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      Redescription of Pterygoplichthys punctatus and description of a new species of Pterygoplichthys (Siluriformes: Loricariidae)

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          Abstract

          Pterygoplichthys punctatus and P. weberi, new species, are unique among hypostomines in having a medially divided buccal papilla. The two species can be separated from one another by color (small spots in P. punctatus, large in P. weberi), condition of the buccal papilla (deeply divided at all ages in P. punctatus vs. shallowly divided in adults of P. weberi), condition of the lateral keel odontodes (fairly short and directed posteriorly in P. punctatus vs. large and directed almost laterally in P. weberi), and body width (SL/cleithral width 3.6-4.0 in P. punctatus vs. 3.3-3.4 in P. weberi). Pterygoplichthys punctatus is known from the rio Madeira drainage and the rio Urubu of Brazil and has published, but unconfirmed localities in the rio Purus and rio Tocantins basin, and P. weberi is known from the Río Marañon, Río Ucayali, and upper Río Amazonas drainages of Colombia, Ecuador, and Peru.

          Translated abstract

          Pterygoplichthys punctatus e P. weberi, espécie nova, são únicos entre os hipostomíneos por possuirem uma papila bucal dividida medialmente. As duas espécies podem ser separadas entre si pela coloração (pequenos pontos em P. punctatus, pontos grandes em P. weberi), condição da papila bucal (profundamente dividida em jovens e adultos de P. punctatus vs. dividida superficialmente em adultos de P. weberi), condição da quilha de odontódios laterais (pequena e dirigida posteriormente em P. punctatus vs. grande e dirigida quase lateralmente em P. weberi), e largura do corpo (comprimento padrão/largura no cleitro 3.6-4.0 em P. punctatus vs. 3.3-3.4 em P. weberi). Pterygoplichthys punctatus é conhecida da drenagem do rio Madeira e do rio Urubu no Brasil and tem sido citada, porém sem confirmação, para localidades nas bacias dos rio Purus e Tocantins, e P. weberi é conhecida do río Marañon, río Ucayali, e drenagens do alto río Amazonas na Colômbia, Ecuador e Peru.

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          Most cited references 9

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          The Neotropical cascudinhos: systematics and biogeography of the Otocinclus catfishes (Siluriformes: Loricariidae)

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            The Genus Hypostomus Lacépède, 1803, and its Surinam representatives (Siluriformes, Loricariidae)

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              Essays on the history of Neotropical Dipterology, with special reference to collectors (1750–1905)

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Journal
                ni
                Neotropical Ichthyology
                Neotrop. ichthyol.
                Sociedade Brasileira de Ictiologia (Maringá )
                1982-0224
                December 2006
                : 4
                : 4
                : 401-410
                Affiliations
                [1 ] Auburn University United States
                [2 ] Florida Museum of Natural History United States
                Article
                S1679-62252006000400003
                10.1590/S1679-62252006000400003
                Product
                Product Information: website
                Categories
                ZOOLOGY

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