Integrative taxonomy of Zeuxo (Crustacea: Peracarida: Tanaidacea) from Japan, with the description of a new species

Integrative taxonomy of Zeuxo (Crustacea: Peracarida: Tanaidacea) from Japan, with the description of a new species
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日本 Zeuxo(甲壳纲:Peracarida:Tanaidacea)的综合分类,以及一个新种的描述

DOI:
10.1007/s11756-022-01121-8
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发表时间:
2022
期刊:
影响因子:
1.5
通讯作者:
Keiichi Kakui
Keiichi Kakui
中科院分区:
生物学4区
文献类型:
--
作者:
Nobuya Okamoto;Keiichi Kakui

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本文描述了一种新的tanaidid种,Zeuxo bisp。一个名词,Zeuxo与Zeuxo ezoensis相似,但不同之处在于:(1)第1腕足无背端刺状刚毛;(2)雌性第1腕足前足有2 ~ 3根腹端单刚毛,雄性有3 ~ 4根;(3)第6腕足前足有4 ~ 5根扁平细齿刚毛。这两个物种在背甲上的背色素沉着模式也不同。Kimura双参数法计算的两个种间COI基因和18 SrRNA基因的距离分别为15.6-16.9%和2.8%,前者远大于以前报道的Z. ezoensis(0-1.5%),证实了我们从形态学上得出的Z.比利时Z.寄生虫不是同种的。在基于COI的最大似然系统发育树,日本taxaZ。阿比山Ezoensis和Z.cf. normani没有形成一个分支。
We describe a new tanaidid species,Zeuxo molybisp. n., from Kominato, Chiba, Japan.Zeuxo molybiclosely resembles the Japanese congenerZeuxo ezoensis, but differs in having (1) the pereopod-1 carpus without dorsodistal spiniform setae; (2) two or three ventrodistal simple setae on the pereopod-1 propodus in females, and three or four in males; and (3) the pereopod-6 propodus with four or five flattened denticulate setae. The two species also differ in the pattern of dorsal pigmentation on the carapace. Kimura 2-parameter distances between the two species were 15.6–16.9% for the cytochromecoxidase subunit I (COI) gene and 2.8% for the 18S rRNA gene; the former value is much greater than intraspecific distances previously reported forZ. ezoensis(0–1.5%), confirming our conclusion from morphology thatZ. molybiandZ. ezoensisare not conspecific. In a COI-based maximum-likelihood phylogenetic tree, the Japanese taxaZ. molybi,Z. ezoensis, andZ.cf.normanidid not form a clade.
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