Lythrypnus insularis Bussing, 1990

 

IDENTIFICATION

Head Pores - No head or preopercle pores

Scales - Scales in lateral series about 29

 

Fins - D1 - VI, 1st and 2nd spines elongate to base of 7th ray D2 in larger specimens; not elongate in females; D2 - 12(11-13); pectoral - 18-19(17-20); anal - 10(9-11)

Head - Maxilla to below anterior of eye; anterior nostril tubular; posterior nostril a raised rim; nape without crest.

Papillae - reduced pattern

Color - Preserved color: body and head with alternating narrow, dark crossbars and wide, pale interspaces; distinction of color intensity between the two less marked posteriorly. Body of holotype with 13 crossbars on each side; paratypes with 13(12), 14(43), 15(5) dark bars from origin of pectoral fin to caudal base. Narrow bars brown with a light median streak containing usually one, sometimes two rows of darker brown or black melanophores. Interspaces paler than brown crossbars because pale ground color overlain by fewer uniformly distributed melanophores. Head crossed by two V-shaped bars behind eye that cross over nape. Two bars on interorbital space. One oblique bar below eye and indistinct dark blotches on snout. Dark spots on lower half of head and on branchiostegal membrane. No dark blotches on base of pectoral fin.
Proximal half of spinous dorsal fin black, distal half dusky. Interradial membranes of second dorsal fin dusky, darker proximally; dark spots on dorsal rays forming two irregular longitudinal stripes. More numerous dark spots on caudal fin rays, forming about 5 irregular crossbars. Interradial menbranes of anal fin dusky, more intense anteriorly. Paired fins with few melanophores. (Bussing 1990)

Distribution - East Pacific; Revillagigedo Islands

Habitat -

Notes -