Tribe Gambusiini Gill, new usage

[Clade 120]

Gambusiini Gill, 1893: 133 .

Type-genus: Gambusia Poey, 1854 .

Diagnosis. Gambusiins can be diagnosed by the following not uniquely derived and/or reversed features: (1) preorbital canal absent or opened, forming a very shallow groove [9-2]; (2) ascending process of premaxilla elongate, distal tip pointed [12-1]; (3) absence of an elongate and dorsal protuberance along R4p (just behind retrorse spines series) of anal fin in adult males [118-0]; and (4) more distal elements of R6 branches not fused [127-0].

Composition. Genera Gambusia, Belonesox, Pseudopoecilia, Neoheterandria, Scolichthys .

Distribution. Northern USA to Peru (Inland, Gulf, Atlantic and Pacific drainages) including the Caribbean Islands.