Species Diversity
Online ISSN : 2189-7301
Print ISSN : 1342-1670
Rediagnosis of Onigocia grandisquama (Actinopterygii: Perciformes: Platycephalidae) and Comparison with Congeners
Hisashi Imamura
Author information
JOURNALS FREE ACCESS

Volume 21 (2016) Issue 2 Pages 151-159

Details
Download PDF (1044K) Contact us
Abstract

A platycephalid fish, Onigocia grandisquama (Regan, 1908) is rediagnosed based on 52 specimens, including the holotype, from the Indo-West Pacific. Geographic variation in the species was recognized in the number of pectoral-fin rays, the first example of such variation in fin ray counts in the Platycephalidae. The species displays wide intraspecific variation in the numbers of lachrymal, preocular, suborbital, and pterotic spines, with values for the first two overlapping with those of the very similar Onigocia spinosa (Temminck and Schlegel, 1843), making it difficult to separate the two. Onigocia grandisquama can be distinguished from O. spinosa, as well as from Onigocia macrocephala (Weber, 1913) and Onigocia macrolepis (Bleeker, 1854), which share with O. grandisquama an ocular flap on the posterior part of the eye, in lacking spines on the inner, middle, and/or outer ridges of the lachrymal. The generally greater number of pterotic spines also helps to separate O. grandisquama from its three congeners.

Information related to the author
© 2016 The Japanese Society of Systematic Zoology
Previous article Next article

Recently visited articles
feedback
Top