Acanthoctenus spiniger Keyserling, 1877

Arizala, Stephany, Labarque, Facundo Martín & Polotow, Daniele, 2021, Revision of the Neotropical spider genus Acanthoctenus (Araneae: Ctenidae Acanthocteninae), Zootaxa 4920 (1), pp. 1-55 : 12-17

Acanthoctenus spiniger Keyserling, 1877

Figs 10A , 11–14

Acanthoctenus spinigerus Keyserling, 1877: 693 , plate 8, fig. 60 (male holotype from Mexico, Veracruz, Córdoba, [18º53’15.9”N, 96º56’03.2”W], deposited in NHM 1890.7.1.2924, examined).—F.O. Pickard-Cambridge 1897: 103, plate 4, fig. 3b—Mel-lo-Leit„o 1936: 192, fig. 12.— Forster & Wilton 1973: 293, fig. 1042.— World Spider Catalog 2020.

Acanthoctenus spiniger — Simon 1892: 229.— Silva-Dávila 2003: 49, fig. 19d.— World Spider Catalog 2020.

Other material examined. MEXICO. Veracruz: Orizaba , [18º51’01.7”N, 97º06’13.1”W], 1 male, 2 females, N. Banks coll. ( MCZ) ; San Luis Potosí: Xilitla City, Las Pozas , 21º23’50”N, 98º59’38”W, 600 m. a.s.l., 1 female, 14–18.XI.2011, UNAM AracnoLab coll. ( UNAM JAM231 ) ; Tamazunchale , [21º20’28.4”N, 98º57’49.9”W], 1 female, 23.XI.1946, E.S. Ross coll. ( CAS) ; Chiapas: Selva el Ocote Biosphere Reserve , 32 Km NW Ocosocuautla, [16º59’35.5”N, 93º38’27.8”W], 762 m. a.s.l., 1 female, 27.VIII.1972, C. Mullinex & D.E. Breedlove coll. ( CAS) .

Diagnosis. Males of Acanthoctenus spiniger ( Figs 11 C–D, 12A–B) resemble those of A. virginea stat. res., comb. nov. ( Figs 31 C–D, 32A–B) by the palpal tibia retrolaterally swollen and the RTA short, wider than long. It can be distinguished by the cymbial projection with a slightly anterior slope in ventral view and by the median apophysis with a wider than long proapical hook. Acanthoctenus virginea stat. res., comb. nov. presents a pronounced anterior slope in the cymbial projection and a longer than wide proapical hook in the median apophysis. Females of Acanthoctenus spiniger ( Figs 12 C–D, 13C, 14A–B) resemble those of A. virginea stat. res., comb. nov. ( Figs 32 C–D, 33C–D) by the median sector subpentagonal, but it can be distinguished by the anterior border of lateral sectors forming a 90° angle with the median sector longitudinal axis, and by the atrium subtriangular, whereas A. virginea stat. res., comb. nov. presents straight anterior border of the lateral sectors forming a 60° angle with the median sector longitudinal axis and a suboval atrium.

Description. Male (holotype NHB 1890.7.1.2924). Total length 11.30. Carapace 6.00 long and 5.00 wide. Clypeus 0.25 high. Eye diameters: AME 0.23, ALE 0.10, PME 0.30, PLE 0.25. Leg measurements: I: femur 8.00/ patella 4.00/ tibia 9.00/ metatarsus 8.40/ tarsus 2.80/ total 32.2; II: 7.00/ 4.00/ 7.00/ 7.00/ 2.00/ 27.00; III: 6.00/ 2.00/ 4.90/ 5.80/ 2.10/ 20.80; IV: 8.40/ 3.80/ 7.00/ 9.00/ 3.00/ 31.20. Leg formula 1423. Leg spination: tibia I and II v-2-2-2-2-2-2-2-2-2, p-1-1-0-1, r-1-0-1-1, III and IV v-2-2-2, r1-1, p1-1; metatarsus I and II v-2-2-2- 2-2, p-1-1-1, r-1-1, III v-1-1-1-1-1, p-1-1-1, r-1-1, IV v-1-1-1-1-1, p-1-1, r-1-1-1. Palp ( Figs 11 C–D, 12A–B): tibia shorter than cymbium, swollen retrobasally; RTA with blunt tip; cymbium elongated and with retrobasal projection; embolus elongated, cylindrical, and curved; conductor hyaline and following the tip of embolus; median apophysis laminar and long, spatula-shaped, with a proapical hook.

Female (CAS, Chiapas). Total length 10.50. Carapace 4.92 long and 4.36 wide. Clypeus 0.28 high. Eye diameters: AME 0.20, ALE 0.14, PME 0.28, PLE 0.23. Leg measurements: I: femur 6.08/ patella 2.51/ tibia 6.90/ metatarsus 5.71/ tarsus 1.85/ total 23.05; II: 5.57/ 2.49/ 5.30/ 4.87/ 1.54/ 19.77; III: 4.24/ 1.57/ 3.68/ 4.46/ 1.39/ 15.34; IV: 5.62/ 2.16/ 5.46/ 6.68/ 2.08/ 22.00. Leg formula 1432. Leg spination: tibia I v-2-2-2-2-2-2-2-2-2, p-1-0- 1-1-1, r-0-1-0,1,1, II v 2-2-2-2-2-2-2-2-2, p-0-0-1-1, r-0-1-1-1, III v-2-2-2, p-1-1, r1-1-1, IV v-2-2-2, p-1-1, r 1-1; metatarsus I, II v-2-2-2-2-2, p-1, r-1, III and IV v-1-1-1-1, p-1-1-, r-1-1-1. Epigynum ( Figs 12 C–D, 13C, 14A–B): median sector subpentagonal, wide anteriorly and extending into the atrium, projected posteriorly; anterior border of the lateral sectors strongly curved; atrium subtriangular, slightly sclerotized; copulatory ducts curved, S-shaped; spermathecae head quote-shaped, with apical glandular openings, spermathecae base curled; fertilization ducts tubular, slanting outwards.

Variation. Four females: total body length 10.50–16.20; carapace length 4.92–6.20.

Distribution. Central-east Mexico ( Fig. 10A ).

Figures

FIGURE 10. Distribution map of Acanthoctenus species. A, south of North America and Central America; B. north of South America.

FIGURE 11. Acanthoctenus spiniger Keyserling, 1877, male holotype (NHB 1890.7.1.2924). A–B, habitus; A, dorsal; B, ventral. C–D, male palp; C, ventral; D, retrolateral.

FIGURE 12. Acanthoctenus spiniger Keyserling, 1877, copulatory organs.A–B, male palp (holotype NHB 1890.7.1.2924); A, ventral; B, retrolateral. C–D, female genitalia (CAS); C, epigynum, ventral; D, internal genitalia, dorsal.

FIGURE 13. Acanthoctenus spiniger Keyserling, 1877, female (CAS).A, habitus, dorsal; B, ocular area, frontal; C, epigynum, ventral.

FIGURE 14. Acanthoctenus spiniger Keyserling, 1877, female (CAS). A, epigynum, ventral; B, internal genitalia, dorsal (asterisk to gland openings).

FIGURE 31. Acanthoctenus virginea (Kraus, 1955) stat. res., comb. nov., male holotype (SMF 8676).A–B, habitus; A, dorsal; B, ventral. C–D, male palp; C, ventral; D, retrolateral. E, original collection label.

FIGURE 32. Acanthoctenus virginea (Kraus, 1955) stat. res., comb. nov., copulatory organs. A–B, male palp (holotype, SMF 8676); A, ventral; B, retrolateral. C–D, female genitalia (paratype, SMF 8674); C, epigynum, ventral; D, internal genitalia, dorsal.