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Los Limites, La Rioja, Spain
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Melgar de Tera, Castille and Leon, Spain
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Lorica vase-shaped and thin. Foot long, toes shorter than rest of body.
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Soba, Cantabria, Spain
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It is caracterised by a round tail and short toes.
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Madrid, Madrid, Spain
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Ribadelago de Franco, Castille and Leon, Spain
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Segmented, moderately rigid foot. Two posterior and two anterio-median spines
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Alcala De Guadaira, Andalusia, Spain
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Lardero, La Rioja, Espaa
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The species are omnivorous, frequently feeding upon bacteria, debris and small protozoans.
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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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Lenght 200 micron
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Ribadelago, Castille and Leon, Spain
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Lagostelle, Galicia, Espaa
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Vigo, 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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Posterior region
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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.