Gobioides peruanus (Steindachner, 1880)

Angulo, Arturo, 2021, New records and range extensions to the Costa Rican freshwater fish fauna, with an updated checklist, Zootaxa 5083 (1), pp. 1-72 : 8

4) Gobioides peruanus (Steindachner, 1880) ;

Gobiidae .

Peruvian Eel-Goby, Smalleye Eel-Goby; Gobio-Anguila de Barro ( Fig. 2F ).

Diagnosis: This species differs from the other species of the family occurring in the freshwaters of the country (Pacific) by the following combination of characters: body very elongate (depth 9.0–14.0% of SL), compressed and eel-like; head small (5.0–8.0% of SL); dorsal fin long, with seven flexible spines and 14–15 rays; anal fin rays 15; caudal fin long, pointed and broadly joined to dorsal and anal fins; and coloration pattern (see Robertson & Allen 2015).

Basis of the record: A single specimen was observed and recorded in photo in the Quebrada Bomba Vieja (Barranca River basin), near the mouth of the río Barranca, El Roble, Puntarenas (9.96228, -84.73493), at 6 m. a.s.l., on January 6, 2021, by Beto Guido Méndez (Bird watcher guide/Naturalist).

Remarks: This species inhabits brackish tidal rivers and estuaries as well as freshwaters; lives in muddy burrows ( Robertson & Allen 2015).

Figures

FIG. 2. New country records. (A) Amphilophus labiatus, specimen captured in the Río San Juan, San Carlos, Alajuela (ca 10.89057, -84.26540), at ca 26 m.a.s.l., in November 2020, by an anonymous angler. (B) Amphilophus labiatus, specimen captured in the Río Sapoá, La Cruz, Guanacaste (11.21815, -85.60819), at 8 m.a.s.l., on January 19, 1967, by William Bussing and Myrna López (UCR 0122-014). (C) Anchovia clupeoides, specimen captured in the Río Pacuare, near the mouth of the river, Siquirres, Limón (10.21952, -83.28254), at 8 m.a.s.l., on November 17, 2004, by Jorge Picado (UCR 2840-005). (D) Colossoma macropomum, specimen captured in the Río Bebedero, Portones de Taboga, Bebedero, Cañas, Guanacaste, Costa Rica (10.36978, -85.19772), at 10 m.a.s.l., on March 27, 2020, by Javier Blandon. (E) Colossoma macropomum, specimen captured in the Río Bebedero, Altamira, Cañas, Guanacaste, Costa Rica (10.35378, -85.20408), at 18 m.a.s.l., on April 30, 2021, by Agustin Guzman. (F) Gobioides peruanus being depredated by the Bare-throated Tiger Heron (Trigrisoma mexicanum Swainson, 1834), photo captured in the Quebrada Bomba Vieja (Barranca river basin), near the mouth of the Río Barranca, El Roble, Puntarenas (9.96228, -84.73493), at 6 m.a.s.l., on January 6, 2021, by Beto Guido Méndez (Bird watcher guide/Naturalist). (G) Hypostomus cf. niceforoi, specimens captured in the Humedal Caño Negro, Los Chiles, Alajuela (ca 10.89081, -84.79415), at ca 33 m.a.s.l., on May 11-16, 2016, by Didiher Chacón-Chaverri. (H) Lutjanus purpureus, specimen captured in the Quebrada Hone Creek/Río Carbón, Talamanca, Limón (9.67153, -82.79047), at 12 m.a.s.l., on October 6, 2007, by Maribel Mafla et al. (UCR 2751-001). (I) Lutjanus purpureus, specimen captured in the Río Moín, at the Puerto Fluvial JAPDEVA, Limón (09.99745, -83.08077), at 7 m.a.s.l., on December 14, 2006, by Karina Rodríguez (UCR 2761-003).