Type specimens of Aplysiida (Gastropoda, Heterobranchia) in the Academy of Natural Sciences of Philadelphia, with taxonomic remarks

Abstract

The type specimens of 15 nominal species of Aplysiida (Gastropoda, Heterobranchia) at the Academy of Natural Sciences of Philadelphia are listed and their primary types are illustrated. Type materials described by the following authors are present: Henry A. Pilsbry (9 names), Angelo Heilprin (2), Charles N. E. Eliot (1), William H. Pease (2) and Elizabeth J. Letson (1). Some taxonomic notes are provided. Aplysia perviridis (Pilsbry, 1895), comb. nov., Aplysia pilsbryi (Letson, 1898), and Aplysia pulmonica Gould, 1852 are reinstated as valid.