Epicratinus omegarugal, Gonçalves & Brescovit, 2020

Gonçalves, Ricardo Antonio & Brescovit, Antonio Domingos, 2020, Taxonomic review and cladistic analysis of Neotropical spider genus Epicratinus Jocqué & Baert, 2005 (Araneae: Zodariidae) with description of eleven new species, Zootaxa 4886 (1), pp. 1-77 : 23-24

Epicratinus omegarugal sp. nov.

Figs 30–31 .

Type. Male holotype from Reserva Estadual de Acau „, 17º8’0,7”S, 42º46’5,1”W, Leme do Prado, Minas Gerais, Brazil, 18-28/II/2013, P.H. Martins, deposited in UFMG 13738. Paratypes : 1♀, same data of holotype , deposited in UFMG 13738; 1♀, Boa Nova, 14º23’05.4”S, 40º09’58.4”W, Bahia, Brazil, X/2003 – III/2004, E.M. Neto, deposited in IBSP 66295 .

Diagnosis. Males of E. omegarugal sp. nov. are easily recognized because they RTA bifid retrolaterally directed with the upper portion short lanceolate, the lower portion has a wide base and flat orbicular end, the cymbium with well conspicuous basal side projection in hook shape, fitting the distal circumference of the lower portion of the RTA. Females present semicircular atrium with anterior and lateral border in the shape of an omega letter ( Figs 30 , 31 ).

Etymology. The specific epithet is a noun taken in apposition and is in reference to Omega Rugal, a fictional character in The King of Fighters series game from SNK, which is the boss on the first game and a recurrent character on this series, the epigynum looks like an Omega letter, from Greek alphabet.

Description. Male (UFMG 13738). Color: brown carapace, burnt orange sternum with brown edges, dark brown chelicerae at base and dark orange at distal part, pale yellow coxae, burnt yellow legs; predominantly dark brown; dorsal abdomen with twelve pale yellow spots (2-2-2-1-1-2-2), two of these spots in the middle of a dark brown medium dorsal shield with many light brown spots, short bristles throughout the abdomen; ventral abdomen pale yellow with four brown bands, slightly sclerotinized, orange above the epigastric furrow. Total length 4.3; carapace length 2.5; width 1.8; abdomen length 1.8; maximum length of spinnerets 0.1; chelicerae length 0.7; clypeus height 0.62. Eyes: diameters AME 0.07, ALE 0.1, PME 0.1, PLE 0.1. Interdistances AME-AME 0.04, AME-ALE 0.12, PME-PME 0.09, PME-PLE 0.32, ALE-PLE 0.06. Spinulation: I: Fe d1-1-0, p0-0-1, r0, v0; Pa d0, p0, r0, v0; Ti d0, p0, r0, v1-1-2; Me d0, p0, r0, v2-1-3. II: Fe d1-1-1, p0-0-1, r0-1-0, v0; Pa d0, p0, r0, v0; Ti d0, p0-0-1, r0, v1- 1-2; Me d0, p0-1-1, r0, v2-1-3. III: Fe d1-2-1, p1-0-1, r0-1-1, v0; Pa d0-0-1, p0-1-0, r0-1-0, v0; Ti d1-1-0, p1-0-1, r1-0-1, v2-2-2; Me d0-1-0, p0-1-2, r1-1-2, v2-2-2. IV: Fe d1-2-1, p0-0-1, r0-0-1, v0; Pa d0-0-1, p0-1-0, r0-1-0, v0; Ti d1-1-0, p1-0-1, r1-0-1, v2-2-2; Me d0-1-0, p2-1-2, r1-1-2, v2-3-2. Formula: 4123.

Measurements of legs:

Palp. Femur with two dorsal spines (0-0-2); patella with apophysis apical distal dorsal; tibia with two rows of median bristles in the middle portion of the retrolateral margin, one on an apophysis, one conspicuous prolateral dorsal bristle, one small retrolateral ventral elevation without bristles; RTA bifid retrolaterally directed, the upper portion of the RTA short and lanceolate, the lower portion has broad base and flat orbicular end; cymbium with well conspicuous basal lateral projection, hook-shaped, fitting into the distal circumference of the inferior portion of the RTA, a median spine prolateral and a distal; Subtegulum with curved ridge; tegulum with median haematodocha in the central area; large membranous conductor; tegular apophysis small lanceolate; spermatic duct visible; short embolus, with a sharp leaf-shaped projection at its base and very conspicuous.

Female (UFMG 13738). Color: carapace dark brown uniform, sternum dark orange, dark brown chelicerae, pale yellow coxae, dark orange legs; dorsal abdomen predominantly dark brown with ten spots (2-2-2-2-1-1) and numerous small white spots, short bristles throughout the abdomen; ventral abdomen pale yellow with four brown, slightly sclerotinized, pale yellow and orange stripes above the epigastric furrow. Total length 5.6; carapace length 2.8; width 1.8; abdomen length 2.6; maximum length of spinnerets 0.25; chelicerae length 1; clypeus height 0.78. Eyes: diameters AME 0.08, ALE 0.11, PME 0.1, PLE 0.11. Interdistances AME-AME 0.06, AME-ALE 0.14, PME-PME 0.09, PME-PLE 0.4, ALE-PLE 0.06. Spinulation: I: Fe d1-1-0, p0-0-1, r0, v0; Pa d0, p0, r0, v0; Ti d0, p0, r0, v1-1-1; Me d0, p0, r0-0-1, v2-1-2. II: Fe d1-1-0, p0-0-1, r0, v0; Pa d0, p0, r0, v0; Ti d0, p0, r0, v1-1-1; Me d0, p0-1- 1, r0, v2-1-3. III: Fe d1-1-1, p1-0-1, r0-0-1, v0; Pa d0-0-1, p0-1-0, r0-1-0, v0; Ti d1-1-0, p1-0-1, r1-0-1, v2-1-2; Me d0-1-0, p1-1-2, r1-1-2, v2-3-2. IV: Fe d1-2-1, p0-0-1, r0-0-1, v0; Pa d0-0-1, p0-1-0, r0-1-0, v0; Ti d1-2-0, p1-0-1, r1-0-1, v2-1-2; Me d0-1-0, p1-1-2, r1-1-2, v2-3-2. Formula: 4123.

Measurements of legs:

Epigynum. Epigynal plate hexagonal, wider than long, circular atrium with oval spermathecae. Internally presents a chamber visible in each spermathecae, these rounded on one side and truncated on the other, border of the atrium semicircular. ( Figs 31 D–F).

Variation. Females (n = 2): total length 5.6‾5.7, carapace 2.8‾2.9, femur I 1.58‾1.6.

Distribution. Brazil (northeast of Minas Gerais and center/southeast of Bahia) ( Fig. 40 ).

Figures

FIGURE 30. A. Epicratinus omegarugal sp. nov. (UFMG 13738) Habitus male, dorsal view. B. Male, ventral view. C. (IBSP 66295) Female, dorsal view. D. Female, ventral view. (Scale = 1 mm).

FIGURE 31. A. Epicratinus omegarugal sp. nov. (UFMG 13738) Male palp, dorsal view. B. (UFMG 13738) and C. Ventral view. D. (IBSP 66295) Epigynum, ventral view. E. (IBSP 66295) Vulva. F. Vulva. (Scale in A, B = 0.5; C, D, E, F = 0.2 mm).

FIGURE 40. Area of occurrence of Epicratinus omegarugal sp. nov., E. perfidus, E. pikachu sp. nov. and E. vader sp. nov. (clade B).