Scytodes chapeco, 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: 40-41

publication ID

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

persistent identifier

http://treatment.plazi.org/id/174E87B6-FF8F-B55D-98D6-FC86FAB2449C

treatment provided by

Plazi

scientific name

Scytodes chapeco
status

new species

Scytodes chapeco   new species

Figs. 141–146 View FIGURES 141 – 152. 141 – 146

Type material: Holotype: male from Monte Alegre [27 ° 18 ' S; 50 ° 25 ' W], Chapecó   , Santa Catarina, Brazil, 2001–2002, J.M. Marques, deposited in IBSP 91945.

Paratypes: BRAZIL. Paraná: Pinhão [25 ° 43 ' S; 51 ° 37 ' W] (Barra do Capoteiro, Usina Hidrelétrica de Segredo), 13, 21 February 1992, R. Pinto da Rocha ( MZSP 14682). Rio Grande do Sul: São Valentin [27 ° 33 ' S; 52 ° 31 ' W], 13 1 Ƥ, 16 October 1976, S. Scherer ( IBSP 36504); Encantado [29 ° 15 ' S; 51 ° 52 ' W], 1 Ƥ, 24 May 1986, A D. Brescovit ( MCN 15117 View Materials ); Igrejinha [29 ° 34 ' S; 50 ° 47 ' W], 13 3 Ƥ, 19 October 1967, P. de Biasi ( MZSP 7665); Canela [29 ° 22 ' S; 50 ° 49 ' W] (Barragem dos Bugres), 33 23, 1– 4 November 1999, A.B. Bonaldo, ( IBSP 38346; MCN 32064 View Materials ); Guaíba [30 °06' S; 51 ° 19 ' W] (Fazenda São Maximiliano), 13, 26 August 1994, A.A. Lise ( MCTP 6031).

Other material examined. BRAZIL. Santa Catarina: Nova Teutônia [27 o 11`S; 52 o 23`W], 13, F. Plaumann ( SMF 1821); Rio Grande do Sul: Derrubadas [27 °00'– 27 °02' S; 53 ° 40 '– 54 ° 10 ' W] (Parque Estadual do Turvo   ), 63, 11– 18 January 2002, Equipe Biota ( IBSP 92356; 92364; 92362; 92360; 92366; 92357); São Valentin [27 ° 33 ' S; 52 ° 31 ' W], 23 6 Ƥ 5 juvs., 16 October 1976, S. Scherer (MCN 4677; 4693); Garruchos [28 ° 10 ' S; 55 ° 38 ' W], 13 7 Ƥ 2 juvs, 6 December 1975, A.A Lise, (MCN 3208; 3178); Caxias do Sul [29 ° 10 ' S; 51 ° 10 ' W] (Água Azul), 1 Ƥ, 15 September 1976, M.I. Tavares (MCN 4471); Encantado [29 ° 15 ' S; 51 ° 52 ' W], 1 Ƥ, 21 September 1985, A D. Brescovit ( MCN 14527 View Materials ); Canela [29 ° 22 ' S; 50 ° 49 ' W], 13 5 Ƥ 1 juv., 26 December 1984, A A Lise (MCN 2466); (Barragem dos Bugres), 63 2 Ƥ 8 juvs., 1–4 November 1999, A B. Bonaldo ( MCN 30688 View Materials ).

Etymology. The specific name is a noun in apposition that refers to the type locality of the holotype.

Diagnosis. Scytodes chapeco   n.sp. is distinguished from the remaining Neotropical Scytodes   by truncated and bifid distal area of the male palpal bulb ( Figs. 142, 144 View FIGURES 141 – 152. 141 – 146 ) and by the inconspicuous positioning ridges in the female epigynum ( Fig. 145 View FIGURES 141 – 152. 141 – 146 ).

Description. Male (Holotype, IBSP 91945). Carapace orange with brown pattern as shown on Fig. 141 View FIGURES 141 – 152. 141 – 146 . Chelicerae pale yellow with longitudinal brown stripe. Pedipalps yellow. Palpal tibiae with longitudinal, prolateral brown stripe. Labium orange with brown margins and large brown mark at base. Endites pale yellow. Sternum pale yellow with brown markings in front of each coxae, extending towards the center. Legs yellow, except patella I brown. Femora I-IV with pair of ventral, longitudinal brown stripes. Tibiae I-IV with transversal median brown stain. Abdomen pale yellow with black pattern ( Fig. 141 View FIGURES 141 – 152. 141 – 146 ). Total length 3.0. Carapace slightly domed, 1.7 long, 1.4 wide. Eye diameters: PME 0.10, ALE 0.12, PLE 0.12. Lateral eyes on a tubercle. Chelicerae with subapical hyaline keel and inconspicuous stridulatory ridges. Labium 0.10 long, 0.18 wide. Sternum 0.94 long, 0.76 wide. Leg measurements: I: femur 3.0, patella 0.4, tibia 3.3, metatarsus 3.8, tarsus 0.6, total 11.1; II: 2.2, 0.4, 2.3, 2.4, 0.5, 7.8; III: 1.4, 0.4, 1.3, 1.4, 0.4, 4.9; IV: 2.1, 0.4, 1.9, 2.0, 0.6, 7.0. Palpal femur with short and stout stridulatory pick with rounded and projected socket. Cymbium with single strong distal spine ( Fig. 142 View FIGURES 141 – 152. 141 – 146 ). Bulb 0.82 long, medially constricted and slightly bent, forming a small dorsal hump ( Figs. 142–143 View FIGURES 141 – 152. 141 – 146 ). Distal region truncated and bifid with a long retrolateral sclerotized process ( Figs. 142–144 View FIGURES 141 – 152. 141 – 146 ). Abdomen 1.3 long, 1.4 wide, covered with slender hairs.

Female (Paratype, MZSP 7665). Coloration pattern as in male. Total length 5.1. 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 0.20 long, 0.22 wide. Sternum 1.26 long, 0.94 wide. Leg measurements: I: femur 3.1, patella 0.6, tibia 3.4, metatarsus 4.2, tarsus 0.7, total 12.0; II: 2.4, 0.6, 2.4, 2.9, 0.6, 8.9; III: 1.7, 0.6, 1.4, 1.8, 0.5, 6.0; IV: 2.3, 0.6, 2.2, 2.5, 0.6, 8.2. Palpal femur as in male. Epigynum with inconspicuous positioning ridges ( Fig. 145 View FIGURES 141 – 152. 141 – 146 ). Vulva with slightly oval spermathecae on short and narrow stalks, adjacent to large oval hyaline pockets, partially fused at base, with no conspicuous sclerotized area ( Fig. 146 View FIGURES 141 – 152. 141 – 146 ). Abdomen 2.8 long, 2.3 wide, as in male.

Variation. Ten males: total length 3.5–5.9; carapace 2.0– 2.6; femur I 4.6–5.7; bulb 0.58–0.82. Ten females: total length 4.5–5.1; carapace 2.1–2.4; femur I 3.0– 3.7.

Distribution. Atlantic Forest. Known from the states of Paraná, Santa Catarina e Rio Grande do Sul.

IBSP

Instituto Biologico de Sao Paulo

MZSP

Sao Paulo, Museu de Zoologia da Universidade de Sao Paulo

MCTP

Museu de Ciencias

SMF

Forschungsinstitut und Natur-Museum Senckenberg

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Scytodidae

Genus

Scytodes