The Valvifera are marine Isopoda .[ Valviferans are distinguished, however, by the flat, valve-like which hinge laterally and fold inward beneath the rear part of their bodies, covering the .]
Families
Twelve families are recognised:
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Antarcturidae Poore, 2001 (17 genera)
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Arcturidae Dana, 1849 (14 genera)
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Arcturididae Poore, 2001 (one genus)
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Austrarcturellidae Poore & Bardsley, 1992 (five genera)
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Chaetiliidae Dana, 1849 (13 genera)
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Holidoteidae Wägele, 1989 (four genera)
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Holognathidae Thomson, 1904 (five genera)
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Idoteidae Samouelle, 1819 (24 genera)
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Pseudidotheidae Ohlin, 1901 (one genus)
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Rectarcturidae Poore, 2001 (four genera)
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Thermoarcturidae Poore, 2015 (three genera)
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Xenarcturidae Sheppard, 1957 (one genus)
