Savarna huahin 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 huahin

description: Savarna huahin Yao & Li sp. nov.
Figs 5–6
Type material. Holotype: ♂ (IZCAS-Ar39735), Laplae Cave and Kailone Cave (12°36’15.30”N, 99°43’20.46”E, elevation 175 m), Nong Phlap Subdistrict, Hua Hin District, Prachuap Kiri Khan, Thailand, 30 October 2014, P. Wongprom leg. Paratypes: 1♂ (IZCAS-Ar39736), 2♀♀ (IZCAS-Ar39737–Ar39738), same data as holotype.
Etymology. The specific name is a noun in apposition and refers to the type locality.
Diagnosis. This species resembles S. kaeo Huber, Petcharad & Bumrungsri, 2015 (see Huber et al. 2015b: 5, figs 2–4, 14–29, 36–37) with similar male chelicerae (Fig. 6D) and female epigynum (Fig. 6A) but can be distinguished by large distal apophysis prolaterally (arrow in Fig. 5C) and short and wide, completely sclerotized distal apophysis retrolaterally (arrow in Fig. 5D) on procursus (prolateral apophysis small and retrolateral apophysis long and sclerotized only distally in S. kaeo), small distal apophysis on embolus (arrow 1 in Fig. 6C; absence in S. kaeo), and by presence of posteriorly constrictive vulval pore plates (Fig. 6B; not distinctly constrictive posteriorly in S. kaeo) and black marks on epigynal plate (arrow in Fig. 6H; absence of black marks medially in S. kaeo).
Description. Male (holotype, IZCAS-Ar39735): Total length 2.31 (2.48 with clypeus), prosoma 0.90 long, 1.08 wide, opisthosoma 1.41 long, 1.06 wide. Leg I: 20.09 (5.13 + 0.39 + 5.02 + 7.71 + 1.84), leg II: 15.04 (4.09 + 0.38 + 3.88 + 5.53 + 1.16), leg III: 11.26 (3.32 + 0.36 + 2.74 + 4.03 + 0.81), leg IV: 14.75 (4.31 + 0.36 + 3.63 + 5.61 + 0.84); tibia I L/d: 45; leg formula: I-II-IV-III. Distance PME-PME 0.20, diameter PME 0.10, distance PME-ALE 0.04, AME absent. Sternum wider than long (0.72/0.54). Habitus as in Figs 6 E–F. Dorsal shield of prosoma yellowish, with black marks laterally and narrow, dark median line behind ocular area; ocular area, clypeus and sternum black; Legs brown, but slightly whitish on distal parts of femora and tibiae, with darker rings on subdistal parts of femora and 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. Clypeus with pair of rounded processes at rim furnished with strong and long hairs. Chelicerae as in Fig. 6D, with pair of proximo-lateral apophyses. Palps as in Figs 5 A–B, trochanter with small dorsal apophysis (arrow in Fig. 5B) and long ventral apophysis proximally attached to femur; procursus simple proximally but complex distally, with two sclerotized distal apophyses (arrows in Figs 5 C–D), long subdistal apophysis ventrally and very large distal apophysis dorsally; bulb (Fig. 6C) with proximal sclerite and sclerotized embolus (provided with small distal apophysis, arrow 1 in Fig. 6C) apparently containing sperm duct (sperm duct opening visible, arrow 2 in Fig. 6C). Retrolateral trichobothrium of tibia I at 4% proximally; prolateral trichobothrium absent on tibia I, present on other tibiae; legs with short spines in single ventral rows on femur I and tibiae I–III, with vertical hairs in higher than usual density on all tibiae, without curved hairs; tarsus I with 13 distinct pseudosegments.
Female (paratype, IZCAS-Ar39737): Similar to male, habitus as in Figs 6 G–H. Total length 2.16 (2.34 with clypeus), prosoma 0.68 long, 0.90 wide, opisthosoma 1.48 long, 1.06 wide. Leg I: 16.23 (4.56 + 0.37 + 4.41 + 4.98 + 1.91), leg II: 11.87 (3.61 + 0.32 + 2.83 + 4.01 + 1.10), leg III: 8.33 (2.44 + 0.30 + 1.93 + 2.91 + 0.75), leg IV missing (see variation); tibia I L/d: 40. Distance PME-PME 0.13, diameter PME 0.10, distance PME-ALE 0.04, AME absent. Sternum slightly wider than long (0.62/0.52). Clypeus unmodified. Epigynum (Fig. 6A) slightly protruding, with pair of large humps laterally (arrows in Fig. 6A). Vulva (Fig. 6B) with curved anterior arch and pair of anteriorly wide and posteriorly narrow, long pore plates.
Variation: Tibia I in male paratype (IZCAS-Ar39736): 5.50. Tibia I in another female paratype (IZCAS- Ar39738): 6.98, leg IV: 12.49 (3.90 + 0.33 + 2.90 + 4.55 + 0.81).
Natural history. The species was found in the twilight zone of the Laplae Cave and Kailone Cave (karst area).
Distribution. Known from the two very close type localities (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 318-321, DOI: 10.11646/zootaxa.4778.2.4, http://zenodo.org/record/3856586