21136 - Premium Grade Soft Bodied Xiphosurid (Horseshoe Crab Ancestor) + Thoralicystis echinoderm Fezouata Bronzati et al

Bronzati et al

No fractures or restoration

The trident shaped appendage has been considered in functional morphology as a sensitive functionality to find food between the seabed substrate

It is formed by biological and physical processes

History: (H

21136 - Premium Grade Soft Bodied Xiphosurid (Horseshoe Crab Ancestor) + Thoralicystis echinoderm Fezouata Bronzati et alXiphosurans 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