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Lauderia borealis syn Lauderia annulata

Note that the cells are slightly concave and on the ends and the cell walls, although thin, are finely striated. Sometimes found with prominent intercalary bands between cells. Size 40um wide, 40um long, total volume 50265.49. Collected in October 2002 in plankton tow from the
Patuxent River. Common late summer and fall species in the lower Chesapeake Bay area.

Diatoms2