Ami weinmanni Pérez-Miles, 2008

Pérez-Miles, Fernando, Gabriel, Ray, Miglio, Laura, Bonaldo, Alexandre, Gallon, Richard, Jimenez, Juan Jacobo & Bertani, Rogerio, 2008, Ami, a new Theraphosid genus from Central and South America, with the description of six new species (Araneae: Mygalomorphae), Zootaxa 1915, pp. 54-68 : 64

Ami weinmanni Pérez-Miles , sp. nov.

( Figs 32–34 , 43–45 . Tables 9–10 )

Type: Holotype male and paratype female, La Azulita [7º16’18”N, 71º56’25”W] Apure, Venezuela; 26 September 2002, Dirk Weinmann, FCE–MY.

Etymology: The specific epithet is a patronym in honor of Dirk Weinmann, arachnologist and collector of the type specimens.

Diagnosis: The male differs from those of other species of Ami in the very reduced number of cuspules on labium (4). The females differ from those of most species of Ami in the morphology of the spermathecae with two basal plates and without modified receptacles and from A. pijaos in the presence of a single large striated receptacle ( Fig. 36 ) which additionally differs from other species of Ami in the presence of very short sub-triangular tarsi with a particular longitudinal rhomboid scopulae division (43–44). This species is closely related to A. pijaos (see Cladistics).

Description: Male (holotype). Total length, excluding chelicerae and spinnerets 20.5. Carapace length 10.5, width 10.3. Anterior eye row slightly procurve posterior slightly recurve. Eyes sizes and interspaces: AME 0.32, ALE 0 44, PME 0.34, PLE 0.80, AME–AME 0.22, AME–ALE 0.14, PME–PME 0.72, PME–PLE 0.04, ALE–PLE 0.10, OQ length 0.80, width 1.70, clypeus 0.20. Fovea transverse, width 2.0. Labium length 1.5, width 1.4 with 4 cuspules, maxillae with ca. 42 cuspules on inner quarter. Sternum length 4.1. Chellicerae with 11 teeth on promargin and 12 small teeth on proximal retromargin. Tarsi I–IV densely scopulate; scopula I–II entire; III, divided by narrow strip; IV, clearly divided. Metatarsi I and II scopulate for apical half III, scopulate for apical third; IV, ascopulate. Palpal tibia with two distal conical processes on retrolateral surface ( Fig 32 ). Tibia I with paired distal proventral apophyses ( Fig. 33 ). Flexion of metatarsus retrolateral with respect to tibial apophyses. Palpal organ piriform ( Figs 34–35 ). Spination: femora I–IV and palp, 0. Patellae I–IV and palp, 0. Tibiae I 1V; II 2V; III 4V, 1P, 1R; IV 3V, 1P, 1R; palp 1V. Metatarsi I 0; II 4V; III 6V, 3P, 2R 1D; IV 11V, 2P, 2R, 1D. Tarsi I–IV and palp, 0. Color: cephalothorax, abdomen and legs reddish-brown.

Female (paratype): Total length, excluding chelicerae and spinnerets 26.8. Carapace length 12.8, width 11.5. Anterior eye row slightly procurved, posterior straight. Eyes sizes and interspaces: AME 0.40, ALE 0.60, PME 0.36, PLE 0.40, AME_AME 0.30, AME–ALE 0.16, PME–PME 0.98, PME–PLE 0.06, ALE–PLE 0.18, OQ length 1.06, width 1.96, clypeus 0.16. Fovea transverse, width 2.3. Labium length 1.2, width 2.3 with 10 cuspules, maxillae with ca. 61 cuspules on inner third. Sternum length 5.4. Chelicerae with 11 teeth on promargin and 12 small teeth on proximal retromargin. Tarsi I–IV short, subtriangular, densely scopulated. Scopulae I–IV divided only distally by medial rhomboid patch of longer conical setae that pass over claw tufts ( Figs 43–44 ). Metatarsi I fully scopulate, II scopulate for apical half, III scopulate for apical third, IV ascopulate. Spination: femora I–IV and palp 0, patellae I–IV and palp 0. Tibiae I 2V, 1P; II 3V; III 3V, 2P, 1R; IV 2V, 1P, 2R; palp 3V, 2P. Metatarsi I 2V; II 4V; III 3V, 3P, 2R; IV 6V, 2P, 3R, 1D. Tarsi I–IV and palp 0. Spermathecae: two basal plates with one fused striated receptaculum ( Fig. 36 ). Color: cephalothorax, abdomen and legs reddish-brown. Modified Type I urticating hairs with area b longer than usual.

Figures

FIGURES 17 – 38. Ami species. 17 – 18. A. bladesi, male, left palpal organ,. 17. Prolateral view; 18. Retrolateral view. 19 – 20. A. obscura, male, right palpal organ. 19. Retrolateral view, 20. Prolateral view. 21. A. obscura, male, right tibial apophyses, proventral view. 22 - 23. Ami pijaos, male, left palpal tibiae, showing retrolateral process. 22. Dorsal view; 23. Ventral view. 24 – 27. A. pijaos, male, left palpal organ. 24. Prolateral view. 25. Retrolateral view; 26. Prodorsal view. 27. Retrodorsal view. 28. A. pijaos, male, left tibial apophyses, proventral view. 29. A. pijaos, spermathecae, ventral view. 30. Ami amazonica, female, dorsal view. 31. A. amazonica, spermathecae, ventral view. 32. A. weinmanni, male, left palpal tibia, dorsal view, showing two retrolateral processes. 33. A. weinmanni, male, left tibial apophyses, proventral view. 34 – 35. A. weinmanni, male, left palpal organ. 34. Prolateral view; 35. Retrolateral view. 36. A. weinmanni, spermathecae, ventral view. 37 – 38. Ami weinmanni, dorsal view. 37. Male; 38. Female.

FIGURES 39 - 45. Ami species. 39. A. yupanquii, female, habitus. 40. A. bladesi, male, habitus. 41. A. pijaos, male, habitus. 42. A. amazonica, female, habitus. 43 – 44. Ami weinmanni, female tarsus II, ventral view. 43. Tarsal scopula with distal rhomboidal group of longer setae. 44. Close-up of distal tarsal scopula showing group of longer setae. 45. A. weinmanni, male, modified Type I abdominal urticating hairs, with area b longer than usual.