Pectinatites

Pectinatites is an extinct cephalopod genus belonging to the order Ammonoidea, that lived during the upper Tithonian stage of the Late Jurassic.

[1] They were fast-moving nektonic carnivores.

[2] Clutches of eggs attributed to this genus have been discovered in the Kimmeridge Clay.

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P. pectinatus from Kimmeridge Clay Formation, Swindon, Wiltshire, England at the Natural History Museum