OK this is a quite common ordovician Brittle star from Morocco, but....
we called it "the LAST Touch".
Not only the fossils but also the fossilization makes this slab GREAT...
What you are seeing was the last touch before beign buried.
This Fossils comes from a well known trilobite locality called  El.Kaid Errami, in Morocco. Ophiurids were an early group of echinoderms and they were largely widespread during ordovician period.
 
Geocoma corinata
Ordovician
Ktaoua Formation
El Kaid Errami
Morocco