Exomegas Gill [T. N.] 1883:524 Masc. Petromyzon macrostomus Burmeister 1868. Type by original designation (also monotypic). Exodomegas Gill MS mentioned in passing on p. 524 in synonymy of Exomegas. •Valid as Exomegas Gill 1883 -- (Lacoste et al. 2021:[3] [ref. 38542]). •Synonym of Geotria Gray 1851 -- (Miller 1993:462 [ref. 21297], Kullander & Fernholm in Reis et al. 2003:11 [ref. 27061], Renaud 2011:16 [ref. 31770], Riva-Rossi et al. 2022:[2] [ref. 38978]). Current status: Synonym of Geotria Gray 1851. Geotriidae.