Hibino Yusuke, Kimura Seishi
Fisheries Research Laboratory, Mie University, 4190-172 Wagu, Shima-cho, Shima, Mie 517-0703, Japan; Email:
Fisheries Research Laboratory, Mie University, 4190-172 Wagu, Shima-cho, Shima, Mie 517-0703, Japan; Email: unknown.
Zootaxa. 2015 Dec 24;4060:62-70. doi: 10.11646/zootaxa.4060.1.10.
A new worm eel (Ophichthidae, Myrophinae), Muraenichthys velinasalis, is described based on five specimens (97.9-281.0 mm of total length) collected from Taiwan, Philippines, northeastern Australia, Vanuatu, and Sri Lanka. Muranichthys velinasalis is most similar to M. philippinensis and M. schultzei in the position of the dorsal-fin origin behind a vertical through mid-anus, but can be easily distinguished from the latter two species by the condition of the posterior nostril, unique character of M. velinasalis within Muraenichthys, and by the shape of the teeth on the innermost row of the upper jaw (relatively robust and slightly pointed vs. slender and pointed), arrangement of upper-jaw teeth (irregularly biserial anteriorly and uniserial posteriorly vs. completely uniserial in M. philippinensis, biserial or triserial in M. schultzei), and its more numerous or fewer preanal and total vertebrae (44-51 vs. 59-60 in M. philippinensis, 42-47 in M. schultzei; 136-139 vs. 128-130 in M. philippinensis, 119-128 in M. schultzei). The genus Muraenichthys is re-defined based on all currently valid species by the following combination of characters: eyes located anterior to mid-jaw; inner hole of posterior nostril above upper lip, and outer hole usually outside of mouth, with a prominent but short projected flap anteriorly; a single pore between anterior and posterior nostrils; three preopercular pores; teeth on jaws, vomer, and intermaxillary area; tooth shape variable, blunt to pointed but not distinctly recurved and tooth length equal or less than a half of eye diameter; teeth on jaws and vomer arranged in one to five rows; gill opening constricted, its height<170% of eye diameter; pectoral fins absent.
基于从台湾、菲律宾、澳大利亚东北部、瓦努阿图和斯里兰卡采集的5个标本（全长97.9 - 281.0毫米），描述了一种新的蚓鳗（蚓鳗科，Myrophinae亚科），即Muraenichthys velinasalis。Muraenichthys velinasalis在背鳍起点位于通过肛门中点的垂直线后方这一位置上，与菲律宾蚓鳗（M. philippinensis）和舒氏蚓鳗（M. schultzei）最为相似，但可通过后鼻孔的状况、Muraenichthys属内M. velinasalis的独特特征，以及上颌最内排牙齿的形状（相对粗壮且稍尖与细长且尖）、上颌牙齿的排列方式（前部不规则双列而后部单列，与菲律宾蚓鳗完全单列、舒氏蚓鳗双列或三列不同），及其更多或更少的肛前椎骨和总椎骨数量（44 - 51枚，与菲律宾蚓鳗的59 - 60枚、舒氏蚓鳗的42 - 47枚不同；136 - 139枚，与菲律宾蚓鳗的128 - 130枚、舒氏蚓鳗的119 - 128枚不同），轻松地与后两个物种区分开来。基于所有当前有效的物种，通过以下特征组合对Muraenichthys属进行了重新定义：眼睛位于上颌中部前方；后鼻孔的内孔在上唇上方，外孔通常在口外，前方有一个突出但短的突出皮瓣；前后鼻孔之间有一个单一的孔；三个前鳃盖孔；颌骨、犁骨和颌间区域有牙齿；牙齿形状多变，钝到尖但不明显弯曲，牙齿长度等于或小于眼径的一半；颌骨和犁骨上的牙齿排列成一到五排；鳃孔收缩，其高度小于眼径的170%；无胸鳍。
