Tabularia fasciculata
(Agardh) Williams and Round 1986 Category: Araphid
BASIONYM: Diatoma fasciculata C. Agardh 1812
SYNONYM(S): Fragilaria fasciculata (C. Agardh) Lange-Bertalot 1980 | Echinella fasciculata (Agardh) Jurgens 1816-1822 | Ctenophora pulchella var. fasciculata (Agardh ex specim., Kützing) Schonfeldt 1907
LM scalebar = 10 µm = 40 pixels.
Observations
Contributor: Pat Kociolek - March 2011
Length Range: 34-100 µm
Width Range: 4.5-6.0 µm
Striae in 10 µm: 12-15
Description
Valves are linear-lanceolate to lanceolate, with some specimens slightly or even distinctly asymmetric to the transapical axis, although this is not characteristic of the species. The apices are set off slightly and rounded but not capitate. The axial area is very broad and the width can be variable within populations. No central area is evident. The length:breadth ratio is also variable, even in this more restricted sense of the species (as compared to the interpretation of Krammer and Lange-Bertalot 1991). Striae are costate, areolae are not visible in the LM. Both apices appear to have small pore fields.
Patrick (in Patrick and Reimer 1996, p. 141) gives a detailed review of the nomenclature of this species.
Original Description
Basionym: Diatoma fasciculata
Author: C. Agardh 1812
Length Range: µm
Striae in 10 µm:
Original Description
Original Images
Cite This Page:
Kociolek, P. (2011). Tabularia fasciculata. In Diatoms of the United States. Retrieved May 21, 2013, from http://westerndiatoms.colorado.edu/taxa/species/tabularia_fasciculata
Species: Tabularia fasciculata
Contributor: Pat Kociolek
Reviewer: Rex Lowe
Image Credit: Pat Kociolek
- Valves linear-lanceolate to lanceolate
- Axial area very broad
- Distinct central area not evident
- Striae costate
Valves are linear-lanceolate to lanceolate. The apices are set off slightly, rounded but not capitate. The axial area is very broad. No central area is evident. Striae are costate.
Compare
This species is distinguished by its broad axial area without a distinct central area and costate striae. Patrick (in Patrick and Reimer 1996) illustrate and describe an evident rimoportula (“jelly pore”) at one end, but that is not evident in all populations.
Citations
Krammer, K. and Lange-Bertalot, H. (1991). Bacillariophyceae. 3. Teil: Centrales, Fragilariaceae, Eunotiaceae. . In Ettl, H., Gerloff, J., Heynig, H. & Mollenhauer, D. (Eds.). Süsswasserflora von Mitteleuropa. 2(3): 1-576. Gustav Fisher Verlag, Stuttgart, Germany.
Patrick, R.M. and Reimer, C.W. (1966). The Diatoms of the United States exclusive of Alaska and Hawaii, V. 1. Monographs of the Academy of Natural Sciences of Philadelphia 13.
Williams, D.M. and Round, F.E. (1987). Revision of the genus Fragilaria. Diatom Research 2: 267-288.
Links & ID's
Index Nominum Algarum (INA)
California Academy of Sciences (CAS)
North American Diatom Ecological Database (NADED)
NADED ID: 200002