Ps-graduao em Zoologia; Universidade Federal de Minas Gerais.; Departamento de Zoologia; Instituto de Cincias Biolgicas; Universidade Federal de Minas Gerais; Brazil; CEP 31270-901..
Divisin de Aracnolog Museo Argentino de Ciencias NaturalesBernardino Rivadavia; Av. Angel Gallardo 470; C1405DJR Buenos Aires; Argentina.
Zootaxa. 2024 Jan 16;5399(5):517-539. doi: 10.11646/zootaxa.5399.5.3.
The Caatinga is a nucleus of seasonally dry tropical forest (SDTF) known as a hotspot of diversification and endemism. Despite its importance, this biome is still insufficiently sampled, resulting in extensive knowledge gaps regarding its species richness and composition. In this study we report two species of Xenoctenidae that are endemic to, and widely distributed in the Caatinga. We redescribe and illustrate Odo vittatus (Mello-Leito, 1936), the only xenoctenid species previously known from the Caatinga. We transfer this species to Xenoctenus Mello-Leito,1938, a genus currently known from six species restricted to Argentina, Bolivia, and Colombia. We also newly describe the male of Xenoctenus vittatus comb. nov. and provide new records of this species, which was hitherto known only from the type-locality, throughout the Caatinga and nearby semiarid vegetation formations. We also describe and illustrate a new species, Xenoctenus kaatinga sp. nov., based on males and female specimens collected throughout the Caatinga. Additionally, we propose diagnostic characters for Xenoctenus and redescribe the type-species, X. unguiculatus.
卡廷加是季节性干燥热带森林（SDTF）的核心，被称为多样化和特有现象的热点。尽管它很重要，但这个生物群落的采样仍然不足，导致其物种丰富度和组成的知识存在广泛的空白。在这项研究中，我们报告了两种仅分布在卡廷加且分布广泛的 Xenoc tenidae 物种。我们重新描述并图示了 Odo vittatus（Mello-Leito，1936），这是以前已知的唯一一种来自卡廷加的 Xenoc tenid 物种。我们将该物种转移到 Xenoctenus Mello-Leito，1938，该属目前仅在阿根廷、玻利维亚和哥伦比亚的六种物种中被发现。我们还新描述了 Xenoc tenus vittatus comb. nov. 的雄性，并提供了该物种的新记录，该物种以前仅从模式产地在卡廷加和附近的半干旱植被区被发现。我们还根据在卡廷加各地采集的雄性和雌性标本描述并图示了一个新物种，Xenoctenus kaatinga sp. nov.。此外，我们为 Xenoc tenus 提出了诊断特征，并重新描述了模式种 X. unguiculatus。
