Streptaxoidea is a superfamily of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the suborder Achatinina of the order Stylommatophora.
There have been recognized the only family Streptaxidae within Streptaxoidea in the taxonomy of Bouchet & Rocroi (2005).
Sutcharit et al. (2010) have established a new family Diapheridae within Streptaxoidea as follows:
Rowson et al. (2011) have confirmed monophyly of Streptaxidae and Diapheridae as its sister group.