Diatoms of North AmericaDiatoms of North America
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Compare Encyonopsis perborealis

Krammer 1997

Compare

Encyonopsis bobmarshallensis and E. kutenaiorum have more linear valves, lower stria density, and larger central areas. Encyonopsis moseri is similar in size and shape but has only 23-25 striae in 10 µm. Encyonopsis perborealis can be distinguished from other small Encyonopsis species by its broadly rounded apices, from species of Achnanthidium by its biraphid frustules, and from other small naviculoid taxa by its asymmetric valves.

LM scalebar = 10 µm
Encyonopsis Perborealis1 Encyonopsis Perborealis2 Encyonopsis Perborealis3 Encyonopsis Perborealis4 Encyonopsis Perborealis5 Encyonopsis Perborealis6 Encyonopsis Perborealis7
Length Range
9.7-18.6 µm
Width Range
2.5-3.8 µm
Striae in 10 µm
26-30

Encyonopsis bobmarshallensis

Bahls 2013

Encyonopsis Moseri1 Encyonopsis Moseri2 Encyonopsis Moseri3 Encyonopsis Moseri4 Encyonopsis Moseri5 Encyonopsis Moseri6 Encyonopsis Moseri7
Length Range
8.7-18.7 µm
Width Range
2.7-3.6 µm
Striae in 10 µm
22-24

Encyonopsis kutenaiorum

Bahls 2013

Encyonopsiskutenai 1 Encyonopsiskutenai 2 Encyonopsiskutenai 3 Encyonopsiskutenai 4 Encyonopsiskutenai 5 Encyonopsiskutenai 6 Encyonopsiskutenai 7
Length Range
16.5-21.2 µm
Width Range
3.2-3.5 µm
Striae in 10 µm
23-26

Also compare to

Encyonopsis moseri

Krammer and Lange-Bert. in Krammer 1997