Halamphora subturgida (Hustedt) Levkov; 2009; 231
Synonymy
Amphora subturgida Hustedt 1937
Key references
Sala S.E., Sar E.A., Hinz F., Sunesen I. 2006. Studies on Amphora subgenus Halamphora (Bacillariophyta): the revision of some species described by Hustedt using type material. European Journal of Phycology. 41: 155-167.
Morphology
Size
Length 12.6-21.6 µm, width 2.6-3.7 µm, frustule width 7 µm (UK population); length 15-25 µm, width 3-4.5 µm, frustule width 7-11 µm (Levkov 2009).
Shape
Valves semi-lanceolate with convex dorsal and straight to slightly convex ventral margin; valve ends protracted, capitate, slightly ventrally bent.
Symmetry
Isopolar, dorsiventral.
Striae
Striae on dorsal side slightly radiate to radiate, 23-25 in 10 µm (UK population), 18-24 in 10 µm (Levkov 2009), areolae on dorsal side discernible; a row of round to slightly elongate areolae near ventral margin, 22-34 in 10 µm (Levkov 2009).
Axial area
Axial area moderately broad, predominantly expressed on ventral side.
Central area
No central area on dorsal side, indistinguishable from axial area on ventral side.
Raphe
Raphe branches arched with slightly dorsally deflected proximal raphe ends.
Length 12.6-21.6 µm, width 2.6-3.7 µm, frustule width 7 µm (UK population); length 15-25 µm, width 3-4.5 µm, frustule width 7-11 µm (Levkov 2009).
Shape
Valves semi-lanceolate with convex dorsal and straight to slightly convex ventral margin; valve ends protracted, capitate, slightly ventrally bent.
Symmetry
Isopolar, dorsiventral.
Striae
Striae on dorsal side slightly radiate to radiate, 23-25 in 10 µm (UK population), 18-24 in 10 µm (Levkov 2009), areolae on dorsal side discernible; a row of round to slightly elongate areolae near ventral margin, 22-34 in 10 µm (Levkov 2009).
Axial area
Axial area moderately broad, predominantly expressed on ventral side.
Central area
No central area on dorsal side, indistinguishable from axial area on ventral side.
Raphe
Raphe branches arched with slightly dorsally deflected proximal raphe ends.
Literature
References are given in chronological order.
Reference |
Citation |
|---|---|
| Hustedt F. 1937. Systematische und ökologische Untersuchungen über die Diatomeen-Flora von Java, Bali und Sumatra nach dem Material der Deutschen Limnologischen Sunda-Expedition. 'Tropische Binnengewässer, Vol. VII'. Archiv für Hydrobiologie, Supplement. 15: 393-506. | Morphology; Description; Taxonomy; Illustrations |
| Sala S.E., Sar E.A., Hinz F., Sunesen I. 2006. Studies on Amphora subgenus Halamphora (Bacillariophyta): the revision of some species described by Hustedt using type material. European Journal of Phycology. 41: 155-167. | Morphology; Taxonomy; Type Illustration; Description |
| Levkov Z. 2009. Amphora sensu lato. Lange-Bertalot H. (ed.) Diatoms of Europe: Diatoms of the European Inland Waters and Comparable Habitats. Vol. 5., A.R.G. Gantner Verlag K.G., Ruggell. 916 pp | Morphology; Taxonomy; Illustrations |
Similar Species
Similar species not published on this website:
Halamphora rugosa (Hustedt) Levkov; 2009; 218
This page should be cited as:
Jüttner I., Van de Vijver B., Williams D. M. Halamphora subturgida (Hustedt) Levkov; 2009; 231. 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=4037. [Accessed:
].
Image Gallery
Record last modified: 21/01/2025