Ami pijaos Jimenez & Bertani

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 : 62

Ami pijaos Jimenez & Bertani , sp. nov.

( Figs 22–29 , 41 ; Tables 6–7 )

Types: Holotype male (ICN–Ar–1995), Tolima, Ibague, [4º30’N, 75º15’W] 1290m, Colombia, H. Pulido, 3 Feb 2002, and paratype female (ICN–Ar–997), Puerto Boyaca, [5º50’9”S, 74º23’16”N] Boyaca, Colombia, 320m, J. Pinzon, May 1996; deposited in ICN–Ar.

Etymology: The specific epithet is a noun in apposition honoring and recalling the Pijaos , ancient ethnical culture that populated this specific region of Colombia.

Diagnosis: The male differs from those of all other Ami species by the presence of only one retrolateral process on the palpal tibiae and from most Ami (except A. caxiuana ) in the palpal organ having a third keel between the prolateral superior and prolateral inferior keels. ( Figs 24–25 ). The female differs from all those of all other Ami species by having spermathecae with two paired back-plates without modified receptacles ( Fig. 29 ). This species is closely related to A. weinmanni (see Cladistics).

Description: Male (holotype): Total length, excluding chelicerae and spinnerets, 21.0. Carapace length 8.7, width 7.4. Anterior eye row slightly procurved, posterior recurved. Eyes sizes and interspaces: AME 0.40, ALE 0.46, PME 0.32, PLE 0.31 AME–AME 0.17, AME–ALE 0.07 PME–PME 0.071, PME–PLE 0.04, ALE–PLE 0.21, OQ length 0.86, width 1.68, clypeus 0.4. Fovea transverse, width 1.1. Labium length 0.7, width 1.1, with 10 cuspules, maxillae with ca. 40 cuspules on inner third. Sternum length 3.2; width 2.6. Chelicerae with 11 teeth on promargin and 14 smaller teeth on proximal retromargin. Tarsi I–IV densely scopulated: entire on I, II; III, divided in apical half; IV, divided by strip of longer, thicker setae. Metatarsi I scopulate for distal 9/10; II, for distal 2/3; III, apically scopulate (1/3); IV, ascopulate. Palpal tibia with one distal conical process on retrolateral surface ( Figs 22–23 ). Tibia I with paired distal proventral apophyses with spine retrolaterally ( Fig. 28 ). Flexion of metatarsus I retrolateral with respect to tibial apophyses. Palpal organ piriform ( Figs 24–27 ). Spination: femora, patellae and tarsi, I–IV and palp, 0. Tibiae: palp 2V; I 0; II 2V; III 3V, 2P; IV 3V, 1P, 1R. Metatarsi: I 0; II 2V; III 2V, 2P; IV 5V, 2P, 2R. Color: cephalothorax and abdomen light reddish-brown, femora reddish-brown. Carapace reddish-brown; coxae of legs and pedipalps light brown, femora reddish brown, other segments of legs and palps dark brown, abdomen brown.

Female (paratype): Total length, excluding chelicerae and spinnerets, 33.2. Carapace length 14.2, width 11.3. Anterior eye row straight to slightly procurved, posterior row slightly recurved. Eye sizes and interspaces: AME 0.24, ALE 0.46, PME 0.34, PLE 0.36, AME–AME 0.28, AME–ALE 0.12, PME–PME 0.72, PME–PLE 0.04, ALE–PLE 0.12, OQ length 1.6, width 2.6, clypeus 0.2. Fovea procurved, width 0.6. Labium length 1.1, width 1.5, with 18 cuspules, maxillae with ca. 43 cuspules on inner third. Sternum length 5.2. Chelicerae with 9 teeth on promargin and 14 small teeth on proximal retromargin. Tarsi densely scopulate: entire on I, II; III apically divided by strip of longer, thicker setae; IV divided. Metatarsal scopulae: for distal 9/10 of I, distal 2/3 of II, for distal 1/3 of III; IV ascopulate. Spination: femora, and tarsi of palp and I–IV, 0. Tibiae: I 2V; II 1V; III 4V, 1P; IV 3V, 1R, palp 3V, 1P. Metatarsi: I 1V; II 4V; III 4V, 2P, 2R; IV 8V, 1P, 2R, 2D. Color: chelicerae dark brown, carapace reddish brown. Coxae of legs and palps light brown, other segments reddish brown, abdomen dark-brown. Spermathecae with two paired back-plates without modified receptacles ( Fig. 29 ).

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.