macrognathus, Petrochromis Yamaoka [K.] 1983:137, Fig. 7 [Japanese Journal of Ichthyology v. 30 (no. 2); ref. 5363] Luhanga, Democratic Republic of Congo, Lake Tanganyika, 3°31'S, 29°09'E, depth 0.5 meters. Holotype: FAKU 50673. Paratypes: FAKU 50674-75 (1, 1), 51090 (1); NSMT-P 21791-92 (1, 1). •Valid as Petrochromis macrognathus Yamaoka 1983 -- (Maréchal & Poll 1991:370 [ref. 20946], Takahashi & Koblmüller 2014:262 [ref. 33264], Konings 2015:43 [ref. 34660], Konings 2019:44 [ref. 36983]). Current status: Valid as Petrochromis macrognathus Yamaoka 1983. Cichlidae: Pseudocrenilabrinae. Distribution: Eastern Africa: Lake Tanganyika. Habitat: freshwater.