Nativus tawu Casas & Rheims 2023, sp. nov.
Creators: name: Casas, Cristian M.
name: Rheims, Cristina A.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Sparassidae
Nativus
Nativus tawu

description: Nativus tawu sp. nov.
Figs 97−111
Type Material: Holotype: COLOMBIA: Vaupés: 1♂, Mitú, Casa de Don Luis (1.3965, -70.0377), 188 m, 21 September 2019, N. Hazzi & L. Martínez leg. (AvH-I-3207). Paratypes: COLOMBIA: Vaupés: 1♀, same data as holotype (AvH-I-3246).
Etymology. The specific name refers to the táw¸ masks used during the ónye, a ceremony of mourning performed by the Cubeo indigenous tribe inhabiting the Vaupés River basin, especially along its tributaries Caduyarí and Querarí; noun in apposition.
Diagnosis. Males of N. tawu sp. nov. resemble those of N. carare sp. nov. (Figs 16−18) and N. mariua sp. nov. (Figs 59−61) by the palps with E straight and tegulum lacking RdP (Fig. 90). They are distinguished from N. carare sp. nov. by the dRTA bifid, with two pointed branches and tegulum with triangular protrusion (tp) close to bp (Figs 107−108) (dRTA single and tegulum lacking small tp close to bp in N. carare sp. nov.) and from N. mariua sp. nov. by the bp irregularly-shaped, slightly longer than wide and dRTA with ventral branch curved in retrolateral view (Figs 107−108) (bp keel-like, wider than long and dRTA with ventral branch straight in retrolateral view in N. mariua sp. nov.). Females resemble those of N. mariua sp. nov. (Figs 62−64) by the LL fused medially with pair of anterior COd bearing posterior CO and large, posterior MS. The new species can be distinguished by the MS rectangular, wider than long, with pair of antero-lateral moon-shaped pockets, and fused part of LL shorter than anterior COd (Fig. 109) (MS trapezoid, as long as wide and fused part of LL as long as anterior COd in the latter species).
Description. Male (holotype): Prosoma orange with brown margins and thoracic striae; cephalic region with longitudinal stripes extending posteriorly from behind PME and PLE; fovea dark brown; eye borders black. Chelicerae orange brown. Legs and palps orange brown, slightly lighter than prosoma. Endites pale brown, distally lighter. Labium orange brown, distally paler brown. Sternum pale yellow, with dark orange margins. Opisthosoma pale yellowish cream colored; dorsally with two rounded, brown muscle impressions; ventrally with U-shaped lines of muscle impressions. Spinnerets pale yellow (Figs 97−98). Total length 6.85. Prosoma: 3.27 long, 3.38 wide. Opisthosoma: 3.26 long, 2.09 wide. Eyes diameters: 0.22, 0.24, 0.23, 0.33; interdistances: 0.46, 0.47, 0.71, 0.65, 0.71, 0.70. Legs (2143): I: 21.89 (3.82, 1.26, 4.42, 4.23, 1.81); II: 26.44 (4.89, 1.30, 5.54, 4.96, 2.14); III: 16.79 (3.72, 1.39, 3.37, 3.40, 1.32); IV: 21.18 (4.33, 1.06, 4.06, 4.34, 1.90). Spination follows the generic pattern, except femur IV: r0-1-1; tibiae I−II: p1-0-1, d1-1-1, r1-0-1, v2-2-0; tibia III: d1-0-1. Palp: PTA distally rounded, as wide as long; VTA reduced; vRTA two times longer than wide in retrolateral view; dRTA bifid with dorsal branch wide, concave at ventral margin, and ventral branch long and hook-like; tegulum with small triangular tegular protrusion, close to bp; DTA with no projections (Figs 99−101, 106−108).
Female (paratype): Prosoma orange brown, slightly more reddish between thoracic striae, with brown margins; cephalic region with brown stripes extending posteriorly from behind PLE. PME and between AME; thoracic striae and fovea brown; eye borders black. Chelicerae pale yellowish brown, distally lighter. Labium brown, distally yellowish brown. Sternum yellowish cream colored with dark orange margins. Opisthosoma grayish brown; dorsally with few scattered white marks laterally on anterior half and two paisr of rounded brown muscle impressions; ventrally with scattered white marks laterally and V-shaped lines of muscle impressions. Spinnerets yellowish orange, distally lighter (Figs 102−103). Total length: 9.07. Prosoma: 3.42 long, 3.27 wide. Opisthosoma: 4.99 long, 3.32 wide. Eyes: diameters: 0.22, 0.24, 0.22, 0.32; interdistances: 0.47, 0.52, 0.71, 0.70, 0.63, 0.68. Legs (2143): Legs (2143): I: 15.00 (4.30, 1.58, 4.13, 3.45, 1.54); II: 10.71 (4.31, 1.65, 5.54, 3.39, 1.28; III: 11.78 (3.50, 1.41, 2.89, 2.88, 1.10); IV: 12.75 (3.68, 1.13, 3.23, 3.40, 1.31). Spination follows the generic pattern, except tibia III: d0-0-1. Epigyne: EF wider than long; MS with transverse striations (Figs 104, 109). Vulva: CD broad, with first winding posteriad and strongly curving anteriad; encapsulated part of internal ducts three times longer than wide, anteriorly bent mediad and posteriorly dilated; FD antero-laterad (Figs 105, 110−111).
Distribution. Only known from the type locality, in Vaupés, eastern Colombia (Fig. 142).
description: Published as part of Casas, Cristian M. & Rheims, Cristina A., 2023, Nativus gen. nov., a new huntsman spider genus from South America (Araneae: Sparassidae: Heteropodinae), pp. 1-43 in Zootaxa 5360 (1) on pages 29-31, DOI: 10.11646/zootaxa.5360.1.1, http://zenodo.org/record/10146274