Aetana banahaw Huber 2015, sp. nov.
Creators: name: Huber, Bernhard A.
name: Nuñeza, Olga M.
name: Ung, Charles Leh Moi
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Pholcidae
Aetana
Aetana banahaw

description: Aetana banahaw Huber, sp. nov.
urn:lsid:zoobank.org:act: 6D270C60-BBF0-4DFE-88BC-1F90D87C5D8F
Figs 231–233, 240–242
Diagnosis
Distinguished from closest known relatives (A. manansalai Huber, sp. nov., A. lozadae Huber, sp. nov.) by shape of procursus (large retrolatero-distal sclerite; compare Figs 229–231) and by pentagonal epigynum (Figs 232, 240); from A. manansalai Huber, sp. nov. also by larger retrolatero-ventral process on procursus (Fig. 231) and narrower apophysis of male palpal trochanter; from A. lozadae Huber, sp. nov. also by smaller projections at ALE (similar to A. manansalai Huber, sp. nov.; cf. Fig. 221). Distinguished from other congeners by presence of projections at ALE, by longer than wide epigynum, and by posterior membranous pockets close together (Fig. 232).
Etymology
Named for the type locality; noun in apposition.
Material examined
Holotype
PHILIPPINES: ♂, Luzon Isl., Laguna Prov., Mt. Banahaw, forest near Taytay Falls (14.110° N, 121.507° E), 560 m a.s.l., near ground, 26 Feb. 2014 (B.A. Huber), ZFMK (Ar 13999).
Other material
PHILIPPINES, Luzon Isl., Laguna Prov.: 7 ♂♂, 4 ♀♀, same data as holotype, ZFMK (Ar 14000-01); 1 ♀, 4 juvs, in pure ethanol, same data, ZFMK (Phi 217). – 1 ♀, 1 juv., in pure ethanol, Mt. Banahaw (14.103° N, 121.518° E), 4.38 km W of Lucban, 790 m a.s.l., 16 May 2011 (H. Wood et al.), CAS (9045550).
Description
Male (holotype)
MEASUREMENTS. Total body length 3.7, carapace width 1.35. Leg 1: 36.7 (8.6 + 0.5 + 8.6 + 15.4 + 3.6), tibia 2: 5.5, tibia 3: 3.8, tibia 4: 5.6; tibia 1 L/d: 63. Distance PME-PME 395 µm, diameter PME 140 µm, distance PME-ALE ~ 70 µm; AME absent.
COLOR. Carapace ochre-yellow with narrow dark lateral marginal bands and wide dark brown median band including posterior part of ocular area; clypeus ochre yellow, small marks below each eye triad; sternum monochromous light brown, labium darker; legs greenish ochre with very indistinct darker rings on femora (subdistally, with light tip), and tibiae (proximally and subdistally, the latter followed by light tip); abdomen ochre-gray, dorsally and laterally covered with many black marks, ventrally with dark mark behind gonopore and larger, less distinct mark in front of spinnerets.
BODY. Habitus very similar to A. lozadae Huber, sp. nov. (cf. Figs 184–185); ocular area raised, each triad on additional short hump directed toward lateral, with small process below ALE (only slightly longer than in A. manansalai Huber, sp. nov.; cf. Fig. 221); carapace with very shallow median furrow in
anterior part only; clypeus with distinctive lateral plates bordered by sclerotized ridges; sternum wider than long (0.9/0.7), unmodified.
CHELICERAE. As in close relatives (cf. Figs 221, 226), with pair of lateral processes proximally and pair of very long lateral apophyses; without modified hairs; without stridulatory ridges.
PALPS. In general as in A. manansalai Huber, sp. nov. and A. lozadae Huber, sp. nov. (cf. Figs 219–220, 224–225); coxa unmodified; trochanter with ventral apophysis slightly narrower than in A. manansalai Huber, sp. nov.; femur with ventro-distal apophysis and retrolateral ridge ending in small hump; patella triangular in lateral view; tibia with retrolateral trichobothrium in very distal position; proximal part of procursus, with simple retrolatero-ventral process, with complex and apparently partly hinged distal elements; bulb with only one process (weakly sclerotized embolus), distally with one small knob.
LEGS. Without spines; with curved hairs on metatarsi 1–3; few vertical hairs; retrolateral trichobothrium on tibia 1 at 3%; prolateral trichobothrium absent on tibia 1, present on other tibiae; tarsus 1 with ~25 pseudosegments, distally fairly distinct.
Male (variation)
Tibia 1 in 7 other males: 8.2–9.4 (mean: 8.9).
Female
In general similar to male but clypeus unmodified and with pair of dark brown bands below ALE; eye triads much closer together (distance PME-PME 185 µm), without processes at ALE; with indistinct stridulatory apparatus between carapace and abdomen: modified area medially on carapace versus barely distinguishable hairless area on abdomen. Tibia 1 in 4 females: 6.6, 6.8, 7.1, 7.3; dark and light rings on legs mostly more distinct than in males. Epigynum as in Figs 232 and 240, anterior large plate pentagonal, with transversal anterior bulge bordered posteriorly by shallow indentation; area behind epigynum with pair of very indistinct membranous pockets in weakly modified cuticle (weak transversal ridges). Internal genitalia as in Figs 233 and 242, without sclerotized pockets.
Natural history
The spiders were found in domed sheet webs close to the ground, usually in well protected dark spaces under large rocks. Males and females were sometimes found together in one web. When disturbed, the spiders ran to the rock, vibrated only for a moment and then remained motionless, pressed against the rock surface.
Distribution
Known from the type locality only (Fig. 5).
description: Published as part of Huber, Bernhard A., Nuñeza, Olga M. & Ung, Charles Leh Moi, 2015, Revision, phylogeny, and microhabitat shifts in the Southeast Asian spider genus Aetana (Araneae, Pholcidae), pp. 1-78 in European Journal of Taxonomy 162 on pages 66-69, DOI: 10.5852/ejt.2015.162, http://zenodo.org/record/3829511