Acernaspis

Acernaspis
	Acernaspis orestes inside burrow, Jupiter Formation, Anticosti Island, Quebec.
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Clade:	†Artiopoda
Class:	†Trilobita
Order:	†Phacopida
Family:	†Phacopidae
Genus:	†Acernaspis; Campbell, 1967
Species
	Acernaspis orestes Billings, 1860 type species = Phacops orestes, A. mimica, A. superciliexcelsis ;
Synonyms
	Eskaspis; Murphycops;

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.^[2]

References

^ Sandford, Andrew C.; Holloway, David J. (2006). "Early Silurian phacopide trilobites from central Victoria, Australia". Memoirs of Museum Victoria. 63 (2): 215–255. doi:10.24199/j.mmv.2006.63.17. S2CID 130169682.
^ ^a ^b 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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[1] Sandford, Andrew C.; Holloway, David J. (2006). "Early Silurian phacopide trilobites from central Victoria, Australia". Memoirs of Museum Victoria. 63 (2): 215–255. doi:10.24199/j.mmv.2006.63.17. S2CID 130169682.

[Chatterton_et_al._2003-2] 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]

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