Afroceto flabella Lyle & Haddad 2010, sp. n.
Creators: name: Lyle, Robin
name: Haddad, Charles R.
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Trachelidae
Afroceto
Afroceto flabella

description: Afroceto flabella sp. n.   Figs 13, 14, 72–76  
 Etymology: From Latin flabellum (small fan); refers to the flattened, fan-like structure of the male embolus.   
Diagnosis: The male can easily be recognised by the flattened tip of the embolus and the U­shaped sperm duct running along the margins of the tegulum, and the small, sharply pointed retrolateral tibial apophysis (Figs 73, 74). The female can easily be recognised by the broad subtriangular shape of the anterior epigynal hood with lateral extensions leading to the copulatory openings (Fig. 75), along with small spherical ST II above the copulatory openings, and large, oval, laterally projecting ST I (Fig. 76).  
Description:  
 Male.   
Measurements: CL 2.80, CW 2.28, AL 2.90, AW 1.75, TL 5.50, FL 0.18, SL 1.53, SW 1.30, AME–AME 0.13, AME–ALE 0.05, ALE–ALE 0.53, PME–PME 0.15, PME–PLE 0.18, PLE–PLE 0.80. Length of leg segments (sequence from femur to tarsus, and total): I 2.38+1.10+2.05+1.55+1.03=8.11; II 2.20+1.00+1.78+1.50+1.05=7.33; III 1.48+ 0.75+1.13+1.30+0.60=5.26; IV 2.18+0.85+1.73+2.00+0.68=7.44.  
 Carapace dark orange, fading to pale yellow posteriorly (Fig. 13); first third of carapace rounded, last two thirds with a gradual decline; surface smooth, covered in short, fine setae; fovea short, distinct, at two thirds abdomen length. Ocular region brown with dark brown rings around eyes; AER very slightly recurved, AME slightly larger than ALE; clypeus height subequal to AME diameter; AME separated by distance approximately equal to 0.8 their diameter; AME separated from ALE by 0.4 AME diameter; PER recurved, PME slightly larger than PLE; PME separated by approximately 1.1 times their diameter; PME separated from PLE by distance equal to PME diameter. Chelicerae brown, darker towards fang base; long, fine setae scattered on anterior surface, slightly longer towards fang base; fangs bright orange, darkening towards fang base; three promarginal teeth, median tooth largest, proximal tooth smallest; two retromarginal teeth, distal tooth largest. Sternum pale yellow, brown towards border; surface covered in short fine setae. Abdomen pale yellow to orange dorsally, with broad yellow stripe laterally and orange band dorsally across abdomen; abdomen broader anteriorly, tapering posteriorly; scutum almost covering entire abdomen length; two pairs of distinct sigilla, anterior pair slightly paler brown than posterior pair, situated either side of midpoint; venter pale yellow­grey. Anterior legs pale brown and more robust, posterior legs darker brown; metatarsi and tarsi covered with dense scopulae, remaining leg segments covered in pale fine setae; leg spines and cusps present. Leg spination: femora: I pl 3, II pl 3; patellae spineless; tibiae: I plv 7 cusps, II plv 4 cusps, III pl 1 plv 2 vt 2, IV plv 4 vt 2; metatarsi: I plv 7 rlv 6 vt 1 cusps, II plv 9 rlv 4 cusps, III pl 1 rl 1 plv 2, IV plv 4 rlv 1; tarsi: I plv 5 rlv 9 cusps, II plv 8 rlv 1 cusps (Fig. 72). Palp yellow­brown, tegulum elongate; embolus originating prolaterally, curving retrolaterally, tip round and flattened; sperm duct U­curved, narrower at embolus base; retrolateral tibial apophysis small, triangular, sharply pointed (Figs 73, 74).   
 Female.   
Measurements: CL 2.70, CW 2.10, AL 3.20, AW 1.80, TL 5.90, FL 0.13, SL 1.60, SW 1.28, AME–AME 0.13, AME–ALE 0.05, ALE–ALE 0.53, PME–PME 0.15, PME–PLE 0.18, PLE–PLE 0.83. Length of leg segments (sequence from femur to tarsus, and total): I 2.28+1.05+1.68+1.40+1.10=7.51; II 2.03+0.95+1.50+1.40+1.03=6.91; III 1.58+ 0.88+1.08+1.30+0.58=5.42; IV 2.30+0.75+1.80+2.10+0.65=7.60.  
 Carapace light orange, paler orange posterior to midpoint (Fig. 14); first third of carapace rounded, last two thirds with gradual decline; surface covered in short fine setae; fovea short, distinct, thickened, at two thirds CL. Ocular region orange with dark brown rings around eyes; AER recurved, AME slightly larger than ALE; clypeus height equal to AME diameter; AME separated by distance slightly less than their diameter; AME separated from ALE by distance equal to 0.5 AME diameter; PER recurved, PME and PLE subequal in size; PME separated by distance equal to their diameter; PME separated from PLE by distance equal to PME diameter. Chelicerae brown, darker towards fang base; long, fine setae scattered on anterior surface; fangs orange­brown; three promarginal teeth, median tooth largest, distal tooth smallest; two retromarginal teeth, distal tooth largest. Sternum pale yellow, brown towards border; surface with scattered long brown setae. Abdomen cream, without markings dorsally; abdomen broader anteriorly, tapering posteriorly; venter cream. Legs I to IV uniform light brown; anterior legs slightly more robust than posteriors; tibiae, metatarsi and tarsi with dense scopulae ventrally, remaining segments covered with fine setae; cusps absent. Leg spination: femora: I pl 1; patellae spineless; tibiae: III pl 1 plv 2, IV plv 2 vt 2; metatarsi: III pl 1 rl 1 plv 1, IV pl 1 rl 1 plv 2. Epigyne weakly sclerotised; anterior hood subtriangular, with lateral extensions leading to copulatory openings; ST II small, rounded, anterior to copulatory openings; ST I large, oval, projecting laterally, situated posterior to copulatory openings (Figs 75, 76).   
 Holotype ♂ and Allotype ♀: SOUTH AFRICA: Eastern Cape: Grahamstown [33.3°S: 26.5°E], ii.1933, R.F. Lawrence (SAMC, B8279).   
Distribution: Known only from the type locality (Fig. 80).
description: Published as part of Lyle, Robin & Haddad, Charles R., 2010, A revision of the tracheline sac spider genus Cetonana Strand, 1929 in the Afrotropical Region, with descriptions of two new genera (Araneae Corinnidae), pp. 321 in African Invertebrates 51 (2) on pages 354-357, DOI: 10.5733/afin.051.0206, http://zenodo.org/record/7913561