Oligoxystre dominguense

Description. Male (Holotype). Total length: 18.1. Carapace: length 7.5; width 6.13. Eye tubercle: length 1.03; width 1.3. Labium: length 0.61; width 1.24. Sternum: length 3.38; width 3.06. Basal segment of chelicera with 8 teeth. Labium with 4 cuspules. Maxillae with 17 – 19 cuspules. Thoracic furrow straight, narrow. Palp: femur 4.41 / patella 2.97 / tibia 3.6 / cymbium 1.65 / total 12.63. Legs I: femur 7.37 / patella 4.43 / tibia 5.28 / metatarsus 5.67 / tarsus 3.26 / total 26.01. II: 6.78 / 3.78 / 5.02 / 5.02 / 3.06 / 23.66. III: 5.93 / 2.8 / 4.17 / 5.15 / 3.06 / 21.11. IV: 7.63 / 3.32 / 6.59 / 6.91 / 3.19 / 27.64. Spines: Palp: femur (d) 0 - 0 - p 1, patella 0, tibia (r) 0 - 0 - 1, (p) 0 - 1 - 1; Legs: I: femur (d) 0 - 0 - p 2, patella 0, tibia (v) 2 - 2 - ap 1, (p) 1 - 1 - 0, metatarsus (v) 1 - 0 - 0, (p) 1 - 0 - 0; II: femur (d) 0 - p 1 - p 2, patella 0, tibia (v) 1 - 2 - ap 2, (p) 1 - 1 - 0, metatarsus (v) 1 - 0 - 0, (p) 1 - 0 - 0; III: femur (d) 3 - 3 - 2, patella 0, tibia (r) 0 - 1 - 1, (v) 3 - 3 - ap 3, (p) 1 - 1 - 0, metatarsus (d) 0 - 0 - p 1, (r) 0 - 1 - 1, (v) 1 - 0 - ap 2, (p) 1 - 1 - 1; IV: femur (d) 3 - 2 - 2, patella 0, tibia (r) 1 - 1 - 1, (v) 2 - 2 - 2, (p) 1 - 1 - 0, metatarsus (d) 0 - 0 - r 1, (r) 0 - 1 - ap 1, (v) 1 - 0 - 0, (p) 1 - 0 - 0. Retrolateral lobe of cymbium slightly larger than prolateral lobe. Palpal bulb with long embolus with keel on subterminal portion (Figs. 26 – 28). External branch of tibial spur enlarged apically and with spine inserted at its midlength, internal branch with spine inserted on its base (Fig. 25). Metatarsus I slightly curved, not touching tibial spur when flexed. Scopula on metatarsi: I entire, apical ¾ of II, apical half of III – IV. Legs covered by many long white setae. Carapace brown. Abdomen dark brown. Female (Paratype IBSP 9467). Total length: 27.4. Carapace: length 11.06; width 9.01. Eye tubercle: length 1.37; width 1.83. Labium: length 0.89; width 1.88. Sternum: length 5.24; width 4.32. Basal segment of chelicera with 8 teeth. Labium with 3 cuspules. Maxilla with 14 – 18 cuspules. Thoracic furrow straight. Palp: femur 5.44 / patella 3.92 / tibia 3.25 / tarsus 3.86 / total 16.47. Legs I: femur 7.37 / patella 5.28 / tibia 5.35 / metatarsus 4.76 / tarsus 2.8 / total 25.56. II: 6.52 / 4.56 / 4.63 / 4.24 / 2.8 / 22.75. III: 6.26 / 3.98 / 4.24 / 4.96 / 2.87 / 22.31. IV: 7.83 / 4.63 / 6.33 / 6.78 / 3.26 / 28.83. Spines: Palp: femur (d) 0 - 0 - p 1, patella 0, tibia (v) 0 - 0 - ap 2, (p) 0 - 2 - 0; Legs: I: femur (d) 0 - 0 - p 1, patella 0, tibia (v) 1 - 1 - ap 1, (p) 0 - 1 - 0, metatarsus (v) 1 - 0 - 0; II: femur (d) 0 - 0 - p 1, patella 0, tibia (v) 0 - 1 - p 1, (p) 1 - 1 - 0, metatarsus (v) 0 - 1 - 0; III: femur (d) 0 - 2 - 2, patella 0, tibia (r) 1 - 1 - 0, (v) 0 - p 1 - ap 2, (p) 1 - 1 - 0, metatarsus (r) 0 - 1 - 1, (v) 2 - 0 - ap 3, (p) 1 - 1 - 1; IV: femur (d) 0 - 0 - r 1, patella 0, tibia (r) 0 - 0 - 1, (v) 0 - p 1 - ap 2, metatarsus (r) 0 - 1 - 1, (v) 1 - p 1 - ap 3, (p) 0 - 1 - 1. Spermathecae paired, receptaculum very long, with small lobes over its entire length (Fig. 29). Long white setae covering legs. Coloration as in male.

Types. Holotype: Male, (IBSP 8625), São Domingos, Goiás, Brazil, A. Chagas Junior & M. G. Bichuette leg., IV. 2000. Paratype: Female (IBSP 9467), Serra da Mesa, Minaçú, Goiás, Brazil; Two males (IBSP 12505, MZSP 26536), São Domingos, Goiás, Brazil.

Diagnosis. Males may be distinguished from all other species by the bulb with a long embolus with a slight curvature subapically, where there is a small keel (Figs. 26 – 28). Females may be distinguished by the spermathecae formed by two long and thin receptacula, with small lobes over its entire length (Fig. 29).

Etymology. named after the type-locality.