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Title: A new species of Cybaeus L. Koch, 1868 (Araneae, Cybaeidae) with simple genitalia from central Japan is the sister species of C. melanoparvus Kobayashi, 2006 with elongated genitalia
Authors: Sugawara, Yusuke
Ihara, Yoh
Nakano, Takafumi  kyouindb  KAKEN_id  orcid (unconfirmed)
Author's alias: 菅原, 優介
中野, 隆文
Keywords: Arachnida
Cybaeus koikei sp. nov.
molecular phylogeny
RTA clade
Issue Date: 2021
Publisher: Pensoft Publishers
Journal title: Zoosystematics and Evolution
Volume: 97
Issue: 1
Start page: 223
End page: 233
Abstract: Spiders of the genus Cybaeus L. Koch, 1868 exhibit two major centers of diversity: Western North America and Japan. Several Japanese Cybaeus possess an elongated embolus in the male palp and elongated tubular spermathecae in the female genitalia. Here we describe Cybaeus koikei sp. nov. from central Honshu, Japan, which has an unelongated embolus and bulbous spermathecae. Phylogenetic analyses using nuclear and mitochondrial gene markers clearly support the monophyly of C. koikei sp. nov. and Cybaeus melanoparvus Kobayashi, 2006, a species with elongated genitalia. Both species share a similar habitus and a cluster of robust setae on the lateral surface of the male palpal patella. The latter is considered a synapomorphy for C. koikei sp. nov. and C. melanoparvus. A supplementary description of the spermathecae of C. melanoparvus is also provided.
Rights: Copyright Yusuke Sugawara et al.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
DOI(Published Version): 10.3897/zse.97.64473
Appears in Collections:Journal Articles

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