Orthocerida
Order of molluscs
Nº Q2325800 ★★★
Rare · Nature
Orthocerida
Order of molluscs
Orthocerida, from Ancient Greek ὀρθός (orthós), meaning "straight", and κέρας (kéras), meaning "horn", also known as the Michelinocerida, is an order of extinct orthoceratoid cephalopods that lived from the Early Ordovician to the Late Permian. While there has been some possible Late Triassic records for the order, although they have been reclassified as pseudorthocerids.
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Texte en anglais Pas encore d'article dans ta langue : extrait en anglais.
Orthocerida, from Ancient Greek ὀρθός (orthós), meaning "straight", and κέρας (kéras), meaning "horn", also known as the Michelinocerida, is an order of extinct orthoceratoid cephalopods that lived from the Early Ordovician to the Late Permian. While there has been some possible Late Triassic records for the order, although they have been reclassified as pseudorthocerids. The Eocene fossil Antarcticeras is sometimes considered a descendant of the orthocerids although this is disputed. They were most common however from the Ordovician to the Devonian. A fossil found in the Caucasus was previously assigned to Orthocerida, extending the range to the Early Cretaceous, but has since been reassigned to the order Mixosiphonata.
Texte : Wikipédia en anglais, CC BY-SA 4.0. · Image : Alberto Salguero (CC BY-SA 4.0) ·
