21141 - Premium Grade Soft Bodied Xiphosurid (Horseshoe Crab Ancestor) Lower Ordovician Miscellaneous echinoderms Enchodus subaequilateralis

Enchodus subaequilateralis

absolutely conical and with a blunt tip

• Cretaceous of Bolivia (1)

12 dentary teeth

a partial skeleton

21141 - Premium Grade Soft Bodied Xiphosurid (Horseshoe Crab Ancestor) Lower Ordovician Miscellaneous echinoderms Enchodus subaequilateralisXiphosurans 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