Pastaza vegai, Dupérré & Tapia, 2025

Dupérré, Nadine & Tapia, Elicio, 2025, Revision of the Ecuadorian Microstigmatidae (Araneae: Mygalomorphae), with the description of six new species, European Journal of Taxonomy 1007, pp. 87-132 : 119-123

publication ID	https://doi.org/10.5852/ejt.2025.1007.2999
publication LSID	lsid:zoobank.org:pub:3D9557C2-29EA-46CD-8E4C-40D22DDE4CAF
persistent identifier	https://treatment.plazi.org/id/038487E4-FFE8-FFBD-FDE7-FEC3FD557E6F
treatment provided by	Plazi
scientific name	Pastaza vegai
status	gen. et sp. nov.

Treatment

Pastaza vegai gen. et sp. nov.

urn:lsid:zoobank.org:act:7E691C69-DB19-4578-BD13-8FA500918863

Figs 21–23 View Fig View Fig View Fig , 29F View Fig , 30 View Fig

Diagnosis

Males most resemble those of P. roberti gen. et sp. nov. but are distinguished by their palpal bulb with one keel, and slightly widened embolus tip ( Fig. 23D View Fig ) whereas in the latter, the palpal bulb has two keels and the embolus tip is strongly widened ( Fig. 17D View Fig ).

Etymology

The specific epithet is a patronym in honor of Mauricio Vega, one of the collectors of the type specimen.

Type material

Holotype

ECUADOR • ♂; Tungurahua Province, Puntzán near Baños ; 1°25′28″ S, 78°24′25″ W; 2042 m a.s.l.; 21 Mar. 2011; A. Chagas, A. Giupponi, A. Kury and M. Vega leg.; ECFN 11675; QCAZ. GoogleMaps

Description

Male (holotype)

MEASUREMENTS. Total length: 7.78; carapace length: 3.50; carapace width: 2.08; abdomen length: 2.92.

CEPHALOTHORAX. Carapace elongated-oval, orange-brown, slightly darker along radiating lines and margin; pars cephalica flat, pars thoracica sloping; fovea straight ( Fig. 22A View Fig ). Labium light orange, margin V-shaped; with four cuspules ( Fig. 22B View Fig ). Maxillae light orange, with small anterior lobe; with nine cuspules ( Fig. 22B View Fig ); serrula present. Sternum longer than wide (1.48 length, 1.36 width); with three pairs of oval, marginal sigilla ( Fig. 22B View Fig ). Eight eyes in two rows; AME 0.14, ALE 0.18, PME 0.06, PLE 0.17, PME–PME 0.30; ocular quadrangle rectangular (0.64 anterior, 0.65 posterior, 0.37 high).

CHELICERAE. Orange-brown, rastellum absent; 10 promarginal teeth, 9 intermarginal denticles; intercheliceral tumescence inconspicuous.

LEGS. Uniformly orange-brown ( Fig. 21A View Fig ); tarsi I–II sparse, completely divided scopula, metatarsi I–II 25% apical; tarsi III sparse 50%, divided, metatarsi III–IV absent, tarsi IV absent; filiform trichobothria on all tarsi; tarsi with STC with 5–6 teeth per row, ITC present on all legs; tarsal organ smooth, highly elevated ( Fig. 29F View Fig ). Leg measurements: I 11.04 (3.06/1.61/2.69/2.02/1.66); II 9.39 (2.75/1.29/2.04/2.20/1.11); III 8.81 (2.55/1.49/1.54/2.17/1.06); IV 13.31 (3.43/1.67/2.79/3.60/1.82); leg formula 4123. Leg spination (spines on all segment except tarsi): I fe d1-1-1-1, p1-1, r1, pat d1, v2(apical), ti p1-1, r1-1 v2-2-2(apical) plus megaspine, mt p1, r1-1, v2-1-2(apical); II fe d1-1-1-1, p1-1, r-1-1, pat d1, v2(apical), ti p1-1, v2-2-3(apical), mt d1, v2-1-2; III fe d1-1-1, p1-1, r1-1-1, pat d1, v1, p1- 1, r1, ti d1-1, p1-1, r1-1, v2-2-3(apical), mt d1-1-1, p1-1, r1-1, v2-2-3(apical); IV fe d1-1-1-1, p1-1, r1-1, pat d1, v1, r1, p1, ti d1-1-1, p1-1, r1-1, v2-2-3(apical), mt d1-1-1-2, p1-1, r1-1-1, v1-1-1-1-3(apical).

ABDOMEN. Oval, dark grayish-brown with yellowish markings, with thick setae anteriorly on sclerotized socket ( Fig. 21A View Fig ); spinnerets short (PMS 0.23\PLS 0.36).

GENITALIA. Palpal tibia (1.32 length, 0.07 width); cymbium without spines ( Fig. 23A–B View Fig ); bulb with pointed tegular heel ( Fig. 23C View Fig ), constricted with numerous small striae ( Fig. 23E View Fig ); base with one major keel ( Fig. 23D View Fig ), embolus twisted, tip slightly widened ( Fig. 23C–E View Fig ).

Female

Unknown.

Natural history

The only male was collected at 2042 m a.s.l. in a montane evergreen forest of the North Eastern Andean range (BsMn01) ( Santiana et al. 2013a).

Distribution

Known only from Tungurahua Province.