| dbo:abstract |
The Tarphycerida were the first of the coiled cephalopods, found in marine sediments from the Lower Ordovician (middle and upper Canad) to the Middle Devonian. Some, such as Aphetoceras and Estonioceras, are loosely coiled and gyroconic; others, such as Campbelloceras, Tarphyceras, and Trocholites, are tightly coiled, but evolute with all whorls showing. The body chamber of tarphycerids is typically long and tubular, as much as half the length of the containing whorl in most, greater than in the Silurian Ophidioceratidae. The Tarphycerida evolved from the elongated, compressed, exogastric Bassleroceratidae, probably Bassleroceras, around the end of the Gasconadian through forms like Aphetoceras. Close coiling developed rather quickly, and both gyroconic and evolute forms are found in the early middle Canadian. Tarphycerids tend to uncoil in the late mature stage of their growth, indicating they settled into a benthic lifestyle as they became older. Younger, wholly coiled forms were probably more active, nektobenthic, certainly more maneuverable. (en) Tarphycerida Flower, 1950 è un ordine di molluschi cefalopodi estinti, appartenenti alla sottoclasse Nautiloidea, conosciuti dall'Ordoviciano al Siluriano. (it) Tarphycerida — вимерлий ряд головоногих молюсків підкласу наутилоїдей (Nautiloidea), що існував в ордовицькому та силурійському періодах. Це перші відомі наутилоїдеї із спірально згорнутою раковиною. (uk) |
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wiki-commons:Special:FilePath/Aphetoceras_americanum.jpg?width=300 |
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dbr:Campbelloceras dbr:Devonian dbr:Allonautilus dbr:Apsidoceratidae dbr:Estonioceras dbr:Estonioceratidae dbr:Coleoidea dbr:Endocerida dbr:Mount_Horeb,_Wisconsin dbr:Ophidioceratidae dbr:Aphetoceras dbr:Bassleroceras dbr:Bassleroceratidae dbr:Silurian dbc:Early_Ordovician_first_appearances dbc:Prehistoric_cephalopod_orders dbr:Cephalopods dbr:Lechritrochoceratidae dbr:Actinocerida dbr:Ammonoidea dbr:Barrandeoceratidae dbc:Tarphycerida dbc:Devonian_extinctions dbr:Treatise_on_Invertebrate_Paleontology dbr:Discosorida dbr:Nautilida dbr:Nautilus dbr:Oncocerida dbr:Ordovician dbr:Orthocerida dbr:Canadian_Epoch dbr:Nephriticeratidae dbr:Tarphyceras dbr:Plectoceratidae dbr:Tarphyceratidae dbr:Trocholitidae dbr:Uranoceratidae dbr:Trocholites dbr:Bickmoritidae |
| dbp:authority |
Flower, 1950 (en) |
| dbp:image |
A coiled cephalopods imprint from Dane county, Wisconsin.jpg (en) |
| dbp:image2Caption |
A Trocholites imprint from Mount Horeb, Wisconsin (en) |
| dbp:imageCaption |
A reconstruction of Aphetoceras americanum (en) |
| dbp:taxon |
Tarphycerida (en) |
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| rdfs:comment |
Tarphycerida Flower, 1950 è un ordine di molluschi cefalopodi estinti, appartenenti alla sottoclasse Nautiloidea, conosciuti dall'Ordoviciano al Siluriano. (it) Tarphycerida — вимерлий ряд головоногих молюсків підкласу наутилоїдей (Nautiloidea), що існував в ордовицькому та силурійському періодах. Це перші відомі наутилоїдеї із спірально згорнутою раковиною. (uk) The Tarphycerida were the first of the coiled cephalopods, found in marine sediments from the Lower Ordovician (middle and upper Canad) to the Middle Devonian. Some, such as Aphetoceras and Estonioceras, are loosely coiled and gyroconic; others, such as Campbelloceras, Tarphyceras, and Trocholites, are tightly coiled, but evolute with all whorls showing. The body chamber of tarphycerids is typically long and tubular, as much as half the length of the containing whorl in most, greater than in the Silurian Ophidioceratidae. The Tarphycerida evolved from the elongated, compressed, exogastric Bassleroceratidae, probably Bassleroceras, around the end of the Gasconadian through forms like Aphetoceras. Close coiling developed rather quickly, and both gyroconic and evolute forms are found in the e (en) |
| rdfs:label |
Tarphycerida (en) Tarphycerida (it) Tarphycerida (uk) |
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dbr:Trocholitidae |
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