These include productid brachiopods and the ichnofossil
Zoophycos (known as Spirophyton in the earlier literature, e.g.
Above the ichnofossil
bed is a 2-m-thick mudstone (Fig.
assemblages throughout the section indicate the Skolithos ichnofacies (presence of Ophiomorpha, Skolithos and Diplocraterion, see Buatois and Mangano 2011 for a review) with some ichnogenera of the Cruziana ichnofacies (presence of Rosselia, and Asterosoma).
might be ascribed to following four ichnogenera, known in the Guata Group: Gordia, Helminthopsis, Palaeophycus and Planolites (Fernandes et al., 2002; Netto et al., 2012)
Type repository: the type specimen and the relative ichnofossil
will be deposited in the Museo de Historia Natural "Gustavo Orces V.", Escuela Politecnica Nacional, Quito, Ecuador.
Mikulas (1991, 1998) ranged the ichnofossil
assemblages, though with some reservations, to a transition from the Cruziana to the Zoophycos ichnofacies.
Bipezia bilobata likely represents the remains of a plant stem or root that has been cast in sediment rather than an ichnofossil
; Matthew's other, unillustrated, specimen of Bipezia bilobata (NBMG 3037) shows that the bilobate impressions do not represent an ichnofossil
but are broken fragments of shale that superficially resemble the type specimen.
assemblages from the Nama Group (Neoproterozoic-Lower Cambrian) in Namibia and the Proterozoic-Cambrian boundary problem revisited.
Scolicia prisca de Quatrefages from the Paleogene of eastern Jamaica and fossil echinoids of the Richmond Formation.
record of inferred phoronids dates back to the Devonian (as Talpina, Bromley 2004).