Ankistro Desmus wrote:
 
What is the correct genus for disjecta (Perry, 1811)... Bassina or
Callanaitis?
 
Genus Bassina (subgenus Bassina) = species medium to large, sculpture of
thin spaced concentric lamellae on part or all of shell.
Genus Bassina (subgenus Callanaitis) = thin, compressed species
sculpture of strong concentric lamellae over all shell surface.
 
Pretty thin difference that probably wouldnt stand up to too much
scrutiny but in Australia we do use Callanaitis as the subgenus.
 
Kev