Ulnaria ulna (Nitzsch) Compère; 2001; 100
Synonymy
Bacillaria ulna Nitzsch 1817
Key references
Compère P. 2001. Ulnaria (Kützing) Compère, a new genus name for Fragilaria subgen. Alterasynedra Lange-Bertalot with comments on the typification of Synedra Ehrenberg. Jahn R., Kociolek J.P., Witkowski A., Compère P. (eds) Lange-Bertalot-Festschrift: Studies on Diatoms. Dedicated to Prof. Dr. Dr. h.c. Horst Lange-Bertalot on the occassion of his 65th Birthday. A.R.G. Gantner Verlag. K.G. 97-102 pp
Morphology
Size
Length 80-160 µm, width 6.5-8.5 µm, lectotype: length 230–320 μm, width 6.3–7.7 μm (Lange-Bertalot & Ulrich 2014).
Shape
Valves linear to linear-lanceolate with rostrate ends.
Symmetry
Isopolar, bilaterally symmetrical.
Striae
Parallel, slightly radiate at the valve ends; positioned opposite each other and off-set,
10-12 in 10 µm (UK population); ghost striae can be present.
Axial area
Narrow, linear.
Central area
Round, oval or irregular.
SEM morphology
Uniseriate striae with oval external areola openings which are occluded.
Apical pore fields at both ends.
Small apical spines can be present.
A rimoportula is present at each end.
Length 80-160 µm, width 6.5-8.5 µm, lectotype: length 230–320 μm, width 6.3–7.7 μm (Lange-Bertalot & Ulrich 2014).
Shape
Valves linear to linear-lanceolate with rostrate ends.
Symmetry
Isopolar, bilaterally symmetrical.
Striae
Parallel, slightly radiate at the valve ends; positioned opposite each other and off-set,
10-12 in 10 µm (UK population); ghost striae can be present.
Axial area
Narrow, linear.
Central area
Round, oval or irregular.
SEM morphology
Uniseriate striae with oval external areola openings which are occluded.
Apical pore fields at both ends.
Small apical spines can be present.
A rimoportula is present at each end.
Literature
References are given in chronological order.
Reference |
Citation |
|---|---|
| Nitzsch C.L. 1817. Beitrag zur Infusorienkunde oder Naturbeschreibung der Zerkarien und Bazillarien. 3(1). Neue Schriften der Naturforschenden Gesellschaft zu Halle. 99-104 pp | Description; Morphology |
| Schmidt A. 1874-1959. Atlas der Diatomaceen-Kunde. O.R. Reisland, Leipzig. | Morphology; Illustrations |
| Boyer C. S. 1927. Synopsis of North American Diatomaceae. 78. Proceedings of The Acadamy of Natural Sciences of Philadelphia. 228 pp | Taxonomy |
| Compère P. 2001. Ulnaria (Kützing) Compère, a new genus name for Fragilaria subgen. Alterasynedra Lange-Bertalot with comments on the typification of Synedra Ehrenberg. Jahn R., Kociolek J.P., Witkowski A., Compère P. (eds) Lange-Bertalot-Festschrift: Studies on Diatoms. Dedicated to Prof. Dr. Dr. h.c. Horst Lange-Bertalot on the occassion of his 65th Birthday. A.R.G. Gantner Verlag. K.G. 97-102 pp | Taxonomy; |
| Williams D.M. 2011. Ulnaria: definitions and descriptions - a partial resolution. Diatom Research. 26(1-2): 149-153. | Taxonomy; Morphology |
| Lange-Bertalot H., Ulrich S. 2014. Contributions to the taxonomy of needle-shaped Fragilaria und Ulnaria species. Lauterbornia. 78: 1-73. | Type Illustration; Morphology |
This page should be cited as:
Jüttner I. Ulnaria ulna (Nitzsch) Compère; 2001; 100. 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=2408. [Accessed:
].
Image Gallery
Record last modified: 27/12/2020