Sternarchorhynchus mormyrus (Steindachner, 1868)

Ferraris, Carl J., Jr, Santana, Carlos David de & Vari, Richard P., 2017, Checklist of Gymnotiformes (Osteichthyes: Ostariophysi) and catalogue of primary types, Neotropical Ichthyology 15 (1), No. e 160067, pp. 1-8 : 1-8

Sternarchorhynchus mormyrus (Steindachner, 1868)

Stern. [ Sternarchus ] mormyrus Steindachner, 1868a: 176 . Type locality: [Marabitanos, Brazil]. Syntypes: NMW 65336, NMW 65345; both with regenerated tails. Described in more detail in Steindachner (1868b: 253, pl. 1, fig. 3) with locality as: Marabitanos.

Distribution: Upper Amazon River, Negro, and Orinoco River basins ( de Santana, Vari, 2010b).

Sternarchorhynchus oxyrhynchus ( Müller, Troschel, 1848)

St. [ Sternarchus ] oxyrhynchus Müller, Troschel, 1848: 640 . Type locality: Essequibo [ Guyana]. Holotype or Syntype: ZMB 4086; 16-18 Zoll TL [470 mm TL; Ellis, in Eigenmann 1912: 438, footnote 71). Described, as new, in more detail in Müller, Troschel (1849: 16, pl. 2, figs. 1, 2).

Sternarchorhynchus Mulleri [sic] Castelnau,1855:95. Type locality: la riviere d’Essequebo [ Guyana]. Unneeded replacement name for Sternarchus oxyrhynchus Müller, Troschel, 1848 .

Remarks: See discussion in de Santana, Vari (2010b: 333) regarding the uncertainty about whether Müller, Troschel examined more than one specimen. At present, only a single specimen has been found at ZMB.

Distribution: Orinoco River basin; report of the species in Essequibo River probably erroneous ( de Santana, Vari, 2010b).