Guilotes Z. Zhao & S. Li

Li, Bing, Zhao, Zhe, Chen, Haifeng, Wu, Zhiyan, Zhang, Chuntian & Li, Shuqiang, 2018, Guilotes, a new genus of Coelotinae spiders from Guangxi Zhuang Autonomous Region, China (Araneae, Agelenidae), ZooKeys 802, pp. 1-17 : 3-4

Genus Guilotes Z. Zhao & S. Li gen. n. Figs 1, 2, 3, 4, 5, 6, 7, 8

Type species.

Guilotes ludiensis Z. Zhao & S. Li, sp. n.

Etymology.

The generic name is derived from the pinyin word “Gui”, referring to the Guangxi Zhuang Autonomous Region (Gui is a short name for Guangxi) where the genus is distributed, and “-lotes” as part of Notiocoelotes , which is similar to the new genus. The gender is masculine.

Diagnosis.

The males of the genus Guilotes are similar to those of the genus Notiocoelotes by cymbial furrow long (Figs 1C, 3C, 5C) and embolus long and filiform (Figs 1B, 3B, 5B), but can be distinguished by the chelicerae with 5-6 promarginal and five retromarginal teeth; the presence of a patellar apophysis (Figure 1C) and conductor short not reaching the embolus base (Figure 1B). The females of the genus Guilotes are similar to those of the genus Notiocoelotes by atrium oval and posterior (Figs 2A, 4A, 6A, 7A), hoods absent, copulatory ducts large, but can be distinguished by the chelicerae with 4-6 promarginal and 5-6 retromarginal teeth, the absence of a tongue-shaped atrial scape (Figure 2A), and the presence of two epigynal teeth (Figure 2A, absent in G. qingshitanensis sp. n. (Figure 4A)).

Description.

Medium sized spiders, with total length 4.17-8.66. Carapace yellowish brown; cephalic area, labium, endites and sternum brown; chelicerae dark brown (Figs 2 C–E, 4 C–E, 6 C–E, 7 C–E). Abdomen gray with dark gray chevron stripes (Figs 2 C–D, 4 C–D, 6 C–D, 7C). Spinnerets yellowish brown (Figs 2 C–E, 4 C–E, 6 C–E, 7 C–E). Legs yellowish brown with dark rings (Figs 2 C–E, 4 C–E, 6 C–E, 7 C–E). Chelicerae usually with 4-6 promarginal and 5-6 retromarginal teeth. Anterior lateral spinnerets larger than posterior median spinnerets but smaller than posterior lateral spinnerets; colulus slide-shaped; distal article of the spinneret longer than coxa. Leg formula 4123. Palp: patellar apophysis finger-shaped, RTA large and LTA small (Figs 1C, 3C, 5C). Cymbial furrow equal to (Figs 1C, 5C) or longer (Figure 3C) than 1/2 length of cymbium. Embolus long and filiform, beginning at 4 to 5 o’clock position (Figs 1B, 3B, 5B). Conductor short and broad with an outgrowth (Figs 1A, 3A, 5A) and a dorsal lamella (LC = lamella of conductor; Figs 1C, 3C, 5C). Median apophysis broad (Figs 1C, 5C) or thin, sharp and elongated (Figure 3C). Epigyne: with two teeth (Figs 2A, 6A, 7A, absent in G. qingshitanensis sp. n. (Figure 4A)). Atrium oval and posterior (Figs 2A, 4A, 6A, 7A). Hoods absent. Copulatory openings centrally located (on corners of the atrium; Figs 2A, 4A, 6A, 7A). Copulatory duct expanded and sac-like (Figs 2B, 6B, 7B) or elongate and convoluted (Figure 4B). Spermathecae long, spermathecae heads long, stretched to the back (Figs 2B, 4B, 6B, 7B).

Natural history.

All species of this genus were collected from moist caves with soluble rock.

Comments.

The new genus was supported as monophyletic within the Guangxi Coelotes group ( Zhao and Li 2017: 993, figure 3 - see ZZ391, ZZ392, ZZ890, and ZZ892). Males and females of each species were collected from the same caves and double-checked using DNA barcoding.

The divergence time analyses showed the split of Guilotes gen. n. and other close related clades early than 30 million years ago ( Zhao and Li 2017: figure 3, S8). Guilotes and Notiocoelotes are very similar in morphology and present similar distribution areas ( Wang et al. 2008, Liu et al. 2010, Zhang et al. 2016b); thus, it is meaningful to distinguish between them.

Distribution.

Guangxi Zhuang Autonomous Region, China (Figure 8).