21157 - Premium Grade Soft Bodied Xiphosurid (Horseshoe Crab Ancestor) Lower Ordovician Onnia Environments: marine (66 collections)

Name: 21157 - Premium Grade Soft Bodied Xiphosurid (Horseshoe Crab Ancestor) Lower Ordovician Onnia Environments: marine (66 collections)
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SKU: 41768959425
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Mahogany paper grain — description and returns beneath the overlapping buy card.

Description

Environments: marine (66 collections)

Fossils of the Harrana Fauna and the Adjacent Areas

sand shoal (2)

Calamites goepperti

Class : Reptilia Linnaeus

21157 - Premium Grade Soft Bodied Xiphosurid (Horseshoe Crab Ancestor) Lower Ordovician Onnia Environments: marine (66 collections)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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