Ancylometes jau (♂,♀) Höfer & Brescovit, 2000

Known only from the type locality in Jaú National Park, central Amazonia, Brazil.

(Holotype deposited at IBSP 6530):
Coloration as typical for genus, except for two black semicircular spots anteriorly and a median anterior subrectangular yellowish spot on dorsum of abdomen. Chelicerae with 2 promarginal and 4 retromarginal teeth.
Retrolateral tibial apophysis of palp large and sharp. Cymbium broad. Membranous lobe large, covering whole base of embolus. Conductor typically wing-shaped, median apophysis short, strongly hooked.
Measurements: Total length 13.6. Prosoma 7.0 long, 5.5 wide. Clypeus 0.30 high.
Eye diameters and interdistances: AME 0.33, ALE 0.26, PME 0.35, PLE 0.28; AME-AME 0.16, AME-ALE 0.18, PME-PME 0.11, PME-PLE 0.37, ALE-PLE 0.15, AME-PME 0.25, MOQ length 0.78, front width 0.75, back width 0.80. Cymbium 2.9 long, 1.7 wide, median apophysis 0.7 long.
Legs: I-femur 6.5/ patella 3.0/ tibia 6.3/ metatarsus 6.1/ tarsus 2.8/ total 24.7; II- 6.0/ 3.0/ 5.5/ 5.5/ 2.6/ 22.6; III- 5.3/ 2.5/ 5.0/ 5.5/ 2.2/ 20.5; IV- 6.6/ 2.8/ 6.3/ 7.8/ 2.7/ 26.2.
Leg spination: femora I p1-2, d1-1-1, r1-1-1-1; II p1-1-1-1, d1-1, r1-1-1; III p1-1-1-1, d1-1-1, r1-1-1-1; IV p1-1-1, d1-1-1, r1-1-1; tibiae I-II v2-2-2-2, p1-1, r1-1-1; III-IV v2-2-2, p1-1, r1-1; metatarsi I-II v2-2-2, p1-1-1, r1-1-1; III-IV v2-2-2, p1-1-1, r1-1-1; tarsi III v1; IV v1-2.

(Paratype deposited at IBSP 6530):
Coloration basically as in male.
Median plate of epigyne very broad in its anterior part, overlapping totally the lateral plates, narrowing rapidly to pointed posterior edge, bearing narrow projection. Spermathecae appearing by transparency of median plate. Copulatory ducts open laterally and reach spermathecae from ventral by describing a strong curve.
Chelicerae with 2 promarginal and 4 retromarginal teeth.
Measurements: Total length 13.0. Prosoma 6.4 long, 5.2 wide. Clypeus 0.3 high.
Eye diameters and interdistances: AME 0.30, ALE 0.17, PME 0.35, PLE 0.32; AME-AME 0.16, AME-ALE 0.22, PME-PME 0.12, PME-PLE 0.32, ALE-PLE 0.13, AME-PME 0.21, MOQ length 0.84, front width 0.70, back width 0.83. Epigyne: 2.3 long, 2.7 wide.
Legs: I-femur 5.0/ patella 2.8/ tibia 4.4/ metatarsus 4.2/ tarsus 2.0/ total 18.4; II- 4.8/ 2.5/ 4.1/ 4.1/ 2.2/ 17.7; III- 4.6/ 2.2/ 3.8/ 4.5/ 2.0/ 17.1; IV- 6.0/ 2.6/ 5.3/ 6.8/ 2.7/ 23.4.
Leg spination: femora I p1-2, d1-1-1, r1-1-1-1; II p1-1-1-1, d1-1, r1-1-1; III p1-1-1-1, d1-1-1, r1-1-1-1; IV p1-1-1, d1-1-1, r1-1-1; tibiae I-II v2-2-2-2, p1-1, r1-1-1; III-IV v2-2-2, p1-1, r1-1; metatarsi I-II v2-2-2, p1-1-1, r1-1-1; III-IV v2-2-2, p1-1-1, r1-1-1; tarsi III v1; IV v1-1.