1 (largest) in SL; dorsal fin posterior to midbody; scales 8/38/6' (to anal fin), 13 predorsal, 15 around peduncle; anal fin iv,26; great suborbital large, its suture with SO4 high on jaw, not fully developed, not in contact with the subopercular
canal; premaxilla with 8 tricuspid teeth, the first one much larger; two large similar teeth forming an inner row, close to the outer one; maxilla long, reaching to middle of eye level, not forming an angle with the premaxilla, with teeth along almost its entire margin (about 13, mostly tricuspid in the largest); mandible with 5 large teeth in front followed on side by about 11 smaller ones; ectoperygoid with ca.
Many modes of terrestrial locomotion have evolved among fishes, including ambipedal progression using pelvic fins (Harris 1960), use of rapidly twisting tail movements (Hseih 2010), anguilliform undulations (Gillis 1998), jumping using ventral suckers (Ebeling and others 1970), and walking using large subopercular
spines (Sayer 2005).
es un hueso laminar delgado, con la espina anterodorsal expandida anteroposteriormente.
The opercular is much larger than the subopercular
and the preopercular is almost vertical and shows an expanded dorsal process of typical perleidid shape (Brough, 1931; Tintori and Sassi, 1992; Tintori and Lombardo, 1996).
El opercular, interopercular y subopercular
, son huesos planos.
fossoris, with a multifid nasal cirrus, a broad dorsal membranous subopercular flap and a black spot on tips of first dorsal-fin spines lives in the Gulf of California and is a sister-species of O.
Upper margin of operculum straight and slightly rounded posterodorsally, no subopercular flap present; posterior margin of operculum straight, inclined anteriorly; preopercle indistinct, without a free margin.