Dear Paul, Allen and other interested people,
The Amathinidae is only a recent family. See:
Ponder W. F. (1987)The anatomy and relationships of the pyramidellacean
gastropod Amathina tricarinata. Asian Marine Biology 4, pp. 1-34.
The arrangement propsed by Ponder is also reflected in Vaught (1988). The
family Amathinidae holds a whole assortment of shell shapes, from those
cap-shaped Amathina, to shells you would place in the Pyramidellidae at
first glance
regards
Patty
Dr. Patty Jansen
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