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Hoplitoidea
Hoplitoidea, formerly Hoplitaceae, is a superfamily of mostly Upper Cretaceous ammonites comprising families united by a similar suture pattern with multiple similar elements that tend to decrease in size going toward the umbilicus, at the inner edge of any whorl, and which are typically in a straight line. Sutural elements are commonly ammonitic, but in some saddles and in others both saddles and lobes are smooth and undivided. Shells are variable in form, both ribbed, evolute forms and smooth, involute forms are included.Arkell et al 1957. Mesozoic Ammonoidea; Treatise on Invertebrate Paleontology, Part L. Families regarded as part now include the Engonoceratidae, Hoplitidae, Placenticeratidae, and Schloenbachiidae. Some classifications however include the Forbesiceridae in place of the Engonoceratidae The older version of the Treatise includes in addition to the five families already mentioned, the Pulchelliidae, Trochleiceratidae, Douvilleiceratidae, D ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Engonoceratidae
Engonoceratidae is a family of typically compressed, more or less flat sided and involute ammonites (cephalopod order Ammonitida) from the mid Cretaceous belonging to the Hoplitoidea. shells have flat sided outer rims ( venters), at least in some stage. Single or branching irregular ribs and variably placed tubercles may occur. Sutures have numerous auxiliary and adventive elements of similar form, in general radially arranged. Forwardly divergent saddles tend to be simple, without subdivision. Lobes, pointing apically, may be simple and undivided or may be frilled with short irregular serrations. Some classifications go so far as to put the Engonoceratidae in its own superfamily, the Engonoceratoidea (.i.e. Engonocerataceae) although its direct descendant the Placenticeratidae is retained in the Hoplitoidea. The Engonoceratidae first appear in the lower Albian. Origin in the Desheyesitidae has been suggested, but seems unlikely even without the Desheyesitidae being removed to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hoplitidae
The Hoplitidae is a family of Cretaceous ammonites that lived during the middle of the period from the late Aptian to the Cenomanian. They are part of the superfamily Hoplitoidea. Members of the Hoplitidae are typically evolute, with inner whorls exposed, although some are more involute, and are commonly stout and strongly ribbed, with pronounced tubercles. The Hoplitidae are thought to be derived from the U Aptian -M Albian '' Uligella'' of the Desmoceratidae, or some related form and have been divided into three subfamilies. Subtaxa Classification of Hoplitidae was revised multiple times during last decades. Currently, is contains 3 subfamilies:Amédro, F., Matrion, B., Magniez-Jannin, F., & Touch, R. (2014). La limite Albien inférieur-Albien moyen dans l’Albien type de l’Aube (France): ammonites, foraminifères, séquences. Revue de Paléobiologie, 33(1), 159-279. * Gastroplitinae ** '' Freboldiceras'' ** ''Arcthoplites'' ** ?'' Sokolovites'' ** '' Pseudopulchellia'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hoplitoidea
Hoplitoidea, formerly Hoplitaceae, is a superfamily of mostly Upper Cretaceous ammonites comprising families united by a similar suture pattern with multiple similar elements that tend to decrease in size going toward the umbilicus, at the inner edge of any whorl, and which are typically in a straight line. Sutural elements are commonly ammonitic, but in some saddles and in others both saddles and lobes are smooth and undivided. Shells are variable in form, both ribbed, evolute forms and smooth, involute forms are included.Arkell et al 1957. Mesozoic Ammonoidea; Treatise on Invertebrate Paleontology, Part L. Families regarded as part now include the Engonoceratidae, Hoplitidae, Placenticeratidae, and Schloenbachiidae. Some classifications however include the Forbesiceridae in place of the Engonoceratidae The older version of the Treatise includes in addition to the five families already mentioned, the Pulchelliidae, Trochleiceratidae, Douvilleiceratidae, D ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Placenticeratidae
Placenticeratidae is an extinct family of mostly Late Cretaceous ammonites ( cephalopod order Ammonitida) included in the superfamily Hoplitoidea, derived from the Engonoceratidae by an increase in suture complexity. Placeticeratids are characterized by rather involute compressed shells of moderate to large size with narrow flat or grooved venters (outer rims), at least on early whorls. Most are rather smooth or weakly ornamented except for a few later forms in which the outer whorls are strongly tuberculate. The suture has numerous, including auxiliary and adventive, elements. Saddles and lobes are typically deep, narrow necked, and raggedly embayed. The Placenticeratidae had their beginning in the Late Albian stage at the end of the Early Cretaceous, starting with '' Hypengonoceras''. The type genus, '' Placenticeras'', appears later and is known from the upper Santonian to the lower Campanian of the Upper Cretaceous. The family has the longest duration of the Hoplitaceae, exte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Schloenbachiidae
Shloenbachiidae is a family of hoplitoid ammonoid cephalopds mostly from the lower Upper Cretaceous, (U Albian - Cenomanian). Shloenbachiidae can be recognized by their usually keel bearing, irregularly ribbed and tuberculate shells that vary from evolute to rather involute and compressed to inflated. Tubercles are concentrated on the umbilical and ventrolateral shoulders. The suture, similar in all members, is ammonitic; raggedy with spikey subdivided lobes and irregularly subdivided saddles. The Schloenbachiidae first appeared near the end of the Albian, beginning with '' Schloenbachia'', derived from the hoplitid genus '' Pleurohoplites'' or perhaps '' Lepthoplites'', just before the beginning of the Late Cretaceous. References * Arkell ''et al.'', 1957. Mesozoic Ammonoidea; Treatise on Invertebrate Paleontology, Part L (Ammonoidea). Geol. Soc. of America and Univ. Kansas Press. Hoplitoidea Ammonitida families Albian first appearances Cenomanian extinctions { ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ammonitida Superfamilies
Ammonitida is an order of ammonoid cephalopods that lived from the Jurassic through Paleocene time periods, commonly with intricate ammonitic sutures. Ammonitida is divided into four suborders, the Phylloceratina, Lytoceratina, Ancyloceratina, and Ammonitina. The Phylloceratina is the ancestral stock, derived from the Ceratitida near the end of the Triassic. The Phylloceratina gave rise to the Lytoceratina near the beginning of the Jurassic which in turn gave rise to the highly specialized Ancyloceratina near the end of the Jurassic. Both the Phylloceratina and Lytoceratina gave rise to various stocks combined in the Ammonitina. These four suborders are further divided into different stocks, comprising various families combined into superfamilies. Some like the Hildoceratoidea and Stephanoceratoidea are restricted to the Jurassic. Others like the Hoplitoidea and Acanthoceratoidea are known only from the Cretaceous. Still others like the Perisphinctoidea are found in both. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leymeriellidae
Leymeriellidae is a family of Lower Cretaceous ammonites comprising rather small forms distinguished from Hoplitidae by their flattened and grooved ribs and virtual absence of umbilical tubercles. The family is derived from the Desmoceratidae. '' Leymeriella schrammeni anterior'' has evolved from '' Desmoceras keilhacki keilhacki''.BERT, D. Les ammonites du niveau Paquier (Albien basal, Crétacé inférieur) du Sud-Est de la France. Fossiles, 2012, 12: 4-25. Taxonomic position Leymeriellidae are currently regarded is belonging to the Acanthoceratoidea according to W. J. Kennedy ''et al'' (1980). The previous placement was in the Hoplitoidea according to W.J. Arkell ''et al'' (1957) in the '' Treatise on Invertebrate Paleontology, Part L''. Genera Leymeriellidae includes the following genera: *'' Leymeriella'' Jacob 1907. Shell evolute, venter flat to sulcate. Ribs single, wide spaced, grooved in outer part. ''Lower Albian to Middle Albian The Albian is both an age of the ge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Upper Cretaceous
The Late Cretaceous (100.5–66 Ma) is the younger of two epochs into which the Cretaceous Period is divided in the geologic time scale. Rock strata from this epoch form the Upper Cretaceous Series. The Cretaceous is named after ''creta'', the Latin word for the white limestone known as chalk. The chalk of northern France and the white cliffs of south-eastern England date from the Cretaceous Period. Climate During the Late Cretaceous, the climate was warmer than present, although throughout the period a cooling trend is evident. The tropics became restricted to equatorial regions and northern latitudes experienced markedly more seasonal climatic conditions. Geography Due to plate tectonics, the Americas were gradually moving westward, causing the Atlantic Ocean to expand. The Western Interior Seaway divided North America into eastern and western halves; Appalachia and Laramidia. India maintained a northward course towards Asia. In the Southern Hemisphere, Australia and Anta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prehistoric Animal Superfamilies
Prehistory, also known as pre-literary history, is the period of human history between the use of the first stone tools by hominins 3.3 million years ago and the beginning of recorded history with the invention of writing systems. The use of symbols, marks, and images appears very early among humans, but the earliest known writing systems appeared 5000 years ago. It took thousands of years for writing systems to be widely adopted, with writing spreading to almost all cultures by the 19th century. The end of prehistory therefore came at very different times in different places, and the term is less often used in discussing societies where prehistory ended relatively recently. In the early Bronze Age, Sumer in Mesopotamia, the Indus Valley Civilisation, and ancient Egypt were the first civilizations to develop their own scripts and to keep historical records, with their neighbors following. Most other civilizations reached the end of prehistory during the following Iron Age. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pulchelliidae
''Pulchelliidae'' is an extinct ammonoid cephalopod family. 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, p. 111. It was previously classified as belonging to the superfamily Endemoceratoidea. They lived during the Cretaceous, in the Barremian age. Subfamilies and genera * '' Buergliceratinae'' * '' Psilotissotiinae'' * '' Pulchelliinae'' (Vermeulen 1995) ** '' Nicklesia'' (Hyatt) ** '' Pulchellia'' (Uhlid) ** ''Gerhardtia'' (Hyatt) ** '' Coronites'' (Hyatt) ** '' Curiolites'' (Vermeulen) ** ''Heinzia'' (Sayn) Distribution Fossils of species within this genus have been found in the 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 lon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Douvilleiceratidae
Douvilleiceratidae is a family of ammonites. These fast-moving nektonic carnivores lived in the Cretaceous from 125.45 to 94.3 Ma. Its fossils have been found in Angola, Brazil, Canada, Colombia, the Dominican Republic, France, Germany, India, Iran, Italy, Japan, Madagascar, Mexico, Morocco, Peru, South Africa, Spain, Switzerland, Russia, the United Kingdom, United States and Venezuela. Subfamilies and genera * Cheloniceratinae Spath, 1923 ** '' Cheloniceras'' Hyatt, 1903 ** '' Procheloniceras'' Spath, 1923 * Douvilleiceratinae Parona and Bonarelli, 1987 ** ''Douvilleiceras ''Douvilleiceras'' is a genus of ammonites from the Cretaceous, Middle to Late Cretaceous. Its fossils have been found worldwide, in Africa, Asia, Europe, and North America, North and South America. Description Shells of ''Douvilleiceras inaequi ...'' Grossouvre, 1894 * Roloboceratinae Casey, 1961 ** '' Roloboceras'' References Ammonitida families Ancyloceratina Cretaceous ammonites {{Cr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
