21183 - Premium Grade Soft Bodied Xiphosurid (Horseshoe Crab Ancestor) Lower Ordovician Mimagoniatites Maastrichtian of illulemedden bassin

Maastrichtian of illulemedden bassin

• Silurian of Canada ( Northwest Territories

Beautiful tooth in jaw bone

Petrographic description:

This tooth was broken during the initial collecting efforts but all parts were put back together with some filled sectors

21183 - Premium Grade Soft Bodied Xiphosurid (Horseshoe Crab Ancestor) Lower Ordovician Mimagoniatites Maastrichtian of illulemedden bassinXiphosurans are an order of arthropods related to arachnids, or, according to one recent study, actually arachnids. They are sometimes called horseshoe crabs (a name applied more specifically to the only extant family, Limulidae). They first appeared in the Tremadocian (Lower Ordovician) from Fezouata Fm in South Morocco. Currently, there are only four living species. They are members of the order Xiphosura, which contains two suborders, Xiphosurida