Pseudonemesia scutata sp. nov.

urn:lsid:zoobank.org:act: C1FD92DE-0E9C-4905-8CBF-5DED620C7539

Figs 1–3, 30

Diagnosis

The male most resembles those of P. tabiskey by the presence of one short and apically rounded spine located retrolaterally on tibia I (Fig. 2D), but can be distinguished by the male tibia I with one retrolateral spine (Fig. 2D), two in the latter (Indicatti & Villarreal 2016: fig. 1g); palpal bulb elongated with short, straight embolus (Fig. 3C–E), palpal bulb oval, with longer, curved embolus in the latter (Indicatti & Villarreal 2016: fig. 1a–e).

Etymology

The specific name is a Latin adjective in reference of the presence of a dorsal abdominal scutum in males.

Type material

Holotype ECUADOR • ♂; Napo Province, Tena, Colonso Chalupas Natural Reserve; 0°54′14″ S, 77°39′48″ W; 1358 m a.s.l.; 2–9 Mar. 2020; E. Tapia, N. Dupérré and A. Tapia leg.; pitfall; ECFN 6985; QCAZ.

Description

Male (holotype)

MEASUREMENTS. Total length: 2.69; carapace length: 1.40; carapace width: 1.19; abdomen length: 1.29.

CEPHALOTHORAX. Carapace oval, yellow with dark bands on lateral side and one dark band centrally from the eye quadrangle to the fovea; pars cephalica and pars thoracica flat, fovea straight (Fig. 2A). Labium yellow without cuspules. Maxillae yellow without cuspules (Fig. 2B); serrula not observed. Sternum yellow, longer than wide (0.65 length, 0.51 width) (Fig. 2B). Eight eyes in two rows; AME 0.05, ALE 0.1, PME 0.05, PLE 0.09, PME–PME 0.07; ocular quadrangle trapezoidal (0.25 anterior, 0.31 posterior, 0.15 high).

CHELICERAE. Light yellow; with three promarginal teeth, eight intercheliceral basal denticles; rastellum absent.

LEGS. Light yellow with dark gray-brownish apically on femora, basally on tibiae, metatarsi and tarsi I–II, tarsi not flexible; scopula absent on all tarsi; femur I incrassate, tibia I with large clasping spur and small rounded spine (Fig. 2D, arrow points to rounded spine); STC with two rows, each of 9–12 teeth on tarsi I–II; 3–5 on tarsi III–IV, ITC well developed on all legs. Leg measurements: I 3.49 (1.04/0.56/0.82/0.59/0.48); II 3.11 (0.82/0.52/0.62/0.71/0.44); III 2.98 (0.70/0.47/0.62/0.66/0.53); IV 4.57 (1.05/0.63/0.99/1.23/0.67); leg formula 4321. Leg spination (spines present on all segment except tarsi): I fe d1-1-1-1-1, pa 0, ti v1-1(clasping spine), mt v2(apical); II fe d1-1-1-1-1, pa 0, ti v1-1-3(apical), mt v1-2-2(apical), p1; III fe d2-1-3-3-1-1, p1-1, r1, pa d1, p1, ti v1-1-3(apical), p1, r1, mt v2-3(apical), p1-1, r1-1, d1-2-2; IV fe d1-1-1-1-2-1, pa d1, p1, r1, ti d2-1-1, p1-1, r1-1, v1-1-3(apical), mt d1-2, p1-1, r 1-1, v2-2-2(apical).

ABDOMEN. Oval, dorsally with apical constriction and small anterior brown scutum, light yellow with dark gray-brownish pattern; without clavate setae (Fig. 2C). Spinnerets PMS not visible, two vestigial PLS, short.

GENITALIA. Palpal tibia (0.56 length, 0.18 width); cymbium with one prolateral and two apical spines (Fig. 3A–B); bulb elongated, with short truncated embolus (Fig. 3C–E).

Female

Unknown.

Natural history

The only specimen was collected in a pitfall trap at 1358 m a.s.l. in a low montane evergreen forest of the Eastern Cordillera (BsBn01) (Santiana et al. 2013b).

Distribution

Only found at the type locality in Napo Province.