| 词条 | Rasenia |
| 释义 |
|fossil_range = Jurassic (Kimmeridgian), {{Fossilrange|155.7|150.8}}[1] |image = Perisphinctoidea - Rasenia cymodoce.JPG |image_caption = Fossil shell of Rasenia cymodoce from Calvados (France), on display at Galerie de paléontologie et d'anatomie comparée in Paris |regnum = Animalia |phylum = Mollusca |classis = Cephalopoda |ordo = Ammonitida |familia = Aulacostephanidae |genus = Rasenia |genus_authority = }}Rasenia is an extinct ammonoid cephalopod genus belonging to the superfamily Perisphinctoidea. These fast-moving nektonic carnivores lived during the Upper Jurassic period, in the Kimmeridgian and Tithonian ages.[1] EtymologyThis genus gets its name from Market Rasen in Lincolnshire (Midland England), place where it is frequently found. DistributionFossils of species within this genus have been found in the Jurassic sediments of Russia,[1] France and United Kingdom. References1. ^1 2 The Paleobiology Database External links
4 : Ammonitida genera|Perisphinctoidea|Jurassic ammonites|Ammonites of Europe |
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