136 



Cj 



I 



B 



Fig. 88: Dorsal view of a por- 

 tion of the larger hemitrichia 

 of the first pectoral fin ray of 

 breeding males of (A) Phoxi- 

 nus erythrogaster (KU 5773, 

 51.5 mm SL), and (B) P. neo- 

 gaeus (KU 8521, 53.0 mm 

 SL). Scale bars = 1 mm. 



The first pectoral ray is the longest, thickest and strongest in all of the pectoral rays. The 

 two hemitrichia can be easily separated from one another, one is smaller than the other. 

 The base of the larger one is forked and articulates with the scapula; the medial side of 

 the bone is concave and contacts with the smaller one. Variation of the ray is present in 

 its segmentation in breeding males (Fig.88A-B ). In breeding male of P. neogaeus, the seg- 

 ments are broad and short, most of the segments bear a notch at its lateral margin (TS 

 200[1]). In other species and in the outgroup, the segments are narrow and relatively high 

 without any notch at the lateral margin (TS 200[0]). 



