Onnia Moroccan Trilobite with Occipital Spine

Onnia aff superba

Trilobites Order Asaphida, Family Trinucleidae

Geological Time: Ordovician

Size (25.4 mm = 1 inch): Trilobite is 23 mm long by 19 mm wide (with spines) on a 75 by 60 mm matrix

Fossil Site: Blekos, Morocco

Fossil Code: 13122

Price: $165.00


Description: This fine plaque houses a fine trilobite called Onnia superba. In all likelihood it is unnamed. In the past trilobites from Morocco were taken to Europe where they often were assigned names of local species. For the sake of argument let us call this Onnia aff superba until such trilobites can be sorted out.. There are many fine details evident such as the pitted cephalic ring by which the trilobites fed. They presumably swam along just above the seafloor, using their legs to kick up suspended matter into their filter chamber with the water existing dorsally through the fenestrae (pits, Latin for windows). Notice also the occipital spine prepared freestanding. To see an example with all spines prepared freestanding see my other offerings.

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