birkhahni, Rivulus Berkenkamp [H. O.] & Etzel [V.] 1992:102, Figs. [Deutsche Killifisch Gemeinschaft Journal v. 24 (no. 7); ref. 20601] Near Chiriqui Grande, Province Bocas del Toro, Panama, Caribbean side, 8°90'N, 82°10'W. Holotype: SMF 18436. Paratypes: SMF 18437 (4). •Valid as Rivulus birkhahni Berkenkamp & Etzel 1992 -- (Berkenkamp & Etzel 1993:22 [ref. 20600], Berkenkamp & Etzel 1999:64 [ref. 23985], Lazara 2001:271 [ref. 25711], Costa in Reis et al. 2003:534 [ref. 27061] Costa 2006:139 [ref. 28875] in subgenus Cynodonichthys). •Valid as Cynodonichthys birkhahni (Berkenkamp & Etzel 1992) -- (Costa 2011:242 [ref. 31655]). Current status: Valid as Cynodonichthys birkhahni (Berkenkamp & Etzel 1992). Rivulidae: Rivulinae. Distribution: Caribbean river basins, Panama. Habitat: freshwater.