First record of <i>Lutjanus biguttatus</i> (Perciformes: Lutjanidae) from Japan
First record of <i>Lutjanus biguttatus</i> (Perciformes: Lutjanidae) from Japan
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日本首次记录<i>Lutjanus biguttatus</i>（鲈形目：Lutjanidae）
DOI：
10.11369/jji.20-036
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发表时间：
2021
期刊：
影响因子：
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通讯作者：
日比野 友亮
中科院分区：
文献类型：
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作者：
佐藤 真央;井上 裕太;溝脇 一輝;小林 大純;松尾 怜;外山 太一郎;日比野 友亮
12个标本（71.5-89.9毫米标准长度）的笛鲷属（笛鲷科），采自日本南部琉球群岛石垣岛，经鉴定为双点笛鲷（Lutjanus biguttatus（Valenciennes in Cuvier and Valenciennes，1830），being characterized by the following combination of characters：背鳍XI，12;臀鳍III，8;胸鳍条15-16;体深3.5-3.8标准长，眶前深10.8-16.3头长，舌光滑，无小片细颗粒齿，吻部至尾鳍基部有一条深色纵带，侧线上方有两个白色斑点。图中显示了前上颌骨和齿骨的齿系，包括几个犬齿（一个是长而弯曲的）和许多小的圆锥形牙齿。收集的标本被确定为青少年，由于他们的颜色匹配的青少年先前所描述的，除了他们的身体尺寸小。虽然L. biguttatus与L.油管在少年阶段，后者的物种是由更大的身体和眶前深度区分。前者的标本被捕获在一个显着的局部地区（约。4米深）的几天，表明他们已经学校的可能性，在以前的研究中观察到的物种。笛鲷分布于印度-西太平洋，从马尔代夫到所罗门群岛，但以前没有在日本沃茨的记录。新的标准日本名称“Futahoshi-fuedai”，参考两个白色斑点以上的侧线在收集的标本，建议。
Twelve specimens (71.5–89.9 mm standard length) of the genus Lutjanus (Lutjanidae), collected from Ishigaki-jima Island, Ryukyu Archipelago, southern Japan, were identified as Lutjanus biguttatus (Valenciennes in Cuvier and Valenciennes, 1830), being characterized by the following combination of characters: dorsal fin XI, 12; anal fin III, 8; pectoral rays 15–16; body depth 3.5–3.8 in standard length; preorbital depth 10.8–16.3 in head length; tongue smooth, without patch of fine granular teeth; a dark longitudinal band from snout to caudal fin base; and two white spots above the lateral line. Dentition of the premaxilla and dentary, including several canine-like (one being long and curved) and many small conical teeth, is illustrated. The collected specimens were determined to be juveniles, due to their coloration matching that of juveniles previously described, in addition to their small body size. Although the coloration of L. biguttatus is similar to that of L. vitta during the juvenile stage, the latter species is distinguished by greater body and preorbital depths. The specimens of the former had been caught in a significantly localized area (in ca. 4 m depth) over several days, indicating the likelihood of their having been schooling, as observed in previous studies of the species. Lutjanus biguttatus is distributed in the Indo-western Pacific, from the Maldives to the Solomon Islands, but had not previously been recorded from Japanese waters. The new standard Japanese name “Futahoshi-fuedai”, given in reference to the two white spots above the lateral line in the collected specimens, is proposed.