Panjange kubah Huber

Bernhard A. Huber & Charles Leh Moi Ung, 2016, The Panjange nigrifrons group in Borneo (Araneae: Pholcidae): high diversity in Sarawak, apparent absence in Sabah, European Journal of Taxonomy 184 (184), pp. 1-32 : 22-25

publication ID

https://doi.org/ 10.5852/ejt.2016.184

publication LSID

lsid:zoobank.org:pub:AC6509DC-B848-4645-BCD9-35BF0BE263F1

DOI

https://doi.org/10.5281/zenodo.6063220

persistent identifier

https://treatment.plazi.org/id/CF978A33-4706-4705-8245-86776DB7E34C

taxon LSID

lsid:zoobank.org:act:CF978A33-4706-4705-8245-86776DB7E34C

treatment provided by

Jeremy

scientific name

Panjange kubah Huber
status

sp. nov.

Panjange kubah Huber View in CoL , sp. nov.

urn:lsid:zoobank.org:act:CF978A33-4706-4705-8245-86776DB7E34C

Figs 6 View Figs 2 – 7 , 63–64 View Figs 61 – 68 , 69–81 View Figs 69 – 73 View Figs 74 – 81 , 89–91 View Figs 86 – 94

Panjange Bor 109: Huber & Nuñeza 2015: 5, 43–44.

Diagnosis

Easily distinguished from most congeners by distinctive transversal sclerite on procursus ( Fig. 70 View Figs 69 – 73 ); from very similar Pa. seowi sp. nov. by other details of procursus (unique prolateral process, Figs 69 View Figs 69 – 73 , 77–78 View Figs 74 – 81 ; distal element longer, Fig. 70 View Figs 69 – 73 ; absence of prolateral ridges on procursus, Fig. 69 View Figs 69 – 73 ). Females are easily distinguished from Pa. nigrifrons by short scape but difficult to distinguish externally from other congeners in Sarawak (distinctive shape of pore plates and pair of median sclerites; similar only in Pa. seowi sp. nov.).

Etymology

Named for the type locality; noun in apposition.

Type material

MALAYSIA-BORNEO: holotype, Ƌ, Sarawak, National Park, along Waterfall Trail (1.596– 1.606° N, 110.180– 110.187° E), 200–300 m a.s.l., 12 Jul. 2014 (B.A. Huber, S.B. Huber), ZFMK ( Ar 14586 ) GoogleMaps .

Other material examined

MALAYSIA-BORNEO, Sarawak: 2 ƋƋ, 7 ♀♀, same data as holotype, ZFMK ( Ar 14587-88 ) GoogleMaps ; 2 ♀♀, 2 juvs, same data, in absolute ethanol, ZFMK ( Bor 189 ) GoogleMaps .

Description

Male (holotype)

MEASUREMENTS. Total body length 4.5, carapace width 1.2. Leg 1: 42.0 (9.3 + 0.5 + 9.6 + 20.1 + 2.5), tibia 2: 6.1, tibia 3: 3.6, tibia 4: 5.6; tibia 1 L/d: 99. Distance PME-PME 445 µm, diameter PME 105 µm, distance PME–ALE ~45 µm; AME absent.

COLOR. Carapace pale ochre yellow to whitish, posterior mark ( Fig. 63 View Figs 61 – 68 ) lost in ethanol, ocular area and clypeus dark brown (black in life), without black marks in AME area; sternum whitish; legs ochreorange with dark brown patellae and tibia-metatarsus joints; abdomen ochre-gray, with black marks dorsally, monochromous ventrally.

BODY. Habitus as in Figs 63–64 View Figs 61 – 68 ; ocular area raised, each triad on medium long stalk, without pointed process (cf. Fig. 6 View Figs 2 – 7 ); carapace without median furrow; clypeus unmodified; sternum wider than long (0.75/0.60), unmodified.

CHELICERAE. Similar to close relatives, with proximal pair of processes and distinctively bipartite distal apophyses ( Fig. 71 View Figs 69 – 73 ); without modified hairs; without stridulatory ridges.

PALPS. As in Figs 69–70 View Figs 69 – 73 ; coxa unmodified; trochanter with slightly curved pointed retrolatero-ventral apophysis; femur with curved finger-shaped ventral apophysis; procursus with row of about 17 ventral ridges, with distinctive transversal sclerite and long prolateral process close to large flat distal element ( Figs 77–78 View Figs 74 – 81 ), with two distinct spiny processes in distal pit ( Fig. 80 View Figs 74 – 81 ); bulb with strong proximal sclerite, slightly curved appendix, and long partly sclerotized embolus with distinct distal fringes ( Figs 74–75 View Figs 74 – 81 ).

LEGS. Without spines and curved hairs; few vertical hairs; retrolateral trichobothrium on tibia 1 at 2%; prolateral trichobothrium absent on tibia 1, present on other tibiae; tarsus 1 with many pseudosegments but only ~10 distally visible in dissecting microscope.

Variation

Tibia 1 in 2 other males: 9.1, 9.3. One male with irregular black marks in AME area ( Fig. 6 View Figs 2 – 7 ).

Female

In general similar to male but eye triads on low humps, much closer together (distance PME–PME 230 µm). Tibia 1 in 6 females: 6.9–7.9 (mean 7.4). Epigynum weakly sclerotized plate with variably large and variably sclerotized posterior ‘knob’ ( Figs 72 View Figs 69 – 73 , 76 View Figs 74 – 81 , 89 View Figs 86 – 94 ), internal arch and complex transversal folds visible through cuticle; internal genitalia as in Figs 73 View Figs 69 – 73 , 90–91 View Figs 86 – 94 .

Natural history

Most specimens were found in a very limited area close to a waterfall. The domed webs had a diameter of about 15–20 cm and in each case the apex of the dome was attached to the underside of a leaf where the spider rested.

Distribution

Known from type locality in Sarawak only ( Fig. 1 View Fig. 1 ).

ZFMK

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

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Pholcidae

Genus

Panjange

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