Gomphonema sphaerophorum

Ehrenberg 1845      Category: Asymmetrical biraphid
BASIONYM: Gomphonema sphaerophorum Ehrenberg 1845
SYNONYM(S): Gomphonema  augur var. sphaerophorum Lange-Bertalot | Gomphoneis  sphaerophorum Tempère and Peragallo 

Gomphonema sierrianum

 

Gomphonema stoermeri

LM scalebar = 10 µm = 40 pixels.



Observations

Contributor: Meredith Tyree | Ian Bishop - January 2016
Length Range: 37-56 µm
Width Range: 12.8-13.2 µm
Striae in 10 µm: 12-16

Description

Valves are clavate with a distinctly capitate headpole and a narrow footpole. Axial area is narrow, becoming linear-lanceolate in smaller specimens. Central area is transversally elliptic and incomplete. A stigma is present opposite a single shortened stria. The raphe is undulate and lateral. Striae are nearly parallel mid-valve, becoming radiate at the apices. Areolae are distinctly punctate and visible in LM, measuring 25-27 in 10 µm. A distinct porefield is present at the footpole.



Original Description

Basionym: Gomphonema sphaerophorum
Author: Ehrenberg 1845
Length Range: µm
Striae in 10 µm:

Original Description

  1. ___________ sphaerophorum: G. parvum, testula subtiliter striata a dorso clavata, mucrone apicis capitato (sphaerophoro). Longitudo testulae 1/58”’. Vivum in Niagara, fossile ad Farmington.

Original Images


Cite This Page:
Tyree, M., and Bishop, I. (2016). Gomphonema sphaerophorum. In Diatoms of the United States. Retrieved October 19, 2017, from http://westerndiatoms.colorado.edu/taxa/species/gomphonema_augur_var._sphaerophorum

Species: Gomphonema sphaerophorum

Contributor: Meredith Tyree | Ian Bishop

Reviewer: Sarah Spaulding

Citations

Ehrenberg, C.G. (1845). Vorläufige zweite Mettheilung über die weitere Erkenntnifs der Beziehungen des kleinsten organischen Lebens zu den vulkanischen Massen der Erde. Bericht über die zur Bekanntmachung geeigneten Verhandlungen der Königlich-Preussischen Akademie der Wissenschaften zu Berlin 1845:133-157.

Kociolek, J.P. and Stoermer, E.F. (1991). Taxonomy and ultrastructure of some Gomphonema and Gomphoneis taxa from the Upper Laurentian Great Lakes. Canadian Journal of Botany 69: 1557-1576. 10.1139/b91-200

Links & ID's

Index Nominum Algarum (INA)

INA

California Academy of Sciences (CAS)

Gomphonema sphaerophorum CAS

North American Diatom Ecological Database (NADED)

NADED ID: 37056

Autecology Discussion