Savarna bannang Lan & Yao & Zheng & Wongprom & Li 2020, sp. nov.
Creators: name: Lan, Tianqi
name: Yao, Zhiyuan
name: Zheng, Guo
name: Wongprom, Prasit
name: Li, Shuqiang
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Pholcidae
Savarna
Savarna bannang

description: Savarna bannang Yao & Li sp. nov.
Figs 1–2
Type material. Holotype: ♂ (IZCAS-Ar39725), Rad Cave (6°16’27.7’’N, 101°15’2.8’’E, elevation 52 m), Ban- nang District, Yala, Thailand, 22 October 2015, P. Wongprom leg. Paratypes: 2♂♂ (IZCAS-Ar39726–Ar39727), 2♀♀ (IZCAS-Ar39728–Ar39729), same data as holotype.
Etymology. The specific name is a noun in apposition and refers to the type locality.
Diagnosis. The species resembles S. chiangmai sp. nov. (Figs 3–4) with similar embolus (Fig. 2C), male chelicerae (Fig. 2D) and epigynum (Fig. 2A) and S. tesselata (Simon, 1901) (see Huber 2005: 78, figs 129–130, 138–140; Huber et al. 2015b: 12, figs 11–13, 32–33, 40–41, 63–73) with male chelicerae (Fig. 2D) but can be distinguished by presence of long, spine-shaped subdistal sclerite dorsally (arrow 1 in Fig. 1C), curved distal apophysis prolaterally (arrow 2 in Fig. 1C) and two large, distal membranous processes (arrows 3 and 4 in Fig. 1C) on procursus and by presence of large, elliptic vulval pore plates (Fig. 2B); also distinguised from S. chiangmai sp. nov. by presence of ridge-shaped vulval anterior arch (Fig. 2B); also distinguished from S. tesselata by short and wide embolus (Fig. 2C) and by absence of medial posterior lip on epigynum (Fig. 2A).
Description. Male (holotype, IZCAS-Ar39725): Total length 2.78 (2.96 with clypeus), prosoma 0.86 long, 1.02 wide, opisthosoma 1.92 long, 1.28 wide. Leg I: 30.39 (7.51 + 0.43 + 7.24 + 12.30 + 2.91), leg II: 21.46 (5.93 + 0.42 + 5.19 + 8.08 + 1.84), leg III: 14.16 (4.22 + 0.35 + 3.34 + 5.03 + 1.22), leg IV: 18.33 (5.32 + 0.36 + 4.36 + 7.04 + 1.25); tibia I L/d: 59; leg formula: I-II-IV-III. Distance PME-PME 0.18, diameter PME 0.15, distance PME-ALE 0.03, AME absent. Sternum slightly wider than long (0.72/0.66). Habitus as in Figs 2 E–F. Dorsal shield of prosoma yellowish, with black margins and wide, dark median stripe behind ocular area; ocular area and clypeus dark brown; sternum black. Legs brown, but slightly whitish on distal parts of femora and tibiae, with darker rings on subdistal parts of femora and proximal and subdistal parts of tibiae. Opisthosoma yellowish, with black subcuticular spots lying above deeper white spots dorsally and laterally and wide black stripe ventrally. Ocular area elevated, each eye triad on top of short, laterally directed hump. Thoracic furrow deep. Chelicerae as in Fig. 2D, with pair of proximo-lateral apophyses. Palps as in Figs 1 A–B, trochanter with small dorsal apophysis (arrow in Fig. 1A) and long ventral apophysis proximally attached to femur; procursus simple proximally but complex distally, with long, spine-shaped subdistal sclerite dorsally (arrow 1 in Fig. 1C), curved distal apophysis prolaterally (arrow 2 in Fig. 1C) and two large, distal membranous processes (arrows 3 and 4 in Fig. 1C); bulb (Fig. 2C) with proximal sclerite and sclerotized embolus (provided with large, sclerotized distal apophysis, arrow 1 in Fig. 2C) apparently containing sperm duct (sperm duct opening visible, arrow 2 in Fig. 2C). Retrolateral trichobothrium of tibia I at 6% proximally; prolateral trichobothrium absent on tibia I, present on other tibiae; legs with short spines in single ventral row on femur I, with vertical hairs in higher than usual density on all tibiae, without curved hairs; tarsus I with 14 distinct pseudosegments.
Female (paratype, IZCAS-Ar39728): Similar to male, habitus as in Figs 2 G–H. Total length 2.90 (3.08 with clypeus), prosoma 0.74 long, 0.92 wide, opisthosoma 2.16 long, 1.48 wide. Leg I: – (7.01 + 0.43 + 6.54 + 10.79 + –), femur II: 5.22 (other segments missing), leg III: 13.05 (3.83 + 0.38 + 3.17 + 4.43 + 1.24), leg IV: 17.25 (5.14 + 0.38 + 4.16 + 6.33 + 1.24); tibia I L/d: 55. Distance PME-PME 0.16, diameter PME 0.10, distance PME-ALE 0.04, AME absent. Sternum slightly wider than long (0.64/0.52). Epigynum (Fig. 2A) slightly protruding. Vulva (Fig. 2B) with ridge-shaped anterior arch and pair of large elliptic pore plates.
Variation: Tibia I in male paratypes (n = 2): 7.06 (IZCAS-Ar39726), 7.21 (IZCAS-Ar39727). Legs I and II missing in another female paratype (IZCAS-Ar39729).
Natural history. The species was found in the twilight zone of the Rad Cave (karst area).
Distribution. Known only from the type locality (Fig. 11).
description: Published as part of Lan, Tianqi, Yao, Zhiyuan, Zheng, Guo, Wongprom, Prasit & Li, Shuqiang, 2020, Five new species of the spider genus Savarna Huber, 2005 (Araneae: Pholcidae) from Thailand, pp. 311-328 in Zootaxa 4778 (2) on pages 312-315, DOI: 10.11646/zootaxa.4778.2.4, http://zenodo.org/record/3856586