Ariadna abrilae Grismado, 2008,

Giroti, André Marsola & Brescovit, Antonio Domingos, 2018, The taxonomy of the American Ariadna Audouin (Araneae: Synspermiata: Segestriidae), Zootaxa 4400 (1), pp. 1-114: 79-81

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Ariadna abrilae Grismado, 2008


Ariadna abrilae Grismado, 2008 

Figures 49View FIGURE49, 69View FIGURE 69

Ariadna abrilae Grismado, 2008: 342  , figs 5A ‒C, 6A ‒C (♀ holotype from Los Molles [32°14'S; 71°30'W], Rt. 5; Km 188, 10m, Petorca, V Región de Valparaíso, Chile, 27.I.1994, N. Platnick, K. Catley, R. Calderón & T. Allen leg., deposited in AMNH, examined; Paratypes: 3♀ 11imm., same data of the holotype, deposited in AMNH; 1♀ 1imm., same locality of the holotype, 9.XI.1993, N. Platnick, K. Catley, M. Ramírez & T. Allen leg., deposited in MACN-Ar 10592, all examined).— World Spider Catalog (2018).

Additional material examined: CHILE: V Región de Valparaíso: Petorca Province: Los Molles [32°14'S; 71°30'W], Rt. 5; Km 188, 10m, 2♀ 2imm., 9.XI.1993, N. Platnick, K. Catley, M. Ramírez & T. Allen leg. ( AMNH).GoogleMaps 

Diagnosis. Ariadna abrilae  is similar to A. maxima  due to the leg macrosetae of females, but differ by its minute size and the anterior receptaculum with lobes with expanded and rounded tips, and the dorsal lobe sinuous ( Fig. 49C ‒DView FIGURE49) ( Grismado, 2008: 343, figs 6A ‒B).

Description. Male. Unknown.

Female (Los Molles, AMNH). Carapace and chelicerae brownish orange ( Fig. 49AView FIGURE49). Endites orange; labium dark orange. Sternum orange with darker margins, and four pairs of fainted dark marginal areas ( Fig. 49BView FIGURE49). Palps orange, darkening gradually in distal direction. Legs orange, pairs I ‒II darker. Abdomen grey, lighter ventrally ( Fig. 49A ‒BView FIGURE49). Total length 6.2; carapace 2.08 long, 1.32 wide. Legs: robust and sparsely coated with setae; legs I ‒II with ventro-prolateral and ventro-retrolateral tibial macrosetae of similar size, and metatarsal macrosetae of different sizes ( Fig. 49C ‒DView FIGURE49). Leg formula: I-II-IV-III. Leg measurements: I, femur 1.44, patella 0.68, tibia 1.16, metatarsus 1.04, tarsus 0.4, total 4.72; II, 1.32, 0.64, 1.04, 0.96, 0.36, 4.32; III, 1.16, 0.52, 0.68, 0.64, 0.32, 3.32; IV, 1.44, 0.72, 1.08, 0.84, 0.36, 4.44. Macrosetae: I, femur d0-0-1-0-0-0-2, p0-0-0-0-0-2/1-1; tibia p0-1-0-1-0-1-0, vp1-0-1-0-1-1/0-1, vr1-0-1-0-1-0-1, r0-1-0-1-0-1-0; metatarsus vp1-1-1-1-1-1-1, vr1-1-1-1-1-1-1 ( Fig. 49C ‒DView FIGURE49); II, femur d0-1-1-1/0-0-0-2, p0-0-0-0-0-0-1; tibia p0-1-0-1-0-1-0, vp1-0-1-0-1-0-1, vr1-0-1-0-1-0-1, r0-1-0-1-0-1-0; metatarsus vp1-1-1-1-1-1-1, vr1-1-0-1/0-1-1-1; IV, metatarsus vr metatarsal comb with 3 macrosetae. Internal genitalia: anterior receptaculum with the glandular ducts plate in the median region ( Fig. 49E ‒FView FIGURE49).

Variation. Female (n=6): total length 4.16‒6.2; carapace 1.88‒2.12 long, 1.28‒1.42 wide; femur I 1.36‒1.70. Distribution: Chile (Valparaíso) ( Fig. 69View FIGURE 69). 


American Museum of Natural History