Produção Nacional
An isopod from the Codó Formation (Aptian of the Parnaíba Basin), Northeastern Brazil
2013; Sociedade Brasileira de Geologia; Volume: 43; Issue: 1 Linguagem: Inglês
10.5327/z2317-48892013000100003
ISSN2317-4889
AutoresRafael Matos Lindoso, Ismar de Souza Carvalho, Ighor Dienes Mendes,
Tópico(s)Marine and coastal plant biology
ResumoThe Codó Formation is a lithostratigraphic unit with predominant carbonate sedimentation of the Aptian age situated in the intracratonic Parnaíba Basin.In this formation, the only known crustaceans were conchostracans and ostracods.Systematic collections conducted in the Brejo city, in the Maranhão State, have provided new taxa for the cited lithostratigraphic unit.A new genus and species of isopod is described with the following set of features: cephalon elliptical deeply inserted in the first pereionite; eyes located dorsolaterally; body oblong oval; and isomorphic pereionites and pleonites, which indicate an affinity with the family Archaeoniscidae.The presence of this taxon in the limestone deposits from the Codó Formation reinforces prior inference of a lacustrine/marine paleoenvironments, and indicates a greater diversity of aquatic arthropods during the opening of the South Atlantic in the Early Cretaceous.
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