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中国厦门潮间带沙滩的一新种 Helmutkunzia Wells amp; Rao, 1976 及伪棒棘虱属(桡足纲:哲水蚤目: Miraciidae)的新属。

A new species of Helmutkunzia Wells amp; Rao, 1976 from an intertidal sandy beach in Xiamen, China and proposal of Pseudobalucopsylla gen. nov. (Copepoda, Harpacticoida, Miraciidae).

机构信息

College of Marine Life Sciences, Ocean University of China, 5 Yushan Road, Qingdao 266003, Shandong Province, China..

Department of Life Sciences, The Natural History Museum, Cromwell Road, London SW7 5BD, U.K. .

出版信息

Zootaxa. 2021 Oct 12;5051(1):487-505. doi: 10.11646/zootaxa.5051.1.19.

DOI:10.11646/zootaxa.5051.1.19
PMID:34810894
Abstract

A new species of the genus Helmutkunzia Wells Rao, 1976 (Miraciidae) is described from specimens collected from an intertidal sandy beach in Xiamen, Fujian Province, China. Helmutkunzia xiamenensis sp. nov. differs from its two congeners by the length/width ratio of the female P5 exopod, the number or length of the setae on the sexually dimorphic P2 endopod in the male and the relative length of the spines on the endopodal lobe of the male P5. The Chinese species is morphologically closest to H. variabilis Wells Rao, 1987 from the Andaman and Nicobar island chain. Females of both species can readily be differentiated by the relative length of the P5 exopod while males can be differentiated by the length of the armature elements on P2 enp-2 and the endopodal lobe of P5. The genus Balucopsylla Rao, 1972 is reviewed, resulting in the proposal of Pseudobalucopsylla gen. nov. to accommodate the type species Balucopsylla triarticulata Wells Rao, 1987 and three new Indo-Pacific species previously identified with it: P. obscura sp. nov. from the Andaman Islands, P. costaricensis sp. nov. from the Pacific coast of Costa Rica and P. mielkei sp. nov. from the Galpagos archipelago. A key to species of Pseudobalucopsylla sp. nov. is provided.

摘要

一种新的 Helmutkunzia 属(Miraciidae)物种,由产自中国福建省厦门市潮间带沙滩的标本描述。厦门 Helmutkunzia xiamenensis sp. nov. 与其两个近缘种的区别在于雌性 P5 外肢的长/宽比、雄性 P2 内肢性二态性的刚毛数量或长度以及雄性 P5 内肢瓣上刺的相对长度。中国物种在形态上最接近来自安达曼和尼科巴群岛链的 H. variabilis Wells Rao, 1987。这两个种的雌性很容易通过 P5 外肢的相对长度来区分,而雄性则可以通过 P2 enp-2 上的装备元素的长度和 P5 的内肢瓣来区分。对 Rao, 1972 属的 Balucopsylla 进行了综述,提出了拟 Balucopsylla 属 nov. 以容纳模式种 Balucopsylla triarticulata Wells Rao, 1987 和以前与之相关的三个新的印度-太平洋物种:来自安达曼群岛的 P. obscura sp. nov.、来自哥斯达黎加太平洋海岸的 P. costaricensis sp. nov. 和来自加拉帕戈斯群岛的 P. mielkei sp. nov.。提供了拟 Balucopsylla sp. nov. 种的关键。

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