Diatoms of North AmericaDiatoms of North America
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Compare Aulacoseira pseudoamericana

(Camburn) Siver and Kling 1997

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Aulacoseira perglabra has ornamentations on the valve face, with areolae that extend onto the mantle. Both species have robust spines that are visible in LM, but A. perglabra has a distinct buttress that extends from the base of the spines deep into the mantle.

LM scalebar = 10 µm
Aulacoseira pseudoamericana LM7 Aulacoseira pseudoamericana LM1 Aulacoseira pseudoamericana LM4 Aulacoseira pseudoamericana LM6 Aulacoseira pseudoamericana LM2 Aulacoseira pseudoamericana LM5 Aulacoseira pseudoamericana LM3
Diameter
5.7-10.5 µm
Width Range
3.3-5.3 µm
Striae in 10 µm
18-24 on valve margin

Also compare to

Aulacoseira perglabra

BioData Reference
Krammer and Lange-Bertalot 2/3 Pl 33 Fig 12-17