Ibotyporanga bariro Huber 2020, sp. nov.
Creators: name: Huber, Bernhard A.
name: Villarreal, Osvaldo
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Pholcidae
Ibotyporanga
Ibotyporanga bariro

description: Ibotyporanga bariro Huber sp. nov.
urn:lsid:zoobank.org:act: 24EB3E00-C450-496F-B069-582C29062C21
Figs 176–177, 189–196, 1031, 1040
Diagnosis
Easily distinguished from known congeners by shape of procursus (Fig. 190; wide, weakly curved, without side branch, distally with transparent fringed membrane); female internal genitalia (Fig. 193) without U-shaped median structure (in contrast to I. naideae Mello-Leit ṳo, 1944 and I. emekori Huber & Brescovit, 2003; females of I. diroa Huber & Brescovit, 2003 and I. ramosae Huber & Brescovit, 2003 are unknown).
Etymology
The species name refers to the type locality; noun in apposition.
Type material
VENEZUELA – Falcón • ♂ holotype, ZFMK (Ar 21862), SE Bariro (10.7304° N, 70.6957° W), 360 m a.s.l., on arid hill, 14 Feb. 2020 (B.A. Huber, O. Villarreal M., Q. Arias C.).
Other material examined
VENEZUELA – Falcón • 1 ♂ (and two female abdomens transferred from ZFMK, Ven20-141), ZFMK (Ar 21863), and 6 ♀♀, 1 juv. in pure ethanol, ZFMK (Ven20-141), same collection data as for holotype.
Description
Male (holotype)
MEASUREMENTS. Total body length 1.7, carapace width 0.95. Distance PME–PME 50 µm; diameter PME 60 µm; distance PME–ALE 25 µm; distance AME–AME 15 µm; diameter AME 30 µm. Leg 1: 4.00 (1.10 +0.30 +1.00 +1.15 + 0.45), tibia 2: 0.90, tibia 3: 0.85, tibia 4: 1.20; tibia 1 L/d: 10.
COLOR (in ethanol). Prosoma and legs ochre-yellow, carapace with brown median band excluding ocular area; legs without dark rings; abdomen gray, with small dark marks dorsally.
BODY. Habitus as in Fig. 176. Ocular area barely raised. Carapace with distinct thoracic groove. Clypeus barely modified (slightly more protruding than in female). Sternum wider than long (0.50/0.38), without anterior humps. Abdomen globular.
CHELICERAE. As in Figs 191–192, with strong median apophysis and lateral stridulatory ridges.
PALPS. As in Figs 189–190; coxa unmodified; trochanter with rounded ventral projection; femur proximally slender, with retrolateral process and prolateral stridulatory pick (modified hair), distally widened; patella cylindrical; tibia enlarged; procursus very simple, wide, weakly curved, without side branch, distally with transparent fringed membrane; genital bulb large, with prolateral sclerotized band, simple embolar division ending in small sclerotized angular apophysis.
LEGS. Without spines and curved hairs; vertical hairs in high density prolatero-dorsally on tibiae 1–2; retrolateral trichobothrium of tibia 1 at 58%; prolateral trichobothrium absent on tibia 1; tarsus 1 with 6 pseudosegments.
Female
In general similar to male (Fig. 177), clypeus slightly less protruding, with usual low density of vertical hairs on tibiae, dark median band on carapace sometimes including ocular area and clypeus, abdomen variably with or without dark marks. Tibia 1 in six females: 0.85–1.00 (mean 0.90). Epigynum (Fig. 194) anterior plate trapezoidal, with anterior sclerotized rim; posterior plate short, simple. Internal genitalia (Figs 193, 195–196) small relative to epigynal plate, with pair of drop-shaped pore plates, without U-shaped median structure and without pair of lateral blind tubes.
Distribution
Known from type locality only, in Venezuela, Falcón (Fig. 1040).
Natural history
The species was collected on an arid hill dominated by small trees and cacti (Fig. 1031). Most specimens were collected from partly hollow rotten branches on the ground. When shaken out of their shelters, the spiders ran extremely rapidly over the ground. The species shared the locality with three other pholcid species, an unidentified Ninetinae (on the undersides of rocks), Modisimus culicinus (Simon, 1893) (under rocks) and Physocyclus globosus (Taczanowski, 1874) (among and under rocks).
description: Published as part of Huber, Bernhard A. & Villarreal, Osvaldo, 2020, On Venezuelan pholcid spiders (Araneae, Pholcidae), pp. 1-317 in European Journal of Taxonomy 718 on pages 62-65, DOI: 10.5852/ejt.2020.718.1101, http://zenodo.org/record/4069574