Redescription of Ilyarachna zachsi Gurjanova, 1933 (Crustacea: Isopoda: Munnopsidae) from the Sea of Japan, with the synonymisation of I. starokadomskii Gurjanova, 1933
Redescription of Ilyarachna zachsi Gurjanova, 1933 (Crustacea: Isopoda: Munnopsidae) from the Sea of Japan, with the synonymisation of I. starokadomskii Gurjanova, 1933
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重新描述来自日本海的 Ilyarachna zachsi Gurjanova，1933 年（甲壳类：Isopoda：Munnopsidae），并与 I. starokadomskii Gurjanova，1933 年同义
DOI：
10.11646/zootaxa.1129.1.4
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发表时间：
2006
期刊：
影响因子：
0.9
通讯作者：
M. Malyutina
中科院分区：
文献类型：
--
作者：
O. Golovan;M. Malyutina
Ilyarachna zachsi Gurjanova，1933，被重新描述，I.starokadomskii Gurjanova，1933被认为是该种的一个初级主观异名。Zachsi的特征是头节有一横排的6个背刺，沸石的前缘1-3个有4-14个背刺，雄蕊足2个口针不能到达原足类的远端。本种在沸石1-3的武装方面显示显著的种内变异性。具4长刺的较小的标本通常是雄性，这些以前被描述为I.starokadomskii，而更大的，更多刺的标本是雌性的(具有这种特征的极端状态的标本以前被描述为I.zachsi)。
Ilyarachna zachsi Gurjanova, 1933, from the Sea of Japan, is redescribed and I. starokadomskii Gurjanova, 1933 is regarded as a junior subjective synonym of that species. I. zachsi is characterized by the cephalon having a transverse row of 6 dorsal spines, anterior margins of pereonites 1–3 with 4–14 dorsal spines and the male pleopods 2 stylet not reaching the distal end of protopod. The species displays significant intraspecific variability in the armament of pereonites 1– 3. The smaller specimens with 4 long spines are generally males, these having been previously described as I. starokadomskii, while the larger, more spiny specimens are females (the specimen with extreme state of this character was previously described as I. zachsi).