Polymorphina fistulosa Williamson, 1858 syn. Polymorphina lactea var. fistulosa of Williamson, Recent Foraminifera of Great Britain, 1858. Printed for the Ray Society.
Status: taxon inquirendum (Probably aberrant fistulose forms of many polymorphinid taxa.)
Ref. WoRMS
Foraminifera.eu gallery of UK species of foraminifera
For more information on forams see - Foraminifera.eu Project