However, a further detailed study based on shell morphology (e.g. shell equivalve;
subcylindrical; ventral margin straight or slightly arcuate; umbones nearly terminal;
shell dark brown; internally, the shell is usually pearly, purple above and white below
the umbonal keel; periostracum shining and hairy in younger specimens) ultimately
resulted in the molluscs being identified as Xenostrobus securis.