Ariadna lalen

Giroti, André Marsola & Brescovit, Antonio Domingos, 2018, The taxonomy of the American Ariadna Audouin (Araneae: Synspermiata: Segestriidae), Zootaxa 4400 (1), pp. 1-114: 98-101

publication ID

http://doi.org/ 10.11646/zootaxa.4400.1.1

publication LSID

lsid:zoobank.org:pub:59CC08B8-5B13-42EC-943E-C930D7D0DD7F

persistent identifier

http://treatment.plazi.org/id/039B87D1-FF85-B17E-169B-F9B4C522F8A1

treatment provided by

Plazi

scientific name

Ariadna lalen
status

new species

Ariadna lalen  new species

Figures 62‒63View FIGURE 62View FIGURE 63, 70View FIGURE 70

Ariadna araucana  — Grismado (2008: 347, figs 7A ‒C) (only ♂), misidentification).

Type-material. ♂ holotype from Reserva Nacional Los Ruiles , elev. 174m (35°50'02,6"S; 72°30'35,7"W), Cauquenes, Cauquenes Province, VII Región de Maule, Chile, 17.VII.2010, A. Ojanguren et al. leg., deposited in MACN-Ar 29457.GoogleMaps  Paratypes: 1♂ from Contulmo Natural Monument [38°01'55"S; 73°04'22"W], Purén, Malleco , IX Región de Araucanía, Chile, 11.XII.1984 ‒ 13.II.1985, S. & J. Peck leg. ( AMNH)GoogleMaps  ; 1♀ 2imm. from Estación Biológica de Hualpén , 10m, Concepción, VIII Región de Bío-Bío, Chile (36°47'51.2"S; 73°09'29.3"W), 15‒16.VII.2010, AGoogleMaps  . Ojanguren et al. leg. (MACN-Ar 29456); 3♀ 2imm. same data of the last (MACN-Ar 2 9454).GoogleMaps 

Notes. One male of this species was illustrated by Grismado (2008: 347, figs 7A ‒C) as a male of A. araucana  . After the examination of this specimen and comparing it with others from the same region of occurence, we assumed that it represents a new species, similar to A. araucana  in the habitus and leg macrosetae pattern, but with differences in the male and female genitalia. Grismado (2008: 353) stated that the vial labeled as “ longipes  ” from “Pissis”, anteriorly recognized as one of the types of Dysdera longipes Nicolet, 1849  by Ramírez (1989) (MNHNP- AR 9069, anteriorly 4211), possess a female specimen that differs from the ones of the vial from Valdivia, with one male and two females ( MNHNP-AR 9067, anteriorly 4133). Because of that, Grismado (2008: 353) designated the specimen from “Pissis” as a non-type Ariadna araucana  , one of his new species. Here we identifiy this female specimen as Ariadna lalen  n. sp., due to differences from A. araucana  in the female genitalia.

Additional material examined. CHILE: VIII Región de Bío-Bío: Concepción Province: Hualpén [36°47'32"S; 73°05'44"W], 1♀, 11.I.1989, M. Ramírez leg. (MACN-Ar 10089); 1♀, E. Maury leg. (MACN-Ar 21348); Estação Ecológica Hualpén , 10m (36°47'51,2"S; 73°09'29,3"W), 1♀, 15‒16.VII.2010, A. Ojanguren et al. leg. (MACN-Ar 29462); " Pissis ", 1♀ ( MNHNP-AR 9069); IX Región de Araucanía: Malleco  Province: Monumento Natural Contulmo (38°00'46.8"S; 73°11'15"W), 2♀ 1imm., 19‒21.XII.1998, M. Ramírez et al. leg. (MACN-Ar 10094); 1♂, 10‒11.II.2005, M. Ramírez & F. Labarque leg. (MACN-Ar 10918).GoogleMaps 

Diagnosis. Ariadna lalen  n. sp. is similar to A. araucana  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 Ariadna lalen  n. sp. differ from those of A. araucana  by the presence of a subrectangular bulb, less rounded than A. araucana  , with mid-portion and embolus markedly bended and thickened ( Fig. 63A ‒BView FIGURE 63); females of A. lalen  n. sp. differ from A. araucana  by the anterior receptaculum, flattened laterally, with the dorsal region incrassated and rounded ( Fig. 63C ‒DView FIGURE 63).

Etymology. The specific name is a noun in apposition taken from the “Mapundungun”, the language spoken by the Mapuche people that live in Araucanía, and other regions of southern Chile and Argentina. It refers to the old legend of the Lalén Kuzé, la “Araña Vieja” (“ancient spider”), a mythological creature that appears to the Mapuche women in their dreams to teach the art of weaving.

Description. Male (Holotype). Carapace and chelicerae dark reddish brown, with cephalic region and chelicerae darker, almost black ( Fig. 62AView FIGURE 62). Endites brown; labium dark brown. Sternum brown with darker margins, and four pairs of fainted dark marginal areas ( Fig. 62BView FIGURE 62). Palps orange ( Fig. 63A ‒BView FIGURE 63). Legs brownish orange, with pairs I ‒II darker ( Fig. 62C ‒EView FIGURE 62). Abdomen grey, lighter ventrally ( Fig. 62A ‒BView FIGURE 62). Total length 8.56; carapace 4.4 long, 3.2 wide. Carapace with cephalic region elevated. Carapace and chelicerae with a glazy appearance ( Fig. 62AView FIGURE 62). Palps: tibia slightly incrassated, almost cilindrical, with the dorso-ventral diameter shorter than the bulb; cymbium with a dorsal chemosensory patch; bulb sub-rectangular, mid-portion reduced; embolus long, thickened and with a tubular hook-like tip ( Fig. 63A ‒BView FIGURE 63); legs slender, densely coated with setae, and with macrosetae of similar sizes ( Fig. 62C ‒EView FIGURE 62); tarsal brush of putative chemosensory setae present on legs I ‒IV, but reduced. Leg formula: II-I-IV-III. Leg measurements: I, femur 4.48, patella 1.6, tibia 3.68, metatarsus 4.44, tarsus 1.52, total 15.72; II, 4.24, 1.68, 4.0, 4.48, 1.48, 15.88; III, 3.48, 1.44, 2.72, 3.2, 1.2, 12.04; IV, 3.56, 1.6, 2.96, 2.92, 1.12, 12.16. Macrosetae: I, femur D0-0-0-0-0-1-0, P0-0-0-0-2-0-0; tibia P0-1-0-1-0-1-0, vp1-1/0-1-0-1-0-1, vr1-1- 0-1-0/1-1-0-1, R0/1-1-0-1-0-1-1-0/1; metatarsus p0-1-0-0-0-0-0-0, vp1-0-1-0-1-1/0-1-1, vr1-0-1-0-1-1/0-1-1, r1-1- 0-0-0-0-0-0 ( Fig. 62C ‒EView FIGURE 62); II, femur D0-0-0-0-0-1-0, P0-0-0-0-0-1-0; tibia P0-0-0-1-0-1-0, vp0-0-0-0-1-0-1, vr0-1- 0/1-0-1-1-1, R0-1-0-1-0-1-0; metatarsus p1-0-0-1/0-0-0-0, vp0/1-0-0-1-0-1-1, vr1-0-1-0-1-0-1, r1-0-0-0-0-0-0; IV, femur D1-1-1-0-0-0-0; tibia V0-0-0-0-0-0-1, R0-0-0-0-0-1-0; metatarsus vp0-1/0-0-0-1-0-1, vr metatarsal comb with 6-7 macrosetae, the two lateral ones longer.

Female (Paratype—MACN-Ar 29456). Coloration of carapace and chelicerae as in male ( Fig. 62FView FIGURE 62). Endites brownish orange; labium dark brownish orange. Sternum brownish orange, with darker margins, and four pairs of fainted dark marginal areas ( Fig. 62GView FIGURE 62). Palps brownish orange, darkening gradually in distal direction ( Fig. 62GView FIGURE 62). Legs brownish orange, with pairs I ‒II darker and with dark pigment forming diffuse rings in the distal region of the tibia, metatarsus and tarsus ( Fig. 62H ‒IView FIGURE 62). Abdomen as in male ( Fig. 62F ‒GView FIGURE 62). Total length 15.6; carapace 5.92 long, 3.6 wide. Carapace with cephalic region elevated. Carapace and chelicerae with a glazy appearance ( Fig. 62FView FIGURE 62). 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. 62H ‒IView FIGURE 62). Leg formula: II-I-IV-III. Leg measurements: I, femur 3.88, patella 1.84, tibia 3.12, metatarsus 3.0, tarsus 1.04, total 12.88; II, 3.84, 1.92, 3.28, 3.04, 1.04, 13.12; III, 3.04, 1.64, 2.32, 2.44, 0.92, 10.36; IV, 3.6, 1.84, 2.76, 2.48, 0.88, 11.56. Macrosetae: I, femur P0-0-0-0-0-2/1-0; tibia vp1-0-1-0-1-0-0/1, vr1-0-1-0-1-0-1; metatarsus vp0-1-0-1-1-1- 1-1-1-1, vr0-1-0/1-0/1-1-1-1/0-1-1 ( Fig. 62H ‒IView FIGURE 62); II, femur P0-0-0-0-0-1-0; tibia P0-0-0-0-1-0, vp0-0-0-0-0-1, vr0- 1-0-1-0-1; metatarsus vp0-1-0-1-1-1-1-1-1, vr0-1-0-1/0-1-1-1-0-1; IV, femur D0-0/1-0/1-0-0-0-0; tibia vr0-0-0-0- 0-0-1; metatarsus p0-1-0-0-0-1-1, vp0-1-0-0-0-0-1, vr metatarsal comb with 7 macrosetae, the two lateral ones longer. Internal genitalia: interpulmonary fold without a median membranous crack; anterior receptaculum with irregular cuticle, hyaline cuticle, and glandular ducts plate located in the proximal region of it ( Fig. 63C ‒DView FIGURE 63).

Variation. Male (n=2): Total length 8.0‒8.56; carapace 3.72‒4.4 long, 2.64‒3.2 wide; femur I 3.52‒4.48. Female (n=6): Total length 10.72‒15.6; carapace 4.84‒5.92 long, 3.04‒3.6; femur I 3.16‒3.88.

Distribution. South of Chile ( Fig. 70View FIGURE 70).

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Segestriidae

Genus

Ariadna

Loc

Ariadna lalen

Giroti, André Marsola & Brescovit, Antonio Domingos 2018
2018
Loc

Ariadna araucana

Grismado 2008
2008