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Title :First record of Menaethius orientalis (Sakai, 1969) (Decapoda: Brachyura: Epialtidae) from the Ryukyu Archipelago
Title alternative :琉球列島初記録のゴカクモガニ (十脚目: 短尾下目: モガニ科)
Authors :Ohtsuchi, Naoya
Yoshida, Ryuta
Authors alternative :大土, 直哉
吉田, 隆太
Issue Date :19-Jun-2018
Abstract :The first record of the poorly known kelp crab species Menaethius orientalis (Sakai, 1969) from the Ryukyu Archipelago is provided based on a full-grown female specimen from Iriomote Island. Comparison with male characters described in previous studies suggested sexual dimorphism in the morphologies of anterolateral carapace part and chelipeds. Menaethius inornatus Dana, 1852, which had long been regarded as a junior subjective synonym of M. monoceros, is suggested to be treated as a valid species based on distinct morphological differences from the other two extant Menaethius species.
西表島より採集された1雌個体に基づき, ゴカクモガニMenaethius orientalis (Sakai, 1969) の琉球列島初記録を報告し, 既往研究において記載されていた雄の形態的特徴との比較から, 甲前側部や鉗脚長節の形態に性的二型があることを指摘した. また, イッカクガニM. monoceros (Latreille, 1825) の新参異名とされてきたM. inornatus Dana, 1852について, イッカクガニ属の既知2種との間に明瞭な形態的差異が認められることから, 正当な種と見なすことを提案した.
URL :http://w3.u-ryukyu.ac.jp/naruse/lab/Fauna_Ryukyuana.html
Type Local :雑誌掲載論文
ISSN :2187-6657
Publisher :Ryukyu University Museum, Fujukan
URI :http://hdl.handle.net/20.500.12000/42385
Citation :Fauna Ryukyuana Vol.43 p.1 -9
Appears in Collections:2018 - vol. 40–47

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