About: Actinoceratidae

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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

Attributes	Values
rdf:type	yago:WikicatOrdovicianAnimals yago:WikicatSilurianAnimals yago:Animal100015388 yago:LivingThing100004258 yago:Object100002684 yago:Organism100004475 yago:PhysicalEntity100001930 insect yago:Whole100003553 umbel-rc:Mollusk
rdfs:label	Actinoceratidae (en) Actinoceratidae (cs)
rdfs:comment	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 (en)
dcterms:subject	Middle Ordovician first appearances Ordovician cephalopods Silurian cephalopods Silurian extinctions Prehistoric nautiloid families
Wikipage page ID	24595677 (xsd:integer)
Wikipage revision ID	1096927999 (xsd:integer)
Link from a Wikipage to another Wikipage	Leurorthoceras Nybyoceras Paractinoceras Armenoceras Silurian Actinoceras Middle Ordovician first appearances Ordovician cephalopods Silurian cephalopods Silurian extinctions Lambeoceras Saffordoceras Actinocerida Kochoceras Wutinoceras Prehistoric nautiloid families Ordovician Ormoceras Nautiloidea Siphuncle Troostoceras dbr:Floweroceras
sameAs	Actinoceratidae Actinoceratidae Actinoceratidae Actinoceratidae Actinoceratidae Actinoceratidae Actinoceratidae
dbp:wikiPageUsesTemplate	dbt:Automatic_taxobox dbt:Citation_needed dbt:Reflist dbt:Short_description dbt:Taxonbar
authority	Saemann (en)
fossil range	Middle Ordovician - Lower Silurian (en)
subdivision	See text (en)
subdivision ranks	Genera (en)
taxon	Actinoceratidae (en)
has abstract	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. Seven genera are included in the Actinoceratidae, Actinoceras, , 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. (en)
gold:hypernym	Family
prov:wasDerivedFrom	wikipedia-en:Actinoceratidae?oldid=1096927999&ns=0
page length (characters) of wiki page	3000 (xsd:nonNegativeInteger)
foaf:isPrimaryTopicOf	wikipedia-en:Actinoceratidae
is Link from a Wikipage to another Wikipage of	Leurorthoceras Ellinoceras Paractinoceras Actinoceras Saffordoceras Actinocerida Kochoceras Troostoceras Selkirkoceras
is familia of	Ellinoceras
is family of	Ellinoceras
is foaf:primaryTopic of	wikipedia-en:Actinoceratidae

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