|Size under dissecting microscope: 160-170µm
Size under compound microscope: 150-160µm
Pump EPR 1999-2000: Common
Pump EPR 2004: Common
Trap EPR 2004-2005: Common
Unknown 5 looks very much like this species, though it is about 10µm larger. It has a distinct flare to the aperture rim, which is wider than that of Unknown A. The easiest way to distinguish them quickly is to roll them; Unknown A will generally roll to expose the aperture, while Unknown 5 is stable on its side, as shown at left.
Lepetodrilus spp. is about 10µm larger than Unknown A. It has pitted sculpture rather than reticulate and is also stable on its side.
Gastropods by Size
Gastropods by Species