Orthocerida, also known as the Michelinocerida, is an order of extinct orthoceratoid cephalopods that lived from the Early Ordovician (490 million years...

†Ellesmerocerida. †Endoceratoidea = †Endocerida †Orthoceratoidea = †Orthocerida, †Ascocerida, and †Pseudorthocerida (the Orthoceratoidea of Kröger 2007)...

& Co., Garden City, New York Sweet, Walter C. (1964), Nautiloidea -- Orthocerida, in Treatise on Invertebrate Paleontology. Part K. Mollusca 3, Geological...

Dissidocerida, Actinocerida, Pseudorthocerida, Lituitida and Orthocerida. Orthocerida is a noteworthy paraphyletic order which is ancestral to the major...

(478.5 to 324 Ma) Order Nautilida (extant; 410.5 Ma to present) Order † Orthocerida (482.5 to 211.5 Ma) Order † Ascocerida (478 to 412 Ma) Order † Bactritida...

6 Ma. Paradnatoceras is included in the Orthocerida according to Sepkoski (2002). Inclusion of the Orthocerida in the subclass Orthoceratoidea is according...

cephalopods from the Middle Silurian of southern China belonging to the Orthocerida incertae sedis, its familial association undetermined. The type is Jangziceras...

long straight-shelled cephalopods like the long lasting and diverse Orthocerida). Early corals, articulate brachiopods (Orthida, Strophomenida, etc.)...

genus, probably from the actively mobile carnivorous cephalopod order Orthocerida, that lived in what would be North America during the Late Ordovician...

the earliest cephalopod group Ellesmerocerida Orthocones: Endocerida, Orthocerida, Actinocerida Brevicones: Ascocerida, Oncocerida Earliest coiled cephalopods:...

Tretoceras is an extinct genus of cephalopods included in the Orthocerida that lived in what would be Europe during the early Middle Ordovician, fossils...

In geology, the Arenig (or Arenigian) is a time interval during the Ordovician period and also the suite of rocks which were deposited during this interval...

(Kroger 2008) along with the Ascocerida, Dissidocerida, Lituitida, and Orthocerida. The Pseudorthocerida were among the last living orthoconic nautiloids...

the Lituitida instead of the Orthocerida is based in part on the idea that the Lituitidae are included in the Orthocerida rather than as originally perceived...

years. Orthoceratidae was named by McCoy (1844) and assigned to the Orthocerida by Teichert and Miller (1939),(as Orthocerotidae); to the Michelinoceratida...

Kazakhstan, and the Russian Federation. Sweet, W.C. 1964. Nautiloidea- Orthocerida. Treatise on Invertebrate Paleontology, Part K. Geol. Soc. of America...

further apart than on Cyrtocycloceras. Walter C. Sweet, 1964. Nautiloidea- Orthocerida. Treatise on Invertebrate Paleontology, Part K. Geological Society of...

and possible as early as the Silurian. Mericoceras is included in the Orthocerida, an order of cephalopods. Fossil distribution is exclusive to Sardinia...

mono-generic, family of extinct orthoceratoid cephalopods in the order Orthocerida that lived in what would be Europe during the middle Silurian from 428...

approximately 4.2 million years. Cryptocycloceras It was assigned to Orthocerida by Sepkoski (2002). The shell is usually long, and may be straight ("orthoconic")...

the Belemnoidea (Coleoidea). The Bactritida have their origin in the Orthocerida, nautiloid cephalopods that first appeared in the Ordovician. Bactroceras...

Carboniferous marine strata in Europe Walter C Sweet, 1964. Nautiloidea - Orthocerida; Treatise on Invertebrate Paleontology, Part K. Geological Society of...

Pseudotemperoceras is an extinct genus of nautiloid cephalopods belonging to the Orthocerida from the far eastern part of the Russian Federation that lived during...

is an extinct genus from the carnivorous nautiloid cephalopod order Orthocerida that lived in what would be North America, Europe, and Asia during the...

the earliest cephalopod group Ellesmerocerida Orthocones: Endocerida, Orthocerida, Actinocerida Brevicones: Ascocerida, Oncocerida Earliest coiled cephalopods:...

cylindrical (tubular connecting rings). Walter c. Sweet, 1964. Nautiloidea -Orthocerida. Treatise on Invertebrate Paleontology, Part K. Geological Society of...

orthoceratoids. They are considered to be more closely related to the Orthocerida than to the Ascocerida or Pseudorthocerida which are also included. Lituitids...

shells. A) Ammonoidea (B) Sepiida (C) Belemnoidea (D) Spirulida (E) Orthocerida (F) Nautilida (G) Oncocerida (H) Pseudorthocerida (I) Oegopsina (J) Bactritida...

organic deposits, unlike orthoceratoid cephalopod orders such as the Orthocerida and Actinocerida. Endocerids reached enormous body sizes. The largest...

Trispectes is an extinct genus of prehistoric nautiloids belonging to the Orthocerida, a variety of mostly straight-shelled cephalopods. Paleodb-Trispectes...