Typical Burgess Shale-type animals from the Fezouata biota.

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Typical Burgess Shale-type animals from the Fezouata biota. Typical Burgess Shale-type animals from the Fezouata biota. (a) Aegirocassis benmoulai, a giant filter-feeding anomalocaridid preserved in three dimensions within a concretion. Two sets of swimming flaps are evident on the left side of the trunk. (YPM (Yale Peabody Museum) 237172.) (b) A marrellomorph arthropod, probably belonging to the genus Furca. (MHNT (Natural History Museum of Toulouse) PAL.2007.39.80.1.) (c) Different type of marrellomorph showing similarities to Skania and Vachonisia. (YPM 226539.) The body and appendages are concealed by the carapace. All specimens are from the uppermost Tremadocian Araneograptus murrayi biozone. Peter Van Roy et al. Journal of the Geological Society 2015;172:541-549 © 2015 The Author(s)‏