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  • Phylogenomics of North American cybaeid spiders (Araneae, Cybaeidae), including the description of new taxa from the Klamath Mountains Geomorphic Province

This content will become publicly available on February 6, 2026

Title: Phylogenomics of North American cybaeid spiders (Araneae, Cybaeidae), including the description of new taxa from the Klamath Mountains Geomorphic Province
The systematics of humble-in-appearance brown spiders (“marronoids”), within a larger group of spiders with a modified retrolateral tibial apophysis (the RTA Clade), has long vexed arachnologists. Although not yet fully settled, recent phylogenomics has allowed the delimitation and phylogenetic relationships of families within marronoids to come into focus. Understanding relationships within these families still awaits more comprehensive generic-level sampling, as the majority of described marronoid genera remain unsampled for phylogenomic data. Here we conduct such an analysis in the family Cybaeidae Banks, 1892. We greatly increase generic-level sampling, assembling ultraconserved element (UCE) data for 18 of 22 described cybaeid genera, including all North American genera, and rigorously test family monophyly using a comprehensive outgroup taxon sample. We also conduct analyses of traditional Sanger loci, allowing curation of some previously published data. Our UCE phylogenomic results support the monophyly of recognized cybaeids, with strongly supported internal relationships, and evidence for five primary molecular subclades. We hypothesize potential morphological synapomorphies for most of these subclades, bringing a robust phylogenomic underpinning to cybaeid classification. A new cybaeid genusSiskiyugen. nov.and speciesSiskiyu armillasp. nov.is discovered and described from far northern California and adjacent southern Oregon and a new species in the elusive genusCybaeozyga,C. furtivasp. nov., is described from far northern California.  more » « less
Award ID(s):
1937725
PAR ID:
10570524
Author(s) / Creator(s):
; ;
Publisher / Repository:
Pensoft
Date Published:
Journal Name:
ZooKeys
Volume:
1226
ISSN:
1313-2989
Page Range / eLocation ID:
47 to 75
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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