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Anomalocarididae

Clade of extinct arthropods

Clade of extinct arthropods

  • Lenisicaris
  • Shucaris?
  • *Paranomalocaris *?
  • Verrocaris

Anomalocarididae (occasionally mis-spelt Anomalocaridae) is an extinct family of Cambrian radiodonts, a group of stem-group arthropods.

Around 1990s and early 2010s, Anomalocarididae included all radiodont species, hence the previous equivalent of the common name "anomalocaridid" to the whole Radiodonta. This is no longer the case after the revision done by Vinther et al. 2014, as Anomalocarididae restricted to only Anomalocaris and, if any, a few of closely related genera since then. Wu et al. 2021 accepted only Anomalocaris (excluding "A." saron, "A." kunmingensis and "A." briggsi) and Lenisicaris as the member of Anomalocarididae, while Paranomalocaris is questionably included by some studies as well. Since then, other species labeled under the Anomalocaris genus, like A. saron have been reassigned to their own genus (like in the case of A. saron being redescribed as Innovatiocaris).

Anomalocarididae distinguished from the similar family Amplectobeluidae (e.g. Amplectobelua, Lyrarapax) by the presence of triradial oral cone and non-hypertrophied first distal endite. Compared to Hurdiidae and Tamisiocarididae, these two radiodont families shared a lot of characters (i.e. alternated endite length; streamlined body; small head with ovoid sclerites; well-developed swimming flaps; caudal furcae; raptorial predatory lifestyle) and forming a clade in multiple phylogenetic analysis.

References

References

  1. RAYMOND, P. E. 1935. [[iarchive:cbarchive 133692 leanchoiliaandothermidcambrian1935/page/n23/mode/2up. ''Leanchoilia'' and other mid-Cambrian Arthropoda]]. Bulletin of the Museum of Comparative Zoology, Harvard University, 76: 205–230.
  2. (2013-11-01). "New anomalocardid frontal appendages from the Guanshan biota, eastern Yunnan". Chinese Science Bulletin.
  3. (2014). "A suspension-feeding anomalocarid from the Early Cambrian". Nature.
  4. (2021-05-01). "New anomalocaridids (Panarthropoda: Radiodonta) from the lower Cambrian Chengjiang Lagerstätte: Biostratigraphic and paleobiogeographic implications". Palaeogeography, Palaeoclimatology, Palaeoecology.
  5. Edgecombe, Gregory D.. (2010-03-01). "Arthropod phylogeny: An overview from the perspectives of morphology, molecular data and the fossil record". Arthropod Structure & Development.
  6. (2015). "Anomalocaridid trunk limb homology revealed by a giant filter-feeder with paired flaps". Nature.
  7. (2018-11-01). "Origin of raptorial feeding in juvenile euarthropods revealed by a Cambrian radiodontan". National Science Review.
  8. (2021). "The endemic radiodonts of the Cambrian Stage 4 Guanshan biota of South China". Acta Palaeontologica Polonica.
  9. (2022-09-07). "''Innovatiocaris'', a complete radiodont from the early Cambrian Chengjiang Lagerstätte and its implications for the phylogeny of Radiodonta". Journal of the Geological Society.
  10. (2012-06-01). "The oral cone of ''Anomalocaris'' is not a classic ''peytoia''". Naturwissenschaften.
  11. (2021). "Exceptional multifunctionality in the feeding apparatus of a mid-Cambrian radiodont". Paleobiology.
  12. (1994-05-27). "Evidence for Monophyly and Arthropod Affinity of Cambrian Giant Predators". Science.
  13. (2014). "Morphology of Anomalocaris canadensis from the Burgess Shale". Journal of Paleontology.
  14. (2019-08-14). "A new hurdiid radiodont from the Burgess Shale evinces the exploitation of Cambrian infaunal food sources". Proceedings of the Royal Society B: Biological Sciences.
  15. (2017-08-30). "The functional head of the Cambrian radiodontan (stem-group Euarthropoda) Amplectobelua symbrachiata". BMC Evolutionary Biology.
  16. (2018-09-14). "New suspension-feeding radiodont suggests evolution of microplanktivory in Cambrian macronekton". Nature Communications.
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