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26 relations: Acleistoceratidae, Anatomical terms of location, Animal, Bassleroceras, Breviconic Oncoceratidae, Cephalopod, Czech Republic, Devonian, Endocerida, Graciloceratidae, List of prehistoric nautiloid genera, Mollusca, National Museum (Prague), Nautiloid, Nothoceratidae, Oncoceras, Oncocerida, Ordovician, Polyelasmoceratidae, Septum, Silurian, Siphuncle, Slender Oncoceratidae, Treatise on Invertebrate Paleontology, Tripteroceratidae, Valcouroceratidae.
Acleistoceratidae
The Acleistoceratidae is a family of oncocerids that contains genera characterized by depressed (or rarely compressed) exogastric brevicones and cyrtocones (Sweet, 1964 K398) that range from the Middle Silurian to the Middle Devonian.
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Anatomical terms of location
Standard anatomical terms of location deal unambiguously with the anatomy of animals, including humans.
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Animal
Animals are multicellular eukaryotic organisms that form the biological kingdom Animalia.
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Bassleroceras
Bassleroceras is an elongate upwardly curved, exogastric, genus with the venter on the under side more sharply rounded than the dorsum on the upper.
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Breviconic Oncoceratidae
Breviconic Oncoceratidae comprise general included in the family Oncoceratidae known from generally short, i.e. breviconic and often exogastrically curved shells.
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Cephalopod
A cephalopod is any member of the molluscan class Cephalopoda (Greek plural κεφαλόποδα, kephalópoda; "head-feet") such as a squid, octopus or nautilus.
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Czech Republic
The Czech Republic (Česká republika), also known by its short-form name Czechia (Česko), is a landlocked country in Central Europe bordered by Germany to the west, Austria to the south, Slovakia to the east and Poland to the northeast.
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Devonian
The Devonian is a geologic period and system of the Paleozoic, spanning 60 million years from the end of the Silurian, million years ago (Mya), to the beginning of the Carboniferous, Mya.
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Endocerida
Endocerida is an extinct nautiloid order, a group of cephalopods from the Lower Paleozoic with cone-like deposits in its siphuncle.
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Graciloceratidae
The Graciloceratidae is a family of nautiloid cephalopods from the Middle and Upper Ordovician belonging to the Oncocerida, characterized by exogastric cyrtocones that expand slightly or moderately and have thin walled, orthochoantic marginal or subventral, tubular siphuncles (Sweet 1964).
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List of prehistoric nautiloid genera
This list of nautiloids is a comprehensive listing of all genera that have ever been included in the subclass Nautiloidea, excluding purely vernacular terms.
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Mollusca
Mollusca is a large phylum of invertebrate animals whose members are known as molluscs or mollusksThe formerly dominant spelling mollusk is still used in the U.S. — see the reasons given in Gary Rosenberg's.
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National Museum (Prague)
The National Museum (Národní muzeum) is a Czech museum institution intended to systematically establish, prepare and publicly exhibit natural scientific and historical collections.
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Nautiloid
Nautiloids are a large and diverse group of marine cephalopods (Mollusca) belonging to the subclass Nautiloidea that began in the Late Cambrian and are represented today by the living Nautilus and Allonautilus.
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Nothoceratidae
Nothoceratidae is a family of nautiloid cephalopods in the orthoceratoid order Oncocerida in which shells are exogastrically or endogastrically breviconic, planospiral, or torticonic; often with a constricted or visored aperture; and a siphuncle commonly composed of concave segments and occupied by actinosiphonate deposits.
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Oncoceras
Oncoceras is a genus of oncocerids, family Oncoceratidae from the middle and upper Ordovician of North America and Europe.
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Oncocerida
The Oncocerida comprise a diverse group of generally small nautiloid cephalopods known from the Middle Ordovician to the Mississippian (early Carboniferous), in which the connecting rings are thin and siphuncle segments are variably expanded (Flower, 1950).
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Ordovician
The Ordovician is a geologic period and system, the second of six periods of the Paleozoic Era.
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Polyelasmoceratidae
Polyelasmoceratidae is a family of oncocerid nautiloids characterized by rapidly expanding endogastrically curved shells, curved such that the ventral side is longitudinally concave.
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Septum
In biology, a septum (Latin for something that encloses; plural septa) is a wall, dividing a cavity or structure into smaller ones.
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Silurian
The Silurian is a geologic period and system spanning 24.6 million years from the end of the Ordovician Period, at million years ago (Mya), to the beginning of the Devonian Period, Mya.
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Siphuncle
The siphuncle is a strand of tissue passing longitudinally through the shell of a cephalopod mollusk.
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Slender Oncoceratidae
Slender Oncoceratidae are those in the family Oncoceratidae, (Nautiloidea, Oncocerida) which have slender, commonly curved, shells.
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Treatise on Invertebrate Paleontology
The Treatise on Invertebrate Paleontology (or TIP) published by the Geological Society of America and the University of Kansas Press, is a definitive multi-authored work of some 50 volumes, written by more than 300 paleontologists, and covering every phylum, class, order, family, and genus of fossil and extant (still living) invertebrate animals.
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Tripteroceratidae
The Tripteroceratidae is a family of depressed, straight to slightly curved nautiloid cephalopods from the middle and upper Ordovician with generally flattened venters and empty siphuncles with straight to inflated sedments included in the Oncocerida (Sweet, 1964).
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Valcouroceratidae
The Valcouroceratidae is an oncocerid family from the middle and upper Ordovician, mainly of North America, consisting of genera characterized by exogastricly curved cyrtoconic and breviconic shells that change ontogeneticially from compressed to depressed or subtriangular and in which the siphuncle in ventral and actinosiphonate.
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References
[1] https://en.wikipedia.org/wiki/Oncoceratidae
