chucunaque, Rivulus Breder [C. M., Jr.] 1925:7, Fig. 6 [American Museum Novitates No. 180; ref. 15531] Río Chucunaque, in a small side stream near Yavisa, Darien Province, Panama. Holotype: AMNH 8406. Paratypes: AMNH 22728-30 (8, 1, 14); USNM 94226 (8). •Valid as Rivulus chucunaque Breder 1925, subspecies chucunaque Breder 1925 -- (Lazara 2001:272 [ref. 25711], Etzel & Berkenkamp 1992:30 [ref. 32437]). •Valid as Rivulus chucunaque Breder 1925 -- (Huber 1992:150 [ref. 20639], Costa in Reis et al. 2003:535 [ref. 27061], Costa 2006:139 [ref. 28875] in subgenus Cynodonichthys). •Valid as Cynodonichthys chucunaque (Breder 1925) -- (Costa 2011:242 [ref. 31655]). Current status: Valid as Cynodonichthys chucunaque (Breder 1925). Rivulidae: Rivulinae. Distribution: Pacific river basins, Panama. Habitat: freshwater.