Sicydium altum Meek 1907. Atlantic Titi Goby; Chupapiedras, Tití, Gobio, Gobio de Río, Lamearenas, Dormilón Vouchers: UCR 3225-007 (1). Distribution: Western Atlantic Ocean; from southern Nicaragua to (probably) western Panama; entering estuaries and littoral lagoons and ascending river courses; (Nicaragua) IM (Atlantic); 0–780 masl; Per, Dia, Amp. Occurrence and conservation status: Nat; VU B1ab(iii,v) (2020), population trend unknown. Literature: Bussing (1998: 402; brief description, including illustrations and an identification key, and information on distribution, with a map, and ecology) and Angulo (2021: 39; listed, including information on distribution). Remarks: This species was reported from northern Costa Rica to western Panama (Angulo 2021), including the binational (Costa Rica-Nicaragua) San Juan watershed. Our record in the Indio Maíz hydrogeographic unit represents a range extension in the known distribution of the species.

Published as part of Angulo, Arturo, Betts, Joel T., González-Alemán, Néstor J., Castañeda, Edgar, Berghe, Eric Van Den, Elías, Diego J., Mcmahan, Caleb D. & Matamoros, Wilfredo A., 2023, Continental fishes of Nicaragua: diversity, distribution and conservation status; with an annotated and illustrated checklist of species and an identification guide to families, pp. 1-89 in Zootaxa 5376 (1) on page 38, DOI: 10.11646/zootaxa.5376.1.1, http://zenodo.org/record/10208788