インド・西太平洋産トゲナガハゼ属(条鰭網,スズキ目,ハゼ科)の分類学的再検討および2新種の記載

概要

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The Indo-West Pacific cheek-spine goby genus Gladiogobius Herre is reviewed. The genus contains three species, G. brevispinis sp. nov., G. ensifer Herre, 1933 and G. rex sp. nov., which are distinguished from other gobiine genera in having the following combination of characters : a single long, posteriorly-directed, spur-like spinous projection at rear margin of preopercle ; low cutaneous ridge along predorsal midline ; no scales on head and nape ; distinct transverse pattern of sensory-papilla rows on cheek. Gladiogobius brevispinis is described on the basis of 11 specimens (12.5-42.6 mm SL) from Japan (Ryukyu Islands), China (Hainan Island) and Indonesia (Sulawesi and Bali). It differs from congeners in having a short preopercular spine (clearly shorter than length of preopercular canal) and no filamentous dorsal-fin spines. Gladiogobius rex is described on the basis of 20 specimens (17.5-38.9 mm SL) from Phuket, Thailand, but also occurs widely in the Indian Ocean and the Red Sea. It is readily distinguished from congeners in having a very long preopercular spine (extending well beyond opercular margin). A redescription is also provided for G. ensifer based on 17 specimens (24.3-34.0 mm SL) from scattered localities in the West Pacific. We also include a key to the species of Gladiogobius.
国立科学博物館の論文