Department of Animal Ecology; J.-F. Blumenbach Institute for Zoology and Anthropology; University of Gttingen; Gttingen; Germany.
Centre for Taxonomy and Morphology; Leibniz Institute for the Analysis of Biodiversity Change (LIB); Museum of Nature Hamburg; Hamburg; Germany; American Museum of Natural History; New York; NY; United States of America.
Zootaxa. 2024 Mar 4;5418(5):551-575. doi: 10.11646/zootaxa.5418.5.6.
Four new species of trachelid spiders belonging to the genus Utivarachna Kishida, 1940 are described: U. angsoduo sp. nov., U. balonku sp. nov., U. rimba sp. nov., and U. trisula sp. nov. Part of the EFForTS project, the spider specimens were uncovered in a canopy fogging collection of tree crown arthropods along a land-use gradient from rainforest via jungle rubber (rubber agroforestry) to monocultures of rubber and oil palm in Jambi Province, Sumatra, Indonesia. Three of the proposed new species were found exclusively in rainforest or jungle rubber agroforest (U. angsoduo sp. nov., U. rimba sp. nov., U. trisula sp. nov.), and one of them exclusively in monocultures of rubber trees (U. balonku sp. nov.). We provide photographs and distribution maps for the proposed new species, and discuss their potential ecology based on their sampling locations. We also encountered a fifth species of the genus in all four land-use systems, U. phyllicola Deeleman-Reinhold, 2001, one of two species of the genus previously recorded from Sumatra, and also provide photographs and distribution maps for this species in the research area of the EFForTS project.
四种新的特拉赫利德蜘蛛属于 Utivarachna Kishida，1940 属被描述：U.angsoduo sp。nov.，U. balonku sp。nov.，U. rimba sp。nov.和 U. trisula sp。nov. 该蜘蛛标本是 EFForTS 项目的一部分，是在印度尼西亚苏门答腊占碑省从雨林到丛林橡胶（橡胶农林复合经营）再到橡胶和油棕单一栽培的土地利用梯度的树冠节肢动物的树冠雾气采集过程中发现的。所提出的三个新物种仅在雨林或丛林橡胶农林复合经营（U.angsoduo sp。nov.，U.rimba sp。nov.，U. trisula sp。nov.）中发现，其中一个仅在橡胶树的单一栽培中发现（U. balonku sp。nov.）。我们为拟议的新物种提供了照片和分布图，并根据采样地点讨论了它们的潜在生态。我们还在所有四个土地利用系统中遇到了该属的第五个物种，即 U.phyllicola Deeleman-Reinhold，2001，这是之前从苏门答腊记录的两个物种之一，并且还为该物种在 EFForTS 项目的研究区域提供了照片和分布图。
