World Register of Marine Species (WoRMS)
WoRMS (2026). Orbis I. Lea, 1833&nbsp;&#8224;. Accessed at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=1023651 on 2026-08-01
Lea, I. (1833). Contributions to Geology. Carey, Lea and Blanchard, Philadelphia, 227 pp. + 6 pls.