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Capsaspora
''Capsaspora'' is a monotypic genus containing the single species ''Capsaspora owczarzaki'', a single-celled eukaryote which is a symbiont in the haemolymph of the tropical freshwater snail ''Biomphalaria glabrata''. The genome of ''C. owczarzaki'' has been sequenced.〔http://www.broadinstitute.org/annotation/genome/multicellularity_project/MultiHome.html〕 ==Description== ''C. owczarzaki'' cells were described as 3 to 5 μm amoebas with a nucleus ⅓ - ½ of the diameter of the cell (containing a central nucleolus), long unbranched pseudopodia, mitochondria with flattened cristae, numerous phagosomes, lipid vacuoles, glycogen granules and a Golgi apparatus. Cells could encyst in response to crowding, generating 4 to 5 μm cysts with a double wall: the outer thin, irregular and loosely attached; and the inner thicker, smooth.〔Sebe-PedrosA. 2013. The origin of metazoan multicellularity, a genomic and functionalapproach. PhD UB, Facultat de Biologia, Departament de Genètica〕
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