Les Cameroceras (par Toymany) existaient pendant l'Ordovicien moyen jusqu'à la période silurienne moyenne, de 470 à 422 m.y.a.

• Contributeur: Brett Zimmerman / Alamy Banque D'Images
• ID de l’image: 2PR00TX
• Taille du fichier: 113,1 MB (6,2 MB Téléchargement compressé)
• Autorisations: Modèle - non | Propriété - non
• Dimensions: 7699 x 5133 px | 65,2 x 43,5 cm | 25,7 x 17,1 inches | 300dpi
• Date de la prise de vue: 24 avril 2023
• Lieu: Evansville, Ontario, Canada

Informations supplémentaires

Cameroceras means “chambered horn.” It was first named and described in 1842. This nightmarish cephalopod thrived for about 50 million years but its abundance declined considerably after the Ordovician-Silurian extinctions. The soft tissue outside the shell would have decayed after death so we can only speculate on its appearance. The modern chambered nautilus suggests some ideas about the physiology of Cameroceras—for instance, a soft body within protected by the long shell; tentacles protruding from the wide part of the conical shell used to grab prey; and a beaked “mouth” in the centre of the tentacles perhaps strong enough to break open the shell or exoskeleton of that prey. It was likely an ambush predator, as the large shell might have made swimming difficult.

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