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...
- numerous orthocerids stretching through the Paleozoic, but it excludes colloids, despite colloids having a well-established ancestry among the orthocerids. Interpretations...
- 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...
- subsequently split off as separate order. Order † Orthocerida Includes orthocerids and pseudorthocerids Order † Ascocerida Order † Oncocerida Order † Discosorida...
- famous finds are trilobites and the nautiloid cephalopod including the orthocerid order of extinct Silurian-Devonian orthoceratoid cephalopods. Nautiloid...
- greatest obstacles may lie among the nautiloids: The classification of orthocerids is still jumbled and requires revision based on features of the embryonic...
- 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...
- narrow siphuncles). By the mid Ordovician these orders are joined by the Orthocerids, whose first chambers are small and spherical, and Lituitids, whose siphuncles...
- the first chamber of Bactroceras resembles that of other Ordovician orthocerids, such as Archigeisonoceras and Hedstroemoceras: it is about 10 mm in...
- orthocerid family Kionoceratidae with scattered worldwide distribution from the Middle Ordovician to the Lower Permian. Kionoceratids are orthocerids...