Actinoptychus senarius syn. Actinocyclus senarius, Actinoptychus undulatus

Size 53um diameter, 9um height, total volume19855.65. Temp. range 25.0 to 27.17, salinity 7.8 to 11.6. Collected in plankton tow from the Patuxent River in October 2002.

Diatoms