Caryosyntrips

Caryosyntrips ("nutcracker") is an extinct genus of radiodont which known from Canada, United States and Spain during the middle Cambrian. Caryosyntrips is known only from its 14-segmented frontal appendages, which resemble nutcrackers, recovered from the Burgess Shale Formation, Canada Wheeler Shale and Marjum Formation, United States, and Valdemiedes Formation, Spain.[1][2] It was first named by Allison C. Daley, Graham E. Budd in 2010 and the type species is Caryosyntrips serratus.[3] Caryosyntrips is thought to have used their appendages in a scissor-like grasping or slicing motion, and were probably durophagous, feeding on hard-shelled organisms. Due to the unusual morphology of the frontal appendages and the limited extent of known remains, its position within Radiodonta remains uncertain.[1]

Caryosyntrips
Temporal range:
Frontal appendages of Caryosyntrips
Speculative life restoration
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: †Dinocaridida
Order: †Radiodonta
Genus: †Caryosyntrips
Daley & Budd, 2010
Type species
Caryosyntrips serratus
Daley & Budd, 2010
species
  • Caryosyntrips serratus
    Daley & Budd, 2010
  • Caryosyntrips camurus
    Pates & Daley, 2017[1]
  • Caryosyntrips durus
    Pates & Daley, 2017[1]
Presumed grasping motion

References
  1. Stephen Pates; Allison C. Daley (2017). "Caryosyntrips: a radiodontan from the Cambrian of Spain, USA and Canada". Papers in Palaeontology. 3 (3): 461–470. doi:10.1002/spp2.1084. S2CID 135026011.
  2. Pates, Stephen; Lerosey-Aubril, Rudy; Daley, Allison C.; Kier, Carlo; Bonino, Enrico; Ortega-Hernández, Javier (2021-01-19). "The diverse radiodont fauna from the Marjum Formation of Utah, USA (Cambrian: Drumian)". PeerJ. 9: e10509. doi:10.7717/peerj.10509. ISSN 2167-8359. PMC 7821760. PMID 33552709.
  3. Allison C. Daley, Graham E. Budd (2010). "New anomalocaridid appendages from the Burgess Shale, Canada". Palaeontology. 53 (4): 721–738. Bibcode:2010Palgy..53..721D. doi:10.1111/j.1475-4983.2010.00955.x.


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