Fibulacaris

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Fibulacaris
Temporal range: 518  Ma
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Fibulacaris nereidis Holotype.jpg
Holotype specimen of Fibulacaris nereidis (ROMIP 65380)
Diagrammatic reconstruction of Fibulacaris nereidis.jpg
Diagram
Scientific classification
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Fibulacaris
Izquierdo-López & Caron, 2019
Life restoration Fibulacaris nereidis.jpg
Life restoration

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. [1] It was probably an actively swimming filter feeder and possibly swam upside-down like some branchiopod crustaceans and horseshoe crabs. [1] Phylogenetic analysis suggest it was a relative or member of Hymenocarina, which contains other bivalved arthropods. [1] [2]

References

  1. 1 2 3 4 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. Bibcode:2019RSOS....691350I. doi:10.1098/rsos.191350. PMC   6894550 . PMID   31827867.
  2. Izquierdo-López, Alejandro; Caron, Jean-Bernard (2021). Zhang, Xi-Guang (ed.). "A Burgess Shale mandibulate arthropod with a pygidium: a case of convergent evolution" . Papers in Palaeontology. 7 (4): 1877–1894. Bibcode:2021PPal....7.1877I. doi:10.1002/spp2.1366. ISSN   2056-2799. S2CID   236284813.