Genus Aphantochilus O. P.-Cambridge, 1870

Figs 7 B, 7H, 10A–E, 11A–F, 12A–D, 13A–F, 14A–F, 15A–D, 16A–F, 17A–F Type species: Aphantochilus rogersi O. P.-Cambridge, 1870 Figs 7 B, 10A–E, 11A–F, 12A–D, 13A–F, 14A–F

Bucranium O. P.- Cambridge, 1881: 772: 66, fig 5. Description of juvenile. Type species Bucranium taurifrons O. P.- Cambridge, 1881, not examined. New synonymy.

Synonymy. The type species of Bucranium is here considered a typical member of the genus Aphantochilus as it fulfills criteria given in the diagnosis below. Bucranium is currently monotypic and thus, taxonomically uninformative. Aphantochilus has priority over Bucranium .

Diagnosis. Separated from other thomisid genera by the hooked-shaped ventral RTA (Figs 10 A, B, 11B, 15A, 16B, C), lack of VTA and DTA, presence of cymbial peg teeth (Figs 10 A, 11A–F, 15A, 16A–D), presence of dual spermathecal chambers with a relatively long CD (Figs 10 D, E), reduced labium, legs I and II not elongated (leg III is the shortest) and spine-like prosomal projections (Figs 13 A, B, 17A-C). Other characters that distinguish Aphantochilus are the presence of a femoral apophysis (FA, Figs 11 E, 16A), ant mimicking behavior of its members (Oliveira & Sazima 1984) and cymbial modifications of the male palp (which is closely associated with the RTA).

Composition. Four species, A. cambridgei Canals, 1933, A. inermipes Simon, 1929, A. rogersi O. P.-Cambridge, 1870, and A. taurifrons O. P.- Cambridge, 1881 comb. nov.