| Resumo: |
A new genus, Urnalana, is established for Leucosia species with an urn-shaped carapace: L. angulata Rathbun, 1911, L. chevretii Haswell, 1880, L. cumingii Bell, 1855, L. elata A. Milne Edwards, 1874, L. elatoides Bouvier, 1915, L. hilaris Nobili, 1905, L. haematostica Adams & White, 1849, L. insularis Takeda & Kurata, 1976, L. margaritata A. Milne Edwards, 1874, L. pulchella Bell, 1855, L. purarensis Ovaere, 1987, L. thysanotus George & Clark, 1976, L. whitei Bell, 1855, and three new species: U. elatula, U. granulimera, and U. parahaematostica. The species are described or redescribed and illustrated, extended synonymies are given, and a key for their identification is provided.
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