edge of neural arch 4 bears a notch. The notch is deep in P. oreas, erythrogaster, 

 eos. and in the outgroups (TS 1 73 [0] ). but shallow in other species of Phoxinus (TS 

 1 73 [ 1 ] ) . A space is present between the anterior margin of neural arch 4 and the poste- 

 rior margin of neural arch 3. This space is partially formed by the notches at the anteri- 

 or margin of the neural arch 4 and the posterior margin of the neural arch 3. The space 

 extends only to the middle of the anterior margin of neural arch 4 in P. erythrogaster (TS 

 174[1]). but to ventral portion of the anterior margin of neural arch 4 in other species of 

 Phoxinus and in the outgroups (TS 174[0]). The neural spine bears a process at its po- 

 sterior margin of the neural spine 4 in P. phoxinus (TS 175[0]) (Fig.80A): the process is 

 absent in other species of Phoxinus and in the outgroups (TS 1 75[0] ). 



