|
Glyptodendron
''Glyptodendron'' is a Lower Silurian westonocerid characterized by compressed cyrtocones with a narrowly rounded dorsum and greatest width in the ventrolateral region. Sutures slope forward from the dorsum which is on the longitudinally concave side. The siphuncle is slightly ventral from the center. Segments are subspherical in the young; equally broad but shorter in the adult. No endosiphuncular deposits are known. The surface of the shell is covered by obliquely intersecting rows of scale-like pits. It was first described by E. W. Claypole as part of a "tree-like fossil plant" thought to be similar to '' Lepidodendron''. The type material is from Eaton in Preble County, Ohio. Its generic etymology is modified from the Greek ''glypto'' (γλύφω) for "I engrave" and it "alludes to the depressed areoles" which Claypole erroneously interpreted from the superficial pits across the shell as being similar to those seen in lycopsid plants. Its specific epithet refers to it the lo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Nautiloids
This list of nautiloids is a comprehensive listing of all genera that have ever been included in the subclass Nautiloidea, excluding purely vernacular terms. The list includes all commonly accepted genera, but also genera that are now considered invalid, 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 nautiloids. Most of the listed genera are found in Part K of the ''Treatise on Invertebrate Paleontology''. Some, added since the year of publication (1964) are found simply in various scientific journals and special publications. The named genera are based on type specimens which are housed in various museums and other academic institutions worldwide, available to interested researchers. Note that ''Allonautilus'' and ''Nautilus'' are the only extant genera. A *†'' Acanthonautilus'' *†'' Acaroceras'' *†'' Acleistoceras'' *†'' Acrosphaerorthoceras' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Westonoceratidae
Westonoceratidae are exogastric, mostly compressed, Discosorida of moderate size from the Middle Ordovician to the Lower Silurian. The siphuncle is typically close to the convexly curved outer margin of the phragmocone – the chambered part of the shell – taken to be ventral but may be more central in some genera. Connecting rings are thin to moderately thick with inflated bullettes grasping the previous septal foremina. Parietal deposits within the siphuncle from endocones in advanced genera and cameral deposits are found in some. The Westonoceratidae are derived from the Cyrtogomphoceratidae through the cyrtogomphoceratid, '' Ulrichoceras''. In turn, the Westonoceratidae gave rise to a small group of discosorids, the Lowoceratidae, which form an intermediary step before the Discosoridae. Two principal lineages have been identified, both stemming from the genus '' Teichertoceras'', a derivative of ''Ulrichoceras''. One goes simply from '' Westonoceras'' to '' Winnipeg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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. The Silurian is the shortest period of the Paleozoic Era. As with other geologic periods, the rock beds that define the period's start and end are well identified, but the exact dates are uncertain by a few million years. The base of the Silurian is set at a series of major Ordovician–Silurian extinction events when up to 60% of marine genera were wiped out. One important event in this period was the initial establishment of terrestrial life in what is known as the Silurian-Devonian Terrestrial Revolution: vascular plants emerged from more primitive land plants, dikaryan fungi started expanding and diversifying along with glomeromycotan fungi, and three groups of arthropods (myriapods, arachnids and hexapods) became fully terrestrialized. A significant evolutionary milestone during ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lepidodendron
''Lepidodendron'' is an extinct genus of primitive vascular plants belonging to the family Lepidodendraceae, part of a group of Lycopodiopsida known as scale trees or arborescent lycophytes, related to Isoetes, quillworts and Lycopodiopsida, lycopsids (club mosses). They were part of the coal forest flora. They sometimes reached heights of , and the trunks were often over in diameter. They thrived during the Carboniferous Period (358.9 to 298.9 million years ago). Sometimes erroneously called "giant club mosses", the genus was actually more closely related to modern quillworts than to modern club mosses. Within the form classification system used within paleobotany, ''Lepidodendron'' is both used for the whole plant as well as specifically the stems and leaves. Etymology The name ''Lepidodendron'' comes from the Greek language, Greek wikt:λεπίς, λεπίς ', scale, and wikt:δένδρον, δένδρον ''dendron'', tree. Growth During the early stages of growth, ''L ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eaton, Ohio
Eaton is a city in, and the county seat of Preble County, Ohio, United States, approximately 24 mi (38 km) west of Dayton. The population was 8,375 at the 2020 census, down 0.4% from the population of 8,407 at the 2010 census. Eaton's sister city is Rödental bei Coburg (Germany). History Eaton was founded and platted in 1806 by William Bruce. The village derives its name from Gen. William Eaton (1764–1811), the U.S. Consul at Tunis, who led a diverse army in a harrowing march from Egypt to Tripoli to meet the U.S. Naval forces. In addition to the city of Eaton and the county of Preble, various streets in Eaton (Barron, Decatur, Israel, Wadsworth, and Somers) were named in honor of heroes of the First Barbary War and the Second Barbary War. The town grew quickly following its establishment. In 1846, the town first had 1000 inhabitants. This growth was primarily derived from the town's location at the strategic junction of two turnpikes. In 1849, Eaton was the site ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Preble County
Preble County is a County (United States), county located in the U.S. state of Ohio. As of the 2020 United States Census, 2020 census, the population was 40,999, down 3.0% from the 2010 United States Census, 2010 census population of 42,270. Its county seat is Eaton, Ohio, Eaton. The county was formed on February 15, 1808, from portions of Butler County, Ohio, Butler and Montgomery County, Ohio, Montgomery Counties. It is List of Ohio county name etymologies, named for Edward Preble, a naval officer who fought in the American Revolutionary War and against the Barbary pirates#Barbary pirates and the U.S. Navy, Barbary Pirates. Geography According to the U.S. Census Bureau, the county has a total area of , of which is land and (0.5%) is water. Adjacent counties * Darke County, Ohio, Darke County (north) * Montgomery County, Ohio, Montgomery County (east) * Butler County, Ohio, Butler County (south) * Union County, Indiana (southwest) * Wayne County, Indiana (northwest) Rivers a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ohio
Ohio () is a state in the Midwestern region of the United States. Of the fifty U.S. states, it is the 34th-largest by area, and with a population of nearly 11.8 million, is the seventh-most populous and tenth-most densely populated. The state's capital and largest city is Columbus, with the Columbus metro area, Greater Cincinnati, and Greater Cleveland being the largest metropolitan areas. Ohio is bordered by Lake Erie to the north, Pennsylvania to the east, West Virginia to the southeast, Kentucky to the southwest, Indiana to the west, and Michigan to the northwest. Ohio is historically known as the "Buckeye State" after its Ohio buckeye trees, and Ohioans are also known as "Buckeyes". Its state flag is the only non-rectangular flag of all the U.S. states. Ohio takes its name from the Ohio River, which in turn originated from the Seneca word ''ohiːyo'', meaning "good river", "great river", or "large creek". The state arose from the lands west of the Appalachian Mountai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
August Foerste
August F. Foerste (1862–1936) was an American geologist, science teacher, and paleontologist. Biography Foerste was born on May 7, 1862, in Dayton, Ohio. He studied geology at Denison University, from which he received a bachelor's degree in 1887. Later, he got master's degree at Harvard University in 1888, and PhD in 1890. He served as an assistant for the United States Geological Survey, in Harvard, in which he studied stratigraphy and petrography of New England. After his graduation from Harvard, he studied at the Heidelberg University and College de France for two years. He returned to Dayton in 1893 and became a science teacher at Robert W Steele High School, a position which he kept till his retirement in 1932. In 1896, 1897, and 1899 he spent his summer vacations in Indiana, while conducting geological surveys. In 1908 and 1919 he spent his summers in Ohio, doing his geological surveys there as well. From 1904 to 1912 he was in Kentucky conducting a geological survey; ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cyrtoceras
''Cyrtoceras'' is an extinct genus of oncoceridan nautiloids that lived from the middle Ordovician to the middle Devonian, in Africa, Europe, North America and South America South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere at the northern tip of the continent. It can also be described as the southe .... References Sources *''Fossils'' (Smithsonian Handbooks) by David Ward *''Fossils'' (A Golden Guide from St. Martin's Press) by Frank H. T. Rhodes, Paul R. Shaffer, Herbert S. Zim, and Raymond Perlman *''Aquagenesis: The Origin and Evolution of Life in the Sea'' by Richard Ellis External links''Cyrtoceras''in the Paleobiology Database Prehistoric nautiloid genera Devonian cephalopods Ordovician cephalopods Paleozoic cephalopods of Africa Paleozoic cephalopods of Europe Paleozoic cephalopods of North America Paleozoic cephalopods of South Amer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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. The prehistoric invertebrates are described as to their taxonomy, morphology, paleoecology, stratigraphic and paleogeographic range. However, taxa with no fossil record whatsoever have just a very brief listing. Publication of the decades-long ''Treatise on Invertebrate Paleontology'' is a work-in-progress; and therefore it is not yet complete: For example, there is no volume yet published regarding the post-Paleozoic era caenogastropods (a molluscan group including the whelk and Common periwinkle, periwinkle). Furthermore, every so often, previously published volumes of the ''Treatise'' are revised. Evolution of the proje ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prehistoric Nautiloid Genera
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] |
.jpg "Click for more on -> Eaton, Ohio")
