Arañas terafósidas de Costa Rica (Araneae: Theraphosidae). III. Sphaerobothria, Aphonopelma, Pterinopelma, Citharacanthus, Crypsidromus y Stichoplastus

Thirteen species of theraphosid spiders ("tarantulas") are described as new. Sphaerobothria hoffmani and Aphonopelma seemanni are redescribed and the male of S. seemanni is described for the first time. It is argued that the genera discussed here, which are traditionally placed in separate subfamilies (Gram-mostolinae and Ishnocolinae) should be grouped. Common features to these genera are the shape of the bulb (distally atenuated and curved ventrally), spermatheea divided in two portions by a deep notch, and coxa 1 with anterior side covered by conic spinules. The feature formerly used to separate the two groups is not consistent within genera.