Goodfriend, G. A. (1986). Radiation of the land snail genus Sagda (Pulmonata: Sagdidae): comparative morphology, biogeography and ecology of the species of north-central Jamaica. Zoological Journal of the Linnean Society. 87(4): 367-398.
Radiation of the land snail genus <i>Sagda</i> (Pulmonata: Sagdidae): comparative morphology, biogeography and ecology of the species of north-central Jamaica