Atherinella guatemalensis (Günther 1864) . Guatemala Silverside, Peppered Silverside; Pejerrey De Guatemala, Plateadito de Huamuchal, Sardina

Vouchers: UCR 0052-004 (4). Distribution: Eastern Pacific Ocean; from central Mexico to northern Nicaragua; entering estuaries and littoral lagoons and ascending river courses; (Nicaragua) PN (Pacific); 0–15 masl; Per, Dia, Amp. Occurrence and conservation status: Nat; LC (2019), population trend unknown. Literature: Villa (1982: 139, as Melaniris guatemalensis —synonym; detailed description, including illustrations and an identification key, and information on distribution and ecology) and Robertson & Allen (2015: 2527; detailed description, including illustrations, and information on distribution, with a map, and ecology).