Unknown peltospirid 240µm. Family ?Peltospiridae

unknown peltospirid 240Ámunknown peltospirid 240Ám aperture

Size under dissecting microscope: 230-240µm
Size under compound microscope: 220, 235, 240µm
Morphology:
This is another possibly heterogeneous group of protoconchs. They are slightly larger than the “Peltospira” group and are taller for their diameter, although not as angular as Echinopelta fistulosa . The sculpture begins at the axis of curvature and continues about 2/3 of the way to the aperture, which is slightly flared. The aperture rim is similar in width to Lirapex granularis, wider than in the other peltospirid forms. It may be that the ratio of the diameter to the height will be useful in distinguishing the forms, but we have not had the time to investigate it.

Frequency:
Pump EPR 1999-2000: Frequent (but combined with 210μm size class)
Pump EPR 2004: Frequent
Trap EPR 2004-2005: Occasional


Can be confused with

Unknown neomphalid W
Unknown neomphalid W is quite similar in general appearance and size. The easiest way to distinguish the two is to look at the sculpture - Unknown neomphalid W has reticulate sculpture instead of lineate.
See Notes on peltospirids for links to easily confused peltospirid species

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