Small and valid species of Trichiurus brevis Wang and You, 1992 and T-russelli Dutt and Thankam, 1966, defined as the "T-russelli complex" (Perciformes: Trichiuridae)
Small and valid species of Trichiurus brevis Wang and You, 1992 and T-russelli Dutt and Thankam, 1966, defined as the "T-russelli complex" (Perciformes: Trichiuridae)
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DOI：
10.1007/s102280200030
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发表时间：
2002-08-23
影响因子：
1.2
通讯作者：
Kimura, S
中科院分区：
文献类型：
--
作者：
Burhanuddin, AI;Iwatsuki, Y;Kimura, S
三种小型的分类地位[可能小于约。最大总长度 (TL) 为 600 毫米] 和鲜为人知的物种，来自南中国海的短带鱼 Wang 和 You，1992 年和 T. 小李，1992 年，以及来自孟加拉湾的 T. russelli Dutt 和 Thanham，1966 年进行了重新检查。短带鱼和罗氏带鱼是有效物种，被重新描述，并为后者指定了新型。短带鱼被认为是小带鱼的高级同义词，它们的模式标本没有显着差异。两个有效物种，即 T. brevis 和 T. russelli，在总体外观上与 T. lepturus Linnaeus, 1758（大于约 1000 mm TL）相似，但与后者明显不同，因为枕上嵴顶部直接位于眼睛后缘上方（相对于后缘后方），总椎骨数量较少（147-155 和前两个物种分别为 149-153，T. lepturus 为 168-173），背鳍基部较长（TL 的平均 87% 和平均 84% vs. 平均 76%），尾柄长度较短（TL 的 6% 和 8% vs. 13%）。此外，前两个物种的特征是臀鳍起源位于约第32-35背鳍鳍条基部下方，而在T. lepturus中，其位于第37-41背鳍鳍条基部下方。我们认识到，T. brevis 和 T. russelli 共同组成了一个物种组，被定义为带鱼属中的“T. russelli 复合体”，这两个物种的不同之处在于口鼻形状（T. brevis 为强尖头，T. russelli 为中尖头）、口鼻长度（平均头长 (HL) 的 35% 与平均 30%）、前鳃盖骨长度（22% 与 19%）。 HL）、前背长度（70% vs. 63% HL）和真皮眼开度（16% vs. 18% HL）。
The taxonomic status of three small [probably less than ca. 600 mm in the largest total length (TL)] and poorly known species, Trichiurus brevis Wang and You, 1992 and T. minor Li, 1992, both from South China Sea, and T. russelli Dutt and Thankam, 1966, from Bengal Bay, was reexamined. Trichiurus brevis and T. russelli, being valid species, are redescribed and a neotype is designated for the latter. Trichiurus brevis is considered to be a senior synonym of T. minor, there being no significant differences in their type specimens. Both valid species, i.e., T. brevis and T. russelli, are similar to T. lepturus Linnaeus, 1758 (larger than ca. 1000 mm TL) in general appearance, but clearly differ from the latter in having the top of the supraoccipital crest situated directly above the posterior margin of eye (vs. well behind posterior margin), lower number of total vertebrae (147-155 and 149-153, respectively, in the former two species vs. 168-173 in T. lepturus), longer dorsal fin base (mean 87% and mean 84% vs. mean 76% of TL), and shorter caudal peduncle length (6% and 8% vs. 13% of TL). Furthermore, the former two species are characterized by having the anal fin origin situated below about the 32nd-35th dorsal fin ray base, whereas in T. lepturus it is situated below the 37th-41st dorsal fin ray base. We recognize that T. brevis and T. russelli together comprise a species group, defined as the "T. russelli complex," in the genus Trichiurus, the two species differing in snout shape (strongly pointed in T. brevis vs. moderately pointed in T. russelli), snout length [mean 35% vs. mean 30% of head length (HL)], preopercle length (22% vs. 19% HL), predorsal length (70% vs. 63% HL), and dermal eye opening (16% vs. 18% HL).