megalostictus, Phenacogaster Eigenmann [C. H.] 1909:28 [Annals of the Carnegie Museum v. 6 (no. 1); ref. 1222] Tumatumari, Lower Potaro River, Guyana. Holotype: FMNH 53530 [ex CM 1056]. Paratypes: (103) BMNH 1911.10.31.341-343 (3), 1911.10.31.344-345 (2); CAS 48095 [ex IU 11749] (3), 62202 [ex IU 11747] (10, now 2); 62203 [ex IU 11747] (3), 62204 [ex IU 11748] (3), 62205 [ex IU 11750] (2); FMNH 7469 (1), 7568 (2), 52703-04 (5, 5), 53531-34 (1, 1, 1, 1), 69544 (2), 75168 (20); NMW 56564 (2); CAS-SU 21096 (2), 21907 (1); UMMZ 185302 (2); USNM 66276-77 (2, 1); ZMA 100972 (1). Type catalog: Henn 1928:67 [ref. 12305], Böhlke 1953:26 [ref. 12291], Nijssen et al. 1982:23 [ref. 19236], Ibarra & Stewart 1987:65 [ref. 12367], Vari & Howe 1991:33 [ref. 19022]. The gender of Phenacogaster is feminine, therefore mandatory correction to megalosticta •See Planquette et al. 1996:216 [ref. 22818]. •Valid as Phenacogaster megalosticta Eigenmann 1909 (often seen as megalostictus) -- (Ortega & Vari 1986:9 [ref. 9708], Taphorn 1992:295 [ref. 23654] as cf. megalostictus, Lucena & Menezes in Reis et al. 2003:204 [ref. 27061], Lucena & Gama 2007:152 [ref. 29059], Lucena & Malabarba 2010:265, 300 [ref. 30880], DoNascimiento et al. 2017:[7] [ref. 35679], Meza-Vargas et al. 2021:19 [ref. 39298], Taphorn et al. 2022:18 [ref. 41297] as megalostictus, Lucena 2024:251 [ref. 40817]). Current status: Valid as Phenacogaster megalosticta Eigenmann 1909. Characidae: Characinae. Distribution: South America: Essequibo River basin (Guyana) endemic. Habitat: freshwater.