21171 - Premium Grade Soft Bodied Xiphosurid (Horseshoe Crab Ancestor) Lower Ordovician KemKem_Beds_Fish_Assemblage REPTILIA Linnaeus

REPTILIA Linnaeus

Cheirurina

The scales of many of this teleost fish have a wonderful preservation due to its extreme robustness

conical with blunt apices

Many pieces were collected on the surface or buried a few cm deep

21171 - Premium Grade Soft Bodied Xiphosurid (Horseshoe Crab Ancestor) Lower Ordovician KemKem_Beds_Fish_Assemblage REPTILIA LinnaeusXiphosurans 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