A New Species of the Genus Cybaeus (Araneae: Cybaeidae) from a Cave in Northeastern Central Honshu, Japan

Eitaro Matsushita; Yoh Ihara; Takafumi Nakano

doi:10.12782/specdiv.30.49

Abstract

A new species of Cybaeus L. Koch, 1868, C. eremospelyngus sp. nov., is described from Osawa-shonyudo Cave, Niigata Prefecture, northeastern central Honshu, Japan. This species has pale body coloration and relatively small eyes, which may be adapted to subterranean environments. In addition, C. eremospelyngus sp. nov. constructs a ‘Y-shaped’ retreat with three openings. This is the first record of a Cybaeus species that builds a retreat with three openings from central Honshu.

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© 2025 The Japanese Society of Systematic Zoology. This is an open access article distributed under a Creative Commons Attribution 4.0 License (CC BY, https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium or format, provided the original work is properly cited. The contents of this article are licensed under the CC BY 4.0, unless indicated otherwise in a credit line to the material.

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