Pastaza vegai gen. et sp. nov.

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

Figs 21–23, 29F, 30

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) whereas in the latter, the palpal bulb has two keels and the embolus tip is strongly widened (Fig. 17D).

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.

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). Labium light orange, margin V-shaped; with four cuspules (Fig. 22B). Maxillae light orange, with small anterior lobe; with nine cuspules (Fig. 22B); serrula present. Sternum longer than wide (1.48 length, 1.36 width); with three pairs of oval, marginal sigilla (Fig. 22B). 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); 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). 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); spinnerets short (PMS 0.23\PLS 0.36).

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

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.