MolluscaBase name details
original description
(of Arca obesiformis Grzybowski, 1899 †) Grzybowski, J. (1899). Die Tertiärablagerungen des nördlichen Peru und ihre Molluskenfauna. <em>Neues Jahrbuch für Mineralogie, Geologie und Paläontologie, Beilage Band.</em> 12(3): 610-644, pls. 15-20.
page(s): 633, pl. 18, fig. 3, 3a [details]
basis of record
Spieker, E. M. (1922). The paleontology of the Zorritos Formation of the north Peruvian oil fields. <em>The Johns Hopkins University, Studies in Geology.</em> 3: 1-197, pls. 1-10., available online at https://www.biodiversitylibrary.org/page/19066928
page(s): 115, pl. 6, fig. 1-2 [details]