• Thumbnail for Oncocerida
    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
  • Thumbnail for Nautiloid
    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) - 12:40, 14 October 2024
  • Thumbnail for Cephalopod
    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...
    139 KB (15,484 words) - 20:02, 29 October 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
  • Thumbnail for Multiceratoidea
    2013, Multiceratoidea included four nautiloid orders: Ellesmerocerida, Oncocerida, Discosorida, and Ascocerida. The order Tarphycerida was considered a...
    6 KB (564 words) - 12:40, 14 October 2024
  • 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
  • Thumbnail for Septum (cephalopod)
    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
  • 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
  • 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
  • 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
  • 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
  • Thumbnail for Nautilida
    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
  • Thumbnail for Ammonoidea
    Ellesmerocerida Orthocones: Endocerida, Orthocerida, Actinocerida Brevicones: Ascocerida, Oncocerida Earliest coiled cephalopods: Tarphycerida Spirulid?: Shimanskya...
    52 KB (5,802 words) - 23:24, 29 October 2024
  • Thumbnail for Oncoceratidae
    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
  • 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
  • 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
  • 8/21/12 Sepkoski J.J. List of Cephalopod Genera Walter c. Sweet, 1964 Nautiloidea - Oncocerida. Treatise on Invertebrate Paleontology, Part K, 1964. v t e...
    1 KB (61 words) - 16:53, 19 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
  • 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
  • Thumbnail for Belemnitida
    Sepiida (C) Belemnoidea (D) Spirulida (E) Orthocerida (F) Nautilida (G) Oncocerida (H) Pseudorthocerida (I) Oegopsina (J) Bactritida. IC indicates the initial...
    50 KB (5,331 words) - 12:29, 14 October 2024
  • Zittelloceras is an extinct genus of nautiloids from the order Oncocerida which are among a large group of once diverse and numerous shelled cephalopods...
    2 KB (132 words) - 19:16, 20 June 2022
  • Blakeoceras (category Oncocerida)
    Blakeoceras is a nautiloid cephalopod from the Oncocerida family Nothoceratidae with a curved shell that lived in shallow seas from the Silurian to the...
    2 KB (202 words) - 07:20, 21 October 2024
  • Thumbnail for Orthoceras
    Ellesmerocerida Orthocones: Endocerida, Orthocerida, Actinocerida Brevicones: Ascocerida, Oncocerida Earliest coiled cephalopods: Tarphycerida Spirulid?: Shimanskya...
    5 KB (437 words) - 01:31, 30 October 2024
  • Thumbnail for Inversoceras
    Inversoceras is a genus of cephalopods in the order Oncocerida and the family Trimeroceratidae. These mollusks were fast-moving nektobenthic carnivores...
    2 KB (121 words) - 20:03, 11 September 2024
  • Thumbnail for Endocerida
    Ellesmerocerida Orthocones: Endocerida, Orthocerida, Actinocerida Brevicones: Ascocerida, Oncocerida Earliest coiled cephalopods: Tarphycerida Spirulid?: Shimanskya...
    13 KB (1,355 words) - 12:35, 14 October 2024
  • Thumbnail for Slender Oncoceratidae
    Slender Oncoceratidae are those in the family Oncoceratidae, (Nautiloidea, Oncocerida) which have slender, commonly curved, shells. Some like Oocerina are gently...
    5 KB (604 words) - 04:34, 31 August 2024
  • Thumbnail for Bactritida
    Ellesmerocerida Orthocones: Endocerida, Orthocerida, Actinocerida Brevicones: Ascocerida, Oncocerida Earliest coiled cephalopods: Tarphycerida Spirulid?: Shimanskya...
    7 KB (713 words) - 15:28, 30 December 2023
  • 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
  • Thumbnail for Rutoceratidae
    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
  • Conostichoceras (category Oncocerida)
    the orders Oncocerida, Tarphycerida, and Nautilida. The family Nothoceratidae to which it belongs is one of 16 included in the Oncocerida. Barskov, I...
    3 KB (275 words) - 21:36, 16 March 2024