Insights into VSM diversity and Neoproterozoic biostratigraphy in the light of recent Brazilian discoveries

Vase-shaped microfossils occur in dolostone clasts within conglomerates, breccias and diamictites of the Neoproterozoic Urucum Formation, Jacadigo Group, SW Brazil. Although their taphonomic history is distinct from those of other VSM assemblages, morphometric comparison of Urucum fossils with five others described previously from North America and Europe show that two of the Urucum species --- the long-necked Limeta lageniformis Morais, Fairchild and Lahr, 2017 and the funnel-necked Palaeoamphora urucumense Morais et al., 2017 occur in the Kwagunt and Callison Lake assemblages, as does Pakupaku kabin Riedman, Porter and Calver, 2017 recently described from the Togari Group, Tasmania. Obelix rootsii Cohen, Irvine and Strauss, 2017a (new combination), previously known only from the Callison Lake Formation, is documented here from the Kwagunt Formation. In addition, Trigonocyrillium horodyskii (Bloeser, 1985) and Bonniea dacruchares Porter, Meisterfeld and Knoll 2003, first described f...