Cuiambuca vacabrava Rheims, 2023, sp. nov.
Creators: name: Rheims, Cristina A.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Sparassidae
Cuiambuca
Cuiambuca vacabrava

description: Cuiambuca vacabrava sp. nov.
urn:lsid:zoobank.org:act: 1B435816-7A2C-4641-9C18-6C853670574C
Figs 1, 2 A−C, 8−10
Diagnosis
Males of C. vacabrava sp. nov. are distinguished from those of C. aratangi sp. nov. (Fig. 5 A−E) by the palps with RTA with dorsal branch truncated without projections (Fig. 10 B−C) (dorsal branch bearing two long and pointed projections in C. aratangi sp. nov.) and E base wide and laminar base, lacking secondary TBE (Fig. 10 D−E) (E base slender and secondary TBE present in C. aratangi sp. nov.). Females resemble C. aratangi sp. nov. (Fig. 5 F−H) by the epigyne with anteriorly rounded MS but are distinguished from the latter species by the LL bearing triangular posterior projections (Fig. 10F) and by the vulva with BP medially twisted (Fig. 10 G−H) (LL lacking posterior projections and BP medially bent at a 90° angle in C. aratangi sp. nov.).
Etymology
The specific name refers to the Sítio Vaca Brava, in which the Mata do Pau Ferro is located; noun in apposition.
Material examined
Holotype BRAZIL • ♂; Sergipe State, Areia, Reserva da Mata do Pau Ferro; [06°57ʹS, 35°43ʹ58″ W]; 23−29 Sep. 1999; Equipe Biota leg.; IBSP 60013.
Paratypes BRAZIL • 1 ♀; Sergipe State, Areia, Reserva da Mata do Pau Ferro; [06°57ʹ S, 35°43ʹ58″ W]; 23−29 Sep. 1999; Equipe Biota; Equipe Biota leg.; IBSP 60015 • 1 ♀; Itabaiana, Estação Ecológica da Serra de Itabaiana; (10°40ʹ S, 37°25ʹ W); 14−20 Sep. 1999; A.D. Brescovit et al. leg.; IBSP 43277.
Description
Male (holotype)
COLOR. Prosoma brown, slightly darker along lateral margins of cephalic region, along fovea and thoracic striae; eye borders black. Chelicerae brown. Legs and palps pale brown. Labium brown, distally pale brown. Endites pale brown, distally cream colored. Sternum cream colored with pale brown margins. Opisthosoma cream colored; dorsally with brown pattern of irregular marks medially on anterior half and elongated marks laterall and on posterior half; ventrally with two almost parallel lines of muscle impressions. Spinnerets cream colored (Fig. 8 A−B).
MEASUREMENTS. Total length 6.0, prosoma length 3.0, width 2.5, opisthosoma length 2.9, width 1.8. Eye diameters: 0.24, 0.19, 0.15, 0.18, interdistances: 0.14, 0.05, 0.26, 0.25, 0.10, 0.05. Legs (4123): I: 10.7 (3.1, 1.4, 2.8, 2.6, 0.8), II: 10.6 (3.1, 1.5, 2.7, 2.5, 0.8), III: 8.0 (2.5, 0.8, 2.0, 2.1, 0.6), IV: 10.8 (3.1, 1.1, 2.5, 3.1, 1.0).
PALP. RTA with ventral branch bifid, bearing two laminar, triangular projections; tegulum with hyaline keel arising close to C base; tp arising close to MA, roughly triangular and much smaller than MA (Figs 8 C−E, 10A−E).
Female (IBSP 43277, paratype)
COLOR. As in male, generally darker, with opisthosoma with dorsal median chevron-like marks down posterior half and ventral median faint brown V-shaped mark (Fig. 9 A−B).
MEASUREMENTS. Total length 7.6, prosoma length 3.4, width 2.8, opisthosoma length 3.9, width 2.6. Eye diameters: 0.24, 0.20, 0.12, 0.17, interdistances: 0.23, 0.16, 0.35, 0.35, 0.15, 0.07. Legs (4123): I: 9.1 (2.8, 1.6, 2.2, 1.8, 0.7), II: 8.5 (2.6, 1.4, 2.0, 1.9, 0.6), III: 7.7 (2.5, 1.3, 1.5, 1.8, 0.6), IV: 9.8 (2.9, 1.1, 2.3, 2.6, 0.9).
EPIGYNE. EF wider than long, with wide, irregular-shaped MAB antero-laterally; MS widest anteriorly, reaching ⅓ EF length (Figs 9C, 10F).
VULVA. BP longer than SP with anterior margin not surpassing half SP length; FD laterad, apically mediad (Figs 9D, 10 G−H).
Variation
Two females: total length 7.6−8.6, prosoma length 3.4−3.5, femur I length 2.7−2.8.
Distribution
Known from the states of Paraíba and Sergipe in northeastern Brazil (Fig. 11)
description: Published as part of Rheims, Cristina A., 2023, Cuiambuca gen. nov., a new genus of Sparianthinae spiders (Araneae: Sparassidae) from Brazil, pp. 152-169 in European Journal of Taxonomy 856 on pages 163-167, DOI: 10.5852/ejt.2023.856.2035, http://zenodo.org/record/7625571