Metagonia latigo Huber, 2020

Huber, Bernhard A. & Villarreal, Osvaldo, 2020, On Venezuelan pholcid spiders (Araneae, Pholcidae), European Journal of Taxonomy 718, pp. 1-317 : 176-179

publication ID

https://doi.org/10.5852/ejt.2020.718.1101

publication LSID

lsid:zoobank.org:pub:F9E9A91E-488C-4DB1-9361-E788E9AC5BC1

DOI

https://doi.org/10.5281/zenodo.4343875

persistent identifier

https://treatment.plazi.org/id/079E5A62-0BFB-4C6F-90C6-222125D7B91A

taxon LSID

lsid:zoobank.org:act:079E5A62-0BFB-4C6F-90C6-222125D7B91A

treatment provided by

Valdenar

scientific name

Metagonia latigo Huber
status

sp. nov.

Metagonia latigo Huber sp. nov.

urn:lsid:zoobank.org:act:079E5A62-0BFB-4C6F-90C6-222125D7B91A

Figs 618–621 View Figs 614–621 , 633–635 View Figs 633–638 , 639 View Fig , 650–653 View Figs 650–656 , 1051

Metagonia Ven 02 – Eberle et al. 2018 (molecular data). — Huber et al. 2018: 71.

Diagnosis

Distinguished from similar congeners with long S-shaped or whip-shaped sclerite on procursus [ M. delicata (O. Pickard-Cambridge, 1895) ; M. talamanca Huber, 1997 ] by details of procursus ( Figs 633–635 View Figs 633–638 ; curvature of main sclerite; shape of ventral hinged process; small dorsal membranous process) and by female internal genitalia ( Figs 639 View Fig , 652–653 View Figs 650–656 ; pore plates close together; specific configuration of receptacle and ducts).

Etymology

The species name (Spanish: whip) refers to the shape of the procursus; noun in apposition.

Type material

VENEZUELA – Falcón • ♂ holotype, ZFMK (Ar 21998), Península de Paraguaná, Cerro Santa Ana (11.8177° N, 69.9468° W), 480 m a.s.l., 17 Nov. 2018 (B.A. Huber, O. Villarreal M.) GoogleMaps .

Other material examined

VENEZUELA – Falcón • 2 ♂♂, 4 ♀♀, ZFMK (Ar 21999), and 2 ♀♀ in pure ethanol, ZFMK (Ven18- 187), same collection data as for holotype GoogleMaps 3 ♂♂, 1 juv., ZFMK (Ar 22000), and 2 ♀♀ in pure ethanol, ZFMK (Ven18-193), Sierra de San Luis , E Curimagua (11.1748° N, 69.6273° W), 960 m a.s.l., 18 Nov. 2018 (B.A. Huber, O. Villarreal M.) GoogleMaps 5 ♂♂, 4 ♀♀, ZFMK (Ar 22001), and 1 ♂, 4 ♀♀ in pure ethanol, ZFMK (Ven20-146), forest near Santa Cruz de La Alegría (10.8795° N, 68.4949° W), 100 m a.s.l., 15 Feb. 2020 (B.A. Huber, O. Villarreal M., Q. Arias C.). – Yaracuy GoogleMaps 6 ♂♂, 14 ♀♀, 3 juvs, ZFMK (Ar 22002), and 2 ♀♀ in pure ethanol, ZFMK (Ven20-156), Yurubi National Park (10.4913° N, 68.6564° W), 140 m a.s.l., forest along stream, 16 Feb. 2020 (B.A. Huber, O. Villarreal M., Q. Arias C.) GoogleMaps 2 ♂♂, 5 ♀♀, ZFMK (Ar 22003), and 1 ♀ in pure ethanol, ZFMK (Ven20-159), 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.) GoogleMaps 3 ♀♀, ZFMK (Ar 22004), 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.). – Aragua GoogleMaps 2 ♂♂, 2 ♀♀, ZFMK (Ar 22005), and 4 ♀♀ in pure ethanol, ZFMK (Ven18-241), between Maracay and Puerto Colombia (10.4304° N, 67.5998° W), 380 m a.s.l., 2 Dec. 2018 (B.A. Huber, O. Villarreal M.) GoogleMaps 3 ♂♂, 1 ♀, 1 juv., ZFMK (Ar 22006), Henri Pittier National Park at 10.360° N, 67.720° W, ~ 730 m a.s.l., 11 Dec. 2002 (B.A. Huber) GoogleMaps 1 ♂, 1 ♀, ZFMK (Ar 22007), Henri Pittier National Park near Hacienda la Trilla (10.390° N, 67.747° W), ~ 130 m a.s.l., 12 Dec. 2002 (B.A. Huber). – La Guaira GoogleMaps 3 ♂♂, 2 ♀♀, ZFMK (Ar 22008), and 2 ♀♀ in pure ethanol, ZFMK (Ven20-167), El Limón , ‘site 1’ (10.4788° N, 67.3010° W), 600 m a.s.l., forest remnant along small stream, 21 Feb. 2020 (B.A. Huber, O. Villarreal M.). – Táchira GoogleMaps 3 ♂♂, 2 ♀♀, ZFMK (Ar 22009), and 3 ♀♀, 1 juv. in pure ethanol, ZFMK (Ven20-121), SE Pregonero, forest near La Trampa (7.9236° N, 71.7152° W), 1300 m a.s.l., 10 Feb. 2020 (B.A. Huber, O. Villarreal M., Q. Arias C.). – Bolívar GoogleMaps 6 ♂♂, 3 ♀♀, ZFMK (Ar 22010), and 4 ♂♂, 12 ♀♀ in pure ethanol, ZFMK (Ven02/100-2), small forest at Laguna in Canaima (6.241° N, 62.848° W), ~ 400 m a.s.l., 8 Dec. 2002 (B.A. Huber) GoogleMaps .

Description

Male (holotype)

MEASUREMENTS. Total body length 2.0, carapace width 0.60. Distance PME–PME 160 µm; diameter PME 55 µm; distance PME–ALE 15 µm; AME absent. Leg 1: 11.8 (3.1 +0.2+3.1 +4.5+0.9), tibia 2: 1.8, tibia 3: 1.0, tibia 4: 2.0; tibia 1 L/d: 52; all femora approximately same diameter.

COLOR (in ethanol). Entire prosoma whitish; legs ochre-yellow, without darker rings; abdomen whitish, with darker marks dorsally in pair of rows.

BODY. Habitus as in Fig. 618 View Figs 614–621 . Ocular area barely raised. Carapace without thoracic groove. Clypeus unmodified. Sternum slightly wider than long (0.44/0.40), unmodified. Abdomen elongate.

CHELICERAE. As in M. delicata and M. talamanca (cf. Huber 1997c: fig. 6), each side with patch of modified (globular) hairs and with distal apophysis close to fang.

PALPS. In general as in M. delicata and M. talamanca (cf. Huber 1997c: figs 4, 10); coxa unmodified, trochanter with short ventral apophysis; femur short, strongly widened, with indistinct prolateral-ventral process; retrolateral trichobothrium on tibia not in very distal position; procursus complex ( Figs 633– 635 View Figs 633–638 ), ventral hinged process attached proximally; main part of procursus retrolaterally with apparently hinged strong sclerite, prolaterally with several semitransparent elements.

LEGS. Without spines and curved hairs, few vertical hairs; retrolateral trichobothrium of tibia 1 at 6%; prolateral trichobothrium absent on tibia 1; tarsus 1 with ~15 pseudosegments, poorly visible in dissecting microscope.

Male (variation)

Tibia 1 in 35 males (including holotype): 2.9–4.0 (mean 3.4). Some males with fewer or without dark marks on abdomen ( Fig. 620 View Figs 614–621 ).

Female

In general similar to male ( Figs 619, 621 View Figs 614–621 ). Tibia 1 in 40 females: 2.6–3.6 (mean 3.0). Epigynum ( Figs 650–651 View Figs 650–656 ) unsclerotized except posterior rim, internal receptacle and ducts visible in uncleared specimens. Internal genitalia ( Figs 639 View Fig , 652–653 View Figs 650–656 ) asymmetric (antisymmetric; of 41 females, 22 were ‘left-sided’, 19 ‘right-sided’), with complex system of ducts/folds, receptacle, and large membranous pouch; pore plates oval, close together.

Distribution

Widespread in Venezuela , known from the states Falcón, Yaracuy, Aragua, La Guaira, Táchira, and Bolívar (Fig. 1051).

Natural history

All specimens were collected from the undersides of leaves in humid forests. No strong preference for monocot or dicot plants seemed to exist, but at some localities most specimens were found on a single species of plant (e.g., on palm leaves at La Trampa, Táchira). The webs were closely attached to the leaf surface and barely visible, apparently identical to those described in some detail for M. uvita Huber, 1997 (Huber & Sch̹tte 2009).

ZFMK

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

ZFMK

Zoologisches Forschungsmuseum Alexander Koenig

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Pholcidae

Genus

Metagonia

Loc

Metagonia latigo Huber

Huber, Bernhard A. & Villarreal, Osvaldo 2020
2020
Loc

Metagonia

Huber B. A. & Eberle J. & Dimitrov D. 2018: 71
2018