Слайд 4Corumbella werneri (latest Ediacaran; Brazil, Paraguay and Nevada, USA). A, possible
gregarious specimens (all incomplete) from the Tamengo Formation of Brazil; B, micro-CT scan of a portion of a Corumbella exoskeleton, showing multiple small fractures; C, reconstruction of the periderm of a solitary polyp in its original life orientation and with its apical region embedded in bottom sediment (figure drawn by P. Busana and modified from Pacheco et al. 2011); D, detail of C, highlighting the sulcate midline and nonsulcate corners. Both scale bars represent 1 mm.