Pholcus satun Huber, 2011

Berhard A. Huber, Booppa Petchard, Charles Leh Moi Ung, Joseph K. H. Koh & Amir R. M. Ghazali, 2016, The Southeast Asian Pholcus halabala species group (Araneae, Pholcidae): new data from field observations and ultrastructure, European Journal of Taxonomy 190 (190), pp. 1-55 : 43

Pholcus satun Huber, 2011

Figs 147–149 , 169–170 , 187–189

Pholcus satun Huber, 2011: 144 , figs 515–516, 580–582 (♂).

Diagnosis

Easily distinguished from all known congeners by long sickle-shaped bulbal process and by unique shape of procursus (long, S-shaped, with subdistal ventral pointed process; fig. 580 in Huber 2011); from other species in the buatong group also by longer than wide female internal genitalia ( Fig. 170 ).

New material examined

THAILAND: 1 ♀, in absolute ethanol, ZFMK ( Mal 328 ), Satun , Thaleban National Park (6°42.6' N, 100°10.2' E) (type locality), forest near headquarters , 110 m a.s.l., leaf litter, 5 Mar. 2015 (B.A. Huber, B. Petcharad) .

MALAYSIA: 1 ♀, ZFMK ( Ar 15047 ), Kedah, Gunung Jerai, forest near Sri Perigi Waterfall (5°48.3' N, 100°24.6' E), 100–200 m a.s.l., 27 Feb. 2015 (B.A. Huber) ; 2 ♀♀, 1 juv., in absolute ethanol, ZFMK ( Mal 288 ), same data ; 1 ♂, ZFMK ( Ar 15048 ), same data, collected penultimate, adult on 2–3 Mar. 2015 .

Description (female)

In general similar to male ( Fig. 149 ; cf. Huber 2011), but eye triads on low humps and closer together (distance PME-PME: 185 µm) and black mark at ocular area smaller. AME present as in male. Tibia 1 in 3 females: 5.5, 5.6, 6.1. Epigynum longer than wide, mostly weakly sclerotized, with large dark ‘knob’ at posterior margin, anterior internal arch visible through cuticle ( Figs 169 , 187–188 ); posterior plate laterally slightly more sclerotized. Internal genitalia as in Figs 170 and 189 .

Distribution

Known from two localities in southern Thailand and northern mainland Malaysia ( Fig. 153 ).

Figures

Fig. 153. Known distributions of the Pholcus buatong species group (Malay Peninsula) and of the Pholcus andulau species group (northern Borneo).

Figs 143 – 152. Live specimens, Pholcus buatong Huber, sp. nov. (143 – 146), Ph. satun Huber, 2011 (147 – 149), and Ph. schwendingeri Huber, 2011 (150 – 152). 143 – 145. ♂♂ and ♀ from Tham Buatong, Thailand. 146. ♂ from Tham Khao Phueng, Thailand. 147 – 149. Adult ♂, penultimate instar ♂, and ♀ from Gunung Jerai, Malaysia. 150 – 151. ♂♂ from Khao Sok, Thailand. 152. ♀ with egg-sac, from Phanom Bencha, Thailand.

Figs 169 – 172. Cleared female genitalia, ventral and dorsal views. 169 – 170. Pholcus satun Huber, 2011, ZFMK ‘ Mal 328 ’. 171 – 172. Ph. schwendingeri Huber, 2011, ZFMK Ar 15050. Scale lines: 0.5 mm.

Figs 184 – 192. Female genitalia, untreated in ventral view, cleared in ventral and dorsal views. 184 – 186. Pholcus buatong Huber, sp. nov. 187 – 189. Ph. satun Huber, 2011. 190 – 192. Ph. schwendingeri Huber, 2011.