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

Ariadna abrilae Grismado, 2008

Figures 49 , 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).

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‒D ) ( Grismado, 2008: 343, figs 6A‒B).

Description. Male. Unknown.

Female (Los Molles, AMNH). Carapace and chelicerae brownish orange ( Fig. 49A ). Endites orange; labium dark orange. Sternum orange with darker margins, and four pairs of fainted dark marginal areas ( Fig. 49B ). Palps orange, darkening gradually in distal direction. Legs orange, pairs I‒II darker. Abdomen grey, lighter ventrally ( Fig. 49A‒B ). 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‒D ). 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‒D ); 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‒F ).

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. 69 ).

Figures

FIGURE 69. Locality of the specimens of A. tarsalis, A. cephalotes, A. calilegua, A. changellkuk and A. abrilae examined in the present study.

FIGURE49. Ariadna abrilae Grismado, 2008.Female from Los Molles (AMNH) (A‒D) and Los Molles (Paratype) (AMNH) (E‒F): habitus, dorsal (A) and ventral view (B); right leg I, prolateral (C) and retrolateral view (D); internal genitalia, lateral view (E); anterior receptaculum, ventral view (F). Scale bar:1mm.