Ariadna araucana 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: 84-86

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Ariadna araucana Grismado, 2008


Ariadna araucana Grismado, 2008 

Figures 52‒53View FIGURE 52View FIGURE 53, 70View FIGURE 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 ‒BView FIGURE 53); females of A. araucana  differ from A. lalen  n. sp. by the presence of an anterior receptaculum, flattened laterally, without incrassated regions ( Fig. 53C ‒DView FIGURE 53).

Description. Male (La Unión, AMNH). Carapace and chelicerae dark reddish brown ( Fig. 52AView FIGURE 52). Endites reddish orange; labium dark reddish orange. Sternum reddish orange with darker margins, and four pairs of fainted dark marginal areas ( Fig. 52BView FIGURE 52). Palps light orange ( Fig. 53A ‒BView FIGURE 53). Legs orange with pair I ‒II darker ( Fig. 52C ‒EView FIGURE 52). Abdomen grey, lighter ventrally ( Fig. 52A ‒BView FIGURE 52). Total length 9.92; carapace 4.88 long, 3.44 wide. Carapace with cephalic region elevated. Carapace and chelicerae with a glazy appearance ( Fig. 52AView FIGURE 52). 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 ‒BView FIGURE 53). Legs slender densely coated with setae, and with macrosetae of similar sizes ( Fig. 52C ‒EView FIGURE 52); 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 ‒EView FIGURE 52); 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 ‒GView FIGURE 52). 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. 52FView FIGURE 52). 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 ‒IView FIGURE 52). 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 ‒IView FIGURE 52); 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 ‒DView FIGURE 53).

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. 70View FIGURE 70).


American Museum of Natural History














Ariadna araucana Grismado, 2008

Giroti, André Marsola & Brescovit, Antonio Domingos 2018

Ariadna araucana

Grismado 2008: 346


Arias 2008