Corinna caatinga Rodrigues & Bonaldo, 2014, n. sp.
Creators: name: Rodrigues, Bruno V. B.
name: Bonaldo, Alexandre B.
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Corinnidae
Corinna
Corinna caatinga

description: Corinna caatinga n. sp.
Figs. 36, 40, 63–73
Type material. Male holotype from ECB Rochas Ornamentais Ltda, Fazenda Bonito, 05º14'07.1"S 41º41'16.3"W, Castelo do Piauí, Piauí, Brazil, deposited in MPEG (20257). Partypes: Brazil. Piauí: Caracol (Parque Nacional da Serra das Confusões), 09º13'16"S 43º29'21''W, 5 male (MPEG 20259); 1 female (MPEG 20260); 1 female, X.2006, P.R.R Silva et al. (CHNUFPI 0164); Castelo do Piauí (Fazenda Bonito, ECB Rochas Ornamentais Ltda,), 05°12'42"S 41º42'13''W, 3 males (MPEG 20258); 4 male, 06.VI.2012, F.M. Oliveira-Neto (CHNUFPI 0158); Rio Grande do Norte: João Câmara, 05º32'15"S 35º49'11''W, 1 male and 1 female, VI.2012, N. Sebastian et al. (MPEG 19970); Natal [5°47'40.12"S 35°12'39.43"W], 3 males, 1951, M. Alvarenga, (MZUSP 12626); Paraíba: [7°14'23.86"S 36°46'55.02"W], 1 male, R. Ihering (MNRJ 42241); Bahia: Feira de Santana [12°15'19.67"S 38°57'15.43"W] (Chácara Promenade), 1 male, 19.I.2003, T. Aguzzoli and A. Carvalho (MCN 35064).
Etymology. The specific name, a noun in apposition, refers to a typical xerophytic phytophysionomy from Northeastern Brazil, the “ caatinga ”.
Diagnosis. Males of Corinna caatinga n. sp. are readily distinguished by the extremely developed chelicerae and enlarged cephalic region (Fig. 40); in the male palp, the tapered basal cymbial projection, the enlarged conductor and extremely long and delicate embolus are also unique (Figs. 63–64, 68–69); females present the same carapace and chelicerae modifications and can be further identified by the epigynal plate projected posteriorly with a median, conspicuous copulatory opening (Figs. 65–66).
Description. Male (holotype). Carapace black, with posterior end of thoracic region dark red, chelicerae black, endites red with posterior end paler, labium black with posterior end paler, sternum dark red, leg I and II dark brown, leg III and IV dark yellow; dorsum of abdomen gray, dorsal scutum with distal portion large tapering to the median region, venter of abdomen gray. Total length: 13.3. Carapace 6.9 long; 6.2 wide; 4.2 high. Clypeus 0.5 high. Abdomen 6.3 long; 4.2 wide. Eyes: anterior row 2.45, posterior row 3.0. MOQ: 0.9 long, 1.0 anterior wide, 1.05 posterior wide. Eye diameters and interdistances: AME 0.3; ALE 0.31; PME 0.24; PLE 0.22; AME–AME 0.44; AME–ALE 0.46; PME–PME 0.6; PME–PLE 0.84; ALE–PLE 0.2. Chelicerae 5.4 long; 6 retromarginal teeth and 3 promarginal teeth. Sternum 3.5 long; 3.1 wide. Leg measurements: femur I 6.88/ patella 2.5/ tibia 6.15/ metatarsus 5.7/ tarsus 2.88/ total 24.11; II 6.0/ 2.55/ 5.2/ 5.12/ 2.4/ 21.27; III 5.05/ 2.5/ 3.6/ 4.72/ 1.84/ 17.71; IV 6.6/ 2.56/ 6.0/ 7.12/ 2.6/ 24.88. Leg formula 4123. Leg supination: I—femur d1-1-0, p0-0-1; tibia v2-2 -2-2-2; metatarsus v2-1 p-1r. II—femur d1-1-0, p0-0-1; tibia v2-2 -2-2-2; metatarsus v2-1 p-1r. III—femur d1-1-1, p0-1-2, r0-1-1; tibia v2-1 r-1p, r0-1-1, p0-1-1; metatarsus p0-1-0, r1-1-0, v2-2 -1. IV—femur d1-1-1, r0-1-1, p0-0-1; tibia r0-1-1, v2 -0-2; metatarsus p0-1-0, r1-1-0, v2-2 -1. Palp: femur with two posterior dorsal spines; RTA strongly excavated prolateraly; T without projection; TPC retrolateral, far from base of embolus; E long and filiform partially covered by distal fold of conductor; C enlarged with wide unexclerotized base (Figs. 63–64, 67–71).
Female (paratype, MPEG 20260). Coloration as in male, except carapace dark red with posterior end of thoracic region red; sternum, endites and labium brown; abdomen without scutum dorsal. Total length: 12.6. Carapace 7.0 long; 6.1 wide; 4.3 high. Clypeus 0.65 high. Abdomen 5.0 long; 4.1 wide. Eyes: anterior row 2.7, posterior row 3.3. MOQ: 0.8 long, 1.0 anterior wide, 1.2 posterior wide. Eye diameters and interdistances: AME 0.3; ALE 0.34; PME 0.27; PLE 0.19; AME–AME 0.44; AME–ALE 0.42; PME–PME 0.68; PME–PLE 0.89; ALE–PLE 0.25. Chelicerae 4.85 long. Sternum 3.55 long; 3.3 wide. Leg measurements: femur I 6.95/ patella 2.95/ tibia 5.7/ metatarsus 5.7/ tarsus 2.55/ total 23.85; II 6.3/ 2.7/ 5.12/ 5.3/ 2.3/ 21.72; III 5.05/ 2.4/ 3.6/ 4.95/2.0/ 18; IV 6.88/ 2.56/ 6.32/ 7.12/ 2.4/ 25.28. Leg formula 4123. Leg spination: I—femur d1-1-0, p0-0-1; tibia v2-1 p-1r-1p-2; metatarsus v2-1 p-1r. II—femur d1-1-0, p0-0-1; tibia v2-2 -2-2; metatarsus v2-1 p-1r. III—femur d1-1-1, p0-1-1, r0- 1-1; tibia v2-1 r-1p, r0-1-1, p0-1-1; metatarsus p0-1-0, r1-1-0, v2-1 p-1r-1. IV—femur d1-1-1, r0-0-1, p0-0-1; tibia r0-1-1, v2 -0-2; metatarsus p0-1-0, r1-1-0, v2-1 p-1r-1.
Epigynum: epigynal plate projected posteriorlly; CO with posterior border recurved; CD visible ventrally, sinuous; SS irregular, collapsed in our preparations; PVP enveloping partially the PS but not enveloping SS (Figs. 65–66).
Variation. Length (10 males): total 11.4–14.5; carapace 5.6–6.9; femur I 5.5–6.88; (4 females) total 12.6–16.5; carapace 6.7–7.4, femur I 6.5–6.95. The specimens from Piauí are larger and darker than the ones from other locations.
Distribution. Piauí, Rio Grande do Norte, Paraíba and Bahia, Brazil.
Other material examined. Brazil. No specific locality, 4 males, R. Ihering MNRJ (41992). Piauí: Castelo do Piauí (ECB Rochas Ornamentais Ltda, Fazenda Bonito), [05º12'42"S 41º42'13''W], 1 male, F.M. Oliveira-Neto (CHNUFPI 0156); 1 male (CHNUFPI 0157); Caracol (Parque Nacional da Serra das Confusões), 09º13'16"S 43º29'21''W, 1 male, X.2006, P.R.R Silva et al. (CHNUFPI 0165); 1 male (CHNUFPI 0166). Rio Grande do Norte: João Câmara, 05º32'15"S 35º49'11''W, 1 female, XI.2011, N. Sebastian et al. (MPEG 19965); 1 male, VII.2012, N. Sebastian et al. (MPEG 19966); 1 male, VI.2012, N. Sebastian et al. (MPEG 19967); 1 male, VI.2012, N. Sebastian et al. (MPEG 19968); 1 male, VI.2012, N. Sebastian et al. (MPEG 19969). Paraíba: [7°14'23.86"S 36°46'55.02"W], 1 male, R. Ihering (MNRJ 42241).
description: Published as part of Rodrigues, Bruno V. B. & Bonaldo, Alexandre B., 2014, Taxonomic revision of the species group rubripes of Corinna Koch, 1842 (Araneae; Corinnidae), pp. 451-493 in Zootaxa 3815 (4) on pages 475-478, DOI: 10.11646/zootaxa.3815.4.1, http://zenodo.org/record/252676