White Miniature Ark
Acar domingensis [not Landmarck 1819]
The White Miniature Ark is relatively rare on S. Hutchinson Island beaches.
White Miniature Ark (S. Hutchinson Island- February 2021)
According to Harry Lee: "The "authors" [see above label] to whom I refer, of whom there are too many to iterate, are the ones who misidentified the shell in your latest group photo (ID'ed by me as a White Miniature Ark) as Lamarck's species. Here is the story on this situation: <http://www.jaxshells.org/lat12.htm>. You may recall we touched on the subject earlier, when I ID'ed your [real] Barbatia domingensis (Lamarck, 1819) Red-brown Ark."
Huber (2015, P. 367-368) determined that the type material of Arca domingensis Lamarck, 1819 represents the species that had been usually treated as Barbatia cancellaria (Lamarck, 1819) in the literature. He argued that because Arca cancellaria Lamarck, 1819 does not have a type locality and bears doubtful type material, use of Arca domingensis is preferred, even though it upsets prevailing usage. Moreover, the correct name for the large, whitish, Caribbean species of Acar that had been previously identified as Acar domingensis (Lamarck, 1819) is currently unresolved.
Huber, M., 2015. Compendium of Bivalves 2. A Full-Color Guide to the Remaining Seven Families. A Systematic Listing of 8'500 Bivalve Species and 10'500 Synonyms. ConchBooks, Hackenheim, Germany. 907 pp., incl. numerous color figs + CD-ROM. May.