found in the North Atlantic
unknown
none
Geological Time: Quaternary Holocene recent
the drawings are published in the book cited below, author and collection:
View of a specimen of Discorbis orbicularis (Terquem, 1876)
var selseyensis (Heron-Allen and Earland, 1911)
The identification is based upon:
Cushman, J., A., 1931: