Scytodes guapiassu, Rheims, Cristina A. & Brescovit, Antonio D., 2009

Rheims, Cristina A. & Brescovit, Antonio D., 2009, New additions to the Brazilian fauna of the genus Scytodes Latreille (Araneae: Scytodidae) with emphasis on the Atlantic Forest species, Zootaxa 2116, pp. 1-45: 11-13

publication ID

http://doi.org/ 10.5281/zenodo.187984

persistent identifier

http://treatment.plazi.org/id/174E87B6-FFA2-B579-98D6-FD2CFAA24502

treatment provided by

Plazi

scientific name

Scytodes guapiassu
status

new species

Scytodes guapiassu   new species

Figs. 32–37 View FIGURES 32 – 43. 32 – 37

Type material: Holotype: male from Reserva Biológica de Una   , Una   [15 ° 18 ' S; 39 °04' W], Bahia, Brazil, 15–28 November 2000, A D. Brescovit et al., deposited in IBSP 53666.

Paratypes: BRAZIL: Bahia: Una   [15 ° 18 ' S; 39 °04' W] (Reserva Biológica de Una   ), 23 2 Ƥ, 15–28 November 2000, A D. Brescovit et al. ( IBSP 53671, 53673, 53668). Espírito Santo: Santa Tereza [19 ° 55 ' S; 40 ° 36 ' W], 43, April – August 2007, T. Souza et al. ( MZSP 28955, IBSP 87971). Rio de Janeiro: Cachoeiras de Macacú [22 ° 28 ' S; 42 ° 38 ' W] (Reserva Ecológica de Guapi-Assú), 2 Ƥ, 8–12 November 2001, Equipe Biota ( IBSP 97161, MZSP 28956).

Other material examined. BRAZIL: Bahia: Una   [15 ° 18 ' S; 39 °04' W], (Reserva Biológica de Una   ), 4 Ƥ, 15–28 November 2000, A D. Brescovit et al. ( IBSP 53664, 46886, 53665). Rio de Janeiro: Teresópolis (Parque Nacional da Serra dos Orgãos) [22 ° 27 ' S; 42 ° 59 ' W], 2 Ƥ, 18–22 August 2001, Equipe Biota ( IBSP 92289, 92290); Cachoeiras de Macacú (Reserva Ecológica de Guapi-Assú) [22 ° 28 ' S; 42 ° 38 ' W], 1 Ƥ, 8–12 November 2001, Equipe Biota ( IBSP 97162); Volta Redonda (Floresta da Cicuta) [22 ° 31 ' S; 44 °07' W], 5 Ƥ, 11–18 June 2001, Equipe Biota, ( IBSP 97153–97155).

Etymology. The specific name is a noun in apposition and refers to the type locality of some of the paratypes.

Diagnosis. Males of S. guapiassu   n.sp. are distinguished from those of the remaining Scytodes   by the palp with a subdistal, ventral lamina ( Fig. 33–35 View FIGURES 32 – 43. 32 – 37 ). The females are distinguished by the single, large hyaline pocket with large lateral sclerotized areas in the epigynum ( Fig. 37 View FIGURES 32 – 43. 32 – 37 ).

Description. Male (Holotype, IBSP 53666) Carapace pale orange, medially lighter, with brown pattern as shown on Fig. 32 View FIGURES 32 – 43. 32 – 37 . Chelicerae pale orange with dorsal, longitudinal, brown stripe. Pedipalps pale orange with dorsal and prolateral brown markings. Labium and endites pale yellow. Sternum pale yellow with brown margins in front of each coxae. Legs pale orange. Femur I –IV with pair of ventral, longitudinal brown stripes. Tibia I –IV with median, transversal brown band and brown distal extremities. Abdomen pale gray with black pattern ( Fig. 32 View FIGURES 32 – 43. 32 – 37 ). Total length 3.9. Carapace slightly domed, 2.0 long, 1.6 wide. Eye diameters: PME 0.14, ALE 0.16, PLE 0.16. Lateral eyes on a tubercle. Chelicerae with subapical hyaline keel and 6–7 slightly conspicuous stridulatory ridges. Labium 0.16 long, 0.28 wide. Sternum 1.02 long, 0.88 wide. Leg measurements: I: femur 5.8, patella 0.5, tibia 6.6, metatarsus 7.7, tarsus 0.8, total 21.4; II: 4.0, 0.5, 4.1, 4.7, 0.7, 14.0; III: 2.4, 0.5, 2.2, 2.6, 0.5, 8.2; IV: 3.8, 0.5, 3.4, 4.0, 0.5, 12.2. Palpal femur with stridulatory pick short and stout on triangular, projected socket. Cymbium with pair of strong, distal spines ( Fig. 33 View FIGURES 32 – 43. 32 – 37 ). Bulb 0.64 long, medially constricted. Distal region spoon-like with retrolateral, sclerotized process and subdistal, ventral lamina ( Figs. 33–35 View FIGURES 32 – 43. 32 – 37 ). Abdomen 1.9 long, 1.4 wide, covered with slender hairs.

Female (Paratype, IBSP 53673). Coloration pattern as in male. Total length 3.7. Carapace domed, 2.3 long, 2.0 wide. Eye diameters: PME 0.16, ALE 0.14, PLE 0.16. Lateral eyes on a tubercle. Chelicerae as in male. Labium 0.2 long, 0.2 wide. Sternum 1.08 long, 0.96 wide. Leg measurements: I: femur 3.7, patella 0.6, tibia 4.0, metatarsus 4.8, tarsus 0.8, total 13.8; II: 2.9, 0.5, 2.9, 3.2, 0.6, 10.1; III: 1.9, 0.5, 1.5, 2.0, 0.5, 6.4; IV: 2.8, 0.5, 2.5, 2.8, 0.7, 9.3. Palpal femur as in male. Epigynum with large and ridged, slightly V-shaped positioning ridges ( Fig. 36 View FIGURES 32 – 43. 32 – 37 ). Vulva with rounded spermathecae on short stalks adjacent to single, large, hyaline pocket with large, lateral sclerotized areas ( Fig. 37 View FIGURES 32 – 43. 32 – 37 ). Abdomen 2.7 long, 1.8 wide, as in male.

Variation. Seven males: total length 3.4 –4.0; carapace 1.8–2.1; femur I 4.1–5.8; bulb 0.58–0.64. Ten females: total length 4.2 –5.0; carapace 2.0– 2.4; femur I 2.6–3.8.

Distribution. Atlantic Forest. Known from southern state of Bahia to northern state of Rio de Janeiro.

IBSP

Instituto Biologico de Sao Paulo

MZSP

Sao Paulo, Museu de Zoologia da Universidade de Sao Paulo

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Scytodidae

Genus

Scytodes