Paratanakia Chang, Chen & Mayden 2014

A diagnostic key to all species of Paratanakia 1a. Dorsal fin and anal fin with broad red stripe in male; first dorsal fin rays 3, 8............................ P. himantegus 1b. Dorsal fin and anal fin with yellow stripe in male; first dorsal fin rays modally 3, 9................................. 2 2a. Lateral-line scales 32–35; the longitudinal blue stripe on body side always exceeding the anterior margin of dorsal fin, its anterior tip inserted above the 8 th –9 th lateral-line scales; the dorsal fin with a distinct, broader gray margin in male.... P. chii 2b. Lateral-line scales 36–37; the longitudinal blue stripe on body side extending forward to the position below the third spine of dorsal fin in maximum, and usually not exceeding the anterior margin of dorsal fin, its anterior tip inserted above the 13 th –14 th lateral-line scales; the dorsal fin with an indistinct, very thin gray margin in male................... P. haifengensis n. sp.