Pholcus erawan 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: 15-17

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/7F7187D5-4E42-703A-FD90-C584C851F933

treatment provided by

Jeremy

scientific name

Pholcus erawan Huber, 2011
status

 

Pholcus erawan Huber, 2011 

Figs 13–16View Figs 9 – 16, 39–48View Figs 39 – 48

Pholcus erawan Huber, 2011: 297  –298, figs 1374–1375, 1404–1405, 1466–1470 (♂ ♀).

Diagnosis

Easily distinguished from putatively closest known relatives (other species in the halabala  core group) by absence of dorsal flap on procursus, by long whitish process of male palpal tarsus (fig. 1467 in Huber 2011), by unique shapes of bulbal processes (fig. 1644 in Huber 2011), and by much longer than wide female internal genitalia and small oval pore plates (fig. 1470 in Huber 201 1).

New material examined

THAILAND: 8 ♂♂, 9 ♀♀, ZFMK (7 ♂♂, 8 ♀♀, AR 15016–17)GoogleMaps  and PSUZC (1 ♂, 1 ♀), Kanchanaburi, Erawan National Park (14°22.2' N, 99°08.75' E), 85 m a.s.l., forest along stream, on leaves, 15 Mar. 2015 (B.A. Huber, B. Petcharad)GoogleMaps  ; 2 ♂♂, 7 ♀♀, in absolute ethanol, ZFMK ( Mal 378), same dataGoogleMaps  ; 1 ♂, 1 ♀, ZFMK ( Ar 15018), Nakhon Si Thammarat, Khao Nan National Park (8°46.2' N, 98°48.1' E), 250–300 m a.s.l., on leaves in forest, 9 Mar. 2015 (B.A. Huber, B. Petcharad)GoogleMaps  ; 1 ♂, ZFMK ( Ar 15019), same data, collected penultimate, adult on 11 Mar. 2015GoogleMaps  ; 3 juvs, in absolute ethanol, ZFMK ( Mal 345), same dataGoogleMaps  ; 3 ♂♂, 3 ♀♀, ZFMK ( Ar 15020), Nakhon Si Thammarat, Khao Nan National Park (8°46.23' N, 98°48.27' E), 100 m a.s.l., on palm leaves near park buildings, 9 Mar. 2015 (B.A. Huber, B. Petcharad)GoogleMaps  ; 1 ♂, ZFMK ( Ar 15021), same data, collected penultimate, adult on 12 Mar. 2015GoogleMaps  ; 2 ♂♂, ZFMK ( Ar 15022), Krabi  , Khao Phanom Bencha National Park, trails near headquarters (8°14.1' N, 98°55.1' E), 150–300 m a.s.l., on leaves, 8 Mar. 2015 (B.A. Huber, B. Petcharad)GoogleMaps  ; 4 ♀♀, 4 juvs, in absolute ethanol, ZFMK ( Mal 340), same dataGoogleMaps  .

MALAYSIA: 2 ♂♂, 5 ♀♀, ZFMK ( Ar 15023), Kedah, Gunung Jerai, forest near Sri Perigi Waterfall (5°48.3' N, 100°24.6' E), 100–200 m a.s.l., on leaves, 27 Feb. 2015 (B.A. Huber)GoogleMaps  ; 1 ♀, 6 juvs, in absolute ethanol, ZFMK ( Mal 291), same dataGoogleMaps  ; 4 ♂♂, 3 ♀♀, 1 juv., ZFMK ( Ar 15024), Pulau Pinang, Penang National Park near Teluk Bahang (5°27.7' N, 100°12.1' E), 10–50 m a.s.l., on leaves, 28 Feb. 2015 (B.A. Huber)GoogleMaps  ; 1 ♂, ZFMK ( Ar 15025), same data, collected penultimate, adult on 2 Mar. 2015GoogleMaps  ; 1 ♂, 1 ♀, 1 juv., in absolute ethanol, ZFMK ( Mal 296), same dataGoogleMaps  .

Description – amendments

Carapace pattern slightly variable, ranging from two separate V-marks ( Fig. 15View Figs 9 – 16) to medially fused V-marks to almost completely fused single posterior mark ( Fig. 14View Figs 9 – 16). Females and juveniles with more delicate V-marks. Sternum coloration also slightly variable, from almost monochromous whitish to small black posterior marks (males) and larger black posterior marks (females). Tibia 1 in 21 males: 6.3–8.1 (mean 7.1); in 20 females: 5.8–6.7 (mean 6.3). In most males, except those from the type locality ( Erawan  ), the ventro-distal sclerite of the procursus is slightly more pointed than illustrated in Huber 2011 (fig. 1467). Male ocular area with dense brush of stronger hairs, but without spines ( Fig. 43View Figs 39 – 48); tarsus 4 comb-hairs of the simplified Pholcus  - type (cf. Huber & Fleckenstein 2008), with three lateral tines ( Fig. 46View Figs 39 – 48); procursus with retrolateral distal pocket ( Fig. 41View Figs 39 – 48); distal male cheliceral apophyses with two cone-shaped teeth (modified hairs) each ( Fig. 39View Figs 39 – 48); gonopore with four epiandrous spigots ( Fig. 44View Figs 39 – 48); ALS with one widened, one pointed, and six smaller cylindrically shaped spigots of varying sizes ( Fig. 45View Figs 39 – 48; pointed spigot damaged in this spinneret).

Natural history

As noted above, Ph. erawan  was sometimes found at the same localities as Ph. halabala  but on monocot rather than dicot leaves. Only at Erawan  , this species seemed to occur on all kinds of leaves, preferably (but not only) large ones. At Khao Nan, Ph. erawan  was found on palm leaves both in the forest and in the garden near the park buildings. At Penang, specimens were found both on green leaves and on dead brown leaves still attached to the plant. Small silk tufts were observed in the webs at most localities. At night (at Erawan  ), spiders were observed moving among the vegetation.

Distribution

Widely distributed on the Malay Peninsula, reaching northern Laos ( Fig. 17View Fig. 17).

ZFMK

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

PSUZC

PSUZC

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Pholcidae

Genus

Pholcus

Loc

Pholcus erawan Huber, 2011

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

2016
Loc

Pholcus erawan

Huber 2011: 297

2011