Nitzschia kurzeana

Rabenh. 1873      Category: Nitzschioid

REPORTED AS: Nitzschia obtusa (Krammer and Lange-Bertalot, 1988, plate 17, fig.1) | Nitzschia obtusa var. multistriata (Hohn 1966, p. 489; pl. 2, fig. 7) 

Nitzschia innominata


Nitzschia liebethruthii

LM scalebar = 10 µm = 40 pixels.


Contributor: Sarah Spaulding - November 2010
Length Range: 67-95 µm
Width Range: 6.5-8.5 µm
Striae in 10 µm: 25-40


Valves are linear elongate with distal ends curved to opposite sides, with a slight to moderate sigmoid shape. Terminal ends are bluntly rounded. The raphe is located in a canal and positioned near the valve margin. The raphe is slightly indented toward the central valve at mid-valve. Valve at widest point is greater near the ends than in the central valve, and ranges from 7.5 to 8.5 µm. Fibulae are irregularly spaced, 6.5-8 in 10 µm. The terminal raphe fissures are distinctly recurved. The distal raphe ends terminate internally in a helictoglossa. Note that striae are not resolvable in the specimens examined, and the range of 25-40 striae in 10 µm is an estimate.

Kociolek (2004) notes that this name is not included in VanLandingham’s (1978) catalog, and that reference is given to N. kurzii Rabenhorst ex Cleve & Möller #78. Based on the International Code of Botanical Nomenclature (ICBN) (McNeill et al. 2012), the name N. kurzeana is validly published.

Original Description

Author: Rabenh. 1873
Length Range: 66.7-95.2 µm
Width Range: 6.8-8.3 µm
Striae in 10 µm: 16-20

Original Description

N. magna, leviter sigmoidea, utroque polo obtusa, nodulis lateralibus magnis. 1 in 0,0001 m. m; valvis late linearibus, ad polos rotundato – subcapitatos cuneatis, striis transversalibus subtilissimis.

Original Images

Cite This Page:
Spaulding, S. (2010). Nitzschia kurzeana. In Diatoms of the United States. Retrieved April 21, 2018, from

Species: Nitzschia kurzeana

Contributor: Sarah Spaulding

Reviewer: Kalina Manoylov


Hohn, M.H. (1966). Bacillariophyta. In: Patrick, R. et al., 1966. The Catherwood Foundation Peruvian-Amazon Expedition. XVII. Monographs of the Academy of Natural Sciences of Philadelphia 14:459-495.

Kociolek, J.P. (2004). Annotated listing of diatom types in Rabenhorst’s Die Algen Europa’s 1848-1882, and a consideration of their nomeclatural status. Proceedings of the California Academy of Sciences 55(13): 255-299.

McNeill J., Barrie, F.R., Buck, R., Demoulin, V., Greuter, W., Hawksworth, D.L., Herendeen, P.S., Knapp, S., Marhold, K., Prado, J., Prud'homme Van Reine, W.F., Smith, G.F., Wiersema, J.H. (2012). International Code of Nomenclature for algae, fungi, and plants (Melbourne Code) . Regnum Vegetabile 154. ISBN 978-3-87429-425-6.

Rabenhorst, L. (1873). Die Algen Europa’s. Decas 232-233.

Van Landingham, S.L. (1978). Catalogue of the Fossil and Recent Genera and Species of Diatoms and Their Synonyms. Part VI. Neidium through Rhoicosigma. J. Cramer, Vadus. pp. 2964-3605.

Links & ID's

Index Nominum Algarum (INA)

California Academy of Sciences (CAS)

Nitzschia kurzeana CAS

North American Diatom Ecological Database (NADED)

NADED ID: 48604

Autecology Discussion

Collections from North America that correspond to the original description of N. kurzeana include material from from Hillsboro Canal, Southern Florida, NAWQA Sample GS027503 (ANSP GC103574a).