Diatoms of North AmericaDiatoms of North America
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Compare Geissleria lateropunctata

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

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Geissleria lateropunctata differs from G. punctifera by elliptical-lanceolate valves with narrowly rostrate or subrostrate apices. Valves of G. punctifera are more narrow, lanceolate, with broadly subrostrate apices. G. lateropunctata has one to five isolated areolae in central area while G. punctifera has one isolated areola. G. kriegeri is smaller and has no isolated areolae in central area.

LM scalebar = 10 µm
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

Geissleria punctifera

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

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 kriegeri

(Krasske) Lange-Bert. in Lange-Bert. and Metzeltin 1996

Geissleria kreigeri LM1 Geissleria kreigeri LM2 Geissleria kreigeri LM6 Geissleria kreigeri LM5 Geissleria kreigeri LM4 Geissleria kreigeri LM3
Length Range
11-23 µm
Width Range
5.0-7.5 µm
Striae in 10 µm
16-23