Tupirinna mutum Xavier & Bonaldo 2021, sp. nov.

Tupirinna mutum sp. nov.

Figs 4A, B, 11A–D

urn:lsid:zoobank.org:act: F8F4E0D5-C506-4E1E-AAEE-09B398103A79

Type material. Holotype: ♂ from Acampamento Mutum (01°36’44.7”S, 56°11’39.2”W), Juruti, Pará, Brazil 13.II.2007, leg. N.F. Lo-Man-Hung & J.A.P. Barreiros (MPEG 19945). Paratypes: BRAZIL: Pará: Juruti, Acampamento Mutum (02°33’18.0”S, 56°13’22.4”W), 20.VIII.2011, leg. E.G.S. Cafofo, 1♀ (MPEG 19950); Same locality (02°36’44.7”S, 56°11’39.2”W), 22.XI.2007, leg. D.F. Candiani & N.F. Lo-Man-Hung, 1♂ (MPEG 19947), 1♂ (MPEG 19948); Sítio Barroso (02°27’41.7”S, 56°00’11.6”W), 11.II.2007, leg. J.A.P. Barreiros, 1♂ (MPEG 19946); Várzea Piranha (02°12’39.2”S, 56°07’12.7”W), 24.VIII.2011, leg. E.G.S. Cafofo, 1♂ (MPEG 19949); Mato Grosso: Cuiabá, Unidade de Conservação Parque Mãe Bonifácia (15°34’40.92”S, 56°06’17.49”W), 1–30.VIII.2007, leg. S.E. Marçal, 1♂ (MPEG 35500).

Etymology. The specific name is a noun in apposition after the type locality.

Diagnosis. Males of Tupirinna mutum sp. nov. resemble those of T. platnicki sp. nov. by the presence of a subapical embolar reinforcement ring (Fig. 11A), but can be recognized by the presence of a large, blunt sub-apical tegular process superposed to the embolar base (Fig. 11A, B). Females resemble those of T. araguaia sp. nov. by the continuous border of the copulatory opening, but can be recognized by the smaller size of the copulatory opening and by the convex epigynal plate the posterior margin (Figs 11C, D).

Description. Male holotype (MPEG 19945). Carapace orange, with brown stripe extending over ocular area, and dark brown lateral stripes. Chelicerae dark brown. Labium brown. Endites brown. Sternum and borders yellow, with anterior lateral excavations brown. Legs yellow, with lateral surfaces of patellae black; proximal and distal regions of lateral surfaces of tibiae black. Abdomen dorsum grey, with pair of black longitudinal spots in cardiac area; in median region a pair of black transversal spots, followed by three black transverse spots; after that, one black transverse spot and black spot close to spinnerets, venter yellow (Fig. 4A). Total length 4.92. Carapace length 2.36, width 1.92, height 1.25. Clypeus height 0.15. Eye diameters and interdistances: anterior row 0.67, posterior row 0.73, MOQ: length 0.37, anterior width 0.37, posterior width 0.37, AME 0.15, PME 0.10, ALE 0.15, PLE 0.13, AME-AME 0.08, AME-ALE 0.04, PME-PME 0.15, PME-PLE 0.10, ALE-PLE 0.02. Chelicerae: length 1.10, with 5 promarginal and 3 retromarginal teeth. Sternum length 1.06, width 1.13. Leg I: femur (fe) 2.11, patella (pa) 0.82, tibia (ti) 2.15, metatarsus (mt) 1.71, tarsus (ta) 0.94. II: fe 1.99, pa 0.81, ti 1.90, mt 1.28, ta 0.97. III: fe 2.10, pa 0.75, ti 1.54, mt 1.07, ta 0.89. IV: fe 2.25, pa 0.75, ti 1.90, mt 2.23, ta 1.03. Abdomen: length 2.40, width 1.64. Leg spination: I – femur d1-1-1, p0-0-1; tibia v2-2-2; metatarsus v2-2-0. II – femur d1-1-1, p0-0-1; tibia v2-2-2; metatarsus v2-2-0. III – femur d1-1-1, p1-1-1, r0-1-1; tibia p1-1-0, r1-1-0, v2-2-0; metatarsus p1-1-0, r1-1-0, v2-2-0. IV – femur d1-1-1, p0-1-1, r0-1-1; tibia p1-1-0, r1-1-0, v2-2-2; metatarsus p1-1-1, r1-1-1, v2-2-2. Palp: tibia longer than half cymbial length; ventral lobe of retrolateral tibial apophysis with apical spur; dorsal lobe absent; ventral tibial apophysis slightly curved apically; embolus short, embolar basal process absent, prolateral tegular process large and slightly pointed (Figs 11A–B).

Female paratype (MPEG 19950). Carapace orange, with brown stripe extending over ocular area, and dark brown lateral stripes. Chelicerae brown. Labium brown. Endites brown. Sternum and borders yellow, with anterior lateral excavations brown. Legs yellow, with lateral surfaces of patellae black; proximal and distal regions of lateral surfaces of tibiae black. Abdomen dorsum grey, with two pairs of black spots in cardiac area; in median region, two pairs of black spots on each side; followed by a huge black transversal spot with three triangular peaks in upper portion, after that a semicircular black spot close to spinnerets; venter grey (Fig. 4B). Total length 5.31. Carapace length 2.06, width 1.68, height 1.22. Clypeus height 0.14. Eye diameters and interdistances: anterior row 0.56, posterior row 0.62, MOQ: length 0.36, anterior width 0.33, posterior width 0.35, AME 0.12, PME 0.11, ALE 0.13, PLE 0.11, AME-AME 0.11, AME-ALE 0.04, PME-PME 0.12, PME-PLE 0.10, ALE-PLE 0.05. Chelicerae: length 1.08, with 5 promarginal and 3 retromarginal teeth. Sternum length 1.08, width 1.07. II: fe 1.78, pa 0.67, ti 1.43, mt 2.33, ta 0.95. III: fe 1.91, pa 0.59, ti 1.53, mt 1.67, ta 0.82. IV: fe 2.35, pa 0.78, ti 1.97, mt 2.38, ta 0.80. Abdomen: length 2.97, width 1.98. Leg spination: No leg I. II – femur d1-1-1, p0-0-1; tibia v2-2-2; metatarsus v2-2-0. III – femur d1-1-1, p0-1-1, r0-1-1; tibia p1-1-0, r1-1-0, v2-2-0; metatarsus p1-1-0, r1-1-0, v2-2-2. IV – femur d1-1-1, p1-1-1, r1-1-1; tibia p1-1-0, r1-1-0, v2-2-0; metatarsus p1-1-0, r1-1-0, v2-2-2. Epigynum: copulatory opening anteriorly positioned; posterior vulval plate well developed; secondary spermathecae absent (Fig. 11C, D).

Variation. Length: (3♂) total 4.31–5.12, carapace 2.03–2.51, femur I 1.85–2.15.

Material examined. Only the type material.

Distribution. States of Pará and Mato Grosso, Brazil (Fig. 28).