Diatoms of North AmericaDiatoms of North America
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Compare Urosolenia eriensis

(H.L.Sm.) Round and R.M.Crawford 1990

Compare

Acanthoceras zachariasii has two processes on each valve. Urosolenia longiseta has a long calyptra, with "teeth" and a longer seta, so that the calyptra and seta together can be longer than the frustule. Urosolenia eriensis var. morsa has a higher density of girdle bands.

LM scalebar = 10 µm
Urosolenia Eriensis Lm2 Urosolenia Eriensis Lm3B Urosolenia Eriensis Lm7B Urosolenia Eriensis Lm8 Urosolenia Eriensis Lm9 Urosolenia Eriensis Lm6
Diameter
5-10 µm

Acanthoceras zachariasii

(Brun) Simonsen 1979

Acanthoceras zachariasii LM7 Acanthoceras zachariasii LM1 Acanthoceras zachariasii LM2 Acanthoceras zachariasii LM3 Acanthoceras zachariasii LM5 Acanthoceras zachariasii LM4 Acanthoceras zachariasii LM6
Diameter
11.9-23.0 µm

Also compare to

Urosolenia longiseta

(O.Zacharias) Edlund and Stoemer 1993

Urosolenia eriensis var. morsa

(W.West et G.S.West) Bukht. 1995