| Asaphus expansus Temporal range: 1
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Scientific classification 
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| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Clade: | †Artiopoda |
| Class: | †Trilobita |
| Order: | †Asaphida |
| Family: | †Asaphidae |
| Genus: | †Asaphus |
| Species: | †A. expansus
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| Binomial name | |
| †Asaphus expansus (Wahlenberg, 1821)
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Asaphus expansus (/ˈæsæfʌs ɛkspænsʌs/) is the type species of the asaphid trilobite genus Asaphus. It was previously classified as Entomostracites expansus before being split off into its own genus.2
Location
Most specimens have been obtained in Northern Europe, with one known exception being in North America.3
Characteristics
Asaphus expansus differs from related species in its genus by having a cranidium that is considered broad, as opposed to its more medium sized counterparts. Examples of these other species are A. fallax and A. raniceps.4
References
References
- MOORE, R. C. (ED.). 1959. Treatise on Invertebrate Paleontology, Pt. O, Arthropoda 1. Geological Society of America and University of Kansas Press, Lawrence, 560 p
- International Commission on Zoological Nomenclature (1982). "Direction 111 - Entomostracites punctatus Wahlenberg (Trilobita) (Official List Of Specific Names No. 1595): Date To Be Cited As [1818]". Bulletin of Zoological Nomenclature. 39.
- "Asaphus expansus (Wahlenberg, 1821)". gbif.org. Retrieved 2024-06-12.
- "Drawings of the cephala of A. Asaphus expansus, B. A. fallax, and C. A. raniceps". researchgate.net. Retrieved 2024-06-12.