Definition of Pseudorthocerids. Meaning of Pseudorthocerids. Synonyms of Pseudorthocerids

- Flower (1976) distinguished Middle Ordovician pseudorthocerids from Silurian and later pseudorthocerids on the basis of how the siphuncle changes during...
- grounds that it arose from a different baltoceratid ancestor. The pseudorthocerids are thought to be distinct because their protoconch and septal necks...
- taxa and a few groups survived into the early Mesozoic, including pseudorthocerids, bactritids, nautilids and possibly orthocerids. The last straight-s****ed...
- Spyroceras is a genus of pseudorthocerids from the Devonian of North America and Europe, defined by Alpheus Hyatt in 1884. Pseudorthocerids are a kind of orthocertaoid...
- off as separate order. Order † Orthocerida Includes orthocerids and pseudorthocerids Order † Ascocerida Order † Oncocerida Order † Discosorida Order † Tarphycerida...
- carbactinoceratids share key characters from the early development of pseudorthocerids missing from actinocerids. Among these is a bullet-shaped apex that...
- Southern New Mexico with features resembling those found in actinocerids. Pseudorthocerids and actinocerids (respectively Pseuorthocerida and Actinocerida) are...
- Tripteroceroides is a pseudorthocerid from the Lower Carboniferous (Mississippian) belonging to the family Spyroceratidae . Pseudorthocerids are nautiloid cephalopods...
- in the classification of major taxa. For instance, ascocerids and pseudorthocerids have a cicatrix and so do not belong among the neocephalopods. Conversely...
- actinocerids but differs in the having a protoconch characteristic of the pseudorthocerids. During grow of the animal the s**** expands dorsally with the distance...