| Acernaspis | |
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| Acernaspis orestes inside burrow,2 Jupiter Formation, Anticosti Island, Quebec. | |
Scientific classification 
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| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Clade: | †Artiopoda |
| Class: | †Trilobita |
| Order: | †Phacopida |
| Family: | †Phacopidae |
| Genus: | †Acernaspis Campbell, 1967 |
| Species | |
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| Synonyms | |
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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
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.
- 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.