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New dextral flounder Samariscus hexaradiatus sp. nov. (Samaridae, Pleuronectiformes) from the Solomon Islands, South-West Pacific Ocean

机译:新的右旋比目鱼Samariscus hexaradiatus sp。十一月所罗门群岛(西南太平洋的Sa形目)

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摘要

A new right eyed flounder, Samariscus hexaradiatus, is described on the basis of two specimens collected from the Solomon Islands, southwestern Pacific Ocean, at depths of 135-325 m. The new species is distinguished from other species of the genus by the following characters: 6 pectoral-fin rays; 82 dorsal-fin rays and 60-62 anal-fin rays; 9 abdominal vertebrae and 32 caudal vertebrae; presence of ctenoid scales on the interorbital space and high number (74-75) of lateral-line scales. Ocular side of body light brown with four and three distinguishable horseshoe-shaped spots along margins of both dorsal and ventral profiles, respectively. Two indistinct dusky blotches on the lateral line, one situated before the distal end part of the pectoral fin when flattened posteriorly, the other placed near the last one-third of the body length. Two distinct black spots placed on the upper and lower margins of the caudal peduncle at the posterior end of the dorsal and anal fins, respectively. Pectoral fin with dark pigmentation. Dorsal and anal fins dusky brown near the proximal and distal ends of the fin-rays, respectively, and with distinct series of small dusky spots on the medial parts the fin-rays.
机译:根据从西南太平洋所罗门群岛所采集的两个标本,其深度为135-325 m,描述了一种新的右眼比目鱼,Samariscus hexaradiatus。该新物种通过以下特征与该属的其他物种区分开:6个胸鳍射线; 6个胸鳍射线。背鳍射线82条,臀鳍射线60-62条;腹部椎骨9个,尾椎骨32个;眶间空间中存在类胡萝卜素鳞片,并且侧线鳞片数量众多(74-75)。身体的眼侧为浅褐色,在背侧和腹侧轮廓的边缘分别具有四个和三个明显的马蹄形斑点。在侧线上有两个模糊的模糊斑点,一个在向后展平时位于胸鳍的远端部分之前,另一个位于人体长度的最后三分之一附近。在背鳍和肛门鳍的后端分别位于尾柄的上缘和下缘的两个明显的黑点。胸鳍有黑色色素沉着。背鳍和肛门鳍分别在鳍片的近端和远端附近呈棕褐色,在鳍片的中间部分上有一系列明显的小灰点。

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