Definition of Orthocerids. Meaning of Orthocerids. Synonyms of Orthocerids

- their protoconch and septal necks significantly different than orthocerids. Orthocerids flourished in the Paleozoic Era, giving rise to multiple orders...
- subsequently split off as separate order. Order † Orthocerida Includes orthocerids and pseudorthocerids Order † Ascocerida Order † Oncocerida Order † Discosorida...
- family) that in some more recent taxonomies has been classified with the orthocerids and listed under the order Lituitida. Fossils have been found in New...
- numerous orthocerids stretching through the Paleozoic, but it excludes colloids, despite colloids having a well-established ancestry among the orthocerids. Interpretations...
- of coleoid cephalopods, and appear to form a link between nautiloid orthocerids and more advanced coleoids. Boletzkyida was named and described by Bandel...
- famous finds are trilobites and the nautiloid cephalopod including the orthocerid order of extinct Silurian-Devonian orthoceratoid cephalopods. Nautiloid...
- rock-forming, as do certain other extinct, straight-s****ed cephalopods (e.g., orthocerid nautiloids). Studies on exceptionally preserved specimens have revealed...
- recent ones; morphologically similar to belemnites on one hand and to orthocerids on the other, but with a mantle that completely covered the s****; making...
- the first chamber of Bactroceras resembles that of other Ordovician orthocerids, such as Archigeisonoceras and Hedstroemoceras: it is about 10 mm in...
- Chicagooceras is a genus of orthocerids from the Silurian of North America. S**** are short, breviconic, and faintly curved. Sutures are fairly wide...