Cloudinids (Cloudinia) are an extinct animal phylum that formed small Late Proterozoic[?] tubelike or conical fossils consisting of "cup-in cup" segments of calceraecous material.
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... with its impressive Iguaçu[?] falls, the Rio Negro, São Francisco[?], Xingu, Madeira and the Tapajós[?] rivers.
Situated along the equator, Brazil's climate is ...