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Lorica consists of one piece and in cross section the dorsal sulcus is "V" shaped. There are four spine-like projections at the anterior and which also bears very small spines.
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Ribadelago de Franco, Castille and Leon, Spain
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Ribadelago de Franco, Castille and Leon, Spain
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Ribadelago, Castille and Leon, Spain
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San Martin De Castaneda, Castille and Leon, Spain
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Lagostelle, Galicia, Espaa
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Vigo, Castille and Leon, Spain
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Cuelgamuros, Madrid, Spain
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Vitoria, Basque Country, Spain
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Ribadelago de Franco, Castille and Leon, Spain
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Miranda do Douro, Bragana, Portugal
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Lumbreras, La Rioja, Spain
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Head region
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Posterior region
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Body size 200-400 micron. Lorica smooth or faintly striped. Foot opening tube-shaped. Body very broad and flat. Median anterior spines long, more or less curved. Posterior spines present short or long.
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Under favourable temperature conditions its abundance appeared to be closely related to that of Asterionella formosa.
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The body is short, plump, and arched dorsally. Two small teeth are located dorsally at the anterior margin of the lorica. The posterior end is broad and rounded, and the head sheath is marked off from the body. The toes are curved inwards, towards the body. Each toe has two wide-based substyles. The trophi are highly asymmatrical, the left manubrium and ramus are greatly developed, but the right manubrium is thin and small.
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The foot goes out from ventral zone.
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The mastax has malleate trophi.
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Madrid, Madrid, Spain
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Ribadelago, Castille and Leon, Spain
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Ribadelago, Castille and Leon, Spain
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Length 80-150 micron.
