海南省溪鳢(鲈形目:溪鳢科)一新纪录种记述

First record of the species Rhyacichthys aspro(Perciformes:Rhyacichthyidae) in Hainan Province

2016年5月在海南省万泉河河口采集到2尾溪鳢(Rhyacichthys aspro),该物种属濒危物种,为海南省新纪录。该种主要形态特征包括:体延长,前部平扁,后部侧扁;口较小,下位,马蹄形,唇厚,上颌突出包住下颌;背鳍VII,I—7—8;臀鳍I—7—8,与第二背鳍相对,同形,起点在第二背鳍第一鳍条的下方;胸鳍1+19+1,宽圆,平扁,扇形,下腹位,基部宽大,向前、向头腹面扩展;腹鳍I—5,腹鳍小,前腹位,平扁,起点在胸鳍基部中央下方,左右腹鳍相隔颇远,腹鳍鳍棘外侧成平行皱褶;尾鳍2+12+1;纵列鳞38—39枚;横列鳞9—10枚;背鳍前鳞15—16枚;椎骨28枚。标本现保存于中国水产科学研究院珠江水产研究所。

Two individuals of the endangered species Rhyacichthys aspro were collected in the Wanquan River estuary of Hainan Province in May 2016.This is the first record of Rhyacichthys aspro in Hainan Province.The major morphological characters are body long,near the front depressed,the rear compressed;small mouth,hypostomatous,in the shape of horse’s hoof,fleshy lips,the upper jaw covering the lower jaw;dorsal fins VII,I-7-8;anal fin I-7-8,opposite to the second dorsal fin,in the same shape with the second dorsal fin,starting from the first fin ray of the second dorsal fin;pectoral fins 1+19+1,wide,round,flat,fan shaped,abdominal position,a wide base,extending to the head and the abdomen;ventral fins I-5,small,the front abdominal position,flat,starting from the lower middle of the pectoral fins base,the left and right ventral fins well separated in a large distance,with parallel folds outward;caudal fin 2+12+1;longitudinal scales 38-39;lateral scales 9-10;scales before dorsal fins 15-16;28 pieces of vertebrae.The specimen is preserved in Pearl River Fisheries Research Institute,Chinese Academy of Fishery Sciences.