"A new species, Polydactylus siamensis, from Thailand and redescription of P. plebeius (Broussonet, 1782) with designation of a neotype (Perciformes: Polynemidae)" 著者 "MOTOMURA Hiroyuki, IWATSUKI Yukio, YOSHINO Tetsuo" journal or Ichthyological research publication title volume 48 number 2 page range 117-126 URL http://hdl.handle.net/10232/21800 A new species, Polydactylus siamensis, from Thailand and redescription of P. plebeius (Broussonet, 1782) with designation of a neotype (Perciformes: Polynemidae) Hiroyuki Motomura1,*, Yukio Iwatsuki2, and Tetsuo Yoshino3 1 Miyazaki University, the United Graduate School of Agricultural Sciences, Kagoshima University, 1-1 Gakuen-kibanadai-nishi, Miyazaki 889-2192, Japan (e-mail:
[email protected]) 2 Division of Fisheries Sciences, Faculty of Agriculture, Miyazaki University, 1-1 Gakuen-kibanadai-nishi, Miyazaki 889-2192, Japan (e-mail:
[email protected]) 3 Department of Marine Sciences, Faculty of Science, University of the Ryukyus, 1 Senbaru, Nishihara, Okinawa 903-0213, Japan (e-mail:
[email protected]) Received: January 12, 2000 / Revised: September 15, 2000 / Accepted: January 12, 2001 Abstract A new species, Polydactylus siamensis, is described on the basis of eight speci- Ichthyological mens from Thailand. The species is similar to P. plebeius (Broussonet, 1782) in having five pectoral filaments and several dark stripes along the scale rows above and below the lateral Research line, but differs from the latter in having lower counts of pectoral fin rays (15 vs. 16–18 in P. ©The Ichthyological Society of Japan 2001 plebeius), pored lateral line scales (54–58 vs. 60–68), scale rows above and below the lateral line (7 and 10 or 11, respectively vs.