Matta Crosby, 1934

Matta Crosby, 1934: 20 (Type species, M. hambletoni Crosby, 1934).

Diagnosis. Species of the genus Matta can be distinguished from other Neotropical Tetrablemmidae by having only the two eyes, separated (Figs 23A, 27A) or fused (Figs. 2A, 16A, see Lehtinen, 1981, figs. 297-298). The eyes may be absent (Figs 7A, 14A) and the species could be confused only with Monoblemma blind Neotropical species (see Brignoli, 1978, fig 5), but differed by the strongly raised carapace (Figure 2B) and male palp with embolic projection and conductor (Fig. 3B, F). Matta species exhibit high carapace and apophysis in the male chelicerae as in Caraimata species (see Lehtinen, 1981, figs 304-305), but can be distinguished from this genus by the presence of a pair or absence of eyes, while species of Caraimata having four eyes (see Lehtinen, 1981, fig 299, 302).

Composition. Ten species: Matta hambletoni Crosby; M. angelomachadoi Brescovit; M. mackenziei Shear; M. zuiuda sp. n., Matta pititinha sp. n., Matta humhum sp. n., Matta cambito sp. n., Matta humrrum sp. n., Matta nuusga sp. n., and Matta teteia sp. n.