Navira naguan sp. nov.

(Figs 13–14, 69–78, 80, 82, 86)

Type material. Male holotype from Argentina, San Luis Province, Merlo, ca. 32°09’S, 65°31’W, 22.XI.1983, M. E. Galiano coll. (MACN-Ar 16281), and two female paratypes from the same locality, 12.XI.1982, A. Roig coll. (MACN-Ar 16280).

Other material examined. ARGENTINA: San Luis: Villa Elena, ca. 33°17’S, 66°18’W, 12.XI.1982, Maury E., 2 females (MACN-Ar 16285). Córdoba: Agua de Oro, ca. 31°26'S, 64°09'W, 1940, De Carlo J. A., 1 female (MACN-Ar 1088); Bosque Alegre, ca. 31°28'S, 64°12'W, 20 km Carlos Paz, I.1981, Grosso, Zanetic A. & Goloboff P.A., 4 females (MACN-Ar 16282); Copina, ca. 31°34'S, 64°40'W, XII.1983, Ferradás B. R., 2 females (MACN-Ar 16289); Calamuchita, ca. 31°29’S, 64°13’W, I.1945, Viana M., 1 female (MACN-Ar 4932); 17 km W Villa Icho Cruz, ca. 31°28'S, 64°32'W, 6.II.1981, Roig A., 1 female (MACN-Ar 16287). WITHOUT LOCALITY: 3.I.1946, illegible collector, 1 male (MACN-Ar 16290); 1 female (MACN-Ar 16283); 09.X.1964, illegible collector, 1 male (MACN-Ar 16286).

Diagnosis. As per genus.

Description. Male (holotype). Dorsal shield of prosoma brown, as in genus description. Sternum yellow; with a few black bristles. Labium dark grey. Chelicerae darker than labium, reddish-brown, covered with brown bristles; three promarginal teeth, the median largest; three retromarginal teeth, similar in size. Opisthosoma with the typical pattern of the genus in dorsal view; venter yellow (Fig. 72).

Colouration of legs: femur yellow in apically, remaining articles of the leg brown without annulations. Leg formula IV> I> III> II. Spination of leg I: femur, two dorsal; tibia, four ventral pairs, metatarsus with three ventral pairs, and one apico-dorsal. Palp as for genus.

Female (paratype). Colouration and setae as in male. Leg formula IV> I> III> II; spination of leg I: femur, two dorsal and one prolateral apical spines; tibia, four ventral pairs; metatarsus, three ventral pairs, and one apico-dorsal. Genitalia as for genus.

Measurements. Female, paratype (male, holotype): TL 5.16 (4.87), PL 2.83 (2.70), PW 2.00 (2.00), PH 0.93 (0.90), OL 2.33 (2.17). Eyes: AME 0.07 (0.07), ALE 0.07 (0.07), PME 0.28 (0.28), PLE 0.21 (0.21). Row of eyes: AM 0.50 (0.50), PME 0.67 (0.69), PLE 0.86 (0.86). Sternum (length/width) 1.30/1.07 (1.23/ 1.07). Labium (length/width) 0.39/0.40 (0.34/0.360). Legs: length of segments (femur + patella/tibia + metatarsus + tarsus = total length): Pedipalp 1.00 + 0.93 + - + 0.77 = 2.70, I 1.80 + 2.30 + 1.30 + 0.73 = 6.13, II 1.67 + 2.13 + 1.30 + 0.77 = 5.87, III 1.67 + 1.80 + 1.50 + 0.77 = 5.74, IV 2.17 + 3.80 + 2.33 + 0.97 = 9.27 (pedipalp 1.00 + 0.93 + - + 0.73 = 2.13, I 1.80 + 2.37 + 1.40 + 0.77 = 6.34, II 1.67 + 2.13 + 1.40 + 0.77 = 5.97, III 1.57 + 1.87 + 1.47 + 0.77 = 5.68, IV 2.13 + 2.60 + 2.37 + 0.97 = 8.07).

Variation. Female (male) (range, mean ±s.d.): TL 4.47 – 5.93, 5.01±0.42; CL 2.40 - 2.83, 2.64±0.17; CW 1.67 – 2.10, 1.90±0.16; n = 10 (TL 4.40 – 5.24, 4.71±0.28; CL 2.37 – 2.70, 2.58±0.11; CW 1.77 – 2.97, 2.18±0.51; n = 10).

Etymology. The specific epithet is a noun in aposition taken from the word " naguan ", also meaning “cacique” (tribal leader) but in the language of the Kamiare people (southern Comechingones).

Distribution. Argentina, Córdoba and San Luis Provinces (Fig. 86).

Natural history. Unknown.