Exocora ribeiroi , Lemos, Yuji & Brescovit, Antonio D., 2013

Lemos, Yuji & Brescovit, Antonio D., 2013, New species of the spider genus Exocora Millidge, 1991 (Araneae: Linyphiidae) from Brazil, Zootaxa 3599 (3), pp. 261-278: 268

publication ID

http://dx.doi.org/10.11646/zootaxa.3599.3.4

publication LSID

lsid:zoobank.org:pub:8570920B-EAC4-48A6-A831-6463682B36D1

persistent identifier

http://treatment.plazi.org/id/03C72F26-1067-414D-FF4C-FF11FD28A70F

treatment provided by

Plazi

scientific name

Exocora ribeiroi
status

new species

Exocora ribeiroi  new species

Figs 6View FIGURE 6 A–D; 7 A–F; 15 C; 16 C; 17

Types: Holotype 1 ɗ, from Estação Biológica Costão da Serra (28 º 66 ' 19 ''S, 49 º 62 ' 37 ''W), Siderópolis, Santa Catarina, Brazil, 1 /VII/ 2006, R. A. Teixeira et al. col. ( IBSPAbout IBSP 84839). Paratype: 1 Ψ, from Rio Molha (28 º 31 'S; 49 º 19 'W), Urussanga, Santa Catarina, Brazil, 23 /X/ 2006 – 25 /I/ 2007, R. Teixeira col. ( IBSPAbout IBSP 129743); 2 ɗ 4 Ψ, from Centro de Pesquisas e Conservação da Natureza Pró-Mata (29 ° 26 'S; 50 ° 35 'W), São Francisco de Paula, Rio Grande do Sul, Brazil, 18 /V/ 2002, R. Ott col. ( MCN 39413View Materials), 1 ɗ 1 Ψ, 2 /I/ 2001, R. Ott col. ( MCN 39414View Materials).

Etymology: The species name is in memory of Jair Aparecido Ribeiro, a great friend, who fought cancer until his last day. The name is a noun in genitive.

Diagnosis: Specimens of Exocora ribeiroi  n. sp. resemble those of E. girotii  n. sp., differing in the shape of the anterior part of lamella characteristica, which is straight and curved dorsally ( Figs 6View FIGURE 6 A, B). Females of E. ribeiroi  n. sp. can be diagnosed by the opening of the atrium, wider in E. girotii  n. sp., and by the distance between the copulatory ducts, which are more separated than in the other species in the genus ( Figs 6View FIGURE 6 C, D; 15 C; 16 C).

Description: Male (Holotype IBSPAbout IBSP 84839): Total length 1.92. Carapace 0.88 long, 0.72 wide; orange with dark lateral markings. Sternum 0.46 long, 0.5 wide, orange with darkened margins. Clypeus 0.16 high. Chelicerae promargin with 3 teeth, retromargin with 3 teeth. Abdomen pale brown with strong dark markings along the entire surface ( Figs 7View FIGURE 7 A, B). Eyes diameter and interdistances: AME 0.06, ALE 0.1, PME 0.08, PLE 0.1, AME-AME 0.02, PME-PME 0.02, AME-ALE 0.03, PME-PLE 0.03. Eyes projected. Bristles present in ocular area ( Fig. 7View FIGURE 7 B). Coxa IV separation 1.14 times their width. Femur I/II/III/IV 0.94 / 0.86 / 0.6 / 0.8; patella I 0.3; tibia I 0.92; metatarsus I 0.92; tarsus I 0.54. Legs orange with darkened markings on each articles. Tibia I prolateral macroseta thick and curved ( Fig. 7View FIGURE 7 C). TmI 0.22. Palpal tibia without apophysis. Protegulum present. Radix small. Embolus long, filiform, with origin at the posterior part of the embolic division, runs to the ectal side curving several times. Embolic membrane small ( Figs 6View FIGURE 6 A, B).

Female (Paratype IBSPAbout IBSP 129743): Total length 1.8. Carapace 0.82 long, 0.66 wide. Sternum 0.46 long, 0.46 wide. Clypeus 0.1 high. Chelicerae promargin with 3 teeth, retromargin with 5 teeth. Body color pattern same as male ( Figs 7View FIGURE 7 D, E). Eyes diameter and interdistances: AME 0.06, ALE 0.09, PME 0.09, PLE 0.08, AME-AME 0.02, PME-PME 0.02, AME-ALE 0.03, PME-PLE 0.03. Eyes as observed in males, but with less bristles in ocular area ( Fig. 7View FIGURE 7 E). Coxa IV separation 1.16 times their width. Femur I/II/III/IV 0.8 / 0.76 / 0.58 / 0.74; patella I 0.26; tibia I 0.74; metatarsus I 0.74; tarsus I 0.46. Legs pattern same as male, tibia I prolateral macroseta straighter ( Fig. 7View FIGURE 7 F). TmI 0.22. Epigynum ventral plate prominent ( Figs 6View FIGURE 6 C; 15 C). Spermathecae oblong. Copulatory ducts long and coiled, with its origin in the ventral part of the spermathecae. Fertilization duct originating from the dorsal part of the spermatheca, running ectally ( Figs 6View FIGURE 6 D; 16 C).

Variation: Males (n= 5): Total length 1.72–2.06; carapace length 0.92–1.02; carapace width 0.78–0.88; femur I length 1.0– 1.1. Females (n= 10): Total length 1.68–2.08; carapace length 0.8–0.88; carapace width 0.66–0.76; femur I length 0.76–0.88.

Distribution: States of São Paulo, Santa Catarina, Rio Grande do Sul, in Brazil ( Fig. 17View FIGURE 17).

Material examined (N= 17): BRAZIL, São Paulo: São José do Barreiro, Parque Nacional da Serra da Bocaina (22 º 43 'S; 44 º 36 'W), 1 ɗ, 28 /IV– 3 /V/ 2002, Equipe Biota col. ( IBSPAbout IBSP 60020); Santa Catarina: Campo Belo do Sul (27 ° 53 ' 56 ''S; 50 ° 45 ' 39 ''W), 1 Ψ, 23–27 /XI/ 2007, T. G. Pinto col. (MCN 4207); Rio Grande do Sul: São Francisco de Paula, Centro de Pesquisas e Conservação da Natureza Pró-Mata (29 ° 26 'S; 50 ° 35 'W), 4 ɗ 11 Ψ, 4 /IX/ 2001, R. Ott col. ( MCN 39409View Materials -39410; 39412; 39415; 39417).

IBSP

Instituto Biologico de Sao Paulo

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Linyphiidae

Genus

Exocora