Ariadna araucana Grismado 2008
Creators: name: Giroti, André Marsola
name: Brescovit, Antonio Domingos
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Segestriidae
Ariadna
Ariadna araucana

description: Ariadna araucana Grismado, 2008
Figures 52‒53, 70
Ariadna araucana Grismado, 2008: 346, figs 7D‒F, 8A‒G (♂ holotype from NE Puerto Montt [41°28'18"S; 72°56'13"W], Llanquihue ProVince, X Región de Los Lagos, Chile, 22‒28.XII.1985, L. E. Peña leg., deposited in AMNH; 1♀ paratype from 15km S of Chepu [42°03'27"S; 74°01'30"W], Chiloé Island, Chiloé Province, Chile, 3.II.1991, M. Ramírez leg., deposited in MACN-Ar 10090, all examined).— World Spider Catalog (2018).
Note. The male specimen illustrated of the fig. 7A‒C in Grismado (2008) belongs to Ariadna lalen n. sp. herein described.
Additional material examined. CHILE: Without specific data: 1♀ (ex-MNHP-AR 7042); IX Región de Araucanía: Cautín Province: Villa Rica [39°16'S; 72°13"W], Caipara, 2♀, 1894, Silv leg. (MNHN-AR); XIV Región de Los Ríos: Valdivia Province: Sendero Los Alerces, Reserva Costeira Valdiviana (39°24'11.9''S; 72°52'17.86''W), 365m, 2♀5imm., 24‒27.XI.2009, L. Almeida, H. Wood & C. Griswold leg. (IBSP 155003); La Unión, Cudico [40°15'S; 73°09'W], 40m, 2♀1imm., 11.XI.1966, E.I. Schlinger leg. (CAS 9046559); La Unión, 34km WNW La Unión [40°17'S; 73°05'W], 1♂, 17.XII.1984 ‒ 7.II.1985, S. & J. Peck leg. (AMNH); La Unión, Las Lajas, 3♀ 2imm., 9‒13 January 1990, L.E. Peña leg. (AMNH); Huachocopihue, 1♀, 7.III.1965, H. Levi leg. (MCZ 47260); X Región de Los Lagos: Osorno Province: San Juan de la Costa [40°31'S; 73°24'W], hills S Maicolpué, 75m, 3♀3imm., 26.I.1986, N.I. Platnick & R.T. Schuh leg. (AMNH); Llanquihue Province: Puerto Montt, Lago Chapo [41°27'S; 72°30'W], 34km E Pto Montt, 1♂, 24.XII.1984 ‒ 2.II.1985, S. & J. Peck leg. (AMNH); P. N. Alerce Andino [41°27'53,0"S; 72°38'43,4"W], Correntoso, Sendero "Huillifoten", 1♂, 3.II.2005, M. Ramírez & F. Labarque leg. (MACN-Ar 10919); 2♂, 14.V.2005 (MACN-Ar 10920; 10921); Chiloé Province: Isla Chiloé, Mocopulli [42°36'S; 73°57'W], 1♀, 2.II.1983, T. & N. Cekalovic leg. (AMNH); same locality, 2♀, 19.III.1991, T. Cekalovic leg. (AMNH); Isla Chiloé, 15km S of Chepu, 1♀, 3.II.1991, M. Ramírez leg. (MACN-Ar 10092); Palena Province: Chaitén [42°55'S; 72°42'W], roadside at night, 10m, 1♂, 16.I.1986, N.I. Platnick, P.A. Goloboff & R.T. Schuh leg. (AMNH); Chaitén, 1♀, I.1982, M.E. Casanueva leg. (UCCC).
Diagnosis. Ariadna araucana is similar to A. lalen n. sp. due to the presence of reduced mid-portion in the male palp, and females with leg formula II-I-IV-III and absence of the median membranous crack in the interpulmonary fold; males of A. araucana differ from those of A. lalen n. sp. by the presence of sub-rectangular bulb, and mid-portion and embolus tapered (Fig. 53A‒B); females of A. araucana differ from A. lalen n. sp. by the presence of an anterior receptaculum, flattened laterally, without incrassated regions (Fig. 53C‒D).
Description. Male (La Unión, AMNH). Carapace and chelicerae dark reddish brown (Fig. 52A). Endites reddish orange; labium dark reddish orange. Sternum reddish orange with darker margins, and four pairs of fainted dark marginal areas (Fig. 52B). Palps light orange (Fig. 53A‒B). Legs orange with pair I‒II darker (Fig. 52C‒E). Abdomen grey, lighter ventrally (Fig. 52A‒B). Total length 9.92; carapace 4.88 long, 3.44 wide. Carapace with cephalic region elevated. Carapace and chelicerae with a glazy appearance (Fig. 52A). Palps: tibia incrassated, with the dorso-ventral diameter longer than the bulb; cymbium with a dorsal chemosensory patch; bulb sub-rectangular, mid-portion reduced; embolus long, tapered and with a tubular hook-like tip (Fig. 53A‒B). Legs slender densely coated with setae, and with macrosetae of similar sizes (Fig. 52C‒E); tarsal brush of putative chemosensory setae present on legs I‒IV, but reduced. Leg formula: II-I-IV-III. Leg measurements: I, femur 4.84, patella 1.68, tibia 4.08, metatarsus 4.24, tarsus 1.48, total 16.32; II, 4.84, 1.6, 4.2, 4.32, 1.48, 16.44; III, 3.8, 1.44, 2.88, 3.2, 1.24, 12.56; IV, 4.0, 1.6, 3.12, 3.2, 1.12, 13.04. Macrosetae: I, femur d0-0-0-0-0-0-1, p0-0-0-0-0-2-0; tibia p0/1-1-0-1-0/ 1-1-0, vp1-0-1-1-1-0-1-1, vr1-0-1-1-1-0-1-1, r1-1-1-1-0-1/0-1-0/1; metatarsus p0-1-0-0-0-0-0-0, vp0-1-0-0/1-1-1- 1-1, vr0-1-1/0-0-1-0-1-1, r1-0-1-0-0-0-0-0 (Fig. 52C‒E); II, femur d0-0/1-0-0-0-1-0, p0-0-0-0-0-1-0; tibia p0-1-0- 1/0-1-0-1-0, vp0-0-0-0-0-0/1-1-1, vr0-1-1-0/1-1/0-1-1/0-1, r1-0-1-0-0/1-1-0-1; metatarsus p0-1-0-0-0-0-0-0, vp0- 1-0-0-1/0-1-0-1/0, vr0-1-1/0-0-1-1-0-1/0, r0-0-1-0-0-0-0-0; IV, femur D0-1-1-1-0/1-1-0/1-1-0-1-0, r0-0-0-0-0-0-0- 0-0-1-0; tibia p0-1-0-0-1-0-0, vp0-0-1-0-0-0-1, vr0-0-0-0-0-0-1, r0-1-0-0-1-1-0; metatarsus p0-0-1-0-0-1-0, vp0-0- 1-0-0-1-1, vr metatarsal comb with 6 macrosetae, r0-0-1-0-0-0-0.
Female (Maicolpué, AMNH). Coloration as in male, but darker (Fig. 52F‒G). Palps brownish orange, darkening gradually in distal direction. Total length 12.32; carapace 5.76 long, 3.48 wide. Carapace with cephalic region elevated. Carapace and chelicerae with a glazy appearance (Fig. 52F). Legs: robust and densely coated with setae; legs I‒II with tibial ventro-prolateral and ventro-retrolateral macrosetae with similar sizes among themselves, and metatarsal ones also with similar sizes (Fig. 52H‒I). Leg formula: II-I-IV-III. Leg measurements: I, femur 4.2, patella 1.92, tibia 3.2, metatarsus 2.96, tarsus 1.08, total 13.36; II, 4.04, 1.9, 3.36, 3.04, 1.08, 13.42; III, 3.2, 1.6, 2.24, 2.4, 0.96, 10.4; IV, 3.44, 1.84, 2.76, 2.64, 0.96, 11.64. Macrosetae: I, femur p0-0-0-0-0/1-2-0; tibia vp1-1-1-1-1-1, vr1-1-1-1-1-1-0/1-1, r0-0-1-0-0-0; metatarsus vp1-1/0-1-1/0-1-1-1/0-1-1-1-1, vr1-1-1-1-1-1-1- 1-1-1-1 (Fig. 52H‒I); II, femur p0-0-0-0-0-1-0; tibia p0-0-0-0-0-1-0, vp0-0-0-0-0-0-1, vr1/0-1/0-0-1-0/1-1-1; metatarsus vp1-1/0-1-1-1-1-1-1/0-1-1-1, vr1-0-1-0-1/0-1-1-0-0-1; IV, femur d1-1-0-0-0-0-0; tibia v0-1-0-0-1-0-0, vr0-0-0-0-0-0-1; metatarsus p0-0-0-0-0-1/0-0, vp0-1-0-1-1-0-1, v0-0-1-0-0-0-0, vr0-0-0-0-0-1-0 metatarsal comb with 6-7 macrosetae, r0-0-0-0-0-0-1/0. Internal genitalia: interpulmonary fold without a median membranous crack; anterior receptaculum unillobulated, with a small glandular ducts plate in the center of it, and with ventral entapophysis (Fig. 53C‒D).
Variation. Male (n=4): Total length: 7.2‒9.92; carapace 4.12‒4.88 long, 2.56‒3.44 wide; femur I 4.0‒4.84. Female (n=10): Total length: 12.32‒15.84; carapace 5.76‒6.96 long, 3.48‒4.16 wide; femur I 4.0‒4.8. Distribution. Southern Chile (Fig. 70).
description: Published as part of Giroti, André Marsola & Brescovit, Antonio Domingos, 2018, The taxonomy of the American Ariadna Audouin (Araneae: Synspermiata: Segestriidae), pp. 1-114 in Zootaxa 4400 (1) on pages 84-86, DOI: 10.11646/zootaxa.4400.1.1, http://zenodo.org/record/1207641