Savarna huahin Yao & Li, 2020

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, Zootaxa 4778 (2), pp. 311-328 : 318-321

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 ).

Figures

FIGURE 5. Savarna huahin sp. nov., holotype male.A–B. Palp (A. Prolateral view; B. Retrolateral view, arrow points at dorsal apophysis); C–D. Distal part of procursus (C. Prolateral view, arrow points at sclerotized distal apophysis prolaterally; D. Retrolateral view, arrow points at sclerotized distal apophysis retrolaterally). b = bulb, e = embolus, pr = procursus, tr = trochanter. Scale bars: 0.10 (A–B), 0.05 (C–D).

FIGURE 6. Savarna huahin sp. nov., holotype male (C–F) and paratype female (A–B, G–H). A. Epigynum, ventral view, arrows point at pair of large humps; B. Vulva, dorsal view; C. Bulbal process, prolateral view, arrow 1 points at small distal apophysis, arrow 2 points at sperm duct opening; D. Chelicerae, frontal view; E–H. Habitus (E, G. Dorsal view; F. Lateral view; H. Ventral view, arrow points at black marks medially). b = bulb, e = embolus, pa = proximo-lateral apophysis, pp = pore plate. Scale bars: 0.10 (A–D), 0.50 (E–H).

FIGURE 11. Known distribution records of new Savarna species from Thailand. 1. Savarna bannang sp. nov.; 2. S. chiangmai sp. nov.; 3. S. huahin sp. nov.; 4. S. satun sp. nov.; 5. S. thungsong sp. nov.