A revision of the tracheline sac spider genus Cetonana Strand, 1929 in the Afrotropical Region, with descriptions of two new genera (Araneae Corinnidae) Author Lyle, Robin Author Haddad, Charles R. text African Invertebrates 2010 2010-12-31 51 2 321 321 http://www.bioone.org/doi/abs/10.5733/afin.051.0206 journal article 10.5733/afin.051.0206 2305-2562 7913561 Afroceto gracilis sp. n. Figs 15 , 77–79 Etymology: From Latin gracilis (slender); refers to the slender embolus of the male. Diagnosis:The male can easily be recognised by the slender, pointed embolus, which runs prolaterally of the tegulum at its base and obliquely towards the retrolateral margin in its distal section ( Fig. 78 ). The tegular sperm duct has two sharp bends, one proximal and the second retrolateral ( Fig. 78 ). The retrolateral tibial apophysis is short and triangular, with a broad base and dorsally directed rounded tip ( Fig. 79 ). Female unknown. Description: Male. Measurements: CL 1.50–2.23, CW 1.15–1.65, AL 1.81–2.56, AW 0.96–1.56, TL 3.69– 5.04, FL 0.10–0.23, SL 0.88–1.19, SW 0.80–1.00, AME–AME 0.08, AME–ALE 0.02, ALE–ALE 0.37, PME–PME 0.14, PME–PLE 0.10, PLE–PLE 0.59. Length of leg segments (sequence from femur to tarsus, and total): I 1.90+0.88+1.47+1.20+0.84=6.29; II 1.67+0.78+1.31+1.14+0.80=5.70; III 1.20+0.63+0.88+1.06+0.51=4.28; IV 1.78+0.73+ 1.49+1.75+0.64=6.39. Carapace brown to dark brown nearing borders ( Fig. 15 ); highest point in first third of carapace; gradually decline until last quarter, last quarter with steep decline; surface finely granulate, covered in short, fine setae; fovea distinct, at two thirds carapace length. Ocular region brown, with dark brown rings around eyes; AER recurved, AME slightly larger than ALE; clypeus height subequal to AME diameter; AME separated by distance equal to approximately half their diameter; AME separated from ALE by 0.33 AME diameter; PER slightly recurved, PME slightly larger than PLE; PME separated by distance slightly larger than their diameter; PME separated from PLE by distance slightly less than PME diameter. Chelicerae brown, darker towards fang base; long, fine setae scattered on anterior surface, slightly longer towards fang base; fangs orange, darker towards fang base; three promarginal teeth, median tooth largest, distal tooth smallest; two retromarginal teeth, distal tooth largest. Sternum pale orange, brown towards border; surface covered in short fine setae. Abdomen pale yellow to orange dorsally, with grey stripe laterally, extending to half abdomen length; abdomen broader anteriorly, tapering posteriorly; abdomen with brown scutum covering almost entire dorsum; two pairs of pale brown, indistinct sigilla. Legs I to IV yellow to light brown, dense ventral setae on tibiae, metatarsi and tarsi; anterior legs more robust than posteriors; femora with large incomplete band covering almost entire segment, patellae with incomplete dorsal band, tibiae and metatarsi with two incomplete bands, situated proximally and distally; leg spines and cusps present. Leg spination: femora: I pl 2, II pl 1, III pl 1; patellae spineless; tibiae: I plv 7–8 rlv 3 vt 2 cusps, II plv 4–5 cusps, III pl 1 plv 1 vt 2, IV vt 2; metatarsi: I plv 10–12 rlv 7–8 vt 1–2 cusps, II plv 8–9 rlv 3–4 vt 1–2 cusps, III pl 1 rl 1 plv 1, IV pl 1 rl 1 plv 1 rlv 1 vt 2; tarsi: I plv 4–5 rlv 4 cusps, II plv 4–5 rlv 3–4 cusps ( Fig. 77 ). Palp brown, tegulum elongate; embolus originating prolaterally, curving retrolaterally toward cymbium tip, distal section slender and pointed; sperm duct with sharp proximal and retrolateral bends ( Fig. 78 ); retrolateral tibial apophysis short and triangular, with broad base, tip rounded and directed dorsally ( Fig. 79 ). Figs 77–79. Afroceto gracilis sp. n. male: (77) schematic representation of cusp arrangement on legs I and II; (78) left palp, ventral view; (79) left palp, retrolateral view. Scale bar (78, 79) = 0.1 mm. Holotype : ♂ SOUTH AFRICA : Mpumalanga : Dullstroom , Sakhelwe Location , 25°24.887'S : 30°05.572'E , 2017 m , 26–29 xi.2008 , L. Makaka , pitfall traps ( NCA , 2009/4819). Fig. 80. Distribution of Afroceto croeseri sp. n. , A. flabella sp. n. and A. gracilis sp. n. in South Africa. Paratypes : SOUTH AFRICA : Mpumalanga : 1♂ Dullstroom , Groblers Farm , 25°20.002'S : 30°06.292'E , 1950 m , 26–29 xi.2008 , L. Makaka , pitfall traps ( NCA , 2009/4817) ; 1♂ Dullstroom , Verloren Vallei Nat. Res. , 25°18.832'S : 30°07.791'E , 2189 m , 26–29 xi.2008 , L. Makaka , pitfall traps ( NCA , 2009/4818) ; 1♂ Veloren Vallei Nat. Res. , Block 3, 25°18.832'S : 30°07.791'E , 29.xi–2 xii.2008 , L. Makaka , pitfall traps ( NCA , 2010/226) ; 1♂ Roger Croall , 25°32'S : 30°04'E , 26–29 xi.2008 , L. Makaka , pitfall traps ( NCA , 2010/223) . Distribution: Known only from the Dullstroom district in Mpumulanga Province, South Africa ( Fig. 80 ).