Work found, with species-group names introduced therein:
Heilprin, [A.] 1887a. A new species of Aplysia. Proceedings of the Academy of Natural Sciences of Philadelphia 38 364. [Stated date: 21 Dec 1886; true date: 25 Jan 1887.] Aplysia willcoxi, see Aplysia fasciata Poiret, 1789