Lobizon minor Mello-Leitao 1941, comb. nov.
Creators: name: Piacentini, Luis N.
name: Grismado, Cristian J.
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Lycosidae
Lobizon
Lobizon minor

description: Lobizon minor (Mello-Leitão, 1941) comb. nov.
(Figs 45–48, 84)
Other material examined. ARGENTINA: Salta: XI.1939, no collector, no precise locality, 1 female (MACN –Ar 16306); X.1965 collector illegible, 1 female (MACN-Ar 16304). Tucumán: Tafí del Valle, ca. 26°52’S, 65°42’W, 11.I.1985, Szumik C. & Goloboff P., 1 female (MACN-Ar 16296). Mendoza: Cachenza (Cacheuta?), ca. 32°57’S, 68°49’W, X.1965, Maury E., 1 female (MACN-Ar 16293). San Luis: Cortaderas, ca. 33°17’S, 66°18’W, 10.XII.1982, Roig A., 3 females (MACN-Ar 16295). Formosa: Guaymala, Riacho Pilagá, ca. 26°01’S, 58°43’W, IX.1948, no collector, 1 female (MACN-Ar 16323). Chaco: Dpto. Guemes: El Pintado, ca. 24°38’S, 61°27’W, 1.X.1959, Bachmann A. (MACN-Ar 5441). Misiones: Parque Nacional Iguazú, ca. 25°51’S, 54°21’W, 8.XII.1995, Ramírez M., 1 female (MACN-Ar 16291). Córdoba: Huerta Grande, ca. 31°04’S, 64°30’W, 22.X.2003, Rodriguz Gil S. & Chemisquy A. (MACN-Ar 16292); Calamuchita, ca. 31°29'S, 64°13'W, I.1955, Viana J., 1 female (MACN-Ar 16297). Entre Ríos: Ibicuycito, ca. 33°50’S, 58°53’W, IV.1959, Castillo F., 1 female (MACN-Ar 16301). Buenos Aires: Estancia El Tonelero, Partido Gral. Lavalle, near canal 2, ca. 36°24’S, 56°58’W, 15–21.XII.1951, Cranwell J., 1 female (MACN-Ar 16298); Otamendi, ca. 34°13’S, 58°54’W, 18.III.1997, Fuentes B., 1 female (MACN-Ar 16299); Mar del Plata, ca. 37°59’S, 57°35’W, X.2008, Sander V., 1 female (MACN-Ar 16302); Glew, ca. 34°53’S, 58°23’W, 1970, Carpintero (MACN-Ar 16300); Caseros, ca. 34°36'S, 58°33'W, 3.XII.1946, Partridge W., 2 females, 1 immature (MACN-Ar 16303), same locality and collector, 6.XII.1946, 1 female (MACN-Ar 16305).
Diagnosis. Females of L. minor are very similar to those of L. ojangureni sp. nov. by the shape of the epigyne, with a conspicuous lip projecting ventrally and posteriorly and with rounded furrows on the copulatory openings, but differ by the short copulatory ducts, the usually very large spermathecal heads and by the more rounded and thicker lip margin (Figs 47, 48). Male: Unknown.
Description. Female (MACN-Ar 16292). Dorsal shield of prosoma brown with grey radial pattern, light brown median band narrowing posteriorly and pale submarginal bands. Dorsal shield of prosoma covered with short brown setae, median band with few long black bristles from the fovea to the PLE, four long black bristles on the clypeal condyle anteriorly of AER. Sternum yellow, sparsely covered with brown bristles, more abundant on the margins. Labium dark grey. Chelicerae darker than labium, reddish-brown and covered with brown bristles.
Dorsum of opisthosoma with the same colours and pattern as in L. corondaensis; venter yellow with some dusk patches; spinnerets yellow. Legs brown with dark annulations. Leg formula IV> I> III> II. Spination of leg I, femur: three dorsal, one apico-prolateral; tibia: two ventral pairs, one apico-ventral spine and one prolateral; metatarsus: three ventral pairs, and one apico-ventral spine. Epigyne: with rounded furrows divided by a short longitudinal septum and conspicuous lip projecting ventrally and posteriorly; in dorsal view the heads of spermathecae are large, with a short stalk; the copulatory ducts run ectally to the spermathecae; vulval chambers smaller than the spermathecae.
Male. Unknown.
Measurements. Female, MACN-Ar 16292: TL 5.73. PL 2.93, PW 2.00, PH 1.20, OL 2.80. Eyes: AME 0.10, ALE 0.07, PME 0.29, PLE 0.22. Row of eyes: AM 0.59, PME 0.71, PLE 0.88. Sternum (length/width) 1.30/1.07. Labium (length/width) 0.40/0.33. Legs: length of segments (femur + patella/tibia + metatarsus + tarsus = total length): Pedipalp 0.80 + 1.00 + - + 0.97 = 2.77, I 1.77 + 2.37 + 1.33 + 0.80 = 6.27, II 1.67 + 2.10 + 1.27 + 0.83 = 5.87, III 1.67 + 2.07 + 1.47 + 0.80 = 6.01, IV 2.13 + 2.87 + 1.22 + 1.07 = 7.29.
Variation. Females (range, mean± s.d.): TL 4.14 – 5.96, 4.98±0.53; PL 2.73 – 2.93, 2.65±0.22; PW 1.67 – 2.13, 1.88±0.14; n = 9. The specimens from the dry central areas of Argentina (as the holotype, Fig. 48) have large spermathecal heads, much larger than the vulval chambers, but the specimens from wet areas (Buenos Aires, Misiones and Entre Ríos) have smaller spermathecal heads, almost equal to the vulval chambers. These differences may indicate that there are two species involved, but given the high variability found in other species of the genus, we prefer to postpone their formal recognition until the corresponding males are found.
Distribution. This species shows a wide range and occurs in almost all the North-Central Provinces of Argentina (Salta, La Rioja, Tucumán, Misiones, Formosa, Chaco, Entre Rios, Córdoba, San Luis, Mendoza and Buenos Aires) (Fig. 84).
description: Published as part of Piacentini, Luis N. & Grismado, Cristian J., 2009, Lobizon and Navira, two new genera of wolf spiders from Argentina (Araneae: Lycosidae), pp. 1-33 in Zootaxa 2195 on pages 12-13, DOI: 10.5281/zenodo.189469