thomasi, Gobius Boulenger [G. A.] 1916:336, Fig. 195 [Catalogue of the fresh-water fishes of Africa v. 4; ref. 585] Northern Sherbo District, Sierra Leone. Syntypes: BMNH 1915.4.13.66-67 (2). •Valid as Yongeichthys thomasi (Boulenger 1916) -- (Maugé 1986:387 [ref. 6218], Miller 1990:950 [ref. 19376], Harrison & Miller in Lévêque et al. 1992:816 [ref. 21590], Afonso et al. 1999:86 [ref. 25466], Harrison et al. 2007:533 [ref. 30083], Wirtz et al. 2007:40 [ref. 30263], Schliewen 2011:221 [ref. 31738], Fermon et al. 2022:225 [ref. 39448]). •Valid as Favonigobius thomasi (Boulenger 1916) -- (Miller & Murdy in Carpenter & De Angelis 2016:2840 [ref. 34618]). Current status: Valid as Yongeichthys thomasi (Boulenger 1916). Gobiidae: Gobiinae. Distribution: Eastern Atlantic, western-central Africa: Senegal south to Democratic Republic of Congo. Habitat: freshwater, brackish, marine.