Hookcheek Dwarfgoby

description

Description. Dorsal-fin rays VI + I, 8; anal-fin rays I, 7; pectoral-fin rays 16, rays not branched; 5 th segmented pelvic-fin ray 10 % of 4 th ray; branches on 4 th pelvic-fin ray 4, 4 segments between branches; 12 branched caudalfin rays; segmented caudal-fin rays 17; lateral scale rows 23; transverse scale rows 7; breast and pectoral-fin base scaleless; anterior spines of first dorsal fin extending just past origin of second dorsal fin; pelvic fins reaching to third anal-fin ray; cephalic sensory-pore system pattern group 2 (only IT missing); male genital papilla non-fimbriate. Measurements. Standard length 14.0 mm; head length 32.5; origin of first dorsal fin 37.5; origin of second dorsal fin 58.2; origin of anal fin 61.1; caudal-peduncle length 27.1; caudal-peduncle depth 13.6; body depth 20.7; eye diameter 8.2; snout length 4.3; upper-jaw length 12.5; pectoral-fin length 31.1; pelvic-fin length 35.7. Color. Color of freshly collected male holotype, OMNH-P 21096: (Fig. 1) Body translucent with a series of eight internal dark dashes spaced above vertebral column, with silver dashes between them. Another series of dark triangular spots below the vertebral column, the ones over t

Two new goby species of the genus Eviota from the Ryukyu Islands, Japan (Teleostei: Gobiidae)

diagnosis

Diagnosis. The following combination of characters distinguishes E. ancora from congeners: cephalic sensory-pore system pattern group 2 (lacking only IT pore); dorsal / anal fin-ray formula 8 / 7; pectoral-fin rays simple; 5 th pelvic-fin ray 10 % of 4 th; no conspicuous dark marks on body; scales not strongly pigmented; caudal fin with five irregular bands of circles of dark chromatophores crossing the fin; live or fresh specimens with a hook-shaped orange mark on side of the head.

Two new goby species of the genus Eviota from the Ryukyu Islands, Japan (Teleostei: Gobiidae)

discussion

Remarks. Eviota ancora shares the most characters with E. storthynx, but differs greatly from it in color.

Two new goby species of the genus Eviota from the Ryukyu Islands, Japan (Teleostei: Gobiidae)

distribution

Distribution. Amami-oshima Island, Kume-jima Island and Iriomote-jima Island, the Ryukyu Islands, Japan (Senou et al., 2004; In this study).

Two new goby species of the genus Eviota from the Ryukyu Islands, Japan (Teleostei: Gobiidae)