Ariadna lalen, Giroti & Brescovit, 2018

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

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

publication LSID

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

DOI

https://doi.org/10.5281/zenodo.5987919

persistent identifier

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

treatment provided by

Plazi

scientific name

Ariadna lalen
status

sp. nov.

Ariadna lalen View in CoL new species

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

Ariadna araucana View in CoL — 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, A GoogleMaps . 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‒B View 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‒D View 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. 62A View FIGURE 62 ). Endites brown; labium dark brown. Sternum brown with darker margins, and four pairs of fainted dark marginal areas ( Fig. 62B View FIGURE 62 ). Palps orange ( Fig. 63A‒B View FIGURE 63 ). Legs brownish orange, with pairs I‒II darker ( Fig. 62C‒E View FIGURE 62 ). Abdomen grey, lighter ventrally ( Fig. 62A‒B View 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. 62A View 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‒B View FIGURE 63 ); legs slender, densely coated with setae, and with macrosetae of similar sizes ( Fig. 62C‒E View 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‒E View 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. 62F View FIGURE 62 ). Endites brownish orange; labium dark brownish orange. Sternum brownish orange, with darker margins, and four pairs of fainted dark marginal areas ( Fig. 62G View FIGURE 62 ). Palps brownish orange, darkening gradually in distal direction ( Fig. 62G View 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‒I View FIGURE 62 ). Abdomen as in male ( Fig. 62F‒G View 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. 62F View 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‒I View 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‒I View 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‒D View 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. 70 View 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
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