Maxillæ, with the edge square and straight: caudal appendages uniarticulate: filamentary appendages, none. [Please select]
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In three genera, the presence of filamentary appendages on the animal's body is generic; in Pollicipes, however, they are found only on three out of the six species. [Please select]
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In this species, moreover, the filamentary appendages are developed to a greater extent than in any other cirripede; in most genera, the surface of the body and of the sack suffices for respiration. [Please select]
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