Fricke 1904 Category: Asymmetrical biraphid
BASIONYM: Gomphonema manubrium Fricke in Schmidt et al. 1904
Valves are lanceolate-clavate, with an inflated central valve. The valve tapers from the center to a rounded headpole. The valve markedly tapers from the center to a narrow footpole. The axial area is lanceolate. A single stigma is present. The raphe is lateral, except at the proximal and distal raphe ends. Proximal raphe ends curve toward the stigma. Striae are parallel to weakly radiate at the center valve. Striae are parallel at the headpole and radiate at the footpole. A distinct porefield is present at the footpole.
Basionym: Gomphonema manubrium
Author: Fricke in Schmidt et al. 1904
Length Range: µm
Striae in 10 µm:
Kociolek, J.P. and Kingston, J.C. (1999). Taxonomy, ultrastructure, and distribution of some gomphonemoid diatoms (Bacillariophyceae: Gomphonemataceae) from rivers in the United States. Canadian Journal of Botany 77: 686-705. 10.1139/cjb-77-5-686
Kociolek, J.P. and Stoermer, E.F. (1991). Taxonomy and ultrastructure of some Gomphonema and Gomphoneis taxa from the Upper Laurentian Great Lakes. Canadian Journal of Botany 69: 1557-1576. 10.1139/b91-200
Schmidt, A. (-). (1874-1959). Atlas der Diatomaceen-Kunde, von Adolf Schmidt, continued by Martin Schmidt, Friedrich Fricke, Heinrich Heiden, Otto Muller, Friedrich Hustedt. Reprint 1984, Koeltz Scientific Books, Konigstein, 480 plates.
Thomas, E.W., Kociolek, J.P., Lowe, R.L. and Johansen, J.R. (2009). Taxonomy, ultrastructure and distribution of gomphonemoid diatoms (Bacillariophyceae) from Great Smoky Mountains National Park (U.S.A.). Nova Hedwigia, Beiheft 135: 201-237.