Guasuctenus longipes ( Keyserling, 1891 ), Polotow & Brescovit, 2019

Polotow, Daniele & Brescovit, Antonio D., 2019, Guasuctenus gen. nov., a new Neotropical spider genus of Ctenidae (Araneae), Zootaxa 4624 (4), pp. 539-550: 543-545

publication ID

https://doi.org/10.11646/zootaxa.4624.4.6

publication LSID

lsid:zoobank.org:pub:B8075237-A0FD-4884-9DAA-3F76CB93528A

persistent identifier

http://treatment.plazi.org/id/161387C4-5C0B-FFE9-B790-4F76311CD79A

treatment provided by

Plazi

scientific name

Guasuctenus longipes ( Keyserling, 1891 )
status

comb. nov.

Guasuctenus longipes ( Keyserling, 1891)   comb. nov.

Figs 1–5 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 View FIGURE 5 , 8 View FIGURE 8

Ctenus longipes Keyserling, 1891: 150   , pl. 4, fig. 103 (male holotype from Rio Grande, Rio Grande do Sul, Brazil, von Ihering coll., deposited in BMNH 1890.7.1.2913, examined). Strand 1909: 305; Mello-Leitão 1936: 10, pl. 1, fig. 14, pl. 2, figs 12−13; Polotow & Brescovit 2014, fig. 9C−D; World Spider Catalog 2019.

Ctenus griseus Keyserling, 1891: 152   , pl. 4, fig. 105 (female holotype from Rio Grande, Rio Grande do Sul, Brazil, E. Keyserling coll., deposited in BMNH 1890.7.1.2916, examined). World Spider Catalog 2019. Syn. Nov.

Ctenus vertebratus F.O. Pickard-Cambridge, 1902: 404   , pl. 7, fig. 11 (female holotype from Taquara, Rio Grande do Sul, Brazil, deposited in BMNH, not examined). Mello-Leitão 1931: 13, fig. 4; Mello-Leitão 1936: 30, fig. 13 (Syn.); World Spider Catalog 2019.

Diagnosis. Males of Guasuctenus longipes   ( Fig. 5A View FIGURE 5 ) can be distinguished from G. vittatissimus   ( Fig. 7A View FIGURE 7 ) by the median apophysis and base of embolus larger, and RTA slender. Females of Guasuctenus longipes   ( Figs 4B View FIGURE 4 , 5C View FIGURE 5 ) can be distinguished from G. vittatissimus   ( Figs 6B View FIGURE 6 , 7C View FIGURE 7 ) by the median field subpentagonal and shorter lateral projections of the epigynum, pointing to center of the venter of the opisthosoma.

Description. Male (MCTP 47). Carapace, sternum, endites, labium, and legs light brown; chelicerae reddish brown, with basal condyle light brown; opisthosoma with light brown venter and dark brown dorsum with a lighter longitudinal band. Total length 17.30. Carapace 10.30 long and 8.20 wide. Clypeus 0.22 high. Eye diameters: AME 0.36, ALE 0.36, PME 0.48, PLE 0.40. Leg measurements: I: femur 12.20/ patella 5.00/ tibia 13.00/ metatarsus 12.30/ tarsus 5.40/ total 47.90; II: 11.60/ 4.80/ 10.70/ 10.70/ 4.50/ 42.30; III: 10.00/ 3.90/ 8.40/ 9.50/ 3.80/ 35.60; IV: 12.00/ 4.10/ 11.50/ 14.80/ 4.20/ 46.60. Leg formula 1423. Leg spination: tibia I and II v2-2 -2-2-2, r0-1-0, p0-1-0; III and IV v2-2 -2, r1-1, p1-1; metatarsus I and II v2-2 -2, r0-1-0, p0-1-0; III v2-2 -2, p1-1-1, r1-1-1; IV v1-1 -1-1-1-2, r1-1-1, p1-1-1. Palp ( Figs 3 View FIGURE 3 A–C, 5A–B): tibia straight with short RTA; cymbium elongated, longer than tibia; dorsal cymbial apophysis with large base and truncated tip; embolus with large base and curved retrolaterally, with laminar locking lobes; conductor wider than long; tegulum not projected; median apophysis with large base.

Female (MCTP 234). Coloration as in male. Total length 21.9. Carapace 10.5 long and 8.4 wide. Clypeus 0.42 high. Eye diameters: AME 0.34, ALE 0.34, PME 0.36, PLE 0.44. Leg measurements: I: femur 9.1/ patella 4.4/ tibia 8.7/ metatarsus 7.7/ tarsus 3.1/ total 33.0; II: 8.5/ 4.2/ 7.5/ 6.8/ 2.9/ 29.9; III: 7.5/ 3.6/ 6.3/ 6.6/ 2.7/ 26.7; IV: 9.7/ 3.8/ 8.7/ 10.3/ 3.4/ 35.9. Leg formula 4123. Leg spination: tibia I and II v2-2 -2-2-2, r0, p0; III and IV v2-2 -2, r1-1, p1-1; metatarsus I and II v2-2 -2, r0, p0; III v2-2 -2, r1-1-1, p-1-1-1; IV v1-1 -1-1-1-2, r1-1-1, p1-1-1. Epigynum ( Figs 4 View FIGURE 4 B–D, 5C–D): median field subpentagonal, with small lateral excavations and setae covering central area; lateral fields bearing robust lateral projections; copulatory ducts curved inward; base of spermathecae bean-shaped and head of spermathecae with reborded margins; fertilization ducts laminar.

Variation. 10 males: total length: 16.3–24.4; carapace length: 8.6–13.5; femur I length: 9.6– 13.9. 10 females: total length: 16.6–29.8; carapace length: 8.6–13.5; femur I length: 7.6–11.9.

Additional material examined. BRAZIL. Santa Catarina. Seara (-27.147, -52.336), 1 male, 31.I.1996, A.B. Bonaldo, A. Kury & R. Rocha coll. ( MCN) GoogleMaps   ; Jacinto Machado (-49.763, -28.997), 1 female, XII.1976, J.E. Lima coll. ( IBSP 2844 View Materials ) GoogleMaps   . Rio Grande do Sul. Bom Jesus (-28.610, -50.427), 1 female, 28–30.III.1998, A.B. Bonaldo coll. ( MCN 29279 View Materials ); ( Itaimbézinho , -28.650, -50.637) GoogleMaps   2 females, 3.XI.1962, L. Buckup coll. ( MCN 1804)   . Nova Prata (-28.785, -51.608), 1 female, 20.IV.1973, E.J. Hilani coll. ( MCN 3648) GoogleMaps   ; Arroio do Tigre (-29.334, -53.088), 1 female, 6.V.1978, E.H. Buckup coll. ( MCN 7832) GoogleMaps   ; Bento Gonçalves (-29.154, -51.519), 1 male, 30.III.1991, M. Bernardo coll. ( MCTP 47 View Materials ) GoogleMaps   ; 1 male, 15.III.1993, V. Bernardes coll. ( MCTP 3060 View Materials ) GoogleMaps   ; 2 males, IV.1995, A. Bernardo coll. ( MCTP 6190 View Materials )   ; Canela (-29.352, -50.802), 1 male, 5.II.1977, A. Lise coll. ( MCN 5182) GoogleMaps   ; 1 male, 3.III.2003, C. Lessa coll. ( MCN 35200 View Materials ) GoogleMaps   ; São Francisco de Paula (-29.273, -50.534), 1 female, 14.V.1993, A. Braul coll. ( MCTP 6233 View Materials ) GoogleMaps   ; 1 male, Pristo coll. ( MNRJ 13053 View Materials ); ( Pró-Mata , -29.480, -50.174) GoogleMaps   1 female, 9.X.1994, A. Braul & R. Ott coll. ( MCTP 5481 View Materials ); ( Cazuza Ferreira , -28.931, -50.658) GoogleMaps   1 male, 24.III.1973, A. Lise coll. ( MCN 915)   ; Torres (-29.342, -49.765), 1 female, 29.X.1956, T. Lessa coll. ( MCN 1730) GoogleMaps   ; Santa Maria (-29.703, -53.742), 1 male, 27. VI.1999, L. Indrusiak coll. ( IBSP 168743 View Materials ) GoogleMaps   ; 1 male, 01/IV/2000, L. Indrusiak coll. ( IBSP 214684 View Materials ); (Zona Urbana)   , 1 male, IV.2000, L. Indrusiak coll. ( IBSP 168745 View Materials )   ; Santa Cruz do Sul (-29.724, -52.428), 1 female, VIII.1950, R. Steinhaus coll. ( IBSP 1120 View Materials ) GoogleMaps   ; 1 male, 22.IV.1995, R. Ott coll. ( MCTP 6111 View Materials ) GoogleMaps   ; Novo Hamburgo (-29.725, -51.086), 1 female, 17. VI.1988, C.J. Becker coll. ( MCTP 234 View Materials ) GoogleMaps   ; 2 female, 1.X.1986, C.J. Becker coll. ( MCTP 248 View Materials , 249 View Materials )   ; Taquara (- 29.651, -50.784), 1 female, 17.IV.1975, A. Lise coll. ( MCN 2581) GoogleMaps   ; Maquiné (-29.611, -50.240), 1 female, 16.I.1993, G.L. Fiorentia coll. ( MCTP 3129 View Materials ); ( Fepagro , -29.650, -50.200) GoogleMaps   , 1 female, 18–27.I.2002, Equipe Biota coll. ( IBSP 88096 View Materials )   ; São Leopoldo (-29.764, -51.147), 1 female, 26.IV.1963, T. Lessa coll. ( MCN 1219) GoogleMaps   ; Rio Pardo (-29.994, -52.442), 1 male, 10.II.1969, A. Lise coll. ( MCN 418) GoogleMaps   ; Porto Alegre (-30.021, -51.179), 1 female, Gliesch coll. ( MNRJ 13035 View Materials ) GoogleMaps   ; 1 female, 5.IV.1968, A. Lise coll. ( MCN 659)   ; 1 female, 15.IV.1968, A. Lise coll. ( MCN 384)   ; 1 female, 12.VIII.1991, D. Picada coll. ( MCTP 1580 View Materials )   ; 1 male, 27.I.1995, E.M. da Silva coll. ( MCN 26481 View Materials )   ; Viamão (Itapuã, Praia das Pombas , -30.340, -51.036), 1 female, 13/12/1994, A.P. Lopes coll. ( IBSP 52224 View Materials ) GoogleMaps   . URUGUAY. 1 male, 1991, M. Simó coll. ( IBSP 11908 View Materials )   ; Treinta y Tres. Treinta y Tres, ( Yerbal Chico river , -32.927, -54.456), 1 male ( FCE) GoogleMaps   .

Courtship behavior. Recently described by Trillo et al. (2018) from specimens collected at the ravine shorelines of Yerbal Chico river, close to Quebrada de los Cuervos, Treinta y Tres, Uruguay. Vouchers were examined and the identification was confirmed.

Distribution. Southern Brazil and Uruguay ( Fig. 8 View FIGURE 8 ).

MCN

McNeese State University

VI

Mykotektet, National Veterinary Institute

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Ctenidae

Genus

Guasuctenus

Loc

Guasuctenus longipes ( Keyserling, 1891 )

Polotow, Daniele & Brescovit, Antonio D. 2019
2019
Loc

Ctenus vertebratus F.O. Pickard-Cambridge, 1902: 404

Mello-Leitao, C. F. de 1936: 30
Mello-Leitao, C. F. de 1931: 13
Pickard-Cambridge, F. O. 1902: 404
1902
Loc

Ctenus longipes

Mello-Leitao, C. F. de 1936: 10
Strand, E. 1909: 305
Keyserling, E. 1891: 150
1891
Loc

Ctenus griseus

Keyserling, E. 1891: 152
1891