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- Plectoceras abstract "Plectoceras is a nautiloid genus included in the tarphycerid suborder Barrandeocerina that lived during the Middle and Late Ordovician. It has been found widespread in the Middle and Upper Ordovician of North America. Plectoceras has a coiled, costate shell with a perforate (see-through) umblilcus; whorls are dorsally impressed by end of first volution but loosen in the adult stage with the mature body chamber diverging from the adjacent whorl. Costae (ribs) slope dorso-ventrally toward the apex and sutures are straight or have lateral lobes. The siphuncle is subventral, orthochoantic with short, straight necks and thin connecting rings.Plectoceras and its contemporary Barrandeoceras are both likely derived from the Tarphyceratidae; Plectoceras with its subventral siphuncle possibly from Campbelloceras, Barrandeoceras with its subcentral siphuncle possibly from Centrotarphyceras.".
- Plectoceras class Cephalopod.
- Plectoceras class Nautiloid.
- Plectoceras family Plectoceratidae.
- Plectoceras kingdom Animal.
- Plectoceras order Barrandeocerina.
- Plectoceras order Tarphycerida.
- Plectoceras phylum Mollusca.
- Plectoceras wikiPageID "36262979".
- Plectoceras wikiPageRevisionID "501460745".
- Plectoceras classis "Cephalopoda".
- Plectoceras familia Plectoceratidae.
- Plectoceras fossilRange "Mid to Late Ordovician".
- Plectoceras genus "Plectoceras".
- Plectoceras genusAuthority "Hyatt,1884".
- Plectoceras hasPhotoCollection Plectoceras.
- Plectoceras ordo Tarphycerida.
- Plectoceras phylum "Mollusca".
- Plectoceras regnum "Animalia".
- Plectoceras subclassis Nautiloid.
- Plectoceras subordo Barrandeocerina.
- Plectoceras subject Category:Nautiloids.
- Plectoceras subject Category:Ordovician_animals.
- Plectoceras type Animal.
- Plectoceras type Eukaryote.
- Plectoceras type Mollusca.
- Plectoceras type Species.
- Plectoceras type Organism.
- Plectoceras comment "Plectoceras is a nautiloid genus included in the tarphycerid suborder Barrandeocerina that lived during the Middle and Late Ordovician. It has been found widespread in the Middle and Upper Ordovician of North America. Plectoceras has a coiled, costate shell with a perforate (see-through) umblilcus; whorls are dorsally impressed by end of first volution but loosen in the adult stage with the mature body chamber diverging from the adjacent whorl.".
- Plectoceras label "Plectoceras".
- Plectoceras sameAs m.0k2fmjl.
- Plectoceras sameAs Q7204383.
- Plectoceras sameAs Q7204383.
- Plectoceras wasDerivedFrom Plectoceras?oldid=501460745.
- Plectoceras isPrimaryTopicOf Plectoceras.