Ancylometes terrenus, Höfer, H. & Brescovit, A. D., 2000

Höfer, H. & Brescovit, A. D., 2000, A revision of the Neotropical spider genus Ancylometes Bertkau (Araneae: Pisauridae), Insect Systematics & Evolution 31, pp. 323-360 : 353-359

Ancylometes terrenus sp. n.

(Pl-Fig, 2; Fig. 24-27, 56-58, 63)

Type material. - Male holotype from Reserva Florestal Ädolfo Ducke, Manaus, Amazonas, Sept. 1 1991, W. Paarmann col., deposited in INPA. Paratypes: 1 male, 1 female, from same locality, Jan. 18 1994, H. Höfer (SMNK 437); 1 female, same locality. May 11 1994, H. Höfer (INPA); 1 male, same locality, July 1995, H. Höfer (1 BSP 423709), 1 female, same locality, Feb. 7 1994, H. Höfer (INPA).

Etymology. - The specific name refers to the apparent preference of the species for terra firme habitats.

Diagnosis. - Males are the only males of the genus without white marginal bands on prosoma. Male palp with very large, rectangular transparent membranous structure on base of embolus, covering base of median apophysis, broadly overlapping base of embolus (Fig. 24, 56). Female: Epigynal median plate oval-pointed (heart-shaped), with short median, laterally invaginated protuberance. Lateral plates posteriorly broad (Fig. 57).

Description. - Male (holotype). Prosoma purpurish to golden-brown with obscured broad marginal bands (appearing in alcohol material). Abdomen dorsally dark brown, cardiac mark lighter. Venter with bright red triangle, broken by median longitudinal dark line. Legs brown, femora dorsally purpurish-red to brown with prolateral white stripes, all distal segments dorsally covered hy white hairs. Chelicerae with 3 promarginal and 4 equal sized retromarginal teeth. Palpal tibia with curved ventral and black lateral apophysis (Fig. 25). Embolus with very large, rectangular transparent membrane at base, occupying whole basal part of bulbus and covering base of evenly shaped, broad trunk of median apophysis (Fig. 24, 56).

Measurements. Total length 25.0. Prosoma 13.5 long, 11.0 wide. Clypeus 0.75. Eye diameters and interdistances: AME 0.55, ALE 0.35, PME 0.6, PLE 0.6; AME-AME 0.35, AME-ALE 0.45, PME-PME 0.3, PME-PLE 0.55, AME-PLE 0.9, AME-PME 0.2, MOQ length 1.4, front width 1.4, back width l.45. Cymbium 4.5 long, 2.8 wide, median apophysis 1.3 long (visible part).

Legs. I-femur 13.5/ patella 6.2/ tibia 14.0/ metatarsus 12.2./ tarsus 6.7/ total 54.0; II- 13.0/ 6.2/ 11.0/ 11.7/ 5.7/ 48.0; III- 11.8/ 5.0/ 10.2/ 11.3/ 4.5/ 42.0; IV- 16.0/ 5.7/ 13.3/ 17.2/ 6.0/ 63.0.

Leg spination: femora I p1-1-1, r1-1-1, d1-1-1; II p1-1-1-1, r1-1-1, d1-1-1; III p1-1-1-1, r1-1-1-1, d1-1-1; IV p1-1-1, r1-1, d1-1-1; tibiae I-II v2 -2-2- 2, p1-1, r1-1, d1-1 (I), 1-1-1 (II); III-IV v2 -2-2, p1-1, r1-1, d1-1-1; metatarsi I-II v2 -2-2, p1-1-1, r1-1-1, d0 (I), d1 (II); III v1 -1-1-1-2, IV v1 -1-1-1- 1-2; III-IV p1-1-1, r1-1-1, d1-2-2; tarsi III-IV v4 - 10. Palpal femora p1, r1, d1-1-2; patellae p1; tibia p1-1-1, r1.

Female (paratype SMNK). Prosoma brown, covered by white and purpurish hairs. Chelicerae with 3 promarginal and 4 equal retromarginal teeth. Abdomen dorsally reddish brown, ventrally with bright red triangle from the epigastric region to spinnerets, divided by central longitudinal dark band. Epigyne: Median plate drop-shaped, flat with a median cavity ending posteriorly in a prominent knob (Fig. 57). Copulatory ducts long, straight and narrow. Spermathecae relatively large and wide apart (Fig. 58).

Measurements. Total length 26.0. Prosoma 13.3 long, 11.6 wide. Clypeus 0.95. Eye diameters and interdistances; AME 0.52, ALE 0.3, PME 0.55, PLE 0.55; AME-AME 0.35, AME-ALE 0.6, PME-PME 0.3, PME-PLE 0.75, AME-PLE 1.3, AME-PME 0.35, MOQ length 1.6, front width 1.4, back width 1.45. Epigynal median plate 1.8 long, 1.0 wide.

Legs. I-femur 13.0/ patella 6.5/ tibia 10.8/ metatarsus 9.3/ tarsus 5.0/ total 45.0; II- 11.5/ 6.2/ 9.5/ 8.8/ 5.0/ 42.0; III- 10.5/ 5.2/ 8.7/ 9.2/ 4.5/ 37.5; IV- 13.5/ 5.5/ 11.0/ 14.3/ 5.5/ 50.0. Leg spination: femora I p1-1, d1-1; II p1-1, d1-1-1; III-IV p1-1, r1-1, d1-1-1; patellae III-IV p1, r1; tibiae I-II v2 - 2-2-2-2; III v2 -2-2(2-2), p1-1-1, r1-1-1, 1-1(2)-1; IV 2 -2-2, p1-1, r1-1, d1-1-1; metatarsi I-II v2 -2-1, p1, r1; III v1 -1-1-1-2, p1-1-1, r1-1-1, d1-2; IV v1 - 1-1-1-1, p1-1-1-1, r1-1-1, d1-1-1-2; tarsi III-IV v5 -7. Palpal femora p1, r1, d1-2; patellae p1; tibiae p2, r1; tarsi p2-1, r1.

Variation. See Table 10 for males and Table 11 for females.

Material examined. - BRAZIL: Acre: Xapuri, Reserva Extrativista Pimenteira, 1 [[male]] 2 [[females]] 3 imm., April 5 -7 1996, Eq. IBSP / SMNK (IBSP 8642); Parque Nacional da Serra do Divisor, 1 [[female]], Nov. 5 -11 1996, R.S. Vieira (IBSP 9271); 1 [[female]], March 19 1997, L. Resende & R.S. Vieira, (IBSP 12109). Amazonas: Manaus, INPA Campus, 1 [[female]], Aug. 29 1990, H. Höfer (INPA); Manaus, Smithsonian reserve at km 41-PDBFF, 2 [[females]], Jan. 13 1994, H. Höfer, A.D. Brescovit & T. Gasnier (INPA); Reserva Ducke, 1 [[male]], July 12 1987, H. Höfer (SMNK 307); 1 [[female]], May 11 1994, H. Höfer (SMNK 1440); 1 [[male]], Oct. 25 1995, H. Höfer (SMNK 1441); 1 [[male]], Oct. 1995, H. Höfer (INPA); 1 [[male]], without data, (IBSP 6458); 1 [[male]], Oct. 25 1995, H. Höfer, (INPA). Mato Grosso: Apiacás, 1 [[female]], Jan. 30 - Febr. 27 1997, M.E. V. Caleffo, G. Skuk (IBSP 8562).

Distribution. - Amazonas and Mato Grosso (Fig. 63).