Trachecymbius, Haddad & Lyle, 2024

Haddad, Charles R. & Lyle, Robin, 2024, Three new genera of arboreal dark sac spiders from southern Africa (Araneae: Trachelidae), Zootaxa 5399 (5), pp. 451-504 : 490-491

Key to the genus Trachecymbius gen. nov.

1 Males (♁ of T. bosselaersi sp. nov. and T. umbella sp. nov. unknown)........................................... 2

− Females............................................................................................. 4

2 RTA very short and inconspicuous ( Figs 224, 225 )................................................ T. felis sp. nov.

− RTA distinct, at least ¼ tibia length ( Figs 228 , 230 ).......................................................... 3

3 RTA thumb-like, with rounded tip; tegulum with massive subtriangular prolateral apophysis; embolus narrow, long, with tip directed prodistally ( Figs 228, 229 )...................................................... T. peterwebbi sp. nov.

− RTA triangular, with bent tip in lateral view; tegular apophysis absent; embolus short, stout, with rounded tip directed retrodistally ( Figs 230, 231 ).......................................................................... T. tyume sp. nov.

4 Copulatory openings near centre of epigyne in longitudinal curved ridges, forming heart-shaped atrium centrally ( Fig. 226 ).......................................................................................... T. felis sp. nov.

− Copulatory openings positioned anteriorly or anterolaterally, in recurved ridges ( Figs 222 , 232, 234 )................... 5

5 Copulatory openings situated in broad, semicircular ridges, with long copulatory ducts leading to lateral ST II near midpoint of epigyne, proximate to ST I ( Fig. 234 )....................................................... T. umbella sp. nov.

− Copulatory openings situated in relatively narrow ridges, with short copulatory ducts leading to ST II anteriorly in epigyne; ST I and II widely separated ( Figs 222 , 232 )................................................................... 6

6 ST II situated anterolaterally; connecting ducts of spermathecae originating anterolaterally, converging towards posterior ( Figs 222, 223 )........................................................................... T. bosselaersi sp. nov.

− ST II situated anteromedially; connecting ducts of spermathecae almost parallel, running either side of midline of epigyne ( Figs 232, 233 )............................................................................... T. tyume sp. nov.

Figures

FIGURES 224–229. Trachecymbius felis sp. nov., male (224, 225) and female (226, 227), and T. peterwebbi sp. nov. male (228, 229): 224, 228. Left palps, ventral view; 225, 229. Same, retrolateral view; 226. Epigyne, ventral view; 227. Same, dorsal view. Scale bars = 0.1 mm.

FIGURES 230–235. Trachecymbius tyume sp. nov., male (230, 231) and female (232, 233), and T. umbella sp. nov. female (234, 235): 230. Left palp, ventral view; 231. Same, retrolateral view; 232, 234. Epigynes, ventral view; 233, 235. Same, dorsal view. Scale bars = 0.1 mm.

FIGURES 222–223. Trachecymbius bosselaersi sp. nov., female epigyne in ventral (222) and dorsal (223) views. Scale bars = 0.1 mm.