Gomphonema brasiliense
Grunow 1878 Category: Asymmetrical biraphid
BASIONYM: Gomphonema brasiliense Grunow 1878
LM scalebar = 10 µm = 40 pixels.
Observations
Contributor: Pat Kociolek - September 2011
Length Range: 23-65 µm
Width Range: 5.5-9.0 µm
Striae in 10 µm: 13-15
Description
Valves are lanceolate-clavate, with the headpole being rounded to narrowly acute and the footpole is narrowly rounded. The axial area is narrow at the poles, expanded to produce a lanceolate hyaline area running the length of the valve. The central area is not differentiated. The central nodule is distinct and round in shape. The raphe is straight and filiform. The raphe ends do not extend to the valve apices at either end. Striae are short, radiate along the length of the valve, with each stria comprised of a single elongated areola. Stigmata, septa and pseudosepta are lacking.
Original Description
Basionym: Gomphonema brasiliense
Author: Grunow 1878
Length Range: µm
Striae in 10 µm:
Original Description
Original Images
Cite This Page:
Kociolek, P. (2011). Gomphonema brasiliense. In Diatoms of the United States. Retrieved May 24, 2013, from http://westerndiatoms.colorado.edu/taxa/species/gomphonema_brasiliense
Species: Gomphonema brasiliense
Contributor: Pat Kociolek
Reviewer: Marina Potapova
Image Credit: Pat Kociolek
- Valves are lanceolate-clavate
- The axial area is expanded to produce a lanceolate hyaline area
- The central nodule is distinct and round in shape
- Stria are comprised of a single elongated areola
Valves are lanceolate-clavate, with the headpole rounded to narrowly acute. The axial area is expanded to produce a lanceolate hyaline area running the length of the valve. The central nodule is distinct and round in shape. Striae are short, radiate along the length of the valve, with each stria comprised of a single elongated areola.
Compare
Gomphonema brasiliense is comparatively longer and broader than G. lingulateformis. It is more linear in the shape of the valve as compared to G. grovei.
Gomphosphenia grovei
Gomphosphenia lingulatiformis
Citations
Grunow, A. (1878). Algen und Diatomaceen aus dem Kaspischen Meere. In: O. Schneider (ed.), Naturwissenschafte Beiträge zur Kenntniss der Kaukasusländer, auf Grund seiner Sammelbeute. Dresden, pp. 98-132, pls. 3-4.
Patrick, R.M. and Reimer, C.W. (1975). The Diatoms of the United States, exclusive of Alaska and Hawaii, V. 2. Monographs of the Academy of Natural Sciences of Philadelphia 13.
Links & ID's
Index Nominum Algarum (INA)
California Academy of Sciences (CAS)
North American Diatom Ecological Database (NADED)
NADED ID: