Guadana muirapinima Rheims 2021, sp. n.
Creators: name: Rheims, Cristina A.
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Sparassidae
Guadana
Guadana muirapinima

description: Guadana muirapinima sp. n.
Figs 43−56, 60, 70
Type material: Holotype: ♂, from BRAZIL: Pará: Juruti, Beneficiamento, ponto 1 (-2.5076, -56.1776), 7 January 2012, E.G.S. Cafofo Silva leg. (MPEG 30837). Paratypes: BRAZIL: Pará: 1♀, Juruti, Platô Capiranga, linha 168E (-2.4728, -56.2082), 9 February 2007, N.F. Lo Man Hung leg. (MPEG 30688); 1♀, Juruti (-2.4643, -56.0024) (MPEG 30677).
Etymology. The specific name refers to the original inhabitants of the margins of the old Juruti Lake, currently the oldest part of the city of Juruti. It is also the name of a tree of good solid timber, that is common to the region; noun in apposition.
Diagnosis. Males of G. muirapinima sp. n. are distinguished from all other congeners by the palp with embolus bearing a bifid basal projection, with one branch long, distally widened and tapering towards tip and one shorter, distally semi-rounded branch (Figs 44, 70). Females resemble those of S. mapia sp. n. and S. urucu by the epigyne with MS bearing single epigynal pocket (Figs 29, 46, 79). They are distinguished from the latter species by the pocket much wider than long (as long as wide, or longer than wide in the latter species) (Figs 46, 55).
Description. Male (holotype): Prosoma brownish orange with two irregular pale brown marks at the base of cephalic region and reticulated marks along lateral margins and between thoracic striae; fovea and thoracic striae pale brown; eye borders black. Chelicerae, legs and palps yellowish orange with gray marks at the base of striae and setae. Labium brown, distally pale brown. Endites pale yellowish orange, distally pale yellow. Sternum pale yellow with pale brown margins. Opisthosoma yellowish gray; dorsally with pale yellow marks laterally and pair of rounded, brown muscle impressions; ventrally with two lines of curved muscle impressions. Spinnerets yellowish cream colored (Figs 48−49). Total length 6.5. Prosoma: 3.2 long, 3.0 wide. Opisthosoma: 3.2 long, 2.3 wide. Eyes: diameters: 0.24, 0.23, 0.15, 0.26; interdistances: 0.10, 0.03, 0.33, 0.30, 0.26, 0.23. Legs (2143): I: 23.2 (6.0, 1.7, 6.9, 6.3, 2.3); II: 26.1 (6.8, 1.7, 7.7, 7.4, 2.5); III: 16.1 (4.6, 1.2, 4.4, 4.4, 1.5); IV: 18.7 (5.1, 1.1, 4.9, 5.6, 2.0). Palp: vRTA reduced to a small bump on tibia; dRTA concave, distally widened with medially depressed tip; DTA roughly straight, abruptly narrowed at tip; small tegular projection present close to embolus base; conductor hyaline, same width throughout its entire length; embolus filiform, strongly curved prolaterally (Figs 43−45, 52−54; 60, 70).
Female (MPEG 30677): Coloration pattern as in male, slightly lighter (Figs 50−51). Total length 6.7. Prosoma: 3.1 long, 3.1 wide. Opisthosoma: 3.5 long, 2.9 wide. Eyes: diameters: 0.17, 0.21, 0.13, 0.24; interdistances: 0.20, 0.06, 0.31, 0.32, 0.30, 0.30. Legs (2143): I: 16.9 (4.8, 1.7, 5.0, 4.0, 1.4); II: 18.5 (5.3, 1.8, 5.5, 4.4, 1.5); III: 12.9 (4.0, 1.2, 3.4, 3.1, 1.2); IV: 14.5 (4.2, 1.1, 3.7, 4.0, 1.5). Epigyne: epigynal field as wide as long; MS as wide as long, widest anteriorly; epigynal pocket seven times wider than long (Figs 46, 55). Vulva: internal ducts running anteriad from CO, then posteriad towards SP; SP U-shaped; FD short, anteriad (Figs 47, 56).
Variation. Females (n = 2): total length 6.7−7.6; prosoma length 3.1−3.5; femur I length 4.8−5.0.
Distribution. Only known from the type locality in Brazil (Fig. 81).
description: Published as part of Rheims, Cristina A., 2021, The Neotropical genera Guadana Rheims, 2010 and Sparianthina Banks, 1929 (Araneae: Sparassidae: Heteropodinae), pp. 401-431 in Zootaxa 5061 (3) on pages 411-419, DOI: 10.11646/zootaxa.5061.3.1, http://zenodo.org/record/5649711