本邦及び中國近海産アマダイ屬魚類の比較研究

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In his revisional study of the Japanese blanquilos, Kishinouye ('06) described two new species, Latilus ruber and L. auratus together with a known species L. argentatus Temminck and Schlegel. Latilus ruber, however, has since been synonymized with L. japonicus (Houttuyn) by Jordan, Tanaka and Snyder ('13), and it became evident that the genus Latilus has been preoccupied by the genus Branchiostegns (Jordan and Hubbs '25). These species were subsequently mainatained by various authors, but this conclusion has not been accepted by Tanaka ('31). But careful observation of the external as well as the internal features of many specimens has convinced the writer to divide the Japanese blanquilos into one species and subspecies, thus: Branchiostegus argentatus (Cuvier and Valenciennes), B. japonicus japonicus (Houttuyn) and B. japonicus auratus (Kishinouye). As indicated in Tables 1-3 and Figs. 1-3, B. argentatus is sharply distinguished from either of these two subspecies in the relative length of various parts of the body and osteological features. The coloration of this species is also characteristic. On the other hand, the differences between B. j. japonicus and B. j. auratus are not so clear as in the preceding case. As indicated in Table 1, the overlap of frequency distributions of relative length of body parts is rether great, but considerable reliance can be placed on the significance of the difference between these two subspecies (Tables 2-3). The mesethmoid funnel extends posteriorly running beneath the anterior part of the front-supraoccipital keel in B. j. japonicus, but the funnel ends at the anterior extremity of the front-supraoccipital keel in the other. It has thus become evident that the coloration of the body parts is externally the only evidence of remarkable difference between these two subspecies.
社団法人日本動物学会の論文
1953-09-15

著者

落合明
京都大学農学部水産学教室

本邦及び中國近海産アマダイ屬魚類の比較研究

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