Geissleria punctifera
(Hustedt) Metzeltin, Lange-Bertalot and García-Rodríguez 2005 Category: Symmetrical biraphid
BASIONYM: Navicula punctifera Hustedt 1952
REPORTED AS: Navicula aikenensis (Patrick 1959) | Geissleria aikenesis ((Patrick) Torgan and Oliveira 2001) | Geissleria schmidiae (Lange-Bertalot and Rumrich in Rumrich et al. 2000)
LM scalebar = 10 µm = 80 pixels.
Observations
Contributor: Marina Potapova - December 2010
Length Range: 16-27 µm
Width Range: 6.0-8.5 µm
Striae in 10 µm: 16-18
Description
Valves are lanceolate with subrostrate broadly rounded ends, 6.0-8.5 µm wide and 16-27 µm long. The raphe is straight and filiform. The axial area is narrow and linear. The central area is small, formed by one shortened stria on each side of the valve, with an isolated stigma. Striae are uniseriate, radiate, 16-18 in 10 µm. Areolae are apically elongated, 65-70 in 10 µm. Subpolar areolae, or annulae, are larger than areolae on other parts of the valve. The annulae form three rows at each pole.
Original Description
Basionym: Navicula punctifera
Author: Hustedt 1952
Length Range: 15-23 µm
Width Range: 6-9 µm
Striae in 10 µm: 16-18
Original Description
Valvae elliptico-lanceolatae apicibus obtuse rostratis, 15— 23 μ longae, 6—9 μ latae. Rhaphe directa, area axialis anguste linearis, area centralis parva, rotundata vel irregulariter dilatata. Striae transapicales radiantes, 16—18 in 10 μ, in media parte interdum striis brevioribus intercalatis, delicatissime lineolatae vel punctatae. Area centralis uno latere cum poro singulo.
Original Images
Cite This Page:
Potapova, M. (2010). Geissleria punctifera. In Diatoms of the United States. Retrieved May 19, 2013, from http://westerndiatoms.colorado.edu/taxa/species/geissleria_punctifera
Species: Geissleria punctifera
Contributor: Marina Potapova
- Valves lanceolate with broadly subrostrate apices
- Central area formed by one shortened stria at each side
- One isolated areola in central area
- Annulae in three rows at poles
Valves are lanceolate with subrostrate broadly rounded ends, 6.0-8.5 µm wide and 16-27 µm long. The central area is small, formed by one shortened stria on each side of the valve, with an isolated stigma. Striae are radiate, 16-18 in 10 µm. The annulae form three rows at each pole.
Compare
Geissleria punctifera differs from G. lateropunctata by lanceolate valves with broadly subrostrate apices. Valves of G. punctifera are wider, elliptical-lanceolate, with narrowly rostrate or subrostrate apices . G. punctifera has one isolated areola in the central area, while G. lateropunctata has one to five isolated areolae.
Geissleria lateropunctata
Citations
Hustedt, F. (1952). Neue und wenig bekannte Diatomeen. IV. Botaniska Notiser 1952:366-410.
Patrick, R.M. (1959). New species and nomenclatural changes in the genus Navicula (Bacillariophyceae). Proceedings of the Academy of Natural Sciences of Philadelphia, 111, 91-108.
Rumrich, U., Lange-Bertalot, H. and Rumrich, M. (2000). Diatoms of the Andes. From Venezuela to Patagonia/Tierra del Fuego and two additional contributions. Lange-Bertalot, H. (ed.), Iconographia Diatomologica. Annotated Diatom Micrographs. Vol. 9. Phytogeography-Diversity-Taxonomy. Koeltz Scientific Books, Königstein, Germany, 9:673 pp.
Torgan, L.C. and Oliveira, M.A. . (2001). Geissleria aikenensis (Patrick) Torgan et Oliveira comb. nov.: morphological and ecological characteristics. Economou-Amilli, A. (ed.) Proceedings of the 16th International Diatom Symposium, Athens, University of Athens, p.115-121.
Links & ID's
Index Nominum Algarum (INA)
California Academy of Sciences (CAS)
North American Diatom Ecological Database (NADED)
NADED ID: 210013