Corinna demersa, Rodrigues, Bruno V. B. & Bonaldo, Alexandre B., 2014

Rodrigues, Bruno V. B. & Bonaldo, Alexandre B., 2014, Taxonomic revision of the species group rubripes of Corinna Koch, 1842 (Araneae; Corinnidae), Zootaxa 3815 (4), pp. 451-493 : 484-485

Corinna demersa n. sp.

Figs. 17 , 28–30 , 39 , 90–93, 98–104

Type material. Male holotype from Ilha do Cardoso [25°7'54.00"S 47°57'59.00"W], Cananéia, São Paulo, Brazil, II.2008, G.C.O. Piccoli & G.Q. Romero, deposited in MPEG (20254). Paratypes: Brazil. Bahia: Maracás [13°25'41.94"S 40°26'16.03"W] (Fazenda do Mato), 1 female, 16.II.1967, U. Caramachi et al. ( MNRJ 06435); Espírito Santo: Guarapari (Restinga de Setiba), 20°36'0"S 40°25'0"W, 1 male and 2 females, 28–04.IX–X.2009, T.

Gonçalves Souza ( UFMG 7188); Rio de Janeiro: Cabo Frio [22°52'43.26"S 42° 1'11.55"W] (Figueira), 1 male, 2.I.2003, ( MNRJ 06436); São Paulo: São Paulo (Ilhabela, Ilha do Búzios) [23°48'21.84"S 45° 8'41.18"W], 1 male and 1 female, X.1963, exped. DZ ( MZUSP 12620); Cananéia ( Ilha do Cardoso) [25°7'54.00"S 47°57'59.00"W], 1 females, II.2008, G.C.O. Piccoli & G.Q. Romero ( MPEG 20255); 4 females ( MPEG 20256); Rio Grande do Sul: Torres [29°20'20.81"S 49°43'37.32"W], 1 female, 09.X.1972, G. Carvalho (MCN 748).

Etymology. The specific name is a Latin adjective meaning submerged and refers to the microhabitat in which the holotype was collected, immersed in the water reservoir of a bromeliad.

Diagnosis. Males of Corinna demersa n. sp. resemble those of C. maracas n. sp. by the RTA with a ventroapical incision, absence of tegular process and presence of a well-delimited unsclerotized area in the distal retrolateral margin of conductor, but differ by the RTA’s ventro-apical incision deeper and by the thin, long embolus, partially covered by distal fold of conductor (Figs. 90–91, 99, 101–102); females resemble those of C. maracas n. sp. by the triangular copulatory opening, arising between the closely placed secondary spermathecae, but differ by the long, inverted T-shaped copulatory ducts visible ventrally and by the epigynal surface not grooved (Figs. 92–93, 103).

Description. Male (holotype). Carapace and chelicerae black, endites and labium black with posterior end paler, sternum dark red, leg with coxae, trochanter and femur dark brown, patella, tibia, metatarsus and tarsus dark yellow; dorsum of abdomen dark gray with scutum dorsal in distal third, ventrally brown, with large median gray band in longitudinal axis. Total length 11.1. Carapace 5.4 long; 5.1 wide; 2.2 high. Clypeus 0.4 high. Abdomen 5.6 long; 3.6 wide. Eyes: anterior row 2.0, posterior row 2.4. MOQ: 0.77 long, 0.92 anterior wide, 0.9 posterior wide. Eye diameters and interdistances: AME 0.3; ALE 0.22; PME 0.26; PLE 0.24; AME–AME 0.24; AME–ALE 0.38; PME–PME 0.34; PME–PLE 0.56; ALE–PLE 0.18. Chelicerae 3.0 long; 5 retromarginal teeth and 3 promarginal teeth. Sternum 2.9 long; 2.5 wide. Leg measurements: femur I 5.1/ patella 2.4/ tibia 5.1/ metatarsus 4.1/ tarsus 1.8/ total 18.5; II 4.6/ 2.3/ 4.1/ 3.9/ 1.5/ 16.4; III 4.0/ 1.9/ 3.4/ 3.7/ 1.5/ 14.5; IV 5.2/ 2.0/ 4.9/ 5.5/ 1.8/ 19.4. Leg formula 4123. Leg spination: I—femur d1-1-0, p0-0-1; tibia v2-1 p-2-2; metatarsus v2-2 -0. II—femur d1-1-0, p0-0-1; tibia v2-1 p-2-2-0; metatarsus v2-2 -0. III—femur d1-1-1, p0-1-2, r0-1-0; tibia v2-2 -0, r0-1-1, p0-1-0; metatarsus p0-1-0, r1-1-0, v2-2 -1. IV—femur d1-1-1, r0-0-1, p0-0-1; tibia r0-1-1, v2-2 -0; metatarsus p0-1-0, r1-1-0, v2-2 -1. Palp: femur with two posterior dorsal spines; T without projection; TPC absent; E thin and long, partially covered by conductor (Figs. 90–91, 99, 101–102).

Female (paratype MPEG 20255). Coloration as in male. Total length 16.0. Carapace 6.3 long; 5.8 wide; 3.3 high. Clypeus 0.4 high. Abdomen 9.3 long; 5.9 wide. Eyes: anterior row 2.45, posterior row 2.8. MOQ: 0.88 long, 0.92 anterior wide, 0.94 posterior wide. Eye diameters and interdistances: AME 0.32; ALE 0.24; PME 0.26; PLE 0.26; AME–AME 0.3; AME–ALE 0.44; PME–PME 0.42; PME–PLE 0.7; ALE–PLE 0.18. Chelicerae 3.9 long. Sternum 3.4 long; 2.9 wide. Leg measurements: femur I 5.3/ patella 2.5/ tibia 5.2/ metatarsus 4.4/ tarsus 1.9/ total 19.3; II 4.8/ 2.3/ 4.2/ 4.0/ 1.6/ 16.9; III 4.3/ 2.1/ 4.0/ 3.7/ 1.6/ 15.7; IV 5.4/ 2.1/ 4.9/ 5.7/ 1.9/ 20.0. Leg formula 4123. Leg spination: I—femur d1-1-0, p0-0-1; tibia v2-1 p-2-1p-2; metatarsus v2-2 -0. II—femur d1-1-0, p0-0-1; tibia v1 p-2-2-2; metatarsus v2-2 -0. III—femur d1-1-1, r0-1-0, p0-1-1; tibia v2-2 -0, r0-1-1, p0-1-0; metatarsus p1- 1-0, r1-1-0, v2-2 -1. IV—femur d1-1-1, r0-0-1, p0-0-1; tibia r0-1-1, v2-2 -0; metatarsus p1-1-0, r0-1-0, v2-2 -1. Epigynum: epigynal plate not projected posteriolly; CO anterior, leveled with apices of SS; CO conspicuous; SS big, close to each other; PVP poor developed, linked at basal third of SS and enveloping partially the PS (Figs. 92–93, 103).

Variation. Length (7 males): total 11.1–14.1; carapace 5.3–6.4; femur I 4.6–5,6; (10 females) total 13.0–16.1; carapace 5.3–6.6; femur I 4.5–5.5.

Distribution. Bahia, Espírito Santo, Rio de Janeiro, São Paulo and Rio Grande do Sul, Brazil.

Other material examined. Brazil. Bahia: Nova Viçosa, [17°52'19.76"S 39°23'8.12"W], 1 male and 1 female, 23.III.1993, C.B. Castro & P.S. Young ( MNRJ). Espírito Santo: Santa Tereza (Estrada Santa Tereza - Fundão), [19°56'13.23"S 40°28'44.03"W], 1 female, N.D. Santos and L.F. Reis ( MNRJ); Presidente Kennedy (Praia das Neves), 21°14'10,3"S 40°58'33"W, 1 female, 5–8.X.2009, T. Gonçalves Souza ( UFMG 8182). Rio de Janeiro: Vila da Penha, [22°50'39.08"S 43°18'45.23"W], 2 males and 1 female, N.O. dos Santos ( MNRJ); Distrito Federal [actual Rio de Janeiro city 22°54'12.74"S 43°12'34.51"W], 2 females, 22.VI. 1939, A. Passarelli and A. Carvalho ( MNRJ); Maricá, 1 male and 1 female, ( MNRJ); Rio de Janeiro, (Recreio dos Bandeirantes), [23°1'36.74"S 43°28'9.81"W], 2 female ( MNRJ 06446); Itauna, 1 female, 1.I.2003 ( MNRJ 06437). São Paulo: Cananéia ( Ilha do Cardoso), [25°7'54.00"S 47°57'59.00"W], 1 male, IV.2010, G.C. Piccoli ( MPEG 20252); 1 male, G.Q. Romero ( MPEG 20253).

Figures

FIGURES 17 – 24. Corinna demersa n. sp., male: (17) thricobothria on RTA, retrolateral. Corinna aechmea n. sp., male, tarsus I: (18) thricobothria; (19) thricobothria base; (20) tarsal organ; (21) thricobothria and tarsal organ; (22) thricobotrhial cluster; (23) scopula. Corinna ziriguidum n. sp., male, metatarsus IV: (24) cluster of ventral distal stout setae.

FIGURES 25 – 32. Corinna maracas n. sp., female: (25) palpal claw. Corinna ziriguidum n. sp., male, tarsus I: (26) claws, dorsal; (27) claws, lateral. Corinna demersa n. sp., female: (28) tarsus I, claw, lateral; (29) abdomen, lateral; (30) abdominal setae, lateral. Corinna aechmea n. sp., male, abdomen (31) lateral setae; (32) feathery setae.

FIGURES 37 – 40. Lateral view of carapace of some Corinna species, males, carapace and chelicerae, lateral view: (37) Corinna balacobaco n. sp.; (38) Corinna vesperata n. sp.; (39) Corinna demersa n. sp.; (40) Corinna caatinga n. sp.