Bajkul Milani Mahavidyalaya, Kismat Bajkul, Purba Medinipur, West Bengal, India721655.
Estuarine Biology Regional Centre, Zoological Survey of India, Gopalpur-on Sea, Ganjam, Odisha, India761002.
Zootaxa. 2022 Jul 13;5165(1):133-143. doi: 10.11646/zootaxa.5165.1.8.
Ariosoma bengalense sp. nov. is described on the basis of two specimens having total length (TL) 216304 mm, collected from the northern part of the Bay of Bengal, India. The new species is characterized by the dorsal-fin origin positioned above the gill-opening margin and above the 9th lateral-line pores, supratemporal pore absent, 910 predorsal vertebrae; 4649 preanal vertebrae and 146149 total vertebrae. The new species most closely resembles the Indian species Ariosoma gnanadossi, the new species differs from A. gnanadossi having the snout length (SL) longer than eye diameter (snout length 1.42.0 in eye diameter) vs. snout length almost equal to the eye diameter in A. gnanadossi. Further, the new species has translucent pectoral fins vs. black pectoral fins in Ariosoma gnanadossi. The new species differs from four of the seven species reported from India: Ariosoma majus, A. melanospilos, A. maurostigma and A. indicum with absence of supratemporal pores vs. three in all the species mentioned.
孟加拉拟油鲶是基于两个总长度（TL）为 216304 毫米的标本描述的，这些标本采集于印度孟加拉湾北部。新种的特征是背鳍起点位于鳃孔边缘上方和第 9 个侧线孔上方，缺少额上孔，有 910 个前背椎骨、4649 个前肛椎骨和 146149 个总椎骨。新种与印度种 Ariosoma gnanadossi 最为相似，与 A. gnanadossi 的区别在于，新种的吻长（SL）大于眼径（吻长 1.42.0 眼径），而 A. gnanadossi 的吻长几乎等于眼径。此外，新种的胸鳍半透明，而 Ariosoma gnanadossi 的胸鳍为黑色。新种与印度报道的七个种中的四个种不同：Ariosoma majus、A. melanospilos、A. maurostigma 和 A. indicum，它们没有额上孔，而所有提到的种都有三个额上孔。
