oligoporus, Xenisthmus Gill [A. C.], Bogorodsky [S. V.] & Mal [A. O.] 2017:205, Figs. 1-2 [Zootaxa 4286 (no. 2); ref. 35404] Red Sea, Saudi Arabia, Duba, unnamed island, fringing reef, 27°04'N, 35°46'E, depth 10-12 meters. Holotype: SMF 34908. Paratypes: AMS, BPBM, KAUMM. •Valid as Xenisthmus oligoporus Gill, Bogorodsky & Mal 2017 -- (Bogorodsky & Randall 2018:[7] 245 [ref. 36492], Golani & Fricke 2018:165 [ref. 36273], Parenti 2021:58 [ref. 38603], Bogorodsky & Goren 2023:27 [ref. 40247]). Current status: Valid as Xenisthmus oligoporus Gill, Bogorodsky & Mal 2017. Xenisthmidae. Distribution: Red Sea endemic. Habitat: marine.