Asaphus expansus

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]

Asaphus expansus Temporal range: upper Floian to Darriwilian PreꞒ Ꞓ O S D C P T J K Pg N [1]
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	†Trilobita
Order:	†Asaphida
Family:	†Asaphidae
Genus:	†Asaphus
Species:	†A. expansus
Binomial name
†Asaphus expansus (Wahlenberg, 1821)

Location

Most specimens have been obtained in Northern Europe, with one known exeption 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

^{[3] [4]}

1. 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
2. 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.
3. "Asaphus expansus (Wahlenberg, 1821)". gbif.org. Retrieved 2024-06-12.
4. "Drawings of the cephala of A. Asaphus expansus , B. A. fallax , and C. A. raniceps". researchgate.net. Retrieved 2024-06-12.