21165 - Premium Grade Soft Bodied Xiphosurid (Horseshoe Crab Ancestor) Lower Ordovician KemKem_Sawfish It is a kind of

It is a kind of Pine Cone that was not known until very recently

Pyroxene crystals show complex zoning patterns

This is a piece worth of advanced collectors

Inside we can see fossilized and polished Orthoceras

Otarion listron

21165 - Premium Grade Soft Bodied Xiphosurid (Horseshoe Crab Ancestor) Lower Ordovician KemKem_Sawfish It is a kind ofXiphosurans 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