nautilidae การใช้

• The Nautilidae are involute or slightly evolute and generally smooth with straight to sinuous sutures.
• The Nautilidae which is the root stock of the suborder includes the living " Nautilus"
• The Nautilaceae comprise six families : Nautilidae, Paracenoceratidae, Pseudonautilidae, Cymatoceratidae, Hercoglossidae, and Aturiidae.
• Nautilitoidea exist living today as the Nautilidae, represented by " Nautilus " and " Allonautilus ".
• The Nautilaceae are represented by " Nautilus " and " Allonautilus ", genera included in the Nautilidae.
• "Obinautilus " has also been placed in Nautilidae by some authorities, though it may instead be an argonautid octopus.
• The Syringonautilidae, in turn, are the source for the Nautilidae ( Nautilaceae ) which contain the genus " Nautilus ".
• The Nautilidae gave rise to the Cymatoceratidae and Hercoglossidae during the Jurassic while the Herocoglossidae became ancestral to the Aturiidae near the beginning of the Cenozoic.
• In 1927 the family Paracenoceratidae was named to house these four genera, and in 1956, the family was then downgraded to a subfamily within Nautilidae.
• Cymatoceratids first appear in the Middle Jurassic, derived from the Lower Jurassic " Cenoceras " ( Nautilidae ) and extend as far as the Oligocene.
• ""'Cenoceras " "'is an extinct genus within the cephalopod mollusk family Nautilidae, which in turn makes up part of the superfamily Nautilaceae.
• ""'Stroboceras " "'is an extinct nautilid family Trigonoceratidae; the group that have rise to the Nautilidae which includes the living " Nautilus ".
• The Nautilina are derived from the Syringonautilidae, a family in the Centroceratina ( Trigonocerataceae ), in the Late Triassic and consists of four families, the Nautilidae, Cymatoceratidae, Herocoglossidae, and Aturiidae.
• The Bassleroceratidae also gave rise to the Granciloceratidae, the ancestral family of the Oncocerida, which in turn gave rise to the Nautilida, which includes the Nautilidae which includes the living " Nautilus ".
• Rosenberg identified a minor inconsistency in the grouping of cephalopods ( Argonautidae and Nautilidae ) and scaphopods ( Dentaliidae ) with gastropods while listing bivalves separately, opining that " a single alphabetic sequence would be preferable ".
• Nautilidae, both extant and extinct, are characterized by involute or more or less convolute shells that are generally smooth, with compressed or depressed whorl sections, straight to sinuous sutures, and a tubular, generally central siphuncle.
• The family Nautilidae has its origin in the Trigonocerataceae ( Centroceratina ), specifically in the Syringonautilidae of the Late Triassic and continues to this day with " Nautilus ", the type genus, and its close relative, " Allonautilus ".
• The Nautilaceae began in the Late Triassic with " Cenoceras ", a golublar to discoidal genus derived from the Syringonautilidae and possibly from " Syringonautilus " . " Cenoceras ", the earliest member of the Nautilaceae and Nautilidae, is the only nautiloid known to have crossed the upper Triassic boundary and the only one known from the Lower Jurassic
• "Cimonea ", which intergades with " Eutrephoceras ", is the earliest and makes its first appearance in the Upper Jurassic . " Eutrephoceras " is assigned to the Nautilidae which includes " Nautilus " . " Hercoglassa ", which is derived from " Cimomia ", first appears in the Lower Cretaceous and is followed stratigraphically by " Aturoidea " and " Deltoidonautilus " which first appear in the Upper Cretaceous . " Aturoidea " is the progenitor of " Aturia " ( of the monotypic Aturidae ), to which it gave rise in the Paleocene . ( ibid)