North Africa, Morocco, Anti-Atlas Mountains, Late Devonian, ca. 382 to 372 million years ago. An extremely rare and fascinating fossilized fragment from an armored fish skull with two goniatites resting naturally alongside in a large stone matrix- a special opportunity to acquire a specimen like this! The large skull section belongs to a Placoderm armored fish and displays the main thoracic shield / dorsal plate portion! The fossilized shells beside the fish's remains are Goniatite cephalopods (ammonoid like mollusks) that also inhabited the waters of the Devonian. A Placoderm from North Africa preserved in a large matrix with two related cephalopod fossils which it was entombed with, in such excellent condition- is remarkable! In the stone surrounding the main fossils, you can see Orthoceras fossils scattered throughout the host limestone matrix! Size (stone matrix): 11.5" L x 11.5" W (29.2 cm x 29.2 cm); (skull): 5" Diameter (12.7 cm)
Pneumatic tools and professional lab acid bath preparation has yielded the amazing detail on the Placoderm skull. Like all concretion fossils, they must be broken to see if there are any fossils inside and this specimen is no different. Fortunately, it has only a single fracture running through the skull that required no restoration or crack filling, further offering visual assurance of the 100% natural condition of the skull.
From a single plate it is difficult to determine a species, but there are scientific papers published on Placoderm from this region that could assist in researching further. Placoderm is a class of armored prehistoric fish, known from fossils, which lived from the Silurian to the end of the Devonian period. Their head and thorax were covered by articulated armored plates and the rest of the body was scaled or naked, depending on the species. Placoderms were among the first jawed fish. The first identifiable placoderms appear in the fossil record during the late Llandovery epoch of the early Silurian. The various groups of placoderms were diverse and abundant during the Devonian but became extinct at the end-Devonian Hangenberg event 358.9 million years ago. During the Devonian, placoderms went on to inhabit and dominate almost all known aquatic ecosystems, both freshwater and saltwater, but this diversity ultimately suffered many casualties during the extinction event at the Frasnian-Famennian boundary, the Late Devonian extinctions. The remaining species then died out during the Devonian/Carboniferous extinction event. Not a single placoderm species has been confirmed to have survived into the Carboniferous.
Provenance: ex-private French Collection, formed in the 1990s
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#170566
Condition
Professionally excavated and prepared. A single fissure break line running through the center of skull fossil, repaired with no restoration. 100% original fossil material and no restoration to the other fossils.