Xiruana silarae, Oliveira, Luiz Fernando M. & Brescovit, Antonio D., 2015

Oliveira, Luiz Fernando M. & Brescovit, Antonio D., 2015, A taxonomic revision of the Neotropical spider genus Xiruana Brescovit 1997 (Araneae: Anyphaenidae, Anyphaeninae), Zootaxa 3980 (2), pp. 201-229: 212-214

publication ID

http://dx.doi.org/10.11646/zootaxa.3980.2.3

publication LSID

lsid:zoobank.org:pub:13D14535-2FCD-4E8D-A8EC-01CC9D6F38CC

persistent identifier

http://treatment.plazi.org/id/03839756-FFF0-FFBE-FF23-F9C9FC13FB07

treatment provided by

Plazi

scientific name

Xiruana silarae
status

new species

Xiruana silarae  new species

Figs 7View FIGURE 7 A –H; 16 A

Type material. Male holotype and female paratype from Usina Hidrelétrica Engenheiro Sérgio Motta, Porto Primavera (22 ° 31 ' 45 "S; 52 ° 57 ' 11 "W), Rosana, São Paulo, Brazil, I –II. 2000, Equipe IBSP leg., deposited in IBSP 29627.

Etymology. The specific name is a patronymic in honor of Silara Fatima Batista, first author’s wife.

Diagnosis. Males of Xiruana silarae  n. sp. resemble those of X. tetraseta  by the conspicuous projection at the base of the embolus, but differs by having conductor of Anyphaeninae with a serrated border ( Figs 7View FIGURE 7 A, B) and median tibial apophysis truncated, with a dorso-apical projection ( Figs 7View FIGURE 7 D –F). Females are readily recognized by the enlarged anterior border of the epigynal plate ( Fig. 7View FIGURE 7 G).

Description. Male ( IBSP 29627). Coloration as in X. hirsuta  , except by labium and endites darker, tending towards reddish-brown. Total length 8.1, carapace length 3.5, width 2.7. Clypeus height 0.12. Eye diameters and interdistances: AME 0.16, ALE 0.14, PME 0.14, PLE 0.14; AME –AME 0.04, AME –ALE 0.04, PME –PME 0.2, PME –PLE 0.1, ALE –PLE 0.03. Chelicerae 1.75 long, with four promarginal teeth and four retromarginal denticles. Leg measurements: Leg I—femur 3.7 / patella 1.5 / tibia 4.4 / metatarsus 3.75 / tarsus 1.7 / total 15.05; II— 3.3 / 1.4 / 3.4 / 3.1 / 1.3 / 12.5; III— 2.5 / 1.1 / 1.9 / 2.1 / 0.9 / 8.5; IV— 3.6 / 1.25 / 3.1 / 3.9 / 1.05 / 12.9. Leg spination: I—metatarsus p 1 -0-0, r 0-1 -0; II—tibia r 0-1 -0, metatarsus v 2 - 1 -0, p 1 -0-0, r0; III—tibia p 1 - 1 - 1, r 1 - 1 - 1; IV—tibia p 1 - 1 - 1, r 1 - 1 - 1. Palp: median apophysis with wide base, strongly curved medially ( Fig. 7View FIGURE 7 C); branches of retrolateral tibial apophysis equal in length, with conical tips ( Figs 7View FIGURE 7 D –F). Abdomen: length 4.3, epigastric furrow 0.7 from tracheal spiracle, spiracle 2.4 from base of spinnerets.

Female ( IBSP 29627). Coloration as in male. Total length 7.6, carapace length 3.3, width 2.39. Clypeus height 0.14. Eye diameters and interdistances: AME 0.18, ALE 0.16, PME 0.16, PLE 0.16; AME –AME 0.06, AME –ALE 0.06, PME –PME 0.26, PME –PLE 0.18, ALE –PLE 0.03. Chelicerae 2.3 long, with four promarginal teeth and six retromarginal denticles. Leg measurements: Leg I—femur 3.4 / patella 1.6 / tibia 3.6 / metatarsus 3.1 / tarsus 1.49 / total 13.19; II— 3.2 / 1.5 / 3.1 / 2.7 / 1.15 / 11.65; III— 2.5 / 1.2 / 1.7 / 2.0/ 0.8 / 8.2; IV— 3.5 / 1.4 / 2.93 / 3.7 / 1.0/ 12.53. Leg spination: I—tibia v 2 - 2 -0, p0, r0, metatarsus v 2 -0-0, p0, r0; II—tibia v 2 - 2 -0, p 1 - 1 -0, r0, metatarsus v 2 -0-0, p0, r0; IV—tibia p 1 - 1 - 1, r 1 - 1 - 1. Abdomen: length 4.2, epigastric furrow 0.6 from tracheal spiracle, spiracle 2.15 from base of spinnerets. Epigynum: spermathecae rounded; copulatory ducts strongly curved medially, fertilization ducts with same length as spermathecae ( Figs 7View FIGURE 7 G, H).

Variation. Males (n = 10): total length 7.35–8.3; carapace 3.25–4.2; femur I 3.0– 4.3. Females (n = 10): total length 7.6–11.4; carapace 2.9–3.62; femur I 2.5–3.6.

Other material examined. BRAZIL, Mato Grosso: Barra do Tapirapé  (10 ° 52 ' 40 "S; 51 ° 37 ' 58 "W), 1 ♂, 5– 19.XI. 1964, B. Malkin leg. ( AMNH); Goiás: Montividiu (17 ° 26 ' 38 "S; 51 ° 10 ' 30 "W), 1 ♀, 2008, I.M. Bortolin leg. ( IBSP 145394); São Paulo: Botucatu (22 ° 53 '09"S; 48 ° 26 ' 42 "W), Usina São Manoel, 1 ♀, 16.XII. 1986, I.M.P. Rinaldi; L.C. Forti leg. ( IBSP 165980); 1 ♀, 05.XI. 1987, I.M.P. Rinaldi; L.C. Forti leg. ( IBSP 165981); Presidente Epitácio (21 ° 45 ' 53 "S; 52 °06' 19 "W), 1 ♂, 1 ♀, 20–25.III. 2001, J.P. Guadanucci; R. Bertani leg. ( IBSP 38612); 1 ♂, 1 ♀, 30.III. 2001, R.P. Indicatti; C.A.R. Souza leg. ( IBSP 38376); Piracicaba, (22 ° 43 ' 30 "S; 47 ° 38 ' 56 "W), 1 ♂, 7.V. 2003, Prefeitura Municipal de Piracicaba leg. ( IBSP 37869); Porto Primavera, Usina Hidrelétrica Engenheiro Sergio Motta (22 ° 31 ' 45 "S; 52 ° 57 ' 11 "W), 7 ♂, 14 ♀, I –II. 2000, Equipe IBSP leg. ( IBSP 29628); 9 ♂, 14 ♀, I –II. 2000, Equipe IBSP leg. ( IBSP 166396); 8 ♂, 16 ♀, I –II. 2000, Equipe IBSP leg. ( IBSP 29626); São Paulo (23 ° 32 ' 51 "S; 46 ° 38 ' 10 "W), Usina Hidrelétrica de Três Irmãos, 1 ♀, X. 1990, M. Costa; C, Bertim leg. ( IBSP 4820); Paraná: Santa Helena (24 ° 51 ' 37 "S; 54 ° 19 ' 58 "W), Reserva Biológica de Santa Helena, 1 ♂, 12–16.XI. 1991, A.B. Bonaldo leg. ( IBSP 165983).

Distribution. Midwest, Southeast and South Brazil ( Fig. 16View FIGURE 16 A).

IBSP

Instituto Biologico de Sao Paulo

AMNH

American Museum of Natural History

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Anyphaenidae

Genus

Xiruana