Early Miocene; Recent..
Original Description (from Reeve, 1859, p. 122):
"THE HOOKED CALYPTRAEA. Shell depressly cap-shaped, thin, slightly wrinkled, radiately densely very minutely striated, top posterior, sharply depressly hooked; transparent-white, hyaline; internal appendage oblique, prominent.
Hab. Island of St. Thomas, West Indies.
A hyaline, sharply-hooked, rather depressly cap-shaped shell, from the West Indies, composed of the same minute thread-rayed tissue as the Philippine Island species."
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