Naviculonema Graeff, Kociolek & S.R. Rushforth, 2013

GRAEFF, C. L., KOCIOLEK, J. P. & RUSHFORTH, S. R., 2013, New and Interesting Diatoms (Bacillariophyta) from Blue Lake Warm Springs, Tooele County, Utah, Phytotaxa 153 (1), pp. 1-38 : 14

Naviculonema Graeff, Kociolek & S.R. Rushforth , gen. nov.

Generitype:— Naviculonema stagnora, Graeff, Kociolek & S.R. Rushforth , sp. nov.

Valves linear-elliptical, axial area narrow, striae around the central area more coarse than others and not infrequently having the terminal areola isolated from others in the stria. Raphe filiform, straight, with external proximal ends dilated slightly and distal raphe ends deflected ventrally. Striae distinctly punctate, composed of areolae with siliceous flaps that give the openings a C or lunate shape. Internally the areolae are rounded. Distally the raphe ends form small helictoglossae. Isolated areolae in the central area do not perforate the valve.