Bulboctenus itunaitata Pereira & Labarque & Polotow 2020, sp. nov.
Creators: name: Pereira, Maria Paula
name: Labarque, Facundo
name: Polotow, Daniele
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Ctenidae
Bulboctenus
Bulboctenus itunaitata

description: Bulboctenus itunaitata sp. nov.
Figures 11–12, 16, 19
Type material. Male holotype from Vitória do Xingú [-2.88552, -52.01256], Pará, Brazil, non-flooded “terra firme” forests, 24.XI.2000, R. Santos & J. Dias coll., deposited in MPEG(ARA)526. Male paratype and two female paratypes from Castelo dos Sonhos (8.28361, -54.99861), Altamira, Pará, Brazil, 10.XI.2005, D.F. Candiani & D.R. Santos-Souza coll., deposited in MPEG(ARA)2419.
Etymology. The species name is a contraction of “Ituna” and “Itatá” and honors an indigenous land from the state of Pará. The Ituna/Itata land is home to isolated indigenous peoples who have not established contact with foreigners until nowadays and gets its name because it is surrounded by the Ituna and Itatá rivers of the state of Pará.
Diagnosis. Males of Bulboctenus itunaitata sp. nov. resemble those of B. munduruku sp. nov. by the apical projections of the MA well differentiated and the RTA enlarged (Figs 12 A–C, 14A–C, 16A–C, 17A–C), but can be distinguished by the apical projection of the MA slightly curved anteriorly and pointing prolaterally (Fig. 12B), while B. munduruku sp. nov. presents the apical projection of the MA elongated, strongly curved anteriorly (Fig. 14B). Females of Bulboctenus itunaitata sp. nov. resemble those of B. munduruku sp. nov. by having the copulatory ducts separated (Figs 12 D–E, 14D–E, 16D–E, 17D–E) but can be distinguished by the posterior lateral projections (PLP) of the MS distally rounded (Figs 12D, 16D), the copulatory ducts relatively close to each other (Fig. 12E), and the lateral projections (LP) of the lateral sectors enlarged, and straight, while B. munduruku sp. nov. presents the LP as wide as long, the copulatory ducts well separated and the PLP narrow and pointed (Figs 14 D–E, 17D–E).
Description. Male (MPEG(ARA)000526). Total length 7.22 (Fig. 11A). Carapace 3.83 long and 2.96 wide. Clypeus 0.22 high. Eye diameters: AME 0.24, ALE 0.14, PME 0.29, PLE 0.27. Leg measurements: I: femur 3.14 / patella 1.40 / tibia 3.12 / metatarsus 2.62 / tarsus 1.21 / total 11.49; II: 3.12 / 1.33 / 2.80 / 2.54 / 1,12 / 10.91; III: 2.87 / 1.22 / 2.45 / 2.70 / 1.02 / 10.26; IV: 3.61 / 1.28 / 3.28 / 4.31 / 1.44 / 13.92. Leg formula 4123. Leg spination: tibiae I–II v2-2-2-2-2, r0, p0, III–IV v1-1-1-1-2, r1-1, p1-1; metatarsus I v2-2-2, r1, p1, II v2-2-2, r1-1, p1-1, III v11-1-1-2, r1-1-1, p1-1-1, IV v1-1-1-1-2, r1-1-1, p1-1-1. Palp (Figs 12 A–C, 16A–C): wide embolus, with rectangular base and rounded apex; median apophysis heavily excavated prolaterally and with a short apex, curved anteriorly and slightly pointed; conductor with narrow base and large apex, not covering the tip of the embolus.
Female (MPEG(ARA)002423). Total length 8.15 (Fig. 11B). Carapace 3.74 long and 2.89 wide. Clypeus 0.22 high. Eye diameters: AME 0.20, ALE 0.14, PME 0.29, PLE 0.26. Leg measurements: I: femur 2.87 / patella 1.50 / tibia 2.90 / metatarsus 2.27 / tarsus 1.09 / total 10.63; II: 2.59 / 1.30 / 2.46 / 2.10 / 1.03 / 10.51; III: 2.50 / 2.26 / 1.96 / 2.28 / 0.96 / 9.96; IV: 3.30 / 1.30 / 2.81 / 3.80 / 1.40 / 12.61. Leg formula 4123. Leg spination: tibia I v2-22-2-2, r0, p0, II v2-2-2-2-2, r0, p1, III–IV v1-1-1-1 -2, r1-1, p1-1; metatarsus I, v2-2-2, r0, p0, II v2-2-2, r0, p1, III v1-1-1-1-2, r1-1, p1-1, IV v1-1-1- 1-1-2, r1-1, p1-1. Epigyne (Figs 12 D–E, 16D–E): hexagonal median sector with rounded posterior lateral projections; lateral projections straight, not covered by the elongated lateral sector; straight copulatory ducts; small fertilization ducts.
Variation. Two males: total length 6.51–7.22, carapace length 3.72–3.83, femur I 3.13–3.14. Five females: total length 7.90–8.72, carapace length 3.40–4.0, femur I 2.48–3.1.
Additional material examined. BRAZIL. Pará. Novo Progresso (-7.13527, -55.41416), 2 females, label missing date information, M.A. Ribeiro Junior coll. (MPEG (ARA)002423); Altamira (-8.32638, -55.14222), 1 female, 15.XI.2005, A. L. Tourinho coll. (MPEG (ARA)002421); same locality and data, 1 female, D. R. SantosSouza coll. (MPEG(ARA)002422); Altamira (-8.28361, -54.99861), 1 female, 10.XI.2005, D. R. Santos-Souza coll. (MPEG (ARA)002424); same locality, 1 female, 12.X.2005, D. F. Candiani coll. (MPEG (ARA)002420).
Distribution. Novo Progresso, Altamira and Vitória do Xingú, Pará, Brazil. (Fig. 19).
description: Published as part of Pereira, Maria Paula, Labarque, Facundo & Polotow, Daniele, 2020, Description of a new Neotropical spider genus in the family Ctenidae Keyserling 1877 (Araneae: Lycosoidea) from the Brazilian Amazon rainforest, pp. 375-396 in Zootaxa 4890 (3) on pages 383-387, DOI: 10.11646/zootaxa.4890.3.5, http://zenodo.org/record/4306273