Acernaspis

Acernaspis is an extinct genus of trilobite that is known from the Silurian. It contains two species, A. elliptifrons, and A. salmoensis. It is sometimes found preserved in burrows of various forms, sometimes in association with multiple moults, suggesting that it used tunnels as refuges whilst in its vulnerable moulting stage.[3]

Acernaspis
Acernaspis orestes inside burrow,[1] Jupiter Formation, Anticosti Island, Quebec.
Scientific classification
Kingdom:
Animalia
Phylum:
Arthropoda
Class:
Trilobita
Order:
Phacopida
Family:
Phacopidae
Genus:
Acernaspis

Campbell, 1967
Species
  • A. orestes Billings, 1860 type species = Phacops orestes, A. mimica, A. superciliexcelsis[2]
Synonyms
  • Eskaspis
  • Murphycops

References
  1. Chatterton, B. D. E.; Collins, D. H.; Ludvigsen, R. (2003). "Cryptic behaviour in trilobites: Cambrian and Silurian examples from Canada, and other related occurrences". In Lane, P. D; Siveter, D. J; Fortey, R. A (eds.). Trilobites and Their Relatives. Special Papers in Palaeontology. Vol. 70. The Palaeontological Association. pp. 157–173. ISBN 978-0-901702-81-4.
  2. Sandford, Andrew C.; Holloway, David J. (2006). "Early Silurian phacopide trilobites from central Victoria, Australia" (PDF). Memoirs of the Museum of Victoria. 63 (2): 215–255. doi:10.24199/j.mmv.2006.63.17. S2CID 130169682.
  3. Chatterton, B. D. E.; Collins, D. H.; Ludvigsen, R. (2003). "Cryptic behaviour in trilobites: Cambrian and Silurian examples from Canada, and other related occurrences". In Lane, P. D; Siveter, D. J; Fortey, R. A (eds.). Trilobites and Their Relatives. Special Papers in Palaeontology. Vol. 70. The Palaeontological Association. pp. 157–173. ISBN 978-0-901702-81-4.


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