Philisca ingens Berland

Soto, Eduardo M. & Ramírez, Martín J., 2012, Revision and phylogenetic analysis of the spider genus Philisca Simon (Araneae: Anyphaenidae, Amaurobioidinae) 3443, Zootaxa 3443 (1), pp. 1-65 : 19-20

Philisca ingens Berland

Figs 10–12 , 34g

Philisca ingens Berland, 1924: 436 (female holotype, from Chile, Juan Fernandez Archipelago, Más a Tierra, 22.VIII.1917, K. Bäckström coll., in NRS, S.P.E. 817, and female paratype in MHNP, examined). Ramírez 2003: 178.

Diagnosis: Philisca ingens has a huge size compared to other Philisca species ( Figs 10 , 11 ), with a carapace longer than 6mm. The other large species of the genus, P. doilu , has a distinct notch on the posterior margin of the carapace ( Fig. 7b ). Males are further distinguished by the very small copulatory bulb, widely separated from the tibia ( Fig. 12b ).

Description. Female (from Chile, Juan Fernandez Islands, Más a Tierra, Valle Anson, Plazoleta de Yunque, 200–250m Camote side, 1–28.IV.1962, B. Malkin, in AMNH): Total length 12.77. Prosoma length 6.65, width 4.79, wider between legs II–III. Tibia/metatarsus length: I, 5.13/4.67; II, 4.33/4.13; III, 3.27/3.60; IV, 4.53/5.20. Chelicerae with three teeth on promargin (middle tooth larger), three on retromargin. Sternum length 3.20, width 2.47. Spines: leg I, femur d 1–1–1, p d2ap or d1ap; tibia v 2–p1–2; metatarsus v 2bas. II, femur d 1–1–1, p d2ap; tibia v 2–2–r1–2; metatarsus v 2bas. III, femur d 1–1–1, p and r d1ap; patella r d1; tibia v 2–2–2, p d1–1, r 1–1 or 1–0; metatarsus v 2–2–2, d 2ap, p d1–1–1 and r d1–1–1 or d1–0–1. IV, femur d 1–1–1, p and r d1ap; patella r d1; tibia v 2–2–2, p d1–1 and r d1–d1–1; metatarsus v 2–2–2, d 0–p1–2 or 1–p1–2, p and r d1–1–1. Color in ethanol as male, see below ( Fig. 6d ). Opisthosoma length 5.32, epigastrium–spiracle 2.40, spiracle–spinnerets 0.80. Epigyne large, not much translucent ( Fig. 6e, f ), ventrally a single plate with anterior notch, LL separated in dorsal view. MF smooth, heart-shaped, close to the epigastric furrow. Anterior pouch wide, with short lumen. Ducts of AB long. Spermathecae large ( Fig. 6f ). The holotype presented the following differences in spines: II, femur p d1ap; tibia v 2–2–2, p 0–1; metatarsus v p1–0. III, tibia d r1–0–1–0; metatarsus d 0–p1–2.

Male (MACN-Ar 27955): Total length 12.90. Prosoma length 6.38, width 4.66. Length of tibia/metatarsus: I, 6.65/6.38; II, 5.99/5.85; III, 4.79/3.46; IV, 5.99/6.38. Chelicerae have clear modifications ( Fig. 34g ) with three teeth (middle tooth larger) on promargin, three on retromargin. Endites with protuberance at each external angle. Sternum length 3.00, width 2.33. Spines: leg I, femur d 1–1–1, p d2ap; tibia v 2–2–2; metatarsus v 2bas. II, femur d 1–1–1, p d1ap; tibia v 2–2–2; metatarsus v 2bas, p 1–0. III, femur d 1–1–1, p and r d1ap; patella r d1; tibia v 2– 2–2, p d1–1, r d1–1–1; metatarsus v 2–2–2, d 0–p1–2, p and r d1–1–1. IV, femur d 1–1–1, p and r d1ap; patella r d1; tibia v 2–2–2, p d1–1, r d1–d1–0–1; metatarsus v 2–2–2, d 0–p1–2, p and r d1–1–1. Opisthosoma length 6.12, spiracle–epigastrium 3.13, spiracle–spinnerets 1.00. Color in ethanol ( Fig. 11 ): Prosoma, chelicerae and mouthparts reddish brown, darker in front. Sternum and legs reddish–yellow, speckled black on the underside and at the base of some spines. Abdomen yellow, reddish speckled in black. Tibia width/length 0.17. Embolus thin, cylindrical, base of embolus with anterior longitudinal projecting ridge. MA long, flattened, without branches, thinner on its ventral margin ( Fig. 12h ). PMA long, wide, triangular, pPMA simple. Sclerotized triangular area present from the sperm duct to the base of MA. Conductor conspicuous, with canal weakly developed, ending in peak, on rounded projection, directed backwards ( Fig. 12 ).

Variability: Spines in males: I, tibia p 0–1. II, tibia p 0–1. IV, femur p and r d2ap; metatarsus v 2–p1–2. Spines in female: I, tibia v 2–2–2. II, femur p d2ap; tibia p 0–1.

Distribution: Known only from the Juan Fernandez Archipelago, Isla Robinson Crusoe, Chile.

Other material examined: CHILE: Región V (Valparaíso): Archip. Juan Fernández, Is. Robinson Crusoe, área de Plazoleta El Yunque, S33.65276º W78.84403º (GPS, trayecto +- 25m), elev. 299m (barómetro), 16– 20.II.2011, bosque de luma, M. Ramírez, E. Soto, J. Pizarro , 1 male ( MACN-Ar 27955 ) , 1 female and 2 immatures ( MACN-Ar 27954 ) , 1 female ( MACN-Ar 28032 ) ; El Yunque square, 200–500m Camote side, 1–28.IV.1962, 1 female and 1 immature, B. Malkin ( AMNH; temporary preparations, female: EMS-00121, EMS-00145) ; sendero al Mirador Selkirk, S33.63803° W78.84838° (GPS, +- 10m), elev. 367m (barómetro), 18.II.2011, ambiente alterado, maqui y mora, M. Ramírez, E. Soto, J. Pizarro, 1 male ( MACN-Ar 27956 ) ; Sector Salsipuedes, S33.63087° W78.84386° (GPS, área +- 100m), elev. 482m (barómetro), 21.II.2011, bosque de canelo, maqui y luma, M. Ramírez, E. Soto, J. Pizarro , 3 immatures ( MACN-Ar 28391 ) .

Figures

FIGURE 6. Female of Philisca doilu Ramírez (MACN-Ar 26762). (a female dorsal habitus; b epigyne, ventral view; c cleared epigyne, dorsal view). (AB: accessory bulbs, CD: copulatory ducts, MF: median field, S: spermathecae).

FIGURE 7. Philisca doilu Ramírez (MACN-Ar 15097). a–d male (a dorsal habitus; b prosoma, dorsal view; c ventral habitus; d prosoma, ventral view).

FIGURE 10. Female Philisca ingens Berland (EMS-00121, EMS-00145). a female dorsal habitus; b epigyne, ventral view; c cleared epigyne, dorsal view. (AB: accessory bulbs, CD: copulatory ducts, MF: median field, S: spermathecae).

FIGURE 11. Philisca ingens Berland (MACN-Ar 27955). a–d male (a dorsal habitus; b prosoma, dorsal view; c ventral habitus; d prosoma, ventral view).

FIGURE 12. Philisca ingens Berland (MACN-Ar 27955). Male, a–c left palp (a prolateral view, b ventral view, c retrolateral view); d–h copulatory bulb (d prolateral view, e ventral view, f retrolateral view, g apical view, h apical–retrolateral detail view). (C: conductor, E: embolus, MA: median apophysis, PMA: paramedian apophysis).

FIGURE 34. Male chelicerae of Philisca species, anterior view. a P. hahni Simon (EMS-00123). b P. tripunctata Nicolet (MACN-Ar 26812). c P. amoena Simon (MACN-Ar 14805). d P.hyadesi Simon (MACN-Ar 3682). e P. doilu Ramírez (MACN- Ar 15097). f P. huapi Ramírez (MACN-Ar 14819). g P.ingensBerland (MACN-Ar 27955). h P.ornata Berland (EMS-00104).