Fibulacaris Explained

Fibulacaris is a monotypic genus of fossil arthropod known only by one species, Fibulacaris nereidis, discovered from the Cambrian Burgess Shale of Canada.[1] It was characterized by a bivalved carapace with an inverted rostrum, sandwiching the slender body with stalked eyes and homonomous appendages. It was probably an actively swimming filter feeder and possibly swam upside-down like some branchiopod crustaceans and horseshoe crabs. Phylogenetic analysis suggest it was a relative or member of Hymenocarina, which contains other bivalved arthropods.[2]

Notes and References

  1. Izquierdo-López . Alejandro . Caron . Jean-Bernard . 2019 . A possible case of inverted lifestyle in a new bivalved arthropod from the Burgess Shale . Royal Society Open Science . 6 . 11 . 191350 . 10.1098/rsos.191350 . 6894550 . 31827867. 2019RSOS....691350I .
  2. Izquierdo‐López . Alejandro . Caron . Jean‐Bernard . 2021 . Zhang . Xi‐Guang . A Burgess Shale mandibulate arthropod with a pygidium: a case of convergent evolution . Papers in Palaeontology . en . 7 . 4 . 1877–1894 . 10.1002/spp2.1366 . 236284813 . 2056-2799.

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