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List Of Ammonite Genera
This list of ammonites is a comprehensive listing of genera that are included in the subclass †Ammonoidea, excluding purely vernacular terms. The list includes genera that are commonly accepted as valid, as well those that may be invalid or doubtful (''nomina dubia''), or were not formally published (''nomina nuda''), as well as junior synonyms of more established names, and genera that are no longer considered ammonites. __NOTOC__ Reliability of this list Most of the generic names in this list come from Jack Sepkoski's 2002 compendium of marine fossil genera, which can be corroborated by other sources such as Part L, Ammonoidea, in the Treatise on Invertebrate Paleontology. Additional generic names included come from the Treatise or various peer review scientific journals. 150px, Ammolite is an iridescent gem stone">iridescent.html" ;"title="Ammolite is an iridescent">Ammolite is an iridescent gem stone made from the shells of fossil ammonites A file:Arcestes.jpg, 150px, The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Haeckel Ammonitida
Ernst Heinrich Philipp August Haeckel (; 16 February 1834 – 9 August 1919) was a German zoologist, naturalist, eugenicist, philosopher, physician, professor, marine biologist and artist. He discovered, described and named thousands of new species, mapped a genealogical tree relating all life forms and coined many terms in biology, including ''ecology'', ''phylum'', ''phylogeny'', and ''Protista.'' Haeckel promoted and popularised Charles Darwin's work in Germany and developed the influential but no longer widely held recapitulation theory ("ontogeny recapitulates phylogeny") claiming that an individual organism's biological development, or ontogeny, parallels and summarises its species' evolutionary development, or phylogeny. The published artwork of Haeckel includes over 100 detailed, multi-colour illustrations of animals and sea creatures, collected in his ''Kunstformen der Natur'' ("Art Forms of Nature"), a book which would go on to influence the Art Nouveau artistic move ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acanthoceras (ammonite)
''Acanthoceras'' is an extinct cephalopod genus belonging to the subclass Ammonoidea and family Acanthoceratidae that lived from the Albian to early Coniacian stages of the Cretaceous.''Acanthoceras'' at .org Description Their shells had ornate ribs whose function is unknown, although some scientists have speculated that these ribs helped strengthen the animals' shells to allow them to live at greater depths where the water pressure is higher. An adult had a shell diameter of approximately .Species * ''A. athabascense'' Warren and Stelck, 1955 * ''A. chasca'' Benavides-Caceres, 1956 * ''A. compital ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acriclymenia
''Acriclymenia'' was a genus of ammonites that existed during the Devonian period The Devonian ( ) is a geologic period and system of the Paleozoic era, spanning 60.3 million years from the end of the Silurian, million years ago (Mya), to the beginning of the Carboniferous, Mya. It is named after Devon, England, wh .... References Devonian ammonites Late Devonian first appearances Late Devonian animals Famennian extinctions Cyrtoclymeniina Ammonite genera {{Clymeniida-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aconeceras
''Aconeceras'' is an early Cretaceous ammonite included in the oppeliid subfamily Aconeceratidae, characterized by an involute, high-whorled, flat-sided shell that bears a finely serrate keel along the venter. Sutures have narrower and deeper elements than in '' Protaconeceras''. ''Aconeceras'' has been found in western Europe, South Africa, and eastern Australia. Its stratigraphic range is from the Upper Barramian to the Lower Albian The Albian is both an age of the geologic timescale and a stage in the stratigraphic column. It is the youngest or uppermost subdivision of the Early/Lower Cretaceous Epoch/Series. Its approximate time range is 113.0 ± 1.0 Ma to 100.5 ± 0.9 M .... References Arkell ''et al.'', 1957 Mesozoic Ammonoidea, Treatise on Invertebrate Paleontology Part L. Geol Society of America and Univ Kansas Press R.C Moore (ed) 1957 Early Cretaceous ammonites Ammonitida genera Haploceratoidea Ammonites of Australia {{Ammonitina-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acompsoceras
''Acompsoceras'' is an extinct genus of cephalopod belonging to the Ammonite subclass. It grew to a large size compared to most ammonites. Its shell reached in diameter when the animal reached adulthood. ''Acompsoceras'' appears in the fossil record during the early portion of the Cretaceous Cenomanian stage and goes extinct around the middle of that same stage. Species ''Acompsoceras'' is in the same family as '' Acanthoceras'', the Acanthoceratidae, and contains several species: * ''A. amphibolum'' * ''A. calabarense'' * ''A. essendiense'' * ''A. inconstans'' * ''A. renevieri'' Distribution Fossils of ''Acompsoceras'' have been found in Brazil, Colombia (Hiló Formation), Germany, Madagascar, Nigeria, the United Kingdom and Texas.''Acompsoceras'' at |
Acanthoscaphites
''Acanthoscaphites'' is an extinct genus of cephalopod belonging to the Ammonite subclass. The average diameter of its shell was approximately , but some specimens have been found with a diameter of slightly over . Classification ''Acanthoscaphites'' was first described by Schluter in 1872. Subsequent taxonomic revisions indicate that the relationship between ''Acanthoscaphites'' and ''Trachyscaphites'' is still unclear: ''Acanthoscaphites'' may have evolved in parallel with or as a derivative of ''Trachyscaphites''. Species *''A. plenus'' *''A. tridens'' *''A. verneuilianus'' Biogeography ''Acanthoscaphites'' was a widespread genus during Campanian and Maastrichtian The Maastrichtian () is, in the ICS geologic timescale, the latest age (uppermost stage) of the Late Cretaceous Epoch or Upper Cretaceous Series, the Cretaceous Period or System, and of the Mesozoic Era or Erathem. It spanned the interval ... times, approximately 80 million years ago. Its remains can b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acanthoplites
''Acanthohoplites'' is an extinct genus of ammonites in the family Parahoplitidae that lived in the Aptian and Early Albian stages of the Early Cretaceous. Taxonomy The taxonomic position in the ''Treatise on Invertebrate Paleontology'' Pt L, 1957 placed the genus into the family Deshayesitidae. Newer classifications have revised that placement and the genus is now included into the family Parahoplitidae. '' Parahoplites'' and '' Hypacanthoplites'' are similar genera. Description These ammonites have a strongly ribbed shell and ammonitic suture. Early whorls are coronate, which later become round, then oval in section. Primary ribs may have swellings (bullae) at the umbilicus or are without. In early stages primary ribs branch mid flank at prominent lateral tubercles. In later stages lateral tubercles are reduced or absent and primary ribs branch simply at the umbilical shoulder or, again, mid flank. Sutural elements are subquadrate with narrow, shallow embayments. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acanthopleuroceras
''Acanthopleuroceras'' is an extinct genus of cephalopod belonging to the Ammonite Ammonoids are a group of extinct marine mollusc animals in the subclass Ammonoidea of the class Cephalopoda. These molluscs, commonly referred to as ammonites, are more closely related to living coleoids (i.e., octopuses, squid and cuttlefish) ... subclass. References Early Jurassic ammonites Jurassic ammonites of North America Pliensbachian life Eoderoceratoidea Ammonitida genera {{Ammonitina-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acantholytoceras
''Acantholytoceras'' is an extinct genus of cephalopod belonging to the ammonite Ammonoids are a group of extinct marine mollusc animals in the subclass Ammonoidea of the class Cephalopoda. These molluscs, commonly referred to as ammonites, are more closely related to living coleoids (i.e., octopuses, squid and cuttlefish) ... subclass. References Ammonitida genera Crioceratitidae Cretaceous ammonites of Europe {{Ammonitida-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acanthohoplites
''Acanthohoplites'' is an extinct genus of ammonites in the family Parahoplitidae that lived in the Aptian and Early Albian stages of the Early Cretaceous. Taxonomy The taxonomic position in the ''Treatise on Invertebrate Paleontology'' Pt L, 1957 placed the genus into the family Deshayesitidae. Newer classifications have revised that placement and the genus is now included into the family Parahoplitidae. '' Parahoplites'' and '' Hypacanthoplites'' are similar genera. Description These ammonites have a strongly ribbed shell and ammonitic suture. Early whorls are coronate, which later become round, then oval in section. Primary ribs may have swellings (bullae) at the umbilicus or are without. In early stages primary ribs branch mid flank at prominent lateral tubercles. In later stages lateral tubercles are reduced or absent and primary ribs branch simply at the umbilical shoulder or, again, mid flank. Sutural elements are subquadrate with narrow, shallow embayments. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
