Micythus torquentus Cui 2023, sp.nov.
Creators: name: Cui, Bohan
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Gnaphosidae
Micythus
Micythus torquentus

description: Micythus torquentus sp.nov.
Type material: Holotype male, Chengmai, Hainan Province, China, April 2020, leg. Xinghui Chen.
Paratype: 1m, Chengmai, Hainan Province, China, April 2020, leg. Xinghui Chen; 2f, Chengmai, Hainan Province, China, March 5 th, 2022, leg. Xinghui Chen.
Etymology. The species is named according to its twisted RTA.
Diagnosis. This new species is similar to M. pictus (Thorell,1897), but male can be distinguished from the warp on RTA, and the shape of the conductor. RTA of the new species is rectangular and a bit bifurcated at the end in retrolateral view, but cuneate in M.pictus; RTA is obviously twisted in ventral view. Tibiae I, II only spined on the ventral side.
Female of the new species is a bit similar to M. rangunensis (Thorell, 1895), but they can be distinguished from the shape of the spermathecae. Spermathecae in M. rangunensis is sausage-like (Deeleman-Reinhold, 2001), but in the new species it becomes obviously constricted in the middle.
Description (Figures 1–2). Male holotype (Figure 1A, Figure 2) total length 5.19. Carapace orange, length 2.36, width 1.80, length/width 1.31; Thoracic groove brown; radial groove dark grey, forked; fovea deep, longitudinal, black line shaped. AME-AME=0.04, AME-ALE=0.03, PME-PME=0.08, PME-PLE=0.04. AER strongly procurved. PER nealry straight, white. Chelicerae anteriorly with long setae, promargin with three teeth, retromargin with a small tooth. Labium tongue-shaped, longer than wide, brown, the upper end less colored with macrosetae. Endites light brown, longer than wide, anterior edge white, hollow in the middle. Sternum orange, oval, with small setae and coxa apophysis. Legs the same color with the carapace. Leg III with a shallow notch on trochanter, trochanter IV with a deep notch. Leg spination pattern (following Song et al., 2004): femora: I, II d1-1-1, p0-1-1; III d1-1-1, p0-1-1, r0-1-1; IV d1-1-1, r0-0-1; patellae: none; tibiae: I, II v0-1-1; III p2-1-1, r0-1-1, v2-2-2;IV p1-0-1, r1-0-1, v2-2-2; metatarsi: I, II v2-0-0; III d0-2-0,p1-0-1, r1-0-1, v2-2-2; IV d0-2-2, p1-1-0, r0-1-1, v2-2-2. Leg formula: 4123. Metatarsus I, II and tarsus I, II with ventral scopula; tarsal claws thin.
Leg measurements:
Abdomen grey, length 2.25, width 1.47, length/width 1.53, with a small triangular dorsal scutum. Spinnerets long, light brown.
Male palp (Figure 2): tibia short, as long as wide, with a tongue-shaped retrolateral apophysis in retrolateral view. RTA evidently curved, with furcating terminal end. Tegulum narrow; seminal duct U-shaped. Embolus short. Conductor thin and curved. Median apophysis unconspicuous.
Female (Figures 1B–D) total length 6.17. Carapace length 2.97, width 2.23, length/width 1.33. AME-AME 0.08, AME-ALE 0.02, PME-PME 0.13, PME-PLE 0.14. Abdomen length 3.12, width 2.09, length/width 1.49. Leg measurements: I 6.05 (1.84, 2.30, 1.12, 0.79); II 6.19 (1.87, 2.31, 1.19, 0.82); III 6.16 (1.81, 2.15, 1.36, 0.84); IV 8.01 (2.23, 2.81, 2.11, 0.86). Leg fomula: 4231. Appearance of cephalothorax as male.
Epigyne (Figures 1C–D) nearly U-shaped in ventral view. Spermathecae long, divided into two lobes, the ventral one larger. The second pair of spermathecal lobes thick-walled, bubble-shaped. Copulatory opening almost oval.
description: Published as part of Cui, Bohan, 2023, A new species of genus Micythus Thorell, 1897 (Araneae: Gnaphosidae) from Hainan, China, pp. 397-400 in Zootaxa 5301 (3) on pages 397-398, DOI: 10.11646/zootaxa.5301.3.5, http://zenodo.org/record/8030536