Taxonomic review of the Sebastes pachycephalus complex Title (Scorpaeniformes: Scorpaenidae) Author(s) Kai, Yoshiaki; Nakabo, Tetsuji Citation Zootaxa (2013), 3637(5): 541-560 Issue Date 2013-04-15 URL http://hdl.handle.net/2433/175499 © 2013 Magnolia Press; Licensed under a Creative Commons Right Attribution License http://creativecommons.org/licenses/by/3.0 Type Journal Article Textversion publisher Kyoto University Zootaxa 3637 (5): 541–560 ISSN 1175-5326 (print edition) www.mapress.com/zootaxa/ Article ZOOTAXA Copyright © 2013 Magnolia Press ISSN 1175-5334 (online edition) http://dx.doi.org/10.11646/zootaxa.3637.5.3 http://zoobank.org/urn:lsid:zoobank.org:pub:CBDC3FCF-4BE5-4899-A88B-D173EAE7352E Taxonomic review of the Sebastes pachycephalus complex (Scorpaeniformes: Scorpaenidae) YOSHIAKI KAI1, 3 & TETSUJI NAKABO2 1Maizuru Fisheries Research Station, Field Science Education and Research Center, Kyoto University, Nagahama, Maizuru, Kyoto, 625-0086 Japan. E-mail:
[email protected] 2The Kyoto University Museum, Kyoto University, Yoshida, Sakyo, Kyoto, 606-8501 Japan 3Corresponding author Abstract A taxonomic review of the Sebastes pachycephalus complex established the existence of two valid species, S. pachyceph- alus and S. nudus. Similarities between them include: cranium armed dorsally with robust preocular, supraocular, postoc- ular, and parietal spines; interorbital space concave; lower jaw lacking scales, shorter than upper jaw; thickened rays in ventral half of pectoral fin; dorsal fin usually with 13 spines and 12 soft-rays; pored lateral line scales 27–35 (usually 29– 33). However, S. pachycephalus is distinguishable from the latter in having minute scales below the entire dorsal-fin spine base (vs. lacking minute scales below first to fifth or variously to the posteriormost spine in the latter), dark spots scattered on the dorsal, anal and caudal fins (vs.