The taxonomy of the American Ariadna Audouin (Araneae: Synspermiata: Segestriidae) Author Giroti, André Marsola Author Brescovit, Antonio Domingos text Zootaxa 2018 2018-03-26 4400 1 1 114 journal article 30419 10.11646/zootaxa.4400.1.1 2b7bf048-65d5-4814-bbdb-59d53d15b00e 1175-5326 1207641 59CC08B8-5B13-42EC-943E-C930D7D0DD7F 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 ). FIGURE 52. Ariadna araucana Grismado, 2008 . Male from La Unión (AMNH) (A‒E): habitus, dorsal (A) and ventral view (B); right leg I, prolateral (C) and retrolateral view (D); right metatarsus I, ventral view (E). Female from Maicolpué (AMNH) (F‒I): habitus, dorsal (F) and ventral view (G); right leg I, prolateral (H) and retrolateral view (I). Scale bar: 1mm. FIGURE 53. Ariadna araucana Grismado, 2008 . Male from La Unión (AMNH) (A‒B): left palp, prolateral view (A) (arrowhead = chemosensory patch), and retrolateral view (B). Female from Las Lajas (AMNH) (C‒D): internal genitalia, lateral view (E); anterior receptaculum, ventral view (F). Scale bar: 1mm. 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 ).