essequibensis, Leptoglanis Eigenmann [C. H.] 1912:158, Pl. 13 (fig. 2) [Memoirs of the Carnegie Museum v. 5 (no. 1); ref. 1227] Crab Falls, Essequibo River, Guyana. Holotype: FMNH 53331 [ex CM 1652]. Paratypes: (10) BMNH 1911.10.31.65 (1); CAS 63669 [ex IU 12041] (1), 63670 [ex IU 12042] (1); FMNH 7381 (1), 53332 (1), 53563 (1); MCZ 30080 (1); CAS-SU 21903 (1); USNM 66221 [ex CM 1653] (1). Type catalog: Henn 1928:76 [ref. 12305], Böhlke 1953:44 [ref. 12291], Ibarra & Stewart 1987:52 [ref. 12367], Ferraris & Vari 1992:33 [ref. 19771], Ferraris 2007:187 [ref. 29155]. Appeared first as name only in Eigenmann 1910:384 [ref. 1224]. •Valid as Myoglanis essequibensis (Eigenmann 1912) -- (Burgess 1989:276 [ref. 12860]). •Valid as Leptorhamdia essequibensis (Eigenmann 1912) -- (Bizerril & Borba 1994:3 [ref. 24592], Burgess & Finley 1996:166 [ref. 22901], Bockmann & Guazzelli in Reis et al. 2003:415 [ref. 27061], Ferraris 2007:187 [ref. 29155], Taphorn et al. 2022:48 [ref. 41297]). Current status: Valid as Leptorhamdia essequibensis (Eigenmann 1912). Heptapteridae: Heptapterinae. Distribution: South America: Essequibo and lower Tocantins River basins (Brazil and Guyana). Habitat: freshwater.