Pholcus schwendingeri 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, pp. 1-55: 44-47

publication ID

10.5852/ejt.2016.190

publication LSID

lsid:zoobank.org:pub:urn:lsid:zoobank.org:pub:BE92596B-62D9-46CD-8486-CF6B36C640B11

persistent identifier

http://treatment.plazi.org/id/7F7187D5-4E67-7004-FDBD-C175CF93FB8B

treatment provided by

Jeremy

scientific name

Pholcus schwendingeri Huber, 2011
status

 

Pholcus schwendingeri Huber, 2011 

Figs 150–152View Figs 143 – 152, 171–183View Figs 169 – 172View Figs 173 – 183, 190–192View Figs 184 – 192

Pholcus schwendingeri Huber, 2011: 183  –184, figs 761–763, 823–825 (♂).

Diagnosis

Easily distinguished from congeners by combination of very long male eye stalks ( Figs 173–174View Figs 173 – 183), by male palpal morphology (twisted segments; strong trochanter apophysis; procursus with large prolateral process; simple appendix; absence of uncus; Figs 178–180View Figs 173 – 183; see also figs 823–824 in Huber 2011); from other species in buatong  group also by female internal genitalia ( Fig. 192View Figs 184 – 192; wider than long in contrast to Ph. satun  ; with angular anterior ‘valve’ in contrast to Ph. buatong  sp. nov.).

New material examined

THAILAND: 3 ♂♂, 9 ♀♀, ZFMK ( Ar 15049–50), Ranong, Klong Nakha Wildlife Sanctuary (9°27.6' N, 98°30.7' E) (type locality), 40 m a.s.l., forest, leaf litter, 12 Mar. 2015 (B.A. Huber, B. Petcharad)GoogleMaps  ; 4 ♀♀, in absolute ethanol, ZFMK ( Mal 362), same dataGoogleMaps  ; 20 ♂♂, 12 ♀♀, ZFMK ( Ar 15051–52), Surat Thani, Khao Sok National Park, forest along nature trail (8°54.8' N, 98°29.3'– 98°30.5' E), leaf litter, 110–160 m a.s.l., 11–12 Mar. 2015 (B.A. Huber, B. Petcharad)GoogleMaps  ; 3 ♀♀, 3 juvs, in absolute ethanol, ZFMK ( Mal 355), same dataGoogleMaps  ; 8 ♂♂, 10 ♀♀, ZFMK (7 ♂♂, 9 ♀♀, Ar 15053–54) and PSUZC (1 ♂, 1 ♀), Krabi  , Khao Phanom Bencha National Park, trails near headquarters (8°14.1' N, 98°55.1' E), 150–300 m a.s.l., leaf litter in forest, 8 Mar. 2015 (B.A. Huber, B. Petcharad)GoogleMaps  ; 5 ♀♀, 1 juv., in absolute ethanol, ZFMK ( Mal 339), same data  ; 1 ♂, RMNH, Khao Phanom Bencha National Park , 15 Dec. 1990 (C.L. & P.R. Deeleman)  .

Description

Male – amendments

Males from Khao Sok are significantly larger than males from Phanom Bencha: tibia 1 in 19 males from Khao Sok: 7.4–8.9 (mean 8.0); in 7 males from Phanom Bencha: 6.6–7.3 (mean 7.0). This difference is even more pronounced in eye stalk length: in 19 males from Khao Sok: 0.70–0.78 (mean 0.74); in 8 males from Phanom Bencha: 0.53–0.60 (mean 0.55). Males from Klong Nakha seem to be intermediate (low sample size). Angle between eye stalks varies even within localities (compare Figs 150 and 151View Figs 143 – 152). All males with process between eye stalks ( Fig. 177View Figs 173 – 183). Male tibia 2/tibia 4 length: 1.08. Patella dorsally widened, resulting in an angle between femur and patella of ~125° (lateral view; in figures 823 and 824 in Huber 2011, femora and patellae are not in perfect lateral view). Male gonopore with four epiandrous spigots ( Fig. 181View Figs 173 – 183). ALS as in female (see below).

Female

In general similar to male ( Fig. 152View Figs 143 – 152), but eye triads on low humps and closer together ( Fig. 175View Figs 173 – 183; distance PME-PME: 185 µm); black marks in place of AME, but without lenses; clypeus unmodified. Tibia 1 in 10 females from Khao Sok: 5.6–6.3 (mean 6.0); in 9 females from Klong Nakha: 5.3–6.3 (mean: 5.7); in 10 females from Phanom Bencha: 4.7–5.5 (mean 5.3). Epigynum wider than long, mostly weakly sclerotized, with large dark ‘knob’ at posterior margin ( Fig. 182View Figs 173 – 183), anterior internal arch visible through cuticle ( Figs 171View Figs 169 – 172, 190–191View Figs 184 – 192). Internal genitalia as in Figs 172View Figs 169 – 172 and 192View Figs 184 – 192. ALS with one widened, one pointed, and several (apparently six) smaller cylindrically-shaped spigots of varying sizes ( Fig. 183View Figs 173 – 183).

Natural history

At all three localities, the species was fairly abundant in suitable forest patches with large numbers of large dead leaves on the ground. The poorly visible webs were closely attached to the lower leaf surface. The spiders barely reacted to disturbance.

Distribution

Known from three localities in southern Thailand ( Fig. 153View Fig. 153).

ZFMK

Germany, Bonn, Zoologische Forschungsinstitut und Museum "Alexander Koenig"

PSUZC

PSUZC

RMNH

Netherlands, Leiden, Nationaal Natuurhistorische Museum ("Naturalis") [formerly Rijksmuseum van Natuurlijke Historie]

AME

USA, Florida, Gainesville, University of Florida, Florida Museum of Natural History, Allyn Museum

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Pholcidae

Genus

Pholcus

Loc

Pholcus schwendingeri Huber, 2011

Berhard A. Huber, Booppa Petchard, Charles Leh Moi Ung, Joseph K. H. Koh & Amir R. M. Ghazali 2016

2016
Loc

Pholcus schwendingeri

Huber 2011: 183

2011