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Tintinnomorphs is a term used for the grouping of palynomorphs resembling organic remains of tintinnids, which are not always identifiable as true lorica, cysts or pouch, being able to correspond to other protozoans and may even represent others structures of distinct organisms, such as rotifers and turbellarians. This paper presents tintinnomorphs recorded in Holocene sediments of the well PSC-03, drilled in the Coastal Plain of Santa Catarina, southern Brazil. A total of six tintinnomorphs types is described and illustrated (SPHERO-1, ELELNO-14, ESABNO-6, HEXANO-2, RECTNO-1, AROBNO-3), some of which are compared with specimens previously reported from Quaternary deposits of southern Brazil, southern South America and other regions of the world. Although tintinomorphs are associated to marine palynomorphs, they cannot be used as a conclusive paleoenvironmental evidence due to uncertainties about their biological affinity.

revista brasileira de paleontologia

New Insights on the systematic classification of certain palynological taxa (tintinnomorphs) from Holocene deposits of the Coastal Plain of Southern Brazil