Rhoicosphenia abbreviata (C. Agardh) Lange-Bertalot; 1980; 586
Key references
Levkov Z., Caput Mihalic K., Ector, L. 2010. A taxonomic study of Rhoicosphenia Grunow (Bacillariophyceae). Fottea. 10(2): 145-200.
Morphology
Shape
Valves clavate with rounded head and foot poles, frustules curved in girdle view.
Symmetry
Heteropolar, heterovalvar.
Striae
Parallel, more densely spaced towards the head pole.
Axial area
Narrow, linear, widening slightly towards the valve centre.
Central area
Indistinct or small, elliptic.
Raphe
On the concave valve raphe straight, with straight, expanded proximal ends externally, hooked proximal ends internally, and hooked terminal fissures; on the convex valve short raphe slits at the two poles with expanded proximal ends, distal ends straight or slightly undulating, terminating on the mantle.
SEM morphology
Uniseriate striae with apically elongated or slit-like external areola openings, internal areola openings occluded.
Pore field with large porelli at the foot pole.
Two large pseudo-septa at the head and foot poles.
Valves clavate with rounded head and foot poles, frustules curved in girdle view.
Symmetry
Heteropolar, heterovalvar.
Striae
Parallel, more densely spaced towards the head pole.
Axial area
Narrow, linear, widening slightly towards the valve centre.
Central area
Indistinct or small, elliptic.
Raphe
On the concave valve raphe straight, with straight, expanded proximal ends externally, hooked proximal ends internally, and hooked terminal fissures; on the convex valve short raphe slits at the two poles with expanded proximal ends, distal ends straight or slightly undulating, terminating on the mantle.
SEM morphology
Uniseriate striae with apically elongated or slit-like external areola openings, internal areola openings occluded.
Pore field with large porelli at the foot pole.
Two large pseudo-septa at the head and foot poles.
Literature
References are given in chronological order.
Reference |
Citation |
|---|---|
| Lange-Bertalot H. 1980. Ein Beitrag zur Revision der Gattungen Rhoicosphenia Grun., Gomphonema C. Ag., Gomphoneis Cl. Botaniska Notiser. 133: 585-594. | Morphology; Taxonomy; Illustrations |
| Mann D.G. 1982. Structure, life history and systematics of Rhoicosphenia (Bacillariophyta). I. The vegetative cell of Rh. curvata. Journal of Phycology. 18(1): 162-176. | Morphology; Illustrations |
| Levkov Z., Caput Mihalic K., Ector, L. 2010. A taxonomic study of Rhoicosphenia Grunow (Bacillariophyceae). Fottea. 10(2): 145-200. | Morphology; Illustrations; Ecology; |
This page should be cited as:
Jüttner I. Rhoicosphenia abbreviata (C. Agardh) Lange-Bertalot; 1980; 586. In: Jüttner I., Carter C., Cox E.J., Ector L., Jones V., Kelly M.G., Kennedy B., Mann D.G., Turner J. A., Van de Vijver B., Wetzel C.E., Williams D.M..
Freshwater Diatom Flora of Britain and Ireland. Amgueddfa Cymru - National Museum Wales. Available online at https://naturalhistory.museumwales.ac.uk/diatoms/browsespecies.php?-recid=3372. [Accessed:
].
Image Gallery
Record last modified: 13/04/2021