Mediothele anae, T, Duniesky Rios & Goloboff, Pablo A., 2012

T, Duniesky Rios & Goloboff, Pablo A., 2012, New species of Chilean Hexathelidae (Araneae, Mygalomorphae), Zootaxa 3422, pp. 32-51 : 47

Mediothele anae sp. nov.

Figures 53–58

Type. Female Holotype (6812 MNHN) from Reserva Natural Los Ruiles [35°50'24"S 72°29'46"W], Cauquenes, Region VII, Chile. 25 Feb 1992 (P. Goloboff–N. Platnick–M. Ramírez).

Etymology. The specific name honors Ana Tamayo Espinosa, mother of the senior author.

Diagnosis. Females differs from those of M. australis and M. nahuelbuta by the more numerous spines on tarsi and metatarsi I and the smaller spermathecae with a more globose basal region. The cephalothorax of the female is wider and less elevated than in those of M. linares .

Female (Holotype). Total body length 10.80. Cephalothorax elongated, length 3.72, width 2.88. Cephalic region length 2.40, width 2.28. ALE larger than rest, anterior ocular row straight, posterior recurved. Fovea straight, dorsal midline of cephalothorax with series of 11 setae reaching fovea. Chelicerae with rastellum-like thick setae on anterior edge, with 7 large promarginal teeth and ca. 22 denticles irregularly placed in basal part of fang furrow. Palpal coxae with 6–7 cuspules. Labium length 0.32, width 0.76, with 2 cuspules. Sternum 2.04 long, 1.92 wide, with three pairs of sigilla. Opisthosoma length 4.80, light brown, with transverse bands forming chevron interrupted in middle. PLS with basal: medial: apical articles of lengths 0.72: 0.44: 0.52; PMS monoarticulate, length 0.56; ALS biarticulate, basal article 0.24 long, apical article very short, of length 0.12, with 5–6 spigots. Tarsi I length 0.8, width 0.28, metatarsi I 1.36 long. Chaetotaxy: Patellae and tibiae III–IV, and metatarsi III with many small spine-like setae around P edge to dorsal midline; such spines less numerous on metatarsi IV. All femora with 1–1–1–1–1–1 d; palp, 1 P A SUP, 1 P A INF. Patellae: I–II and IV, 0; III, 0–1–1–1 P SUP; palp, 1 P A. Tibiae: I, 1–1–1–1– 1 V POST; II, 0–1–0–1 P, 0–1–0– 1 V; III, 1 V ANT, 1–0–1 P SUP, 0–1–1 P INF, 1 D B, 0–1–1 R SUP; IV, 1–1– 1 V ANT; palp, 1–1– 2 V ANT, 1–1– 2 V POST. Metatarsi: I, 0–1/0–1– 1 V ANT, 0–1/1–0 V, 1–1–1–1–2 / 1–1– 1 V POST, with apical preening comb (of 2 bristles); II, 1 V ANT, 1–1–1–1– 1 V POST, with apical preening comb (of 3 bristles); III, 0–1–0–1 R SUP, 0–1–1–1 P, 0–0–1– 1 V ANT, 1 V A POST, with 3 apical preening combs (of 5–3–5 bristles); IV, 1–1–1 P SUP, 1–1–1– 1 V ANT, 1 V A POST, 0–1–0–1 R SUP, with 2 apical preening combs (of 6–4 bristles). Tarsi: I, 1–1–1–0 R INF; II, 1 P M INF; III–IV, 0; palp, 1–1–1–1–1 P INF, 0–1–1–1 R INF. Trichobothria: all tarsi with 5; metatarsi I–III with 6, IV with 8; all tibiae with two rows of 4.

Male. Unknown.

Distribution. Known only from the type locality.

Other specimens examined. Chile: Región VII (del Maule): Cauquenes: Reserva Natural Los Ruiles [35°50'24"S 72°29'46"W], 25 Feb 1992 (P. Goloboff – N. Platnick – M. Ramírez) 2 Ƥ, 1 juv ( MACN).

Figures

FIGURES 53 – 58. Mediothele anae sp. nov., female. 53 – 54. Right leg I, retrolateral and ventral views. 55. Sternum and maxillae. 56 – 57. Spinnerets. 58. Spermathecae.