Gomphosphenia lingulatiformis
(Lange-Bertalot & Reichardt) Lange-Bertalot 1995 Category: Asymmetrical biraphid
BASIONYM: Gomphonema lingulatiforme Lange-Bertalot & Reichardt in Lange-Bertalot 1993
LM scalebar = 10 µm = 80 pixels.
Observations
Contributor: Pat Kociolek - September 2011
Length Range: 12-50 µm
Width Range: 5.5-7.0 µm
Striae in 10 µm: 14-18
Description
Valves at the higher end of the size range are linear-clavate with undulate margins, while smaller valves are clavate with smooth margins. The headpole is narrowly rounded to nearly acute and the footpole is narrowly rounded. The axial area is lanceolate, narrow at the poles, and expanded towards the center. Stigmata are absent. The raphe is straight, filiform, and the external proximal raphe ends are dilated. The central nodule is distinct and round. The striae are formed by a single areola, with an additional 1-2 isolated areolae towards the axial area. The striae are radiate, becoming parallel near the footpoles. Septa and pseudosepta are absent.
Original Description
Basionym: Gomphonema lingulatiforme
Author: Lange-Bertalot & Reichardt in Lange-Bertalot 1993
Length Range: µm
Striae in 10 µm:
Original Description
Original Images
Cite This Page:
Kociolek, P. (2011). Gomphosphenia lingulatiformis. In Diatoms of the United States. Retrieved June 20, 2013, from http://westerndiatoms.colorado.edu/taxa/species/gomphosphenia_lingulatiformis1
Species: Gomphosphenia lingulatiformis
Contributor: Pat Kociolek
Reviewer: Marina Potapova
Image Credit: Pat Kociolek
- Valves linear-clavate to clavate
- Axial area lanceolate
- Central nodule distinct
Valves are linear-clavate to clavate. The headpole is narrowly rounded to nearly acute and the footpole is narrowly rounded. The axial area is lanceolate. Stigmata are absent. The central nodule is distinct and round. The striae are formed by a single areola, with an additional 1-2 isolated areolae towards the axial area. The striae are radiate, becoming parallel near the footpoles.
Compare
Gomphosphenia lingulatiformis is more linear than Gomphosphenia grovei (M. Schmidt) Lange-Bertalot.
Gomphosphenia grovei
Citations
Kociolek, J.P. and Kingston, J.C. (1999). Taxonomy, ultrastructure, and distribution of some gomphonemoid diatoms (Bacillariophyceae: Gomphonemataceae) from rivers in the United States. Canadian Journal of Botany 77: 686-705. 10.1139/cjb-77-5-686
Kociolek, J.P., Yang, J.-R. and Stoermer, E.F. (1988). Taxonomy, ultrastructure and systematic position of the Gomphonema grovei M. Schm.-species complex (Bacillariophyceae). Nova Hedwigia 47: 145-158.
Lange-Bertalot, H. (1993). 85 Neue taxa und uber 100 weitere neu definierte Taxa erganzend zur Subwasserflora von Mittleuropa. Bibliotheca Diatomologica 27, 454 p. Cramer, Berlin, Stuttgart.
Lange-Bertalot, H. (1995). Gomphosphenia paradoxa nov. spec. et nov. gen. und Vorschlag zur Lösung taxonomischer Probleme infolge eines veränderten Gattungskonzepts von Gomphonema (Bacillariophyceae). Nova Hedwigia, Vol:60[1-2], 241-252 .
Links & ID's
Index Nominum Algarum (INA)
California Academy of Sciences (CAS)
Gomphosphenia lingulatiformis CAS
North American Diatom Ecological Database (NADED)
NADED ID: 209003