Research Article |
Corresponding author: Xunyou Yan ( yanxunyou@163.com ) Corresponding author: Shuqiang Li ( lisq@ioz.ac.cn ) Academic editor: Zhiyuan Yao
© 2022 Yejie Lin, Xunyou Yan, Shuqiang Li.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Lin Y, Yan X, Li S (2022) Two new species of the genus Chilobrachys (Araneae, Theraphosidae) from China. ZooKeys 1081: 99-109. https://doi.org/10.3897/zookeys.1081.77072
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Two new species of the genus Chilobrachys Karsh, 1892 are described from China: Chilobrachys dominus Lin & Li, sp. nov. from Yunnan and C. jinchengi Lin & Li, sp. nov. from Tibet. Photos and a morphological description of the new species are given. The type specimens of the new species are deposited in the Institute of Zoology, Chinese Academy (
Asia, diagnosis, taxonomy, type
The family Theraphosidae Thorell, 1869 is one of the largest spider families in the world, including 1031 species in 153 genera (
Selenocosmiinae includes 125 species and subspecies in 12 genera. It can be distinguished from other subfamilies by the maxilla with an oval stridulatory organ on the prolateral surface, originating medially (not ventrally from the oral fringe), the maxilla with opposing modified setae in multiple rows on the retrolateral cheliceral surface, the posterior sternal sigillae distant from the sternal margins, the more than 60 labial cuspules, and the leg spines only found distally on the metatarsi; mature males lack a tibial apophysis on leg I (
Four Chilobrachys species were hitherto known from China (Fig.
All specimens are preserved in 75% ethanol and deposited in the Institute of Zoology, Chinese Academy of Sciences in Beijing (
The terminology used in the text and figures follows
A apical keel;
ALE anterior lateral eyes;
AME anterior median eyes;
MOA median ocular area;
PI prolateral inferior keel;
PLE posterior lateral eyes;
PME posterior median eyes;
PS prolateral superior keel.
Family Theraphosidae Thorell, 1869
Chilobrachys nitelinus Karsch, 1892.
See
The male of Chilobrachys dominus sp. nov. is similar to that of C. pococki (Thorell, 1897) in having a long, strongly curved embolus, but can be distinguished by the embolus bent in at two thirds (vs. halfway in C. pococki).
Male (holotype,
Male palpal bulb (Fig.
Female. unknown.
Known only from the type locality.
Holotype
♂ (
The male of Chilobrachys jinchengi sp. nov. is similar to that C. bicolor (
Male (holotype,
Male palpal bulb (Fig.
Female. unknown.
The manuscript benefited greatly from comments by Zhiyuan Yao, Danni Sherwood, Robert Raven. The English was checked by Sarah Crews. Jincheng Liu, Run Zhou, Zhengzhong Huang, Yi Ming and Xiaoqing Zhang helped in field collections.