Pecten rudis G. B. Sowerby I in Darwin, 1846
SOWERBY I, G. B. 1846. Descriptions of Tertiary Fossil Shells from South America. In: C. Darwin: Geological Observations of South America: Being the Third Part of the Geology of the Voyage of the Beagle, Under the Command of Capt. Fitzroy, R. N. During the years 1832 to 1836. Smith, Elder, London. Appendix: 249-264. London, 1846. [p. 254, pl. 3, fig. 32]
«PECTEN RUDIS — PI. Ill. fig. 32.
Pecten testa suborbiculari, subinaequivalvi, crassiuscula, rudi, costis radiantibus 22, rotundatis, interstitiis angustioribus; intermediis nonnunquam fere obsoletis; margine valide undulato.
The specimen is only a fragment; another fragment accompanies it, which may possibly be the opposite valve.
Coquimbo, Chiloe.» GEORGE BRETTINGHAM SOWERBY I, 1846
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C. Darwin, 1846, plate 3.
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