Agalenocosa pirity Piacentini, 2014, sp. nov.
Creators: name: Piacentini, Luis N.
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Lycosidae
Agalenocosa
Agalenocosa pirity

description: Agalenocosa pirity sp. nov.
(Figs 1 a, 8e, 20, 21, 24g, 27)
Type material. Male holotype from Argentina, Entre Ríos, Diamante, Parque Nacional Predelta, bañado al pie de bosque de barranca, S32.12154º W 60.62946º (GPS, area +/- 10m), elev. 4 m (GPS), 23–26.iii.2011, Rubio, G., Izquierdo, M. & Piacentini, L., hand collected in rushes (MACN-Ar 28786) and three female paratypes of the same data (MACN-Ar 28784).
Etymology. The specific name is a noun in apposition meaning rushes in the Guarani language referring to the habitat where the type specimens was collected (Fig. 1 c).
Other material examined. ARGENTINA. Santa Fe: Isla Santa Fe, Zanetic, A. & Goloboff, P. A., 15. viii.1981, 1 ♂ 4 ♀ (MACN-Ar 22708). Entre Ríos: Brazo Largo, Zanetic, A. & Goloboff, P. A., 12.vii. 1979, over a “serrucheta”, Eryngium sp. on the water, 1 ♀ (MACN-Ar 22745); same data, 1 ♀ (MACN-Ar 22752); Diamante, P. N. Predelta, bañado al pie de bosque de barranca, S32.12154º W 60.62946º (GPS, area +/- 10m), elev. 4m (GPS), 23–26.iii.2011, Rubio, G., Izquierdo, M. & Piacentini, L., hand collected in rushes, 1 ♂ (MACN-Ar 28787); same data, 1 ♂ (MACN-Ar 28788); same data, 3 ♂ 2 ♀ (MACN-Ar 28789); same data, 1 ♂ (MACN-Ar 28620); same data, 1 ♀ (MACN-Ar 28621); bañado en Laguna Las Piedras, 6 km S Diamante, S 32.12496° W 60.62878° (GPS, +- 150m), elev. 12m, 29.iv-1.v.2013, Ramírez, M.J., Piacentini, L.N., González, M.E., Laborda, A. & Aisen, S., collected on vegetation over the water, 1 ♂ (MACN-Ar 30648); same data, 4 ♂ 5 ♀ 2 immatures (MACN-Ar 30377); same data, 1 ♂ (MACN-Ar 30647); same data, 2 ♀ 1 immature (MACN-Ar 30649); same data, 1 ♂ 2 ♀ (MACN-Ar 30336); same data, 1 ♀ (MACN-Ar 30308); same data, 1 ♂ (MACN-Ar 30307); same data, 1 ♀ (MACN-Ar 30333); same data, 1 ♀ 1 eggsac (MACN-Ar 30646); same data, 1 ♂ (MACN-Ar 30645); Parque Nacional Predelta, bañado cerca de entrada, 6 km S Diamante, S32.12194° W 60.62996° (GPS, +- 20m), elev. 10m, 30.iv.2013, same collectors, 1 ♀ (MACN-Ar 30650); same data, 2 ♂ (MACN-Ar 30380); same data, collected in marshes, 5 ♀ 4 immature (MACN-Ar 30379). Buenos Aires: San Pedro, Vuelta de obligado, Olejnik, N. & López, N., 11. iv.2009, 1 ♂ (MACN-Ar 25720); same locality and collectors, 21. iii.2009, 1 ♀ (MACN-Ar 30640); Tigre, arroyo Espera, Galiano, M. E., iv.1983, en camalotes, 1 ♂ 1 immature (MACN-Ar 22720); same data, 1 ♀ 1 eggsac (MACN-Ar 22781); same data, 3 ♀ (MACN-Ar 22783); Tigre, Bachmann, A., 30. xi.1952, 1 ♀ (MACN-Ar 22746); Delta, Río Sarmiento, Oliva, A., over Pistia sp. and Sellenia sp. 1. iv.1983, 1 ♀ (MACN-Ar 22759); Delta, en una isla, Bachmann, A., iv.1977, 1 ♀ (MACN-Ar 22764); Delta, Estación experimental INTA, Bachmann, A., vii.1968, 1 ♀ (MACN-Ar 22772); same locality and collector, 20–28. i.1982, 1 ♀ 1 eggsac (MACN- Ar 22773); same locality and collector, 25. ii.1973, 2 ♀ 1 immature (MACN-Ar 22779); Campana, Reserva Natural Otamendi, Estación Río Luján, -34,277352º -58,88054º (WG84), elev. 5m, Ramírez, M. J., Grismado, C., Piacentini, L., Soto, E., González-Marquez, M. E., Guala, M., Andía Navarro, J. M., López, N., Ortega Insaurralde, I. & Zermoglio, P., 9.ix.2010, in marsh and grassland, 2 ♂ (MACN-Ar 28439); same data, 1 ♀ (MACN-Ar 28437); same data, 1 ♀ (MACN-Ar 28438); same data, 1 ♀ (MACN-Ar 28436); Playa Núñez, Castillo, F., viii.1936, 3 ♂ 1 immature (MACN-Ar 22714). Ciudad Autónoma de Buenos Aires: Reserva Ecológica Costanera Sur, S 34º35'47'' W 58º21'36,8'', Canal Viamonte, Turienzo, P., 13.x.2008, collected with pitfall traps, 1 ♀ (MACN-Ar 28472); same data, 2 ♀ (MACN-Ar 28447); same data, Mamani, A. & Turienzo, P., 10. xi.2008, 1 ♀ (MACN-Ar 28443); same data, 29. ix.2009, 1 ♀ (MACN-Ar 28474); same data 26. v.2008, 1 ♀ (MACN-Ar 28475); same data, Mamani, A., 27. x.2008, 1 ♀ (MACN-Ar 28442); same data, Mamani, A., 27. x.2008, 3 ♀ 1 immature (MACN-Ar 28473); same data, Mamani, A., 27.10.2008, 1 ♀ 2 immatures (MACN-Ar 28476); same data, Mamani, A. & Turienzo, P., 1. ix.2008, 1 ♀ (MACN-Ar 28477).
Diagnosis. This species can be differentiated from the other species of Agalenocosa by the combination of the large body size (TL 6.38 – 9.98), the presence of 0-2-0 ventral spines on the tibia I, whereas in the rest of the species has 2-0-0 or 2-2-0 and by the long setae covering almost all the body. Males resemble those of A. tricuspidata in the shape of the elements of the bulb, but can be differentiated by the shorter dorsal branch of the embolic division (Fig. 22 d).
Description. Male. Holotype (MACN-Ar 28786). Carapace light brown with pale brown median band and with a Y-shaped dark mark that extends from the fovea to the PLE, pale submarginal bands (as in Figs 21 d–f). Sternum yellow, sparsely covered with brown bristles, more abundant on the margins. Labium dark grey. Chelicerae lighter than labium, light brown, covered with brown bristles. Dorsum of abdomen brown with longitudinal irregular pale marks along the midline (as in Figs 21 d–f). Venter pale brown. Legs pale brown without annulations, densely covered with long setae. Leg formula IV> I> II> III.
Spination: femur I p 0-0-d1 d 1-1-1, II p 0-d1-d1 d 1-1-1 r 0-0-d1, III p d1-0-d1 d 1-1-1 r d1-0-d1, IV p d1- 0-d1 d 1-1-1 r 0-0-d1; patella II d 1-1 p 1, III p 1 d 1-1 r 1, IV p 1 d 1-1 r 1; tibia I v 0-2-0, II p d1-0-d 1 v 0-2-0, III p 0-d1-1 d 1-0-1 r 0-d1-d 1 v p1-2-2ap, IV p 0-d1-1 d 1-0-1 r 0-1-1 v 2-2 -2ap; metatarsus I v 2-2-2ap, II p d1- 0-2ap r 0-0- v1 ap v 2-2 -1ap, III p d1-1-2ap r d1-1-2ap v p1-2-1ap, IV p d1-d1-2ap r d1-d1-2ap v 2-2 -1ap.
Palp. Basal apophysis of the palpal tibia rounded, medium sized (as in Fig. 8 e). Tegulum with a shallow prolateral furrow (as in Figs 22 c–d). Subtegulum in the meso-prolateral part of the alveolus. Ventral branch of the median apophysis rounded, dorsal branch reduced to a transverse beak-like protuberance directed retrolaterally (as in Fig. 22 d). Terminal apophysis short, pointing retrolaterally (as in Fig. 22 d).
Female (MACN-Ar 28437). Colouration in ethanol as in male (Figs 21 a–c). Leg formula IV> I> II> III.
Spination: femur I p 0-0-d1 d 1-1-1, II p 0-d1-d1 d 1-1-1, III p d1-0-d1 d 1-1-1 r d1-0-d1, IV p d1-0-d1 d 1- 1-1 r 0-0-d1; patella I d 0-1, II d 1-1, III p 1 d 1-1 r 1, IV p 1 d 1-1 r 1; tibia I v 0-2-0 d 1-0-1, II p d1-0-d 1 v r1- r1-0, III p 0-d1-1 d 1-0-1 r 0-d1-d 1 v p1-p1-2ap, IV p 0-d1-1 d 1-0-1 r 0-1- 1 v p1-2-2ap; metatarsus I v 2-2-2ap, II p d1-0-2ap r 0-0- v1 ap v 2-2 -1ap, III p d1-1-2ap r d1-1-2ap v p1-2-1ap, IV p d1-d1-2ap r d1-d1-2ap v 2-2 -1ap.
Epigynal plate without pockets or atria, copulatory openings with the anterior part of the internal margin sclerotised and a lightly sclerotised area posteriorly (Fig. 22 a). Epigynal plate simple, rounded atria with the anterior margin sclerotised, copulatory opening located in the middle of the external margin (Fig. 22 a). Vulva: head of spermatheca broad, longer than the stalk. Vulval chambers rounded, behind to the base of spermathecae in dorsal view (Fig. 22 b).
Measurements. Female, MACN-Ar 28437 (male, Holotype): TL 9.04 (7.98), CL 3.93 (4.20), CW 3.07 (3.07), CH 1.20 (1.20), AL 4.33 (3.40). Eyes: AME 0.17 (0.17), ALE 0.10 (0.13), PME 0.27 (0.30), PLE 0.17 (0.23). Row of eyes: AER 0.73 (0.73), PME 0.75 (0.75), PLE 1.17 (1.08). Sternum (length/width) 2.13/1.67 (2.13/1.67). Labium (length/width) 0.65/0.75 (0.67/0.53). Legs: length of segments (femur + patella/tibia + metatarsus + tarsus = total length): I 3.07 + 3.73 + 2.40 + 1.13 = 10.33, II 2.67 + 3.27 + 2.27 + 1.07 = 9.28, III 2.67 + 3.00 + 2.33 + 1.07 = 9.07, IV 3.53 + 4.33 + 3.60 + 1.20 = 12.66, (I 3.00 + 4.00 + 2.33 + 1.27 = 10.60, II 2.73 + 3.40 + 2.53 + 1.07 = 9.73, III 2.67 + 3.20 + 2.53 + 1.07 = 9.47, IV 3.47 + 4.40 + 3.87 + 1.20 = 12.94).
Variation. Females (males) (range, mean ± s.d.): TL 7.05 – 9.98, 8.16 ± 1.00; CL 3.27 – 5.13, 3.93 ± 0.60; CW 2.40 – 3.93, 3.02 ± 0.47 n = 10 (TL 6.38 – 8.51, 7.79 ± 0.58; CL 3.40 – 4.67, 4.14 ± 0.39; CW 2.53 – 3.40, 3.11 ± 0.24 n = 10).
Distribution. Known only from eastern central Argentina (Santa Fe, Entre Ríos and Buenos Aires Provinces) (Fig. 27).
Natural history. This species was collected in a marsh, hidden at the base of reedmace (Typha angustifolia), in the Predelta National Park (Fig. 1 c) and in pitfall traps on the Costanera Sur Natural reservation.
description: Published as part of Piacentini, Luis N., 2014, A taxonomic review of the wolf spider genus Agalenocosa Mello-Leitão (Araneae, Lycosidae), pp. 1-35 in Zootaxa 3790 (1) on pages 26-28, DOI: 10.11646/zootaxa.3790.1.1, http://zenodo.org/record/285885