Key
to the east Pacific species of Bathygobius
by J. Van Tassell
Modified from Miller & Stefanni (2002)
1a
First, and generally
the remaining, free pectoral rays branched at least twice
(fig A); first dorsal fin distinctly pigmented to distal
edge (fig B); pelvic disk generally rounded (occasionally
attenuate) , with large lateral lobes(fig C), and disk extending
2/3 - 4/5 distance to anus; postocular blotches large (fig
D)....................................... ramosus
A
B
C
D
1b
First free pectoral rays bifid
(fig A); first dorsal fin not pigmented to distal edge (fig
B); pelvic disk generally elliptical, sometimes circular,
lateral lobes not attenuate(fig C)and disc extending at
least 4/5 distance to anus............................................................
2
A
B
C
2a
First dorsal fin with an oblique
dark band, darkest at the upper anterior and lower posterior
region of the fin (fig A); pelvic disk not reaching the
anus; anterior and posteriomost dorsal blotches about equal
in size (fig B)............................... andrei
A
B
2b
First dorsal fin with horizontal
markings and distal portion of fin with transparent edge
(fig A); pelvic disk generally extending to anus and possessing
small lateral lobes on frenum; posterior-most dorsal blotches
larger than anterior...................... lineatus
