Sicydium altum Meek, 1907 .

Atlantic Titi Goby; Chupapiedras, Tití, Gobio, Gobio de Río, Gobio de Río de Costa Rica, Lamearenas.

Distribution: Global: Western Atlantic Ocean; from northern Costa Rica to (probably) western Panama; entering estuaries and littoral lagoons and ascending river courses; Costa Rica: Sa, To, Pa, Ma and Si (Atlantic), 0–1180 m.a.s.l., Per, Dia (Cat).

Occurrence and conservation status: Nat, VU.

References: Bussing (1966: 237; listed, information on distribution), Bussing (1987: 236; 1998: 402; brief description, including illustrations and an identification key, information on distribution, with a map, and ecology) and Angulo et al. (2013: 1009; listed, including taxonomic information and distributional data).