The species of Cabiropidae having a Cabirops-type morphology of the mature female (lateral body compression) are reviewed, including members of the genera Cabirops Kossmann, Arcturocheres Hansen, and Bourdonia Rybakov, all of which parasitize isopods. The genus Astacilloechus Hansen is shown to be a synonym of Arcturocheres, and Paradajus Nierstrasz & Brender à Brandis is a synonym of Cabirops. Danalia fraissei Nierstrasz & Brender à Brandis is transferred to Cabirops. A new genus, Rolandoniscus, is erected for Cabirops serratus Bourdon. The rhizocephalan parasite Perezina Nierstrasz & Brender à Brandis is confirmed to belong to Cabiropidae, not Cryptoniscidae. A key to genus-groups, based on female morphology, of the 12 genera within Cabiropidae is provided, as is a key, based on the cryptoniscus stage, to the five genera with Cabirops-type female morphology.

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