Scotinoecus cinereopilosus ( Simon, 1889 )

T, Duniesky Rios & Goloboff, Pablo A., 2012, New species of Chilean Hexathelidae (Araneae, Mygalomorphae), Zootaxa 3422, pp. 32-51 : 34-38

Scotinoecus cinereopilosus ( Simon, 1889)

Figs 1–2 ; 7–13; 16–18

Hexathele cinereo –pilosa Simon, 1889: 222 (DƤ).

Scotinoecus cinereopilosus: Simon, 1892: 188 (new comb.); Schiapelli & Gerschman, 1968: 318, figs 9–12 (Ƥ); Calderón, 1973: 238, figs 1–7 (part, Ƥ only); Gertsch & Platnick, 1979: 7, figs 27–28; Legendre & Calderón, 1984: 1056, pl. XIX, figs 1–18 (part, Ƥ only).

Diagnosis. S. cinereopilosus can be distinguished from the other species of the genus by its smaller size. Females can be distinguished by the shorter and thicker leg I, sternum with a dark marginal band, and smaller ALS with only 1–2 spigots. Males can be distinguished from those of S. major and S. fasciatus by the curved embolus tip; the conductor is longer and wider than in S. major (reaching almost the tip of the embolus), and thinner than in S. fasciatus ; it has fewer spines on the tibiae and metatarsi I, more spines on metatarsi IV, and (unlike S. major ) only 2 R and 1 P on tarsi IV.

Female. Total length 10.56. Cephalothorax length 3.60, width 2.64; cephalic region, length 2.40, width 2.04 mm; ALE larger than rest, both eye rows recurved, with 6 and 2 setae in front of, and behind, eye tubercle. Cephalothorax with mid-dorsal line of setae reaching fovea, in front of which they are thicker. Chelicerae large, with many dark antero-dorsal hairs, with 8 large promarginal teeth and 30 denticles towards middle–basal region of furrow, retromargin with long reddish hairs. Labium length 0.36, width 0.88, with 96 cuspules and 13 elongate setae on superior region. Palpal coxae with 91 cuspules. Sternum rounded, length 2.36, width 1.92, with dark marginal band along entire edge, with 3 pairs of sigilla. Leg formula 4123. Opisthosoma long, 5.52, brown with lighter mottling forming transverse lines not reaching middle. Spinnerets long, PLS with basal: medial: apical article of lengths 1.12: 0.08: 1.04, PMS length 0.64, ALS with two articles, basal length 0.24, distal article very small and digitiform, with two spigots, length 0.08. Chaetotaxy: Femora: I–IV and palp with mid-dorsal line of attenuated setae, apical longest; III, 1 p m. Patellae: I, 0; II, 1 p a; III, 1–1–1 P, 1 R M, with many small thick setae; IV, 1 R M, with many small thick setae; palp, 0. Tibiae: I, 1 P M, 2 VA ANT, 1–1– 1 V POST; II, 1 P M, 1–1– 2 V ANT, 1–1– 2 V POST; III, 0–1–1–0 R, 0–1–1–0 P, 1–2– 2 V ANT; 1–1– 1 V POST, with many small thick setae; IV, 0–1–1–0 P, 0–1–1–0 R, 1–2– 2 V ANT, 1–1– 1 V POST; palp, 1 P M, 1–0–1– 2 V ANT, 1–1–0– 2 V POST. Metatarsi: I, 0–1– 1 V ANT, 1 V A, 1–1–0– 1 V POST, 1–0–0– 1 V, with 2 apical preening combs (of 2 bristles); II, 1–1– 1 V ANT, 1 V A, 1–1– 1 V POST, 0–1–0–1 P, with 3 apical preening combs (of 2–2–4 bristles); III, 1–1–1–1 P, 0–1–1–0 D, 1–1–1– 1 V ANT, 1 V A, 1–1–0– 1 V POST, with 3 apical preening combs (anterior of 4 or 5 bristles, middle and posterior of 3); IV, 0–1–1–1 P, 1–1–1–1– 1 V ANT, 1–0–1–0– 1 V POST, 0–1–0–1 D, with 3 apical preening combs (of 5–3–2 bristles). Tarsi: I, 1 V ANT INF; II, 1 P INF, 1 R INF; III, 0–1–1 P, 0–1–1 R; IV, 1–1–1–0 P, 0–1–1–1 R; palp, 1–1– 1–1 P, 1–0–1–1 R, 1 V M. Trichobothria: Tarsi I, with 5, II–VI, with 6; metatarsi I–III with 9, IV with 12; tibiae with two rows of 6.

Male. Total body length 7.80, cephalothorax length 3.36, width 2.76, cephalic region length 2.16, width 2.28; ALE larger than rest; both eye rows recurved; with 7 and 3 setae in front of, and behind, eye tubercle. Chelicerae with 8 large promarginal teeth, and 12–16 denticles towards base of furrow, retromargin with abundant reddish hairs. Labium length 0.28, width 0.68, with 83 cuspules, and 12 elongate setae on superior region. Palpal coxae with 70 cuspules. Sternum length 1.92, width 1.80, with marginal band as in female. Opisthosoma length 3.60, colored as in female. Spinnerets long, with basal: medial: apical articles of PLS of lengths 0.88: 0.48: 0.72; PMS length 0.44; ALS biarticulate, with basal and apical articles of lengths 0.20 and 0.04. C haetotaxy: Femora: I–IV with a series of 5–7 mid-dorsal line of attenuated setae. I, 1 p ant; II, 1–0–0–1 p; III, 2 p, 1–1–1 r; IV, 1 r, 1 p; palp, 1–1–1–1 d ant, long (anterior longest). Patellae: I, 1 d a (thick); II, 1 p a; III, 1–1–2 P, 1–1–0 R; IV, 1 R M, 1 r b; palp, 5 setae along margin, central ones longest. Tibiae: I, thickened, with 1–1– 1 V, 1 V ANT (very thick), 0–1–1– 0 P, 1 p b (thick); II, 0–1–1–0 P, 1–1– 2 V ANT, 1–1– 1 V POST; III, 0–1– 1 V ANT, 1–1– 1 V, 1–1– 1 V POST, 1–1– 1 R, 0–1–1 P, 2 d b; IV, 0–1–1–0 P, 0–0–1–1 R, 1–1– 1 V ANT, 1–1– 1 V, 1–1– 1 V POST; palp, about 50 long setae on margin of furrow where bulb rests, 2–3 d (elongate and curved). Metatarsi: I, 0–1–2– 1 V ANT, 0–1–0– 1 V POST, with 3 preening combs (of 2–3–3 bristles) separated by apical spines; II, 1–1–1– 1 V ANT, 1–1–1– 1 V POST, 0–0–1–1 P, 1 V A, with 3 preening combs (of 3–2–3 bristles), separated by apical spines; III, 1 D ANT, 1– 1–0–1–1 R, 1–1–1–1–0 P, 0–1–1–1– 1 V ANT, 1–1–0–0– 1 V, 1–1–0–1– 1 V POST, with 3 preening combs (of 4–3– 4 bristles), separated by apical spines; IV, 1–1–1–0 R, 0–0–1–2 D, 1–1–1–0 P, 1–1–1–1– 1 V ANT, 0–1–0–0– 1 V, 1–1–0–1– 1 V POST, with 3 preening combs (of 4–3–2 bristles). Tarsi: I,0; II, 1 P INF, 1 R INF; III, 0–0–1–1 R INF, 0–0–1–1 P INF; IV, 0–0–1–1 R, 0–0–0–1 P; palp, 0. Trichobothria: Tarsi 5; metatarsi I–III 8, IV 10; tibiae I– III with two rows of 5, IV with two rows of 9.

Distribution and habitat. Found in the southern-central region of the country, provinces of Arauco, Valdivia, Malleco, Cautín , and BioBio. The specimens collected built small webs under logs or rocks, in the forest.

Other specimens examined. Chile. Región VIII (Bio–Bio): Arauco: Monumento Natural “Contulmo” [38° 1'37"S 73°12'10"W], 11–12 Feb 1992 (P. Goloboff – N. Platnick – M. Ramírez) 13 Ƥ ( MACN), 1 juv. Sur de Contulmo, 14 Feb 1992 (M. Ramírez – N. Platnick – P. Goloboff) 1 Ƥ ( MACN), 1 juv. Bio–Bio: Alto Caledonia. 42 km. E. Mulchen, 470 m [37°46'53"S 71°45'39"W], 14 Feb 1992. (P. Goloboff – N. Platnick – M. Ramírez) 9 Ƥ ( MACN) 2 Ƥ ( AMHN), 1 juv. Región IX (de la Araucania): Malleco : 16 km, de Curacautin (between Curacautin and Tolhuaca) [38°23'55"S 71°42'44"W], 15 Feb 1992 (P. Goloboff – N. Platnick – M. Ramírez) 1 Ƥ. Cautín: Parque Nacional “Conguillio” [38° 30ʹ 0ʺ S 71° 30ʹ 0ʺ W], 23 Feb 1992. (M. Ramírez – N. Platnick – P. Goloboff) 2 33 ( MACN) 1 3 ( AMNH), 13 Ƥ ( MACN) 2 Ƥ ( AMNH), 1 juv. Región X (de los Lagos ): Valdivia : 6 km E. Niebla [39°53'13"S 73°19'42"W], 16 Feb 1992 (P. Goloboff – N. Platnick – M. Ramírez), 2 Ƥ ( MACN).

Figures

FIGURES 1 – 6. Female Scotinoecus. Sternum and maxillae, and spinnerets. 1 – 2. S. cinereopilosus. 3 – 4. S. ruiles sp. nov. 5 – 6. S. major sp. nov.