Melosira (Melosira sp.)
Centric diatom. Planktonic (floater)
Kingdom: Plantae; Division Chrysophyta; Class Bacillariophyceae; Order Centrales; Family Coscinodiscaceae. White scale bar is 5 microns
Cells closely united to more straight, beadlike chains by the middle of the valve faces. Frustules globose, elliptical or cylindrical. Valves circular, often deeply convex and possessing a deep valve mantle, often with "small teeth" or short spines at the unction of the frustules, which are united into a filament. Valve surface either simple punctate or punctate an areolate, punctate usually in radiating lines or fascicules, often somewhat irregularly scattered in the center.