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- Actinoceratidae abstract "Actinoceriatidae is a family of actinocerids named by Saemann in 1853 for those that grew to have large shells with blunt apecies 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 there are internal deposits penetrated by a system of canalsActinoceratids are derived from Wutinoceras, possibly through an early Armenoceras or through Nybyoceras and give rise to Lambeoceras and to the Huroniidae. Seven genera are included in the Actinoceratidae, Actinoceras, Floweroceras, Kochoceras, Leurorthoceras, Paractinoceras, Saffordoceras, and Troostoceras. Actinoceras is the earliest but with a range that carries it into the Lower Silurian. Troostoceras followed by Saffordoceras are later Middle Ordovician genera related to early Actinoceras. Kochoceras followed by Floweroceras are Upper Ordovian genera related to later Actinoceras. Leurothoceras and Paractinoceras, both from the Upper Ordovician, are shown to have their source in Middle Ordovician actinoceratids. Paractinoceras is probably the most distinct actinoceratid from Actinoceras. Paractinoceras has a long, straight slender shell and a siphuncle that starts off like that in Actinoceras but becomes narrow like that in Ormoceras in the anterior part of the phragmocone. Kochoceras has a large blunt shell that expands more rapidly than Actinoceras and is strongly flattened on the ventral side causing possible confusion with Lambeoceras to casual observation. Floweroceras is doubtfully distinct from Kochoceras.Leurothoceras is synonymous with Actinoceras; Saffordoceras and Troostoceras are closely related.".
- Actinoceratidae class Cephalopod.
- Actinoceratidae class Nautiloid.
- Actinoceratidae kingdom Animal.
- Actinoceratidae order Actinocerida.
- Actinoceratidae phylum Mollusca.
- Actinoceratidae wikiPageID "24595677".
- Actinoceratidae wikiPageLength "2973".
- Actinoceratidae wikiPageOutDegree "25".
- Actinoceratidae wikiPageRevisionID "673701608".
- Actinoceratidae wikiPageWikiLink Actinoceras.
- Actinoceratidae wikiPageWikiLink Actinocerida.
- Actinoceratidae wikiPageWikiLink Animal.
- Actinoceratidae wikiPageWikiLink Armenoceras.
- Actinoceratidae wikiPageWikiLink Category:Middle_Ordovician_first_appearances.
- Actinoceratidae wikiPageWikiLink Category:Nautiloids.
- Actinoceratidae wikiPageWikiLink Category:Ordovician_cephalopods.
- Actinoceratidae wikiPageWikiLink Category:Silurian_cephalopods.
- Actinoceratidae wikiPageWikiLink Category:Silurian_extinctions.
- Actinoceratidae wikiPageWikiLink Cephalopod.
- Actinoceratidae wikiPageWikiLink Kochoceras.
- Actinoceratidae wikiPageWikiLink Lambeoceras.
- Actinoceratidae wikiPageWikiLink Mollusca.
- Actinoceratidae wikiPageWikiLink Nautiloid.
- Actinoceratidae wikiPageWikiLink Nautiloidea.
- Actinoceratidae wikiPageWikiLink Nybyoceras.
- Actinoceratidae wikiPageWikiLink Ordovician.
- Actinoceratidae wikiPageWikiLink Ormoceras.
- Actinoceratidae wikiPageWikiLink Silurian.
- Actinoceratidae wikiPageWikiLink Siphuncle.
- Actinoceratidae wikiPageWikiLink Wutinoceras.
- Actinoceratidae wikiPageWikiLinkText "Actinoceratidae".
- Actinoceratidae wikiPageWikiLinkText "actinoceratid".
- Actinoceratidae classis "Cephalopoda".
- Actinoceratidae familia "Actonoceratidae".
- Actinoceratidae familiaAuthority "Saemann".
- Actinoceratidae fossilRange "Middle Ordovician - Lower Silurian".
- Actinoceratidae hasPhotoCollection Actinoceratidae.
- Actinoceratidae ordo Actinocerida.
- Actinoceratidae phylum Mollusca.
- Actinoceratidae regnum "Animalia".
- Actinoceratidae subclassis Nautiloid.
- Actinoceratidae subclassis Nautiloidea.
- Actinoceratidae subdivision "see text".
- Actinoceratidae subdivisionRanks "Genera".
- Actinoceratidae wikiPageUsesTemplate Template:Reflist.
- Actinoceratidae wikiPageUsesTemplate Template:Taxobox.
- Actinoceratidae subject Category:Middle_Ordovician_first_appearances.
- Actinoceratidae subject Category:Nautiloids.
- Actinoceratidae subject Category:Ordovician_cephalopods.
- Actinoceratidae subject Category:Silurian_cephalopods.
- Actinoceratidae subject Category:Silurian_extinctions.
- Actinoceratidae hypernym Family.
- Actinoceratidae type Animal.
- Actinoceratidae type Article.
- Actinoceratidae type Eukaryote.
- Actinoceratidae type Mollusca.
- Actinoceratidae type Species.
- Actinoceratidae type Article.
- Actinoceratidae type Nautiloid.
- Actinoceratidae type Thing.
- Actinoceratidae type Q19088.
- Actinoceratidae type Q25326.
- Actinoceratidae type Q729.
- Actinoceratidae comment "Actinoceriatidae is a family of actinocerids named by Saemann in 1853 for those that grew to have large shells with blunt apecies 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.".
- Actinoceratidae label "Actinoceratidae".
- Actinoceratidae sameAs m.080q6fw.
- Actinoceratidae sameAs Q15728112.
- Actinoceratidae sameAs Q15728112.
- Actinoceratidae wasDerivedFrom Actinoceratidae?oldid=673701608.
- Actinoceratidae isPrimaryTopicOf Actinoceratidae.