Graduate School of Agriculture; Forestry and Fisheries; Kagoshima University; 1-21-24 Korimoto; Kagoshima 890-0065; Japan.
Marine Eco-Evo-Devo Unit; Okinawa Institute of Science and Technology Graduate University; 1919-1 Tancha; Onna; Okinawa 904- 0495; Japan.
Zootaxa. 2023 Nov 2;5361(3):390-408. doi: 10.11646/zootaxa.5361.3.5.
Luciogobius griseus n. sp., belonging to the Luciogobius platycephalus complex, is described on the basis of 40 specimens from the Nansei Islands, southwestern Japan (subtropical area). The new species is generally found in intertidal gravel sediments subjected to freshwater runoff from springs on coastal lines or river mouths and is characterized by the following combination of characters: total second dorsal-fin rays 912 (modally 11); total anal-fin rays usually 1214 (modally 13); pectoral-fin rays 1215 (modally 13); vertebrae 17 or 18 + 23 or 24 = 4042 (18 + 23 = 41); uppermost 24 (23) rays on pectoral fin free; 812 pectoral-fin rays branched (uppermost free rays and sometimes lowermost ray unbranched); pectoral-fin membrane not strongly concave anteriorly (except for free rays); pelvic fins united, forming a disk; head relatively short, 13.920.8% of standard length (SL); relatively short pre-pelvic fin, length 14.422.1% of SL; relatively long pre-dorsal fin, length 68.972.9% of SL; relatively long pre-anal fin, length 63.567.7% of SL; relatively short pelvic fin, length 2.84.7% of SL; distance between posterior end of pelvic fin and anus relatively long, 32.036.4% of SL (aforementioned morphometrics each distinguishing L. griseus n. sp. from other species in the L. platycephalus complex); and fresh specimens with greenish dark brown or gray body. A key to the L. platycephalus complex is provided, together with limited descriptions and remarks on the other two members of the complex.
细纹狼牙鮨，隶属于狼牙鮨属扁头鱼复合种，基于来自日本西南的琉球群岛（亚热带地区）的 40 个标本描述。新种通常见于受到来自海岸线或河口处泉水淡水径流影响的潮间带砾石沉积物中，其特征在于以下特征组合：第二背鳍鳍条总数 912（模式 11）；臀鳍鳍条总数通常为 1214（模式 13）；胸鳍鳍条 1215（模式 13）；脊椎骨 17 或 18+23 或 24=4042（18+23=41）；胸鳍上最上面的 24（23）鳍条游离；812 根胸鳍鳍条分枝（最上面的游离鳍条和有时最下面的鳍条不分枝）；胸鳍膜前部不强烈凹入（游离鳍条除外）；臀鳍联合，形成一个盘；头部相对较短，占标准体长的 13.920.8%（SL）；相对较短的前臀鳍，长度为 SL 的 14.422.1%；相对较长的前背鳍，长度为 SL 的 68.972.9%；相对较长的前臀鳍，长度为 SL 的 63.567.7%；相对较短的臀鳍，长度为 SL 的 2.84.7%；臀鳍后端与肛门之间的距离相对较长，占 SL 的 32.036.4%（上述形态特征使 L. griseus n. sp. 与狼牙鮨属扁头鱼复合种中的其他种区分开来）；以及具有绿色深棕色或灰色身体的新鲜标本。提供了狼牙鮨属扁头鱼复合种的关键特征，以及对复合种中其他两个成员的有限描述和评论。
