Panjange casaroro Huber, sp. nov.
Creators: name: Huber, Bernhard A.
name: Nuñeza, Olga M.
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Pholcidae
Panjange
Panjange casaroro

description: Panjange casaroro Huber sp. nov.
urn:lsid:zoobank.org:act:D6FF36FF-D69F-4F92-919F-82F423701E71
Figs 6–7, 24–34
Diagnosis
Easily distinguished from closest known relatives (Pa. malagos Huber sp. nov.; Pa. camiguin Huber sp. nov.) by morphology of male palps (Figs 24–27; symmetric modiFcations of trochanter and femur; asymmetric shapes of procursi), and by pair of semi-transparent lobes on epigynal scape (Figs 29, 33). From most congeners (except Pa. camiguin Huber sp. nov.) also by very long eye stalks and contiguous tips of male ocular processes (Fig. 28); from Pa. camiguin Huber sp. nov. also by proximally unmodiFed male chelicerae (densely covered with small scales in Pa. camiguin Huber sp. nov.; cf. Fig. 47) and by small process between eye stalks (Fig. 28).
Etymology
The species name is derived from the type locality; noun in apposition.
Type material
PHILIPPINES: holotype Ƌ, in ZFMK (Ar 13000), Negros Island, Negros Oriental Province, Casaroro Falls (9.281°N, 123.208°E), 550 m a.s.l., forest along river below waterfall, on leaves, 10 Mar. 2014 (B.A. Huber).
Other material examined
PHILIPPINES: 1 Ƌ, 3 ♀♀ in ZFMK (Ar 13001) and 1 Ƌ, 1 ♀ in MSU-IIT, same data as holotype; 1 ♀, 1 juv. in pure ethanol, in ZFMK (Phi 187), same data.
Description
Male (holotype)
MEASUREMENTS. Total body length 4.8, carapace width 1.0. Leg 1: 39.2 (9.2 + 0.5 + 9.4 + 18.9 + 1.2), tibia 2: 5.6, tibia 3: 3.2, tibia 4: 4.9; tibia 1 L/d: 106. Distance PME–PME 420 µm, diameter PME 105 µm, distance PME–ALE ~30 µm; AME absent.
COLOR. Carapace and clypeus pale ochre to whitish, only base of eye stalks dark; sternum whitish; legs ochre-yellow with dark brown patellae and tibia-metatarsus joints; abdomen pale gray, with black marks dorsally, monochromous ventrally.
BODY. Habitus as in Figs 6–7; ocular area raised, triads on long stalks with further distal processes whose contiguous tips seem to form a functional unit (Fig. 28); with small process between eye stalks; carapace without median furrow; clypeus unmodiFed; sternum wider than long (0.65/0.55), unmodiFed.
CHELICERAE. As in Fig. 28, with pair of simple, weakly sclerotized lateral processes, without modiFed hairs; without stridulatory ridges.
PALPS. As in Figs 24–27; proximal segments symmetric in shape but slightly larger on left side (e.g., length and diameter of right tibia about 90–95% of left tibia); coxa with strong ventro-distal rim but otherwise unmodiFed; trochanter with long weakly sclerotized retrolateral process directed toward dorsal; femur with weakly sclerotized Fnger-shaped process retrolatero-ventrally and more heavily sclerotized apophysis prolatero-dorsally; tibia with retrolateral trichobothrium in rather proximal position; tarsus with long whitish elongation, distally more strongly widened (club-shaped) in left palp; procursi of left and right palps strongly different, in each case with ventral process arising from proximal part (simple in right palp; biFd in left palp); distal part of procursus clearly hinged in left palp, not hinged in right palp; bulb much smaller in right palp, long processes extending in opposite directions (dorsal embolus; ventral appendix) almost symmetric (slightly longer in left palp).
LEGS. Without spines and curved hairs; few vertical hairs; retrolateral trichobothrium on tibia 1 at 3%; prolateral trichobothrium absent on tibia 1, present on other tibiae; tarsus 1 with> 20 pseudosegments, only distally fairly distinct.
Male (variation)
Tibia 1 in other male: 9.5 (missing in third male).
Female
In general similar to male but eye triads on low humps and much closer together (distance PME–PME 265 µm); with dark mark in place of AME. Tibia 1 in 4 females: 6.7, 7.0, 7.1, 7.4. Epigynum mostly weakly sclerotized, with apparently slightly asymmetric internal structures visible through cuticle; distinctive scape with small median process at tip and two long extensible projections curved toward dorsal (Figs 29, 33, 34); internal genitalia as in Fig. 30.
Natural history
The spiders were found on the undersides of large leaves about 50–100 cm above the ground.
Distribution
Known from type locality on Negros Island only (Fig. 16).
description: Published as part of Huber, Bernhard A. & Nuñeza, Olga M., 2015, Evolution of genital asymmetry, exaggerated eye stalks, and extreme palpal elongation in Panjange spiders (Araneae: Pholcidae), pp. 1-46 in European Journal of Taxonomy 169 on pages 14-18, DOI: 10.5852/ejt.2015.169, http://zenodo.org/record/1406222