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.