A recently discovered graptoloid, Dicellograptus uncatus n.sp., is described from the Blue Mountain Formation of southern Ontario, Canada. This species is characterized by an axial angle of 120–180° and a prominent, hook-shaped virgella. Dicellograptus uncatus n.sp. is Late Ordovician in age and occurs in the Paraclimacograptus manitoulinensis Zone.

You do not currently have access to this article.