98 



and P. eos (TS 99 [1]); whereas it is high in other species of Phoxinus and in the out- 

 groups (TS 99 [0]). 



Viewed medially, an articulator facet is present (Fig.57C). The facet is formed by both 

 the dorsal side of the anteromedial process and the base of the anterior ascending process 

 in P. oreas, cumberlandensis, erythrogaster, tennesseensis, brachyurus, neogaeus, and eos 

 (TS 100 [1]); whereas the facet is formed only by the anterior ascending process in P. 

 phoxinus, issykkulensis, and in the outgroups (TS 100[0]). 



Fig.59: Lower jaw of Phoxi- 

 nus in lateral (a) and medial 

 (b) views. A: P. phoxinus 

 (CNUC uncat.: 76 mm TL); 

 B: P. oreas (KU 3259: 55.0 

 mm SL). Scale bars = 1 mm. 



