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Al)(SiO4)(Si2O7)O(OH)
Its exact identification is complicated because only with it it is possible to confuse it as belonging to a small theropod or a crocodile
Its type locality is Beg'aa
Precious association of 3 Squalicorax pristodontus (Crow Shark) from the phosphate deposits of the Ouled Abdoun Basin (Morocco)
21155 - Premium Grade Soft Bodied Xiphosurid (Horseshoe Crab Ancestor) Lower Ordovician Calamites Al)(SiO4)(Si2O7)O(OH)Xiphosurans 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
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