labiosus, Cyprinodon Humphries [J. M.] & Miller [R. R.] 1981:55, Figs. 3C, 4A, 5C [Copeia 1981 (no. 1); ref. 8587] Laguna Chichancanab, in lagoon at southern end on northern side of highway 184, Yucatán Peninsula, Quintana Roo, Mexico. Holotype: UMMZ 203907. Paratypes: TU 111575 (6); UMMZ 196546 (64, 5 c&s), 201734 (3), 201749 (77), 201755 (16), 201760 (37, 5 c&s), 203815 (1), 203908 (1, allotype); USNM 220012 (4); plus 3 sent to Mexican Government. Type catalog: Bart & Taylor 1993:51 [ref. 20906]. Also appeared in Humphries & Miller 1981:134 [ref. 8588]. •Valid as Cyprinodon labiosus Humphries & Miller 1981 -- (Gamboa Pérez 1992:311 [ref. 38704], Espinosa Pérez et al. 1993:33 [ref. 22290], Lazara 2001:86 [ref. 25711], Strecker 2002:302 [ref. 26655], Costa in Reis et al. 2003:550 [ref. 27061], Nelson et al. 2004:108 [ref. 27807], Strecker 2005:107 [ref. 28252], Miller 2006:304 [ref. 28615], Scharpf 2007:30 [ref. 30398], Page et al. 2013:107 [ref. 32708], Lozano-Vilano & De la Maza-Benignos 2016:22 [ref. 35401], Esmaeili et al. 2018:13 [ref. 36738], Page et al. 2023:142 [ref. 40505], Aguilar-Medrano & Vega-Cendejas 2024:[3] [ref. 41240]). Current status: Valid as Cyprinodon labiosus Humphries & Miller 1981. Cyprinodontidae: Cyprinodontinae. Distribution: Southern North America: endorheic Lake Chichancanab (Quintana Roo, Mexico) endemic. Habitat: freshwater.