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Ribadelago de Franco, Castilla y Len, Espaa
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Trefacio, Castille and Leon, Spain
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Muelas del Pan, Castille and Leon, Spain
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Lorica almost circular, dorso-ventrally compressed and convex in cross-section. Anterior dorsal margin rounded. Foot-opening nearly circular, located in the middle or behind the middle region of lorica on the ventral side. Lorica lenght 120-200 micron.
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Madrid, Madrid, Spain
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Ribadelago de Franco, Castille and Leon, Spain
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This is a bdelloid rotifer (metazoa), body with an exoskeleton usually in elements that will telescope, posterior end often with two podites (like gastrotrichs to which they are probably related). Very common in aquatic habitats especially those which are prone to dry out - like moss, soils and the contents of pitcher plants. They can resist drying because they can form cysts, but some species are known to be cryptobiotic - that is they can dry out completely, and the organisms can come back to life when wetted. Usually eat bacteria or suspended protists, using the cilia of the corona at the front end of the body to sweep particles into the front of the body where an armoured mastax or jawed pharynx helps to grind the food. Rotifers are common members of the microbial communities of many aquatic ecosystems. Although they are multiceullar animals, they may be only be 100 microns long, and so overlap in size with ciliates. They can be confused with ciliates because they use cilia to capture their food. However, they can be distinguished because they have an exoskeleton, usually two posterior toes, and a tough pharyngeal region just behind the head. Hendrik Seegers says this is probably a non-contracted Lecane because of the toes which appear to bear claws and the more or less regular lower half of the body, below the constriction. Phase contrast.
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Diurella rousseleti Voigt. Side view of retracted specimen.
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Elosa worrallii Lord, dorsal view, after Lord.
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Rattulus carinatus Lamarck. Dorsal view.
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Phuripong Meksuwan, Pornsilp Pholpunthin, Hendrik Segers
Zookeys
Figure 2.A, B Collotheca ferox (A dorsal view B ventral view) C–F Collotheca orchidacea sp. n. (C, E frontal D, F dorsal). Scale bars: A–F = 100 µm (A, B by Rapeepan Jaturapruek).
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Galende, Castilla y Len, Espaa
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Soba, Cantabria, Spain
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Galende, Castille and Leon, Spain
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Lardero, La Rioja, Espaa
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San Martin De Castaneda, Castille and Leon, Spain
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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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Mahide, Castille and Leon, Spain
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Covaleda, Castille and Leon, Spain
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Madrid, Madrid, Spain
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Lumbreras, La Rioja, Spain
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Ribadelago de Franco, Castille and Leon, Spain