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Uhligella
''Uhligella'' is an extinct cephalopod genus from the Early Cretaceous ( Late Aptian to Early Albian), belonging to the ammonoid subclass and included in the Desmoceratidae. ''Uhligella'' is described as being high-whorled with a broadly or narrowly rounded venter, in which the early whorls have strong or weak sinuous ribs but the outer whorls are smooth. ''Uhligella'' may have given rise to ''Beudanticeras'' and is preceded by another related genus, ''Zurcherella''. Distribution Fossils of ''Uhligella'' have been found in Argentina, Colombia (Hiló Formation, Tolima and in La Guajira), France, Madagascar, Mexico, Morocco, the United Kingdom, the United States (Arkansas), and Venezuela.''Uhligella'' at |
Zurcherella
''Zurcherella'' is a Lower Cretaceous (Upper Barremian - Upper Aptian desmoceratid ammonite from France and Colombia ( Apón and Yuruma Formations, La Guajira).''Zurcherella'' at .org Its shell is moderately compressed and rather involute (outer whorls covering most of the inner), with fine sinuous ribs that arise some distance above the umbilical rim. ''Zurcherella'' differs from its descendant '' Uhligella
''Uhligella'' is an extinct cephalopod genus from the Early Cretaceous ( Late Aptian to Early Albian), belonging to the ammonoi ...
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Beudanticeras
''Beudanticeras'' is an extinct cephalopod genus from the Late Cretaceous period; Albian and Cenomanian, belonging to the ammonoid subclass and included in the family Desmoceratidae. ''Beudanticeras'' has a rather to very compressed shell that is moderately involute, with convex to flat sides and a narrowly arched out rim. Coiling is such that the outer whorl embraces much of the next inner whorl, leaving a small spiraled umbilicus. The shell is generally smooth but may have weak ribs but no tubercles. The suture is ammonitic. The derivation of ''Beudanticeras'' may be from ''Uhligella'', although ''Uhligella'' is partly contemporary with early ''Beudanticeras''. Other related genera include ''Beudantiella'', '' Brewericeras'', ''Zurcherella'', and possibly '' Pseudosaynella''. Species The following species of ''Beudanticeras'' have been recognised: * ''B. alamoense'' * ''B. arduennense'' * ''B. argonauticum'' * ''B. beudanti'' * ''B. flindersi'' * ''B. hirtzi'' * ''B. ingen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cretaceous
The Cretaceous ( ) is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest. At around 79 million years, it is the longest geological period of the entire Phanerozoic. The name is derived from the Latin ''creta'', "chalk", which is abundant in the latter half of the period. It is usually abbreviated K, for its German translation ''Kreide''. The Cretaceous was a period with a relatively warm climate, resulting in high eustatic sea levels that created numerous shallow inland seas. These oceans and seas were populated with now- extinct marine reptiles, ammonites, and rudists, while dinosaurs continued to dominate on land. The world was ice free, and forests extended to the poles. During this time, new groups of mammals and birds appeared. During the Early Cretaceous, flowering plants appeared and began to rapidly diversify, becoming the dominant group of plants across the Earth b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cretaceous Africa
The Cretaceous ( ) is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest. At around 79 million years, it is the longest geological period of the entire Phanerozoic. The name is derived from the Latin ''creta'', "chalk", which is abundant in the latter half of the period. It is usually abbreviated K, for its German translation ''Kreide''. The Cretaceous was a period with a relatively warm climate, resulting in high eustatic sea levels that created numerous shallow inland seas. These oceans and seas were populated with now-extinct marine reptiles, ammonites, and rudists, while dinosaurs continued to dominate on land. The world was ice free, and forests extended to the poles. During this time, new groups of mammals and birds appeared. During the Early Cretaceous, flowering plants appeared and began to rapidly diversify, becoming the dominant group of plants across the Earth by t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fossil Taxa Described In 1907
A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in amber, hair, petrified wood and DNA remnants. The totality of fossils is known as the ''fossil record''. Paleontology is the study of fossils: their age, method of formation, and evolutionary significance. Specimens are usually considered to be fossils if they are over 10,000 years old. The oldest fossils are around 3.48 billion years old to 4.1 billion years old. Early edition, published online before print. The observation in the 19th century that certain fossils were associated with certain rock strata led to the recognition of a geological timescale and the relative ages of different fossils. The development of radiometric dating techniques in the early 20th century allowed scientists to quantitatively measure the absolute ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
