1st Record: New Haven/CT/Long Island Sound (Perkins 1871; Verrill and Smith 1873); 'The only locality in which I have found this species is an old half-buried wreck near the entrance of the harbour' (Perkins 1871).
South Groton/CT/Fishers Island Sound (1937-1959, Wallour 1960); Fisher's Island/NY/Long Island Sound (1922-1924, (MCZ Malacology 120621, Museum of Comparative Zoology 2012); New London/CT/Long Island Sound (Wallour 1960); New Haven/CT/Long Island Sound (Perkins 1871; Verrill and Smith 1873; Wallour 1960); Bridgeport/CT/Long Island Sound (Wallour 1960); Norwalk/CT/Long Island Sound (Wallour 1960); Fishers Island/NY/Long Island Sound (Wallour 1960); Cold Spring Harbor/NY/Long Island Sound (Balch 1899)
ReferencesBalch, Francis Noyes (1899) List of marine mollusca of Coldspring Harbor, Long Island, with descriptions of one new genus and two new species of nudibranchs, Proceedings of the Boston Society of Natural History 29(7): 133-163
Brown, Dorothy J. (1953) <missing title>, Report No. 8511 William F. Clapp Laboratories, Inc., Duxbury, Massachusetts. Pp. <missing location>
2008-2021 Museum of Comparative Zoology Collections database- Malacology Collection. http://www.mcz.harvard.edu/collections/searchcollections.html
Perkins, George H. (1871) Molluscan fauna of New Haven. A critical review of all the marine, fresh water and land Mollusca of the region, with descriptions of many of the living animals and of two new species. Part II: Acephala and Bryozoa., Proceedings of the Boston Society of Natural History 13: 138-163
Wallour, Dorothy Brown (1960) <missing title>, William F. Clapp Laboratories, Duxbury, Massachusetts. Pp. 1-41