Geissleria lateropunctata

(J.H.Wallace) Potapova and D.M.Winter 2006      Category: Symmetrical biraphid
BASIONYM: Navicula lateropunctata J.H.Wallace 1960

REPORTED AS: Geissleria neotropica (Metzeltin and Lange-Bertalot 1998 ) 

Geissleria kriegeri


Geissleria punctifera

LM scalebar = 10 µm = 80 pixels.


Contributor: Marina Potapova - December 2010
Length Range: 15-25 µm
Width Range: 7-9 µm
Striae in 10 µm: 18-22


Valves are elliptical-lanceolate, often slightly dorsiventral, with narrowly rostrate or subrostrate ends, 7.0-9.0 µm wide and 15-25 µm long. The raphe is straight and filiform. The axial area is narrow and linear. The central area is small, with one to five isolated areolae. Striae are uniseriate, radiate, 18-22 in 10 µm. Areolae are apically elongated, 65-70 in 10 µm. Subpolar areolae, or annulae, are larger than areolae on other parts of the valve. The annulae form three-four rows at each pole.

Original Description

Basionym: Navicula lateropunctata
Author: J.H.Wallace 1960
Length Range: 17-22 µm
Width Range: 8 µm
Striae in 10 µm: 22-24

Original Description

Valve late ellipticus, 17-22 µ longis, 8 µ latis, subpole valde constrictus, apicibus subcapitatus, striis subradiantibus, 22-24 in 10 µ, punctum solitarium unilateral prope nodulum cebtrales manifestum.

Original Images

Original text and images reproduced with permission by Academy of Natural Sciences of Philadelphia.

Cite This Page:
Potapova, M. (2010). Geissleria lateropunctata. In Diatoms of the United States. Retrieved April 21, 2018, from

Species: Geissleria lateropunctata

Contributor: Marina Potapova

Reviewer: Sam Rushforth


Potapova, M. and Winter, D. (2006). Use of nonparametric multiplicative regression for modeling diatom habitat: a case study of three Geissleria species from North America. In: Advances in Phycological Studies (N. Ognjanova-Rumenov and K. Manyolov, eds). Pensoft Publishers, Sofia-Moscow pp. 319-332.

Wallace, J. (1960). New and variable diatoms. Notulae Naturae 331: 1-8.

Links & ID's

Index Nominum Algarum (INA)

California Academy of Sciences (CAS)

Geissleria lateropunctata CAS

North American Diatom Ecological Database (NADED)

NADED ID: 210012

Autecology Discussion


A cell of G. lateropuctata

Credit/Source: M. Potapova