Two new species of Gondwanaspis (Trilobita, Odontopleurida) from the Givetian-Frasnian transition of the northern Rhenish Massif (Germany)

Abstract The cosmopolitan genus Gondwanaspis is one of two post-Taghanic (late Givetian to Frasnian) odontopleurid genera and the only Odontopleurida surviving Lower Kellwasser Event, finally disappearing at Upper Event. Although it known from Frasnian Australia, Germany, France, Morocco, Russia, findings are comparatively rare. Here we present eisbornensis n. sp. probable lower Beul section near Eisborn (northern Sauerland) schloesseri possibly top-Givetian strata Hofermühle South Quarry Bergisches Land (Velbert Anticline), both in northern Rhenish Massif. represents few species which cephalon pygidium known, while holotype G . largest specimens within genus.