The Actinocerida are an order of generally straight, medium to large cephalopods that lived during the early and middle Paleozoic, distinguished by a siphuncle...
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†Actinocerida †Discosoritoidea = †Discosorida Three of these superorders were established for orders of uncertain placement: Endocerida, Actinocerida,...
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Ellesmerocerida (500 to 470 Ma) Order † Endocerida (485 to 430 Ma) Order † Actinocerida (480 to 312 Ma) Order † Discosorida (482 to 392 Ma) Order † Pseudorthocerida...
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Currently, Orthoceratoidea comprises the orders Riocerida, Dissidocerida, Actinocerida, Pseudorthocerida, Lituitida and Orthocerida. Orthocerida is a noteworthy...
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cephalopod group Ellesmerocerida Orthocones: Endocerida, Orthocerida, Actinocerida Brevicones: Ascocerida, Oncocerida Earliest coiled cephalopods: Tarphycerida...
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cephalopod group Ellesmerocerida Orthocones: Endocerida, Orthocerida, Actinocerida Brevicones: Ascocerida, Oncocerida Earliest coiled cephalopods: Tarphycerida...
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unlike orthoceratoid cephalopod orders such as the Orthocerida and Actinocerida. Endocerids reached enormous body sizes. The largest confirmed specimen...
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cephalopod group Ellesmerocerida Orthocones: Endocerida, Orthocerida, Actinocerida Brevicones: Ascocerida, Oncocerida Earliest coiled cephalopods: Tarphycerida...
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nautiloid cephalopod from the upper Ordovician, generally included in the Actinocerida. Nautiloids are a subclass of shelled cephalopods that were once diverse...
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cephalopod group Ellesmerocerida Orthocones: Endocerida, Orthocerida, Actinocerida Brevicones: Ascocerida, Oncocerida Earliest coiled cephalopods: Tarphycerida...
3 KB (278 words) - 10:36, 23 June 2024
cephalopod group Ellesmerocerida Orthocones: Endocerida, Orthocerida, Actinocerida Brevicones: Ascocerida, Oncocerida Earliest coiled cephalopods: Tarphycerida...
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cephalopod group Ellesmerocerida Orthocones: Endocerida, Orthocerida, Actinocerida Brevicones: Ascocerida, Oncocerida Earliest coiled cephalopods: Tarphycerida...
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(2016-04-02). "Siphuncular structures in Calciosiphonate nautiloid orders Actinocerida, Orthocerida and Barrandeocerida (Cephalopoda)". GFF. 138 (2): 295–305...
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groups, with its siphuncle placement more closely resembling that of the Actinocerida and especially the Orthocerida, which were recovered as its potential...
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Superfamily Pterioidea Order Plectronocerida † Order Ellesmerocerida † Order Actinocerida † Order Pseudorthocerida † Order Ascocerida † Order Endocerida † Order...
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cephalopod group Ellesmerocerida Orthocones: Endocerida, Orthocerida, Actinocerida Brevicones: Ascocerida, Oncocerida Earliest coiled cephalopods: Tarphycerida...
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Bassleroceras and is the source for the Orthocerida, Pseudorthocerida, Actinocerida, and Discosorida. The Ellesmerocerida mostly died out by the end of the...
8 KB (890 words) - 16:20, 14 January 2024
Armenoceratidae (category Actinocerida)
family of early Paleozoic nautiloid cephalopods belonging to the order Actinocerida. The Armenoceratidae, established by Troedsson (1926) are characterized...
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makes them also separate from the groups that include the Discosorida, Actinocerida, Endocerida, and Orthocerida, and from the superficially similar Ammonoidea...
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From the Katian of Sweden. Estimated after maximum diameter (165 mm). Actinocerida gen. et sp. indet. 1.911 m (estimate) Klug et al. (2015:270) From the...
358 KB (29,803 words) - 03:08, 2 August 2024
cephalopod group Ellesmerocerida Orthocones: Endocerida, Orthocerida, Actinocerida Brevicones: Ascocerida, Oncocerida Earliest coiled cephalopods: Tarphycerida...
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Ordovician (Katian) Králův Dvůr Formation Czech Republic A member of Actinocerida belonging to the family Ormoceratidae. Haloites gionyamaensis Sp. nov...
94 KB (4,895 words) - 19:41, 17 August 2024
cephalopod group Ellesmerocerida Orthocones: Endocerida, Orthocerida, Actinocerida Brevicones: Ascocerida, Oncocerida Earliest coiled cephalopods: Tarphycerida...
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cephalopod group Ellesmerocerida Orthocones: Endocerida, Orthocerida, Actinocerida Brevicones: Ascocerida, Oncocerida Earliest coiled cephalopods: Tarphycerida...
3 KB (319 words) - 01:15, 1 October 2023
cephalopod group Ellesmerocerida Orthocones: Endocerida, Orthocerida, Actinocerida Brevicones: Ascocerida, Oncocerida Earliest coiled cephalopods: Tarphycerida...
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and could inhabit depths greater than 100–200 m. The wide-siphuncled Actinocerida and the Discocerida both emerged during the Darriwilian. The direction...
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Oncocerida; Actinoceras with its somewhat similar name belongs to the Actinocerida. Sweet, Walter C. (1964). Nautiloidea-Oncocerida. Treatise on Invertebrate...
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cephalopod group Ellesmerocerida Orthocones: Endocerida, Orthocerida, Actinocerida Brevicones: Ascocerida, Oncocerida Earliest coiled cephalopods: Tarphycerida...
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Actinoceras (category Actinocerida)
principal and root genus of the Actinoceratidae, a major family in the Actinocerida, that lived during the Middle and Late Ordovician. It is an extinct genus...
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Pseudorthoceratidae sensu Sweet (1964). The Carbactinoceratidae are removed from the Actinocerida in Kroger and Mapes (2007). Pseudorthocerids were previously known as...
4 KB (378 words) - 00:40, 21 May 2024