Stauroforma (H. Lange-Bertalot) R.J. Flower, V.J. Jones & F.E. Round ; 1996; 53
Key references
Flower R.J., Jones V.J., Round F.E. 1996. The distribution and classification of problematic Fragilaria (virescens v.) exigua Grun./Fragilaria exiguiformis (Grun.) Lange-Bertalot: a new species or a new genus?. Diatom Research. 11(1):; 41-57.
Morphology
Valves linear-lanceolate, lanceolate or lanceolate-elliptic, valve ends sometimes slightly protracted. Frustules form ribbon-like colonies.
Isopolar, bilaterally symmetrical.
Stria parallel to radiate, placed opposite each other, with round areola openings.
Spines on the virgae at the valve face/mantle junction can be present or missing.
A very small axial area can be present or missing.
Virgae are thickened internally.
A group of porelli form two small apical pore fields, or they are reduced or missing.
The cingulum consists of 3-4 open girdle bands and a large valvocopula.
Isopolar, bilaterally symmetrical.
Stria parallel to radiate, placed opposite each other, with round areola openings.
Spines on the virgae at the valve face/mantle junction can be present or missing.
A very small axial area can be present or missing.
Virgae are thickened internally.
A group of porelli form two small apical pore fields, or they are reduced or missing.
The cingulum consists of 3-4 open girdle bands and a large valvocopula.
Literature
References are given in chronological order.
Reference |
Citation |
|---|---|
| Flower R.J., Jones V.J., Round F.E. 1996. The distribution and classification of problematic Fragilaria (virescens v.) exigua Grun./Fragilaria exiguiformis (Grun.) Lange-Bertalot: a new species or a new genus?. Diatom Research. 11(1):; 41-57. | Morphology; Taxonomy; Description; Illustrations; |
This page should be cited as:
Flower R., Jones V., Jüttner I. Stauroforma (H. Lange-Bertalot) R.J. Flower, V.J. Jones & F.E. Round ; 1996; 53. 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=4116. [Accessed:
].
Image Gallery
Record last modified: 27/12/2020