Simone, L.R.L. 2009. Comparative morphology among representatives of main taxa of Scaphopoda and basal protobranch Bivalvia (Mollusca) . Papéis Avulsos de Zoologia. 49, 32 (Jan. 2009), 405–457. DOI:https://doi.org/10.1590/S0031-10492009003200001.