Gobionellus microdon (Gilbert 1892) . Estuary Goby, Palmtail Goby; Gobio Cola de Palma, Gobio Plateado

Vouchers: UCR 0270-004 (36) and 0272-006 (1); other collections: CAS 52016 (1), MCZ 30716 (1) and TCWC 249101 (2). Distribution: Eastern Pacific Ocean; from the Gulf of California, Mexico, to Ecuador; entering estuaries and littoral lagoons and ascending river courses; (Nicaragua) PN and Ni (Pacific); 0–8 masl; Per, Dia, Amp. Occurrence and conservation status: Nat; LC (2019), population trend stable. Literature: Villa (1982: 229; detailed description, including illustrations and an identification key, and information on distribution and ecology), Robertson & Allen (2015: 2101; detailed description, including illustrations, and information on distribution, with a map, and ecology) and Angulo (2021: 37; listed, including information on distribution).