- Clusia obovata, Oedematopus obovatus;Oedematopus quadratus
- Colpospira quadrata, Quadrate Screw Shell;Platycolpus quadratus;Platycolpus scitulus;Turritella quadrata scitula Donald, 1900;Turritella quadrata Donald, 1900
- Preissia quadrata, Chomiocarpon commutatus;Chomiocarpon quadratus;Marchantia commutata;Marchantia quadrata;Preissia commutata;Preissia quadrata var commutata
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