Department of Biological Sciences, The George Washington University, Washington, D.C. 20052, USA..
Department of Natural History, University Museum of Bergen, University of Bergen, P.O. Box 7800, 5020 Bergen, Norway..
Zootaxa. 2021 Aug 24;5026(1):71-101. doi: 10.11646/zootaxa.5026.1.3.
We address the phylogenetic relationships of pimoid spiders (Pimoidae) using a standard target-gene approach with an extensive taxonomic sample, which includes representatives of the four currently recognized pimoid genera, 26 linyphiid genera, a sample of Physoglenidae, Cyatholipidae and one Tetragnathidae species. We test the monophyly of Pimoidae and Linyphiidae and explore the biogeographic history of the group. Nanoa Hormiga, Buckle and Scharff, 2005 and Pimoa Chamberlin Ivie, 1943 form a clade which is the sister group of a lineage that includes all Linyphiidae, Weintrauboa Hormiga, 2003 and Putaoa Hormiga and Tu, 2008. Weintrauboa, Putaoa, Pecado and Stemonyphantes form a clade (Stemonyphantinae) sister to all remaining linyphiids. We use the resulting optimal molecular phylogenetic tree to assess hypotheses on the male palp sclerite homologies of pimoids and linyphiids. Pimoidae is redelimited to only include Pimoa and Nanoa. We formalize the transfer from Pimoidae of the genera Weintrauboa and Putaoa to Linyphiidae, re-circumscribe the linyphiid subfamily Stemonyphantinae, and offer revised morphological diagnoses for Pimoidae and Linyphiidae.
我们采用标准的靶向基因方法，结合广泛的分类样本，研究了拟平腹蛛科（Pimoidae）的系统发育关系，其中包括四个现认可的拟平腹蛛属、26 个平腹蛛属、Physoglenidae、Cyatholipidae 和 Tetragnathidae 的一个物种的代表。我们检验了拟平腹蛛科和平腹蛛科的单系性，并探讨了该类群的生物地理历史。Nanoa Hormiga、Buckle 和 Scharff（2005）和 Pimoa Chamberlin Ivie（1943）形成一个分支，是包括所有平腹蛛科、Weintrauboa Hormiga（2003）和 Putaoa Hormiga 和 Tu（2008）在内的谱系的姊妹群。Weintrauboa、Putaoa、Pecado 和 Stemonyphantes 形成一个分支（Stemonyphantinae），是所有剩余平腹蛛科的姊妹群。我们使用得出的最佳分子系统发育树来评估关于拟平腹蛛科和平腹蛛科雄性触肢板同源性的假说。拟平腹蛛科被重新定义为仅包括 Pimoa 和 Nanoa。我们将 Weintrauboa 和 Putaoa 从拟平腹蛛科转移到平腹蛛科，重新定义了平腹蛛科的亚科 Stemonyphantinae，并为拟平腹蛛科和平腹蛛科提供了修订后的形态学诊断。
