Zachrysia (Megachrysia) petitiana (d'Orbigny, 1841)

    Villa Clara Province, Cuba (77.7 mm.) The only larger helicoid landsnail in the New World is Solaropsis gibboni (L. Pfeiffer, 1846), which regularly reaches over 80 mm. in maximum diameter.

d'Orbigny, A., 1841. Mollusques. Histoire Physique, Politique et Naturelle de l'île de Cuba 1. Arthus Bertrand, Paris. Pp 1-240, pls. 1-10?  [Collation per Rosenberg, 2009 <http://www.malacolog.org/bibliography.php?mode=search&autstr=**Orbigny**&year=&yearend=&title=&titvol=&pubstr=&showspecies=y&submit=Search >]

Pilsbry, H.A., 1893-1895. Manual of Conchology (second series) 9. Helicidae, vol. 7; index to the helices. Academy of Natural Sciences, Philadelphia. Frontispiece + xlviii + 1-366 + 71 pls. Nov. 16 to April. <http://biodiversitylibrary.org/page/1102607>

Pilsbry, H.A., "1928" [1929]. Studies on West Indian Mollusks: The Genus Zachrysia. Proceedings of the Academy of Natural Sciences of Philadelphia 80: 581–606 <not available on-line except through JSTOR>

Poey, F., 1856-1858. Memorias sobre la historia de la isla de Cuba II <http://biodiversitylibrary.org/page/2513061>

Rosenberg, G., 2009. Malacolog 4.1.1: A Database of Western Atlantic Marine Mollusca. Electronic database accessible at  <http://www.malacolog.org/>.