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Actinoceratidae
Sign in to saveThe Actinoceriatidae are a family of actinocerids named by Saemann in 1853 for those that grew to have large shells with blunt apices and large siphuncles with widely expanded segments and a generally arcuate endosiphucular canal system. Their range is from the upper Middle Ordovician to the Lower Silurian. Actinocerids are generally straight-shelled nautiloid cephalopods with a siphuncle composed of expanded segments, typically with thin connecting rings, in which the internal deposits are penetrated by a system of canals.
Museum specimens
- Specimen records
- 2
- With media
- 8
- Family
- Actinoceratidae
- Collections
- UCMP, FMNH
- Recorded in
- United States, Bohemia
Wikidata facts
- Instance of
- taxon
- Parent taxon
- Actinocerida
Show 2 more facts
- taxon name
- Actinoceratidae
- taxon rank
- family
Sources (1)
via Wikidata · CC0
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Encyclopedic overview
1 sectionsContents
- References
The Actinoceriatidae are a family of actinocerids named by Saemann in 1853 for those that grew to have large shells with blunt apices and large siphuncles with widely expanded segments and a generally arcuate endosiphucular canal system. Their range is from the upper Middle Ordovician to the Lower Silurian. Actinocerids are generally straight-shelled nautiloid cephalopods with a siphuncle composed of expanded segments, typically with thin connecting rings, in which the internal deposits are penetrated by a system of canals.
Actinoceratids are derived from Wutinoceras, possibly through an early Armenoceras or through Nybyoceras and give rise to Lambeoceras and to the Huroniidae.
Excerpted from Wikipedia’s “Actinoceratidae” article, available under the CC BY-SA 4.0 licence.