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Pachydiscidae
Pachydiscidae is a family of middle and upper Cretaceous ammonites in the superfamily Desmoceratoidea. Morphology Pachydiscidae species are moderate to large in size, evolute to rather involute, and vary in section from inflated and depressed to high-whorled and compressed. They are distinguished from the Desmoceratidae by strong ribbing at some growth stage, that normally crosses the venter uninterrupted, and by the tendency to develop strong tuberculation, at least on the umbilical shoulder. Pachydischidae evolved from Desmoceratidea, during the Lower Cenomanian, about the same time as the Kossmaticeratidae, but lived further into the Maastrichtian, virtually to the end of the Cretaceous. Genera * '' Anapachydiscus'' Yabe and Shimizu, 1926 * '' Baskaniceras'' Wright and Kennedy, 1984 * '' Canadoceras'' Spath, 1922 * '' Eopachydiscus'' Wright, 1955 * ''Eupachydiscus'' Spath, 1922 * '' Lewesiceras'' Spath, 1939 * '' Menuites'' Spath, 1922 * '' Nowakites'' * ''Pachydiscus'' Zi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Urakawites
''Urakawites'' is an extinct ammonite from the Upper Cretaceous (Campanian) of Japan, Sakhalin, Russia, British Columbia, Canada and possibly Germany and Angola. ''Urakawites'' is placed in the family is Pachydiscidae Pachydiscidae is a family of middle and upper Cretaceous ammonites in the superfamily Desmoceratoidea. Morphology Pachydiscidae species are moderate to large in size, evolute to rather involute, and vary in section from inflated and depressed to .... ''Urakawites'' is characterized by a bituberculate (meaning it has two rows of tubercles on either side), strongly ribbed, moderately compressed shell. References * Arkell, et al., 1957. Mesozoic Ammonoidea. Treatise on Invertebrate Paleontology Part L. Geol Soc of America and Univ Kansas Press. R.C. Moore ed. * Matsumoto, T. 1955. The bituberculate pachydiscids from Hokkaido and Saghalien. Studies on the Cretaceous ammonites from Hokkaido and Sakhalin 8. Memoirs of the Faculty of Science, Kyushu University, Series ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eupachydiscus
''Eupachydisus'' is a large, coarse-ribbed Pachydiscid ammonite genus from the Upper Cretaceous, found in Coniacian to Campanian age strata in Europe, Madagascar, Japan, and British Columbia. The whorl section in ''Eupachydiscus'' is inflated and depressed, almost round in the later growth stages. Ribs are narrow but prominent in the early whorls, becoming thick and strong in the later. ''Eupachydiscus'' is distinct from the mostly later, Campanian - Maastrichtian, compressed and high-whorled ''Pachydiscus'', but somewhat similar to the coeval, inflated and coarse ribbed, Coniacian-Santonian The Santonian is an age in the geologic timescale or a chronostratigraphic stage. It is a subdivision of the Late Cretaceous Epoch or Upper Cretaceous Series. It spans the time between 86.3 ± 0.7 mya (million years ago) and 83.6 ± 0.7 mya. The ..., '' Pachydiscoides'' Species * '' Eupachydiscus isculensis'' † Redtenbacher 1873 * '' Eupachydiscus macoveii'' † Szaisz 1981 * '' E ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pachydiscus
''Pachydiscus'' is an extinct genus of ammonite from the Late Cretaceous and Early Paleocene with a worldwide distribution, and type for the desmoceratacean family Pachydiscidae. The genus' type species is ''P. neubergicus''. Altogether some 28 species have been described. The shell of ''Pachydiscus'' is compressed and high-whorled, with an oval or flat sided section. Ribs tend to be differentiated into short umbilical and separate ventro-lateral sets, with a smooth area between. Some Hungarian specimens of this genus reached in diameter. ''Pachydiscus'' includes two subgenera, ''P. (Pachysiscus)'' from the Campanian in which the ribs persist, and ''P. (Neodesmoceras)'' from the Maastrichtian in which ribs disappear early, leaving an almost smooth shell. Biostratigraphic significance The International Commission on Stratigraphy (ICS) has assigned the First Appearance Datum of ''Pachydiscus neubergicus'' as the defining biological marker for the start of the Maastrichtian Sta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Desmoceratoidea
Desmoceratoidea, formerly Desmocerataceae, is a superfamily of Cretaceous ammonites, generally with round or oval-whorled shells that are mostly smooth or weakly ribbed and rarely tuberculate, but commonly with constrictions. a Paleobiology database retrieved on July 8, 2012. with and (1996), ''Mollusca 4 Revised , Cretaceous Ammonoidea'', vol. 4, in ''Treatise on Invertebrate Paleontology'', Part L (Roger L. Kaesler et el. eds.), Boulder, Colorado: The Geological Society of America & Lawrence, Kansas: University of Kansas Press, 67-111. Regarded as monophyletic, the Desmocerataceae are derived from the |
Anapachydiscus
''Anapachydiscus'' is an extinct cephalopod genus from the Upper Cretaceous, Santonian - Maastrichtian of Europe, Africa, Madagascar, S.India, N Z, Calif. Mexico, Argentina, and the Antarctic belonging to the ammonoid family Pachydiscidae. ''Anapachydiscus'' has a rather involute shell with a broad to moderately compressed whorl section. Early whorls smooth, intermediary develop straight or slightly curved, radial ribs that thicken toward the umbilicus. Outer whorls may again be smooth, or have coarse ribs so as to resemble ''Eupachydiscus ''Eupachydisus'' is a large, coarse-ribbed Pachydiscid ammonite genus from the Upper Cretaceous, found in Coniacian to Campanian age strata in Europe, Madagascar, Japan, and British Columbia. The whorl section in ''Eupachydiscus'' is inflated ...''. References *Treatise on invertebrate Paleontology, Part L, Mollusca 4. Mesozoic Ammonoidea. Geological Society of America and Univ. Kansas Press (1957)''Anapachydiscus''-Paleodb5/02/11 L ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lewesiceras
''Lewesiceras'' is a genus of large ammonites belonging to the order Ammonitida and the family Pachydiscidae. They lived in the late Cretaceous period, in the Cenomanian and Turonian ages, which occurred 99.6-89.3 million years ago. These shelled ammonoids were nektonic, fast-moving and carnivorous. Fossils distribution Cretaceous of Armenia, France, Germany, United States (Texas), Uzbekistan. Species * ''Lewesiceras mantelli'' Wright and Wright, 1951 * ''Lewesiceras peramplum'' ( Mantell, 1822) * ''Lewesiceras wiedmanni'' Wright & Kennedy, 1984 Gallery File:Lewesiceras peramplum.jpg, ''Lewesiceras peramplum'', a pachydiscid ammonite from Upper Turonian of Poland File:Gasteropods - Ammonites - Lewesiceras cornicostatus.JPG, ''Lewesiceras cornicostatus'', from Czech Republic, at the National Museum (Prague) File:Amonit Lewesiceras.jpg, ''Lewesiceras sharpei'', from Czech Republic The Czech Republic, or simply Czechia, is a landlocked country in Central Europe. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Austria
Austria, , bar, Östareich officially the Republic of Austria, is a country in the southern part of Central Europe, lying in the Eastern Alps. It is a federation of nine states, one of which is the capital, Vienna, the most populous city and state. A landlocked country, Austria is bordered by Germany to the northwest, the Czech Republic to the north, Slovakia to the northeast, Hungary to the east, Slovenia and Italy to the south, and Switzerland and Liechtenstein to the west. The country occupies an area of and has a population of 9 million. Austria emerged from the remnants of the Eastern and Hungarian March at the end of the first millennium. Originally a margraviate of Bavaria, it developed into a duchy of the Holy Roman Empire in 1156 and was later made an archduchy in 1453. In the 16th century, Vienna began serving as the empire's administrative capital and Austria thus became the heartland of the Habsburg monarchy. After the dissolution of the H ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Belgium
Belgium, ; french: Belgique ; german: Belgien officially the Kingdom of Belgium, is a country in Northwestern Europe. The country is bordered by the Netherlands to the north, Germany to the east, Luxembourg to the southeast, France to the southwest, and the North Sea to the northwest. It covers an area of and has a population of more than 11.5 million, making it the 22nd most densely populated country in the world and the 6th most densely populated country in Europe, with a density of . Belgium is part of an area known as the Low Countries, historically a somewhat larger region than the Benelux group of states, as it also included parts of northern France. The capital and largest city is Brussels; other major cities are Antwerp, Ghent, Charleroi, Liège, Bruges, Namur, and Leuven. Belgium is a sovereign state and a federal constitutional monarchy with a parliamentary system. Its institutional organization is complex and is structured on both regional ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brazil
Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over 217 million people, Brazil is the world's fifth-largest country by area and the seventh most populous. Its capital is Brasília, and its most populous city is São Paulo. The federation is composed of the union of the 26 States of Brazil, states and the Federal District (Brazil), Federal District. It is the largest country to have Portuguese language, Portuguese as an List of territorial entities where Portuguese is an official language, official language and the only one in the Americas; one of the most Multiculturalism, multicultural and ethnically diverse nations, due to over a century of mass Immigration to Brazil, immigration from around the world; and the most populous Catholic Church by country, Roman Catholic-majority country. Bounded by the Atlantic Ocean on the east, Brazil has a Coastline of Brazi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chile
Chile, officially the Republic of Chile, is a country in the western part of South America. It is the southernmost country in the world, and the closest to Antarctica, occupying a long and narrow strip of land between the Andes to the east and the Pacific Ocean to the west. Chile covers an area of , with a population of 17.5 million as of 2017. It shares land borders with Peru to the north, Bolivia to the north-east, Argentina to the east, and the Drake Passage in the far south. Chile also controls the Pacific islands of Juan Fernández, Isla Salas y Gómez, Desventuradas, and Easter Island in Oceania. It also claims about of Antarctica under the Chilean Antarctic Territory. The country's capital and largest city is Santiago, and its national language is Spanish. Spain conquered and colonized the region in the mid-16th century, replacing Inca rule, but failing to conquer the independent Mapuche who inhabited what is now south-central Chile. In 1818, after declaring in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bulgaria
Bulgaria (; bg, България, Bǎlgariya), officially the Republic of Bulgaria,, ) is a country in Southeast Europe. It is situated on the eastern flank of the Balkans, and is bordered by Romania to the north, Serbia and North Macedonia to the west, Greece and Turkey to the south, and the Black Sea to the east. Bulgaria covers a territory of , and is the sixteenth-largest country in Europe. Sofia is the nation's capital and largest city; other major cities are Plovdiv, Varna and Burgas. One of the earliest societies in the lands of modern-day Bulgaria was the Neolithic Karanovo culture, which dates back to 6,500 BC. In the 6th to 3rd century BC the region was a battleground for ancient Thracians, Persians, Celts and Macedonians; stability came when the Roman Empire conquered the region in AD 45. After the Roman state splintered, tribal invasions in the region resumed. Around the 6th century, these territories were settled by the early Slavs. The Bulgars, led by Asp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Armenia
Armenia (), , group=pron officially the Republic of Armenia,, is a landlocked country in the Armenian Highlands of Western Asia.The UNbr>classification of world regions places Armenia in Western Asia; the CIA World Factbook , , and ''Oxford Reference Online'' also place Armenia in Asia. It is a part of the Caucasus region; and is bordered by Turkey to the west, Georgia to the north, the Lachin corridor (under a Russian peacekeeping force) and Azerbaijan to the east, and Iran and the Azerbaijani exclave of Nakhchivan to the south. Yerevan is the capital, largest city and the financial center. Armenia is a unitary, multi-party, democratic nation-state with an ancient cultural heritage. The first Armenian state of Urartu was established in 860 BC, and by the 6th century BC it was replaced by the Satrapy of Armenia. The Kingdom of Armenia reached its height under Tigranes the Great in the 1st century BC and in the year 301 became the first state in the world to adopt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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