Description of a New Species of Threadfin (Teleostei: Perciformes: Polynemidae), Polydactylus longipes, from Mindanao Island, Philippines
Polydactylus longipes n. sp. is described on the basis of three specimens collected from Mindanao Island, Philippines. The species is uniquely distinguished from other Polydactylus species with six pectoral filaments by the length of the latter, the uppermost two extending beyond the midpoint of the caudal peduncle. The new species is further distinguished from other Polydactylus species by the following combination of characters: 13 unbranched pectoral fin rays, six pectoral filaments, 54 or 55 pored lateral line scales, six and 11 scale rows above and below the lateral line, respectively, 31 or 32 gill rakers, vomerine teeth present and grayish-black body.Abstract
Holotype of Polydactylus longipes n. sp. (USNM 363173, female, 159 mm SL, from Davao market, Mindanao Island, Philippines)
Other Polydactylus species with long or six pectoral filaments from the Indo-Pacific region. (A) Polydactylus macrophthalmus (Bleeker), MUFS 18293, 88 mm SL; (B) Polydactylus nigripinnis Munro, FRLM 25714, 143 mm SL; (C) Polydactylus sexfilis (Valenciennes in Cuvier and Valenciennes), MNHN 9731 (lectotype), 265 mm SL; (D) Polydactylus sextarius (Bloch and Schneider), MUFS 16643, 164 mm SL