Diatoms of North AmericaDiatoms of North America
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Compare Geissleria punctifera

(Hust.) Metzeltin, Lange-Bert. and García-Rodríguez 2005

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Geissleria punctifera differs from G. lateropunctata by lanceolate valves with broadly subrostrate apices. Valves of G. punctifera are wider, elliptical-lanceolate, with narrowly rostrate or subrostrate apices . G. punctifera has one isolated areola in the central area, while G. lateropunctata has one to five isolated areolae.

LM scalebar = 10 µm
Geissleria punctifera LM4 Geissleria punctifera LM2 Geissleria punctifera LM5 Geissleria punctifera LM1 Geissleria punctifera LM3
Length Range
16-27 µm
Width Range
6.0-8.5 µm
Striae in 10 µm
16-18

Geissleria lateropunctata

(J.H.Wallace) Potapova and D.M.Winter 2006

Geissleria lateropunctata LM5 Geissleria lateropunctata LM2 Geissleria lateropunctata LM4 Geissleria lateropunctata LM3 Geissleria lateropunctata LM1
Length Range
15-25 µm
Width Range
7-9 µm
Striae in 10 µm
18-22