Ancylometes hewitsoni (Pickard-Cambridge)

Höfer, H. & Brescovit, A. D., 2000, A revision of the Neotropical spider genus Ancylometes Bertkau (Araneae: Pisauridae), Insect Systematics & Evolution 31, pp. 323-360 : 347-359

Ancylometes hewitsoni (Pickard-Cambridge)

(Fig. 18-22, 44-46, 63)

Lycoctenus hewitsoni Pickard-Cambridge, 1897: 100, pl. 4, fig. i, b (male and immature female syntypes from Largo, near Santarém, Pará, Brazil, in BMNH 12.13.76, examined). Male lectotype and immature female paralectotype are herein designated.

Ancylometes hewitsoni: Petrunkevitch 1911: 540; Roewer 1954: 145; Bonnet 1955: 318.

Diagnosis. - Male. Filiform end of embolus broadened with bifid apex, not totally embedded in short conductor. Conductor not wing-shaped, but erecting straight behind large membranous lobe (Fig. 18, 44). On base of embolus small but distinct and pointed bulge (Fig. 19, 44). Median apophysis very large in relation to conductor, with broad apex (Fig. 44). Female epigynal median plate narrow trapezoidal with narrow protuberance, lateral plates broad (Fig. 21, 45).

Description. - Male (MZSP 11946). Prosoma light brown with broad marginal white bands, chelicerae white at base. Abdomen light brown with two pairs of muscle points, ventrally lighter. Legs brown. Male palpal tibia with rounded median apophysis and sharp lateral apophysis. Embolus broad and bifid at apex, basal membranous lobe large and rounded, covering whole base of embolus. Conductor straight, erect behind lobe. Median apophysis large with broad apex (Fig. 44). Chelicerae with 3 promarginal and 4 rctromarginal teeth.

Measurements. Total length 17.5. Prosoma 9.5 long, 8.0 wide. Clypeus 0.5. Eye diameters and interdistances: AME 0.45, ALE 0.25, PME 0.5, PLE 0.45; AME-AME 0.2, AME-ALE 0.4, PME-PME0.2, PME-PLE 0.4, AME-PLE 0.9, AME-PME0.25, MOQ length 1.15, front width 1.05, back width 1.2.

Legs. I-femur 9.8/ patella 4.6/ tibia 9.4/ metatarsus not complete/ tarsus not present; II- 9.5/ 4.3/ 8.2/ 8.5/ 4.5/ 36.0; III- 8.2/ 3.7/ 7.2/ 7.7/ 4.3/ 33.0; IV- 10.3/ 4.5/ 9.5/ 12.5/ 5.3/ 43.0. Cymbium 3.0 long, 1.6 wide, median apophysis 0.95 long.

Leg spination: femora I p1-1-1, r1-1-1, d1-1-1; II p1-1-1-1, r1-1-1-1, d1-1-1; III p1-1-1, r1-1-1-1, d1-1-1; IV p1-1-1, r1-1-1, d1-1-1; patellae I-IV p1, r1; tibiae I-II v2 -2-2-2, p1-1, r1-1-1, d1-1-1; III-IV v2 -2-2, p1-1, r1-1, d1-1-1; metatarsi I-II v2 -2-1, p1-1-1, r1-1-1; III v2 -2-2, p1-1-1, r1-1-1, d1-1-1-2; IV v2 -1-1-1-1-2, p1-1-1-1, r1-1-1-1, d1- 1-1-2; tarsi III-IV v5 -9. Palpal femora p1, r1, d1- 1-2; patellae p1, tibiae p1-1, r1, tarsi p1, r1.

Female (CBF). Coloration as in male. Chelicerae with 3 promarginal and 4 retromarginal teeth. Median plate of epigyne narrow trapezoidal, prominent, with narrow prominent protuberance, lateral plates broad (Fig. 21,45). Copulatory ducts straight, entering spermathecae ventrally, fertilization ducts directing laterally (Fig. 46).

Measurements. Total length 22.0. Prosoma 9.4 long, 8.0 wide. Clypeus 0.7. Eye diameters and interdistances: AME 0.4, ALE 0.25, PME 0.5, PLE 0.45; AME-AME 0.25, AME-ALE 0.45, PME-PME 0.3, PME-PLE 0.5, AME-PLE 1.0, AME-PME 0.3, MOQ length 1.15, front width 1.1, back width 1.2. Epigyne: Median plate 1.0 long, 0.35 wide.

Legs. I-femur 7.7/ patella 4.3/ tibia 6.6/ metatarsus 5.5/ tarsus 3.5/ total 28.0; II- 7.5/ 4.0/ 6.0/ 5.7/ 3.1/ 27.0; III- 7.0/ 3.4/ 5.4/ 6.0/ 3.1/ 25.0; IV- 8.5/ 3.6/ 7.5/ 9.2/ 3.8/ 33.0.

Leg spination: femora I-II p1-1, d1-1-1; III p1- 1-1-1, r1-1-1-1, d1-1-1; IV p1-1-(1)-1, r(1)-1, d1- 1-1; patellae III-IV p1, r1; tibiae I v2 -2-2-2; II v2 - 2-2-2, p1-1; III-IV v2 -2-2, p1-1, r1-1, d(1)-(1)-1; metatarsi I v2 -2, p1, r1; II v2 -2-1, p1, r1; III v2 -2- 2, p1-1-1, r1-1-1, d(1)-1-1-2; IV v1 -1-1-1-1-1-2, p1-1-1, r1-1-1-1, d1-1-1-2; tarsi III-IV v6 -9. Palpal femora p1, r1, d1-1-2; patellae p1; tibiae p1-1, r1, tarsi p2-1, r1.

Variation. See Table 9.

Coloration of living specimens. Prosoma of females dark brown, abdomen yellowish brown, lighter in front and with two pairs of brown spots on the dorsum. Clypeus at lateral edges and chelicerae on the front densely covered by white hairs. Lateral from PLE white spots twice the diameter of eyes, and flanges of prosoma with scattered white spots. Femora and somewhat weaker tibiae with lateral white bands of hairs, scattering out to dorsal side. Distal parts of legs more unregularly spotted by white hairs.

Material examined. - BOLIVIA: Beni: Prov. Ballivián, Espiritu, Curiche Florida, 1 [[female]], June 3 1990, W. Hanagarth & B. Müller-Allissat (CBF); 16.8 miles SW Yucumo, ca. 15°23'S 66°59'W, 500 m, 1 [[female]], Nov. 15 -19 1989, J. Coddington et al. (NMNH). BRAZIL: Amazonas: Rio Madeira, Lago Capitari, 1 [[male]], March 19 1967, H. Britski (MZSP 11946); Manaus, Ilha de Marchantaria ( várzea), 2 [[females]], Feb. 26 1987, H. Höfer (SMNK 315, 324); 1 [[male]], Sept. 29 1987, H. Höfer (INPA); 2 [[males]], (floating meadows), Feb. 18 1982, J. Adis (IBSP); 1 [[male]], March 3 1982, J. Adis (SMNK); 1 [[male]], Oct. 20 1981, J. Adis (INPA), 1 [[female]] with eggsac, March 16 1981, J. Adis (INPA); 1 [[female]], Oct. 20 1984 (IBSP); 2 [[females]]9 (one eggsac), Sept. 2 1981 (INPA); 1 [[female]], Feb. 18 1982 (INPA); 2 [[males]], same data (SMNK); Tarumã Mirím ( Igapó), H. Höfer, 1 [[female]], Aug. 1992 (SMNK 1451); 1 [[female]], Feb. 25 1987, H. Höfer (SMNK 1452); 1 [[female]], Oct. 7 1987, H. Höfer (SMNK); Pará: Santarém, 2 [[females]], Aug. 1977, W. Fernandes (IBSP 4802); Oriximiná, Lago Ururiá, 1 [[male]], 1 [[female]], Jan. 14 1968, EPA (MZSP 9744).

Distribution. - Amazonian (Fig. 63).