artifrons, Cyprinodon variegatus Hubbs [C. L.] 1936:223, Pl. 6 (figs. 1-5) [Carnegie Institution of Washington Publications No. 457 (art. 17); ref. 2247] Small streams surrounding Progreso, Yucatán, Mexico. Holotype: UMMZ 102082. Paratypes: UMMZ 102083 (4), 102150 (57), 102162 (1), 102168 (8); USNM 117513 (2); ZMA 101006 (5). Type catalog: Nijssen et al. 1982:70 [ref. 19236]. •Valid as Cyprinodon artifrons Hubbs 1936 -- (Greenfield & Thomerson 1997:103 [ref. 22947], Castro-Aguirre et al. 1999:224 [ref. 24550], Schmitter-Soto et al. 2000:154 [ref. 27754], Lazara 2001:82 [ref. 25711], Strecker 2002:301 [ref. 26655], Wiley & Ghedotti 2003:1160 [ref. 27020], Costa in Reis et al. 2003:549, 550 [ref. 27061], Smith et al. 2003:16 [ref. 27621], Nelson et al. 2004:108 [ref. 27807], Strecker 2005:107 [ref. 28252], Miller 2006:297 [ref. 28615], Scharpf 2007:30 [ref. 30398], García-Hernández et al. 2009:92 [ref. 37265], Page et al. 2013:106 [ref. 32708], Lozano-Vilano & De la Maza-Benignos 2016:16 [ref. 35401], Esmaeili et al. 2018:10 [ref. 36738], Page et al. 2023:142 [ref. 40505], Aguilar-Medrano & Vega-Cendejas 2024:[3] [ref. 41240]). Current status: Valid as Cyprinodon artifrons Hubbs 1936. Cyprinodontidae: Cyprinodontinae. Distribution: Western Atlantic: coastal areas of Yucatán Peninsula (Mexico and Belize). Habitat: freshwater, brackish, marine.