Canaima guaquira 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
Canaima
Canaima guaquira

description: Canaima guaquira Huber sp. nov.
urn:lsid:zoobank.org:act: ABAD982F-9BF4-4CE6-BF7D-934296A0224E
Figs 54–55, 85–88, 96–98, 1034
Diagnosis
Distinguished from known congeners by armature of male chelicerae (Fig. 87; three pairs of processes, with highly distinctive distal pair of slender curved processes), by shape of procursus (Fig. 86; distinctive dorso-distal sclerite), by dorsal process on genital bulb (arrow in Fig. 86), and by internal female genitalia (Figs 88, 98): anterior bilobed sclerite (arrows in Fig. 88); median arc between pore plates; pore plates far apart; note that female of C. merida Huber, 2000 is unknown.
Etymology
The species name refers to the type locality; noun in apposition.
Type material
VENEZUELA – Yaracuy • ♂ holotype, ZFMK (Ar 21834), Guaquira, ‘site 1’ (10.2951° N, 68.6535° W), 120 m a.s.l., forest along stream, 16 Feb. 2020 (B.A. Huber, O. Villarreal M., Q. Arias C.).
Other material examined
VENEZUELA – Yaracuy • 3 ♂♂, 6 ♀♀, ZFMK (Ar 21835), and 8 ♀♀ in pure ethanol, ZFMK (Ven20- 158), same collection data as for holotype • 1 ♂, 6 ♀♀, ZFMK (Ar 21836), Guaquira, ‘site 2’ (10.2807° N, 68.6530° W), 150 m a.s.l., forest along stream, 17 Feb. 2020 (B.A. Huber, O. Villarreal M., Q. Arias C.).
Description
Male (holotype)
MEASUREMENTS. Total body length 1.1, carapace width 0.55. Distance PME–PME 35 µm; diameter PME 60 µm; distance PME–ALE 30 µm; AME absent. Leg 1: 8.45 (2.0 +0.2 +2.2+3.15 + 0.9), tibia 2: 1.1, tibia 3: 0.85, tibia 4: 1.1; tibia 1 L/d: 49.
COLOR (in ethanol). Prosoma and legs ochre-yellow, sternum whitish, legs without dark rings; abdomen pale greenish gray, dorsally with darker bluish marks.
BODY. Habitus as in Fig. 54. Ocular area slightly raised. Carapace with distinct thoracic groove. Clypeus slightly more protruding than in female and with sclerotized rim. Sternum wider than long (0.40/0.30), with pair of small but distinct anterior processes. Abdomen oval.
CHELICERAE. As in Fig. 87, with very short entapophyses and three pairs of frontal processes; highly distinctive distal pair of slender curved processes.
PALPS. As in Figs 85–86; coxa with distinct retrolateral-ventral apophysis, trochanter with low ventral process, femur proximally with retrolateral process, distally with small ventral process (similar to C. arima; cf. Huber 2000: fig. 1322); procursus with distinctive dorso-distal sclerite and membranous elements; genital bulb with semitransparent dorsal process (arrow in Fig. 86), embolar process whitish, weakly sclerotized.
LEGS. Without spines and curved hairs; with higher than usual density of vertical hairs on tibiae; retrolateral trichobothrium of tibia 1 at 25%; prolateral trichobothrium absent on tibia 1; tarsus 1 with ~13 pseudosegments.
Male (variation)
Tibia 1 in five males (incl. holotype): 1.9–2.4 (mean 2.14).
Female
In general similar to male (Fig. 55) but without humps on sternum, clypeus less protruding and rim not sclerotized, few vertical hairs on leg tibiae. Tibia 1 in 13 females: 1.50–1.75 (mean 1.65). Epigynum (Fig. 96) slightly protruding, anterior plate medially whitish, laterally brown, sclerotized; large light brown posterior plate. Internal genitalia (Figs 88, 97–98) with anterior bilobed sclerite (arrows in Fig. 88), median arc between pore plates, pore plates far apart, and large anterior transparent receptacle.
Distribution
Known from type locality only, in Venezuela, Yaracuy (Fig. 1034).
Natural history
Most specimens were collected in dead bamboo sheaths on the ground but the species seemed to be common in the general forest leaf litter.
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 31-33, DOI: 10.5852/ejt.2020.718.1101, http://zenodo.org/record/4069574