Ancylometes hewitsoni (♂,♀) (Pickard-Cambridge,1897)


transfers and synonyms

Lycoctenus hewitsoni F. O. Pickard-Cambridge, 1897
Ancylometes hewitsoni: Petrunkevitch 1911; Roewer 1954; Bonnet 1955

distribution

Amazonian: Bolivia (Beni), Brazil

description male

(specimen deposited at 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.
Chelicerae with 3 promarginal and 4 retromarginal 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-PME 0.2, PME-PLE 0.4, AME-PLE 0.9, AME-PME 0.25, 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.

description female

(specimen deposited at 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. Copulatory ducts straight, entering spermathecae ventrally, fertilization ducts directing laterally.
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.
Coloration of living specimens: Prosoma 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.

references

Höfer H., Brescovit AD. (2000):
A revision of the Neotropical spider genus Ancylometes Bertkau (Araneae: Pisauridae). Insect Systematics & Evolution. 31: 323-360
Höfer H., Beck L. (1996):
Die Spinnentierfauna des Regenwaldreservats 'Reserva Ducke' in Zentralamazonien II. Natur und Museum. 126: 69-85
Pickard-Cambridge F.O. (1897):
On cteniform spiders from the lower Amazon and other regions of North and South America, with a list of all known species of these groups hitherto recorded from the New World. Annals and Magazine of Natural History. 19: 52-106
male palp scale bar 1 mm
male palp scale bar 1 mm (wrong in orig. publ.)
male palp (SEM)
male palp (SEM)
embolus and conductor
embolus and conductor
epigyne, ventral scale bar 0.25 mm
epigyne, ventral scale bar 0.25 mm
female epigyne (SEM)
female epigyne (SEM)
vulva, dorsal scale bar 0.25 mm
vulva, dorsal scale bar 0.25 mm
vulva (SEM)
vulva (SEM)