The Oncocerida comprise a diverse group of generally small nautiloid cephalopods known from the Middle Ordovician to the Mississippian (early Carboniferous;...
5 KB (681 words) - 00:11, 30 November 2021
somewhat variable between authors, but it usually includes Tarphycerida, Oncocerida, and Nautilida. All nautiloids have a large external shell, divided into...
37 KB (3,465 words) - 14:06, 14 June 2024
Pseudorthocerida (432 to 272 Ma) Order † Tarphycerida (485 to 386 Ma) Order † Oncocerida (478.5 to 324 Ma) Order Nautilida (extant; 410.5 Ma to present) Order...
138 KB (15,375 words) - 21:28, 9 July 2024
resulting in large, long camarae. In others such as the Ellesmerocerida, Oncocerida and Discosorida the septa are crowded closely together. In some straight-shelled...
3 KB (373 words) - 10:36, 23 June 2024
Megaloceras is a genus of the nautiloid order Oncocerida that lived during the Silurian period of the Paleozoic. It is included in the family Karoceratidae...
1 KB (71 words) - 01:46, 29 December 2022
taxonomies (Manda & Turek, 2009) the Rutoceratidae are included in the Oncocerida rather than in the Nautilida The name has been mis-spelt as Capriocornites...
2 KB (136 words) - 23:51, 16 March 2024
2013, Multiceratoidea included four nautiloid orders: Ellesmerocerida, Oncocerida, Discosorida, and Ascocerida. The order Tarphycerida was considered a...
6 KB (564 words) - 01:08, 24 November 2023
siphuncle, apparently with thin connecting rings characteristic of the Oncocerida and later Nautilida. Leonoardoceras is considered, as of ref. date, to...
2 KB (214 words) - 19:27, 18 July 2023
of North America, named by Foerste in 1934. Galtoceras is genus of the Oncocerida and of the oncocerid family Acleistoceratidae. As with the ascleistoceratids...
1 KB (124 words) - 04:45, 5 March 2021
Aletoceras is a genus of Oncocerida nautiloids from the middle Devonian of North America included in the family Brevicoceratidae. The shell is a depressed...
1 KB (126 words) - 18:51, 18 July 2023
Lorieroceras (category Oncocerida)
turban-shaped helix that is sinistrally coiled. Sweet, W.C. 1964; Nautiloidea -Oncocerida; Treatise on Invertebrate Paleontology, Part K ; Geological Society of...
1 KB (79 words) - 08:21, 14 July 2024
early schemes. Both Shimansky and Kummel derive the Nautilida from the Oncocerida with either the Acleistoceratidae or Brevicoceratidae (Teichert 1988)...
10 KB (1,127 words) - 17:26, 3 December 2023
Ellesmerocerida Orthocones: Endocerida, Orthocerida, Actinocerida Brevicones: Ascocerida, Oncocerida Earliest coiled cephalopods: Tarphycerida Spirulid?: Shimanskya...
52 KB (5,802 words) - 15:21, 14 August 2024
Grimsbyoceras (category Oncocerida)
Grimsbyoceras is a nautiloid genus included in the Oncocerida order of the family Acleistoceratidae that lived during the Middle Devonian. They have been...
1 KB (124 words) - 20:54, 20 March 2018
subclass Nautiloidea, comprising the phylogenetically related Nautilida, Oncocerida, and Tarphycerida. The superorder has its roots in the Bassleroceratidae...
2 KB (167 words) - 19:07, 18 July 2023
siphuncle is small, necks recurved. Waltre C. Sweet, 1964. Nautiloidea-Oncocerida. Treatise on Invertebrate Paleontology, Part K. Geological Society of...
1 KB (73 words) - 10:53, 19 March 2024
the ancestral Ellesmerocerida and the more advanced Tarphycerida and Oncocerida. The order, as originally defined, contains two families, the Bassleroceratidae...
4 KB (455 words) - 08:17, 25 January 2024
in the Middle Silurian of North America, in Ontario. Oncocerids (Order Oncocerida) were Nautiloid cephalopods that lived during the early part of the Paleozoic...
2 KB (181 words) - 05:08, 11 August 2021
Spanioceras is an extinct genus of nautiloid cephalopods belonging to the order Oncocerida, which is thought to have given rise to the Nautilida which includes the...
780 bytes (38 words) - 16:27, 8 March 2018
Sepkoski J.J. List of Cephalopod Genera [1] Walter C. Sweet, 1964. Nautiloidea - Oncocerida. Treatise on Invertebrate Paleontology, Part K, 1964. v t e...
1 KB (63 words) - 02:02, 20 March 2018
Ellesmerocerida Orthocones: Endocerida, Orthocerida, Actinocerida Brevicones: Ascocerida, Oncocerida Earliest coiled cephalopods: Tarphycerida Spirulid?: Shimanskya...
5 KB (437 words) - 18:48, 12 January 2024
Sepiida (C) Belemnoidea (D) Spirulida (E) Orthocerida (F) Nautilida (G) Oncocerida (H) Pseudorthocerida (I) Oegopsina (J) Bactritida. IC indicates the initial...
49 KB (5,280 words) - 15:56, 21 June 2024
probably from either Brevicoceratidae or Acleistoceratidae of the order Oncocerida early in the Devonian. Rutoceratidae comprise a family within the oncocerid...
3 KB (199 words) - 09:15, 12 March 2022
Valhalloceras floweri Evans and King 1990. Valhalloceras is assigned to the Oncocerida, it and the related genus Phthanoncoceras are united in the family Phthanoncoceratidae...
1 KB (72 words) - 00:01, 18 December 2021
Pseudobrevicoceras is an extinct genus of nautilitoid cephalopods in the order Oncocerida. The familial position is undetermined. Externally Pseudobrevicoceras...
1 KB (100 words) - 07:02, 20 March 2018
Oncoceratidae is a family of nauatiloid cephalopods in the order Oncocerida established by Hyatt, 1884, that range from the Middle Ordovician to the Upper...
5 KB (535 words) - 09:04, 12 March 2022
Hipparionoceras (category Oncocerida)
Middle Silurian may be ancestral. Walter C. Sweet, 1964. Nautiloidea-Oncocerida. Treatise on Invertebrate Paleontilogy, Part K. Geological Society of...
1 KB (110 words) - 15:33, 14 August 2024
Projovellania (category Oncocerida)
being compressed rather than depressed. Sweet W.C. 1964. Nautiloidea-Oncocerida. Treatise on Invertebrate Paleontology, Part K. Geological Society of...
796 bytes (62 words) - 19:08, 18 July 2023
Ellesmerocerida Orthocones: Endocerida, Orthocerida, Actinocerida Brevicones: Ascocerida, Oncocerida Earliest coiled cephalopods: Tarphycerida Spirulid?: Shimanskya...
3 KB (204 words) - 01:23, 29 December 2023
Ellesmerocerida Orthocones: Endocerida, Orthocerida, Actinocerida Brevicones: Ascocerida, Oncocerida Earliest coiled cephalopods: Tarphycerida Spirulid?: Shimanskya...
13 KB (1,355 words) - 04:09, 15 July 2024