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Asaphus expansus

From Wikipedia, the free encyclopedia

Asaphus expansus
Temporal range: upper Floian to Darriwilian [1]
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Trilobita
Order: Asaphida
Family: Asaphidae
Genus: Asaphus
Species:
A. expansus
Binomial name
Asaphus expansus
(Wahlenberg, 1821)

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

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Most specimens have been obtained in Northern Europe, with one known exeption being in North America.[3]

Characteristics

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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

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