Hannaea R.M.Patrick in R.M.Patrick & Reimer; 1966; 131
Key references
Patrick R., Reimer C.W. 1966. The Diatoms of the United States. Exclusive of Alaska and Hawaii. Volume 1. Fragilariaceae, Eunotiaceae, Achnanthaceae, Naviculaceae. Monographs of the Academy of Natural Sciences of Philadelphia 13. 688 pp; 64 pls.
Bixby R.J., Jahn R. 2005. Hannaea arcus (Ehrenberg) R. M. Patrick: Lectotypification and nomenclatural history. Diatom Research. 20(2): 219-226.
Morphology
Frustules curved, almost linear, with protracted apices and a small bulbous swelling at the centre on the concave side, rectangular in girdle view.
Frustules isovalvar, isopolar; bilaterally asymmetrical, usually lying in valve view because of their curvature; girdle fairly narrow.
Striae uniseriate, parallel (relative to the overall curvature of the cell), ghost striae in the central area; small spines may be present between the striae at the junction of valve face and mantle; an area of densely packed small pores (apical pore field) is present at each pole; a rimoportula is present at one or both poles, lateral to the sternum (axial area).
Axial area narrow. A prominent central area, hollow on the inside, is present, but only on the ventral (concave) side of the cell.
Girdle composed of several narrow bands.
One chloroplast per cell, containing a prominent pyrenoid located in and next to the hollow of the central area on the ventral side.
Frustules isovalvar, isopolar; bilaterally asymmetrical, usually lying in valve view because of their curvature; girdle fairly narrow.
Striae uniseriate, parallel (relative to the overall curvature of the cell), ghost striae in the central area; small spines may be present between the striae at the junction of valve face and mantle; an area of densely packed small pores (apical pore field) is present at each pole; a rimoportula is present at one or both poles, lateral to the sternum (axial area).
Axial area narrow. A prominent central area, hollow on the inside, is present, but only on the ventral (concave) side of the cell.
Girdle composed of several narrow bands.
One chloroplast per cell, containing a prominent pyrenoid located in and next to the hollow of the central area on the ventral side.
Literature
References are given in chronological order.
Reference |
Citation |
|---|---|
| Patrick R., Reimer C.W. 1966. The Diatoms of the United States. Exclusive of Alaska and Hawaii. Volume 1. Fragilariaceae, Eunotiaceae, Achnanthaceae, Naviculaceae. Monographs of the Academy of Natural Sciences of Philadelphia 13. 688 pp; 64 pls. | Illustrations; Morphology; Description; Taxonomy; |
| Bixby R.J., Jahn R. 2005. Hannaea arcus (Ehrenberg) R. M. Patrick: Lectotypification and nomenclatural history. Diatom Research. 20(2): 219-226. | Taxonomy; Type Illustration; Morphology |
| Van de Vijver B., Ector L. 2020. Lectotypification of Ceratoneis amphioxys Rabenhorst (Fragilariaceae, Bacillariophyta). Notulae algarum. 135: 23 April 2020. | Morphology; Taxonomy; Type Illustration |
This page should be cited as:
Mann D. G. Hannaea R.M.Patrick in R.M.Patrick & Reimer; 1966; 131. 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=3889. [Accessed:
].
Image Gallery
Record last modified: 27/12/2020