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NarrativeWikipediaarticle
Occurrence & distributionGBIF · PBDB18 records
Deep timePBDB1 fossils
01Narrative
Aegirocassis est un genre fossile d'arthropodes marins radiodontes (en) de la famille disparue des hurdiidés (en) appartenant au clade des Anomalocarida dans lequel se place aussi la famille des anomalocarididés, des animaux marins apparus il y a 520 millions d'années et proches des actuels arthropodes. Une seule espèce est rattachée au genre, Aegirocassis benmoulae, décrite en 2015 par Peter Van Roy (d), Allison C. Daley (d) et Derek Briggs. Un premier fossile fut découvert dans la partie inférieure de la formation des argiles de Fezouata dans le Sud-Est du Maroc par Mohamed Ben Moula, un chasseur de fossiles marocain en l'honneur duquel l'animal a été nommé, lorsqu'il fut décrit en 2015 dans le journal scientifique Nature.
No narrative description available for this taxon yet.
How far back this lineage goes — and how we know. Everything here is measured in Ma, short for “mega-annum”: millions of years ago. The chart reads left to right like a calendar of the Earth, from the deep past on the left to today at the right edgetop to bottom like a core drilled through the Earth, from the deep past at the top down to today at the bottom.
At a glance
Fossil range486–477 Ma Cambrian, Ordovician
Dated fossil finds1
StatusExtinct no longer alive anywhere
When this lineage existed
How to read this: the coloured strip along the bottomdown the left is the geological calendar — the standard periods (Jurassic, Cretaceous…) every museum uses, shown so you can see which chapter of Earth's history this lineage lived in. The dashed rules marked ✦ are the five great mass extinctions. The solid bar is the fossil range: the span between the oldest and the youngest fossil that palaeontologists have assigned to Aegirocassis benmoulae. Above itBeside it, each dot is one dated fossil find — few enough to count, so they are drawn individually rather than as a graph.
fossil range (PBDB) †each dot = one dated findmass extinction
