| 词条 | Perilytoceras |
| 释义 |
| fossil_range = {{fossil range|182.7|174.1|Upper Toarcian}} |image = Lytoceratidae - Perilytoceras species.JPG |image_caption = Fossil shell of Perilytoceras species from Tulear (Madagascar) |regnum = Animalia |phylum = Mollusca |classis = Cephalopoda |subclassis = Ammonoidea |ordo = Ammonitida |subordo = Lytoceratina |familia = Lytoceratidae | genus = Perilytoceras | genus_authority = Rulleau, 1997 }}Perilytoceras is a genus of ammonoid cephalopods belonging to the family Lytoceratidae.[1] These fast-moving nektonic carnivores lived in the Toarcian age (from 182.7 to 174.1 million years ago). Shells could reach a diameter of {{convert|20|-|25|cm}}.[2] References1. ^Paleobiology Database 2. ^Ammonites External links
1 : Jurassic ammonites |
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