Auyantepuia aluku Ythier 2018

Auyantepuia aluku Ythier, 2018 Diagnosis (Ythier & Chevalier 2020) Species of medium size when compared with the average size of the other species of the genus, with a total length ranging from 20–26 mm in males and 20–23 mm in females. General coloration reddish brown. Carapace reddish yellow, intensely marked with brownish variegated spots around the ocular tubercle and on the anterior and posterior edges of the carapace; ocular tubercle darker, almost black. Tergites reddish brown with confluent reddish yellow spots on the sides and the middle of tergites. Venter yellowish to reddish yellow. Metasomal segments reddish yellow, marked with variegated brownish spots on lateral and dorsal sides of segments I to V; ventral side with weakly marked variegated brownish spots on segments IV and V, other segments without spots. Vesicle reddish yellow with basis of aculeus brownish and tip of aculeus reddish. Chelicerae yellowish with variegated dark brown spots; fingers reddish yellow with dark brown spots, teeth reddish. Pedipalps reddish brown, with longitudinal dark brown spots. Legs yellowish, marked with brownish spots. Carapace lustrous and acarinate, with some minute punctations; furrows shallow; anterior edge emarginated. Tergites acarinate, almost smooth and shiny. Pectinal tooth count ranging from 7– 7 in males and 5–6 in females. Sternites smooth and shiny, VII acarinate; spiracles rounded in shape. Only metasomal segments IV and V longer than wide; metasomal tegument almost lustrous, with lateral sizes covered with medium size granulation on all segments in male, smooth in female; medium size granulation on ventral side of segments III to V in male, only on segment V in female, these granules are spinoid on segment V; carinae on segments I–V vestigial or absent; only lateral supramedian carinae are weakly marked on segments I to IV. Pedipalp femur with dorsal internal, dorsal external and ventral internal carinae moderately marked; internal face weakly granular, other faces smooth; patella smooth, with all carinae vestigial; chela manus dorsal surface weakly granulated on distal half in both sexes, internal surface almost smooth, with few scattered granules in male and smooth in female, dorso-internal carina weakly marked; dentate margins on fixed and movable fingers with six rows of granules. Material examined Holotype FRENCH GUIANA • ♀; Apatou, Crevette River; 30 Jun. 2017; J. Chevalier and P. Gallier leg.; JCAUCRE17; MNHN Paratypes FRENCH GUIANA • 4 ♀♀; same data as for holotype; EYPC, EY0094. Other material FRENCH GUIANA • 3 ♂♂, 3 ♀♀; Natural Reserve La Trinité; Oct. 2018; J. Chevalier leg.; JCPC • 1 ♂, 1 ♀, 2 immature ♂♂, 3 immature ♀♀; Natural Reserve La Trinité; Apr. 2019; J. Chevalier leg.; JCPC • 2 ♂♂, 1 ♀; same collection data as for preceding; EYPC, EY0171 • 1 ♂, 1 juvenile ♂; Natural Reserve La Trinité, at the top of the inselberg; 13 Apr. 2019; J. Chevalier leg.; EYPC, EY0172 • 5 ♂♂, 1 ♀; Natural Reserve La Trinité, Aya; Oct. 2010; C. Courtial leg.; EYPC, EY0496. Distribution Auyantepuia aluku is distributed in northwestern French Guiana and has been reported from Apatou (type locality) and the Natural Reserve La Trinité (Fig. 4).