O primeiro registro do icnogênero taotieichnus na supersequência santa maria (za hyperodapedon, triássico superior, RS)

Abstract

The study of invertebrate trace in continental environments is a relatively new area in Ichnology. Insects are producers of bone bioerosion in continental environments, such as bone perforations found since the Middle Triassic. However, other types of bioerosions remain with scarce reports. In the Santa Maria Supersequence (ZA Hyperodapedon, Upper Triassic, Rio Grande do Sul) traces associated with insect activities related to bone bioerosion have already been found. In this study, we report the first record of the ichnogenus Taotieichnus for the Upper Triassic, since the ichnotaxon until then had only been recorded for the Chinese Jurassic and Brazilian Pleistocene. As the specimen trait reported here is very similar to Taotieichnus orientalis, but has significant differences in the shape of its branches, we point to a possible new ichnospecies for the Taotieichnus ichnogenus.