21140 - Soft Bodied Aglaspid (Tremaglaspis) + Xiphosurid (Horseshoe Crab Ancestor) Lower Ordovician Dyrosaurus phosphaticus This specimen is perfect to
Yard notes & kiln story
Description
This specimen is perfect to practice its surface cleaning and discover its wonderful ornamentation
dental formula: 2 premaxillary
They similar features are acquired independently in different species because probably they had similar feeding methods
Upchurch et al
Germany (11)
21140 - Soft Bodied Aglaspid (Tremaglaspis) + Xiphosurid (Horseshoe Crab Ancestor) Lower Ordovician Dyrosaurus phosphaticus This specimen is perfect toXiphosurans 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