21142 - Premium Grade Soft Bodied 2 Xiphosurids (Horseshoe Crab Ancestor) Lower Ordovician Cut & Polished Ammonites It has some glued and

It has some glued and tiny restored (filled) fractures

Cephalopoda - Ammonitida - Cleoniceratidae

Samples (polished thin-sections) also were studied under scanning electron microscope (Research Technical Services – UA)

It is typical of some levels of the Upper Fezouata Formation

Top rare mosasaur species

21142 - Premium Grade Soft Bodied 2 Xiphosurids (Horseshoe Crab Ancestor) Lower Ordovician Cut & Polished Ammonites It has some glued andXiphosurans 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