Ancylometes amazonicus Simon

Höfer, H. & Brescovit, A. D., 2000, A revision of the Neotropical spider genus Ancylometes Bertkau (Araneae: Pisauridae), Insect Systematics & Evolution 31, pp. 323-360 : 345-359

Ancylometes amazonicus Simon

(Fig. 41-43, 63)

Ancylometes amazonicus Simon, 1898a: 17 (male holotype from São Paulo de Olivença, Amazonas, Brazil, de Mathan col., in MNHN no. 6834, examined); Simon 1898b: 299, fig. 304-305; Roewer 1954: 144; Bonnet 1955: 317.

Diagnosis. - A smaller species of the genus with very distinct genital characters: male palp with narrow cymbium, dorsally presenting a furrow and a retrolateral projection, median apophysis oblique and small in relation to conductor. Transparent membranous structure rectangular and longitudinally orientated. Embolus narrow from its base, conductor longer than wide, apically curved (Fig. 41). Female epigynal lateral plates strongly reduced and median plate enlarged, in contrast to all other species wider in its posterior half, invaginated anteriorly (Fig. 42). Copulatory ducts and spermathecae visible by transparency of median plate. Copulatory ducts strongly enlarged, entering spermathecae interior-laterally on dorsal side after describing a loop (Fig. 43).

Description. - Male (IBSP 12111). Coloration as typical for genus, except lateral sides of abdomen with irregular white bands. Cymbium of male palp clearly larger than wide, with dorsal retrolateral projection and dorsal furrow. Membranous lobe originating at base of embolus as in other species, however not accompanying its course, but longitudinally directed to base of narrow, hammer-like median apophysis, which originates in the very center of the bulb and is oblique. Embolus itself narrow from its origin, describing 3/4 of a circle. Conductor long and curved (Fig. 41). Chelicerae with 3 promarginal and 4 retromarginal teeth.

Measurements. Total length 13.5. Prosoma 7.5 long, 5.9 wide, Clypeus 0.38. Eye diameters and interdistances: AME 0.36, ALE 0.28, PME 0.42, PLE 0.24; AME-AME 0.16, AME-ALE 0.20, PME-PME 0.14, PME-PLE 0.26, ALE-PLE 0.14, AME-PME 0.14, MOQ length 0.88, front width 0.86, back width 0.92.

Legs: I-femur 7.6/ patella 3.8/ tibia 7.4/ metatarsus 8.0/ tarsus 3.6/ total 30.4; II- 7.1/ 3.5/ 6.9/ 7.6/ 3.2/ 28.3; III- 6.9/ 3.2/ 6.2/ 7.5/ 3.1/ 26.9; IV-8.4/ 3.5/ 8.2/ 11.5/ 4.6/ 36.2. Cymbium 3.3 long, 1.5 wide, median apophysis 0.8 long.

Leg spination. femora I p2, r1-1-1, d1-1-1; II p1-1-1, r1-1-1, d1-1-1; III p1-1-1, r1-1-1-1, d1-1- 1; IV p1-1-1, r1-2, d1-1-1; tibiae I-II v2 -2-2-2, p1- 1-1, r1-1-(1); III-IV v2 -2-2, p1-1, r1-1; metatarsi I-II v2 -2-1, p1-1-2, r1-1-2; III-IV v2 -2-2, p1-1-1, r1-1; tarsi III 0; IV v1, p1, r1.

Variation. See Table 7.

Female (IBSP 12111). Typical general coloration of genus, lateral sides of abdomen with inconspicuous white spots. Median plate of epigyne almost as wide as long, becoming wider posteriorly. Lateral plates almost completely covered by median plate which presents a little knob posteriorly(Fig. 42). Medianly bulged copulatory ducts enter the wide apart spermathecae interiorly by a strong curve (Fig. 43). Chelicerae with 3 promarginal and 3 retromarginal teeth.

Measurements. Total length 15.30. Prosoma 7.5 long 5.7 wide, Clypeus 0.32. Eye diameters and interdistances: AME 0.38, ALE 0.26, PME 0.4, PLE 0.42; AME-AME 0.2, AME-ALE 0.32, PME-PME 0.2, PME-PLE 0.4, ALE-PLE 0.22, AME-PME 0.14, MOQ length 1.0, front width 0.92, back width 1.06. Epigyne: 2.8 long, 2.6 wide.

Legs. I-femur 6.6/ patella 3.3/ tibia 6.0/ metatarsus5.3/ tarsus 2.2/ total 23.4; II- 6.1/ 3.0/ 5.3/ 5.1/ 2.3/ 21.8; III- 6.0/ 2.8/ 4.9/ 5.7/ 2.3/ 21.7; IV- 7.4 / 3.1/ 6.8/ 9.4/ 3.5/ 30.2. Leg spination: femora I p2, r1-1, d1-1-1; II p 1-1-1, r1-1; III p1-1-1, r1- 1-1-1, d1-1-1; IV p1-1-1, d1-1-1, r1-2; tibiae I v2 - 2-2-2, p1; II V2 -2-2-2, p1-1,; III v2 -2, p1-1, r1-1; IV v2 -2, p1-1, r1-1; metatarsi I v2 -2-1; II v2 -2-1, p1-1, r1; III v2 -2, p1-1-1, r1-1; IV v2 -2, p1-1-1, r1-1-1; tarsi III v1; IV v1, p1, r1.

Variation. See Table 8.

Material examined. - PERU: Huanuco: Rio Yuyapichis, Panguana (9°37'S, 74°56'W), M. Verhaagh, 1 [[male]], May 20 - June 3 1984, (SMNK 1445); 1 [[male]], Jan. 21 - Feb. 18 1984, (SMNK 1446); 1 [[male]] 1 imm., Jan. 21 - Feb. 18 1984, (IBSP 6921). BRAZIL: Acre: Parque Nacional do Divisor, L. Resende & R.S. Vieira, 2 [[males]] 1 [[female]], March 19 1997 (IBSP 12586); 3 [[males]] 2 [[females]], March 14 1997, (IBSP 12328); 2 [[males]] 3 [[females]], March 19 1997 (IBSP 12111); 1 [[male]] 1 [[female]], March 19 1997 (SMNK). Mato Grosso: Sinop, 1 [[male]], Oct. 1975, M. Alvarenga (AMNH); Claudia, 3 [[males]], July 1997, M. Caleffo (IBSP 12070).

Distribution. - Peru and Western to Central Brazil (Fig. 63).