The family Disderiidae, to which Harpactea hombergi belongs, are "haplogyne" spiders. These are relatively primitive, having only six eyes and simple pedipalps. The epigyne is not easily detected and is not used to determine the females to species level. Rather, the layout and number of spines on femur IV is used instead.
|Head and chelicerae of Harpactea hombergi. Note that this primitive species has only six eyes.||Chelicerae of Harpactea hombergi||Left Pedipalp (male sexual organ) of Harpactea hombergi.This is characteristic of the more primitive spiders.|
|A tarsal claw of Harpactea hombergi. Since this species is not a web dweller it does not have the central claw. Note, however, the bristly hairs that help the spider walk on vertical surfaces.||Another view of a tarsus of Harpactea hombergi|