(Gregory) Grunow in Cleve & Möller 1877 Category: Asymmetrical biraphid
BASIONYM: Encyonema hebridicum Gregory
SYNONYM(S): Cymbella hebridica Cleve
Contributor: Carrie Graeff - May 2012
Length Range: 29.5-63 µm
Width Range: 8-11 µm
Striae in 10 µm: 9-10 at the center
Valves are moderately dorsiventral with slightly or moderately rostrate, narrowly rounded apices. The dorsal margin is moderately arched. The ventral margin is moderately tumid at the center in larger specimens to convex in smaller specimens. The axial area is narrow. The central area is rounded in larger specimens and indistinct in small specimens. The striae are slightly radiate across most of the valve, except at the apices where they are slightly convergent. Internally, the proximal raphe ends are strongly deflected dorsally.
Basionym: Encyonema hebridicum
Length Range: µm
Striae in 10 µm:
Cleve, P.T. (1894). Synopsis of the Naviculoid Diatoms, Part I. Kongliga Svenska-Vetenskaps Akademiens Handlingar 26(2):1-194, 5 pls.
Krammer, K. (1997). Die cymbelloiden Diatomeen. Eine Monographie der weltweit bekannten Taxa. Teil 2. Encyonema part., Encyonopsis and Cymbellopsis. Bibliotheca Diatomologica 37:1-469.