The coastal plain of Paraná originated in the Quaternary Period from cyclical movements of transgression and marine regression from the Holocene climatic oscillations. The sediments of the coastal plain present dates that vary from Pleistocene to Holocene. Along the coast of Paraná, several points are found that present deposits of biodetritic gravel, with great accumulation of fossiliferous material coming from this geologic period, among them shark teeth. The site chosen for collecting the fossilized teeth was in the gravel bank located in front of the Farol Island, located in the Amores Beach, in the municipality of Matinhos, Paraná. In total, 563 fossilized shark teeth were found, from six different species of two families. These data are very important to better understand this past biodiversity.
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