Description of a new species of Obliquogobius (Gobiidae: Gobiinae) from the East China Sea off the Ryukyu Islands, southern Japan
Description of a new species of Obliquogobius (Gobiidae: Gobiinae) from the East China Sea off the Ryukyu Islands, southern Japan
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日本南部琉球群岛东海的斜戈比鱼（Gobiidae：Gobiinae）新种的描述
DOI：
10.1007/s10228-022-00901-1
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发表时间：
2022
影响因子：
1.2
通讯作者：
Shibukawa Koichi
中科院分区：
文献类型：
--
作者：
Fujiwara Kyoji;Shibukawa Koichi
三带斜戈比鱼十一月（Teleostei：Gobiidae）是根据在日本南部琉球群岛西北部东海115-124 m深处采集的三个标本（标准长度29.5-30.5毫米）进行描述的。该新种具有以下特征组合：第二背鳍和臀鳍各有I，9条鳍条；头部大小适中，长度为标准长度的32.8-34.1%；颈背侧面有鳞；存在头感觉管的眶后孔 G；鳃孔大小适中，向前延伸至与眼后缘齐平；腹鳍内侧相连，有发达的连接膜（最里面的鳍条之间）和系带（棘之间）；尾鳍背腹不对称，缺乏明显的斜尖尖端，并且具有三个最下面的分枝条比其他分枝条短得多；身体侧面有三个宽的黑色（保存标本中为深棕色）带，由黄色色素团叠加，最前面的带位于第一背鳍基部下方，中间带位于穿过第二背鳍基部后端的垂直线后面，最后带位于尾鳍基部；尾柄中心（身体中部和最后带之间）有一个微弱的、淡黄色的暗色斑点；一个大的黑色斑点，几乎覆盖整个第一背鳍；第二背鳍和尾鳍一般淡黄色，无横纹。
Obliquogobius trifasciatussp. nov. (Teleostei: Gobiidae) is described on the basis of three specimens (29.5–30.5 mm in standard length) collected in the East China Sea, northwest of the Ryukyu Islands, southern Japan, in a depth of 115–124 m. The new species is characterized by the following combination of characters: 2nd dorsal and anal fins each with I, 9 rays; head moderate in size, its length 32.8–34.1% of standard length; lateral surface of nape scaled; postorbital pore G of cephalic sensory canal present; gill opening moderate in size, extending anteriorly to level with posterior margin of eye; pelvic fins united medially, with a well-developed connecting membrane (between innermost rays) and frenum (between spines); caudal fin dorsoventrally asymmetrical, lacking a distinct obliquely pointed tip, and with three lowermost branched rays much shorter than other branched rays; three broad black (dark brown in preserved specimens) bands, superposed by yellow chromatophores, on lateral surface of body, anteriormost band located under 1st dorsal-fin base, middle band just behind a vertical line through posterior end of 2nd dorsal-fin base, and posteriormost band on caudal-fin base; a small faint, yellow-tinged dusky blotch on center of caudal peduncle (between middle and posteriormost bands on body); a large black blotch, covering almost entirety of 1st dorsal fin; 2nd dorsal and caudal fins generally pale yellow, without a barred pattern.