Savarna chiangmai 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 chiangmai

description: Savarna chiangmai Yao & Li sp. nov.
Figs 3–4
Type material. Holotype: ♂ (IZCAS-Ar39730), Tham Mongkhon Wissuti Taeb Cave (19°34’2.87”N, 99°10’6.53”E, elevation 662 m), Chiangmai, Thailand, 27 June 2014, P. Wongprom leg. Paratypes: 2♂♂ (IZCAS-Ar39731– Ar39732), 2♀♀ (IZCAS-Ar39733–Ar39734), same data as holotype.
Etymology. The specific name is a noun in apposition and refers to the type locality.
Diagnosis. This species resembles S. bannang sp. nov. (Figs 1–2) with similar embolus (Fig. 4C), male chelicerae (Fig. 4D) and epigynum (Fig. 4A) and S. kraburiensis Wongprom & Wiwatwitaya, 2015 (see Wongprom & Wiwatwitaya 2015: 2, figs 1–2) with similar male chelicerae (Fig. 4D) but can be distinguished by presence of angular subdistal sclerite dorsally (arrow 1 in Fig. 3C), short distal spine prolaterally (arrow 2 in Fig. 3C) and two small, distal membranous processes (arrows 1 and 2 in Fig. 3D) on procursus and by presence of wavy vulval anterior arch and long elliptic vulval pore plates (Fig. 4B); also distinguished from S. kraburiensis by short and wide embolus (Fig. 4C), by slightly protruding epigynum (Fig. 4A) and by elliptic vulval pore plates (Fig. 4B).
Description. Male (holotype, IZCAS-Ar39730): Total length 2.49 (2.63 with clypeus), prosoma 0.90 long, 0.96 wide, opisthosoma 1.59 long, 1.08 wide. Leg I: 27.11 (7.02 + 0.41 + 6.58 + 10.54 + 2.56), leg II: 17.44 (4.99 + 0.38 + 4.17 + 6.67 + 1.23), leg III: 12.95 (3.83 + 0.35 + 3.14 + 4.72 + 0.91), leg IV: 14.21 (4.16 + 0.36 + 3.32 + 5.43 + 0.94); tibia I L/d: 59; leg formula: I-II-IV-III. Distance PME-PME 0.15, diameter PME 0.12, distance PME- ALE 0.05, AME absent. Sternum wider than long (0.74/0.56). Habitus as in Figs 4 E–F. Dorsal shield of prosoma yellowish, with brown margins and wide, brown median stripe behind ocular area; ocular area brown, but yellowish medially; clypeus brown; sternum black. Legs brownish, but slightly whitish on distal parts of femora and tibiae, with darker rings on subdistal parts of femora and proximal, median and subdistal parts of tibiae. Opisthosoma yellowish, with black subcuticular spots lying above deeper white spots dorsally and laterally and distinct ventral pattern consisting of three interconnected black marks. Ocular area elevated, each eye triad on top of short, laterally directed hump. Thoracic furrow deep. Chelicerae as in Fig. 4D, with pair of proximo-lateral apophyses. Palps as in Figs 3 A–B, trochanter with small dorsal apophysis (arrow in Fig. 3A) and long ventral apophysis proximally attached to femur (Fig. 3B); procursus simple proximally but complex distally, with angular subdistal sclerite dorsally (arrow 1 in Fig. 3C), short distal spine prolaterally (arrow 2 in Fig. 3C) and two small, distal membranous processes (arrows 1 and 2 in Fig. 3D); bulb (Fig. 4C) with proximal sclerite and sclerotized embolus (provided with large, sclerotized distal apophysis, arrow 1 in Fig. 4C) apparently containing sperm duct (sperm duct opening visible, arrow 2 in Fig. 4C). Retrolateral trichobothrium of tibia I at 8% proximally; prolateral trichobothrium absent on tibia I, present on other tibiae; legs with vertical hairs in higher than usual density on all tibiae, without short spines and curved hairs; tarsus I with 19 distinct pseudosegments.
Female (paratype, IZCAS-Ar39733): Similar to male, habitus as in Figs 4 G–H. Total length 2.72 (2.84 with clypeus), prosoma 0.88 long, 0.88 wide, opisthosoma 1.84 long, 1.48 wide. Legs I and IV missing (see variation), leg II: 14.43 (4.16 + 0.35 + 3.44 + 5.23 + 1.25), leg III: 10.09 (3.11 + 0.31 + 2.34 + 3.52 + 0.81). Distance PME- PME 0.14, diameter PME 0.11, distance PME-ALE 0.04, AME absent. Sternum slightly wider than long (0.62/0.52). Ocular area black, but brown medially. Epigynum (Fig. 4A) slightly protruding. Vulva (Fig. 4B) with wavy anterior arch and pair of long elliptic pore plates.
Variation: Tibia I in one male paratype (leg I missing in another specimen): 6.01 (IZCAS-Ar39731). In another female paratype (IZCAS-Ar39734): Leg I: 22.23 (5.19 + 0.37 + 5.08 + 9.12 + 2.47), leg IV: 13.72 (4.14 + 0.33 + 3.31 + 5.10 + 0.84); tibia I L/d: 46.
Natural history. The species was found in the twilight zone of the Tham Mongkhon Wissuti Taeb 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 315-318, DOI: 10.11646/zootaxa.4778.2.4, http://zenodo.org/record/3856586