Definition of Pseudorthocerida. Meaning of Pseudorthocerida. Synonyms of Pseudorthocerida

Here you will find one or more explanations in English for the word Pseudorthocerida. Also in the bottom left of the page several parts of wikipedia pages related to the word Pseudorthocerida and, of course, Pseudorthocerida synonyms and on the right images related to the word Pseudorthocerida.

Definition of Pseudorthocerida

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Meaning of Pseudorthocerida from wikipedia

- Pseudorthocerida is an order of generally straight longiconic orthoceratoids with a subcentral to marginal cyrtochoanitic siphuncle composed of variably...
- †Endoceratoidea = †Endocerida †Orthoceratoidea = †Orthocerida, †Ascocerida, and †Pseudorthocerida (the Orthoceratoidea of Kröger 2007) Nautilitoidea = †Tarphycerida...
- Orthoceratoidea comprises the orders Riocerida, Dissidocerida, Actinocerida, Pseudorthocerida, Lituitida and Orthocerida. Orthocerida is a noteworthy paraphyletic...
- Actinocerida (480 to 312 Ma) Order † Discosorida (482 to 392 Ma) Order † Pseudorthocerida (432 to 272 Ma) Order † Tarphycerida (485 to 386 Ma) Order † Oncocerida...
- resemble earlier actinocerids they are now thought to belong to the Pseudorthocerida Rayonnoceras is characterized by large straight s**** with a large...
- from early Ordovician cephalopods. Some workers have split off the Pseudorthocerida and Dissidocerida as separate orders, the latter on the grounds that...
- more closely related to the Orthocerida than to the Ascocerida or Pseudorthocerida which are also included. Lituitids are characterized by smooth to annulate...
- Belemnoidea (D) Spirulida (E) Orthocerida (F) Nautilida (G) Oncocerida (H) Pseudorthocerida (I) Oegopsina (J) Bactritida. IC indicates the initial chamber....
- Plectronocerida † Order Ellesmerocerida † Order Actinocerida † Order Pseudorthocerida † Order Ascocerida † Order Endocerida † Order Tarphycerida † Order...
- Spyroceratidae are defined as Pseudorthocerida with uniformly slender siphuncle segments, longer than wide, that contract sharply near either end, in which...