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Quadrate Pebblesnail
The quadrate pebblesnail, scientific name ''Somatogyrus quadratus'', is a species of small freshwater snail with a gill and an operculum, an aquatic gastropod mollusc in the family Lithoglyphidae. This species is endemic to Alabama in the United States. Its natural habitat is rivers. This species is possibly extinct because there is no recent survey information. It is known to have had a very restricted distribution and there had been a habitat disturbance. This species was endemic to the Tennessee River system and was known to exist from Muscle Shoals and adjacent Shoal Creek, Lauderdale County, Alabama. It has not been reported since the river was impounded. Based on the fact that the species has not been observed since the dams were constructed, it is widely believed that that change in habitat possibly caused the species's extinction Extinction is the termination of a kind of organism or of a group of kinds ( taxon), usually a species. The moment of extinct ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bryant Walker
Bryant Walker (1856–1936) was an American malacologist who specialized in the non-marine Mollusca. He mainly studied the freshwater mollusks of the USA, in particular those of Michigan. He published many papers on the Unionida, an order of freshwater mussels. Taxa Walker named numerous taxa of freshwater gastropods and bivalves, including: Gastropods *''Neoplanorbis carinatus'' Walker, 1908 *†''Neoplanorbis smithi †''Neoplanorbis smithi'' was a species of small freshwater snail, an aquatic gastropod mollusk in the family Planorbidae, the ramshorn snails. This species was endemic to the United States; it is now extinct Extinction is the terminati ...'' Walker, 1908 Publications A partial list of his publications*Ortmann, A.E., and B. Walker 1912. A new North American naiad. Nautilus 25(9):97-100 + 1 plate. *Ortmann, A.E., and B. Walker 1922. A new genus and species of American naiades. Nautilus 36(1):1-6 + 1 plate. *Ortmann, A.E., and B. Walker. 1922. On the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
River
A river is a natural flowing watercourse, usually freshwater Fresh water or freshwater is any naturally occurring liquid or frozen water containing low concentrations of dissolved salts and other total dissolved solids. Although the term specifically excludes seawater and brackish water, it does include ..., flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without reaching another body of water. Small rivers can be referred to using names such as Stream#Creek, creek, Stream#Brook, brook, rivulet, and rill. There are no official definitions for the generic term river as applied to Geographical feature, geographic features, although in some countries or communities a stream is defined by its size. Many names for small rivers are specific to geographic location; examples are "run" in some parts of the United States, "Burn (landform), burn" in Scotland and northeast England, and "be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gastropods Described In 1906
The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, from freshwater, and from land. There are many thousands of species of sea snails and slugs, as well as freshwater snails, freshwater limpets, and land snails and slugs. The class Gastropoda contains a vast total of named species, second only to the insects in overall number. The fossil history of this class goes back to the Late Cambrian. , 721 families of gastropods are known, of which 245 are extinct and appear only in the fossil record, while 476 are currently extant with or without a fossil record. Gastropoda (previously known as univalves and sometimes spelled "Gasteropoda") are a major part of the phylum Mollusca, and are the most highly diversified class in the phylum, with 65,000 to 80,000 living snail and slug species. The anatomy, behavior, feeding, and reproduct ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Somatogyrus
''Somatogyrus'' is a genus of very small freshwater and brackish water snails that have an operculum, aquatic gastropod micromolluscs in the family Lithoglyphidae. Species Species within the genus ''Somatogyrus'' include: * Reverse pebblesnail, '' Somatogyrus alcoviensis'' * '' Somatogyrus aldrichi'' (W) * Ouachita pebblesnail, '' Somatogyrus amnicoloides'' * Golden pebblesnail, ''Somatogyrus aureus'' * Angular pebblesnail, '' Somatogyrus biangulatus'' * Knotty pebblesnail, ''Somatogyrus constrictus'' * Coosa pebblesnail, ''Somatogyrus coosaensis'' * Thick-lipped pebblesnail, ''Somatogyrus crassilabris'' * Stocky pebblesnail, ''Somatogyrus crassus'' * Tennessee pebblesnail, ''Somatogyrus currierianus'' * Hidden pebblesnail, ''Somatogyrus decipiens'' * Sandbar pebblesnail, '' Somatogyrus depressus'' * Ovate pebblesnail, '' Somatogyrus excavatus'' * Cherokee pebblesnail, '' Somatogyrus georgianus'' * Fluted pebblesnail, '' Somatogyrus hendersoni'' * Granite pe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Molluscs Of The United States
Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is estimated between 60,000 and 100,000 additional species. The proportion of undescribed species is very high. Many taxa remain poorly studied. Molluscs are the largest marine phylum, comprising about 23% of all the named marine organisms. Numerous molluscs also live in freshwater and terrestrial habitats. They are highly diverse, not just in size and anatomical structure, but also in behaviour and habitat. The phylum is typically divided into 7 or 8 taxonomic classes, of which two are entirely extinct. Cephalopod molluscs, such as squid, cuttlefish, and octopuses, are among the most neurologically advanced of all invertebrates—and either the giant squid or the colossal squid is the largest known invertebrate species. The gastropo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Extinction
Extinction is the termination of a kind of organism or of a group of kinds ( taxon), usually a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and recover may have been lost before this point. Because a species' potential range may be very large, determining this moment is difficult, and is usually done retrospectively. This difficulty leads to phenomena such as Lazarus taxa, where a species presumed extinct abruptly "reappears" (typically in the fossil record) after a period of apparent absence. More than 99% of all species that ever lived on Earth, amounting to over five billion species, are estimated to have died out. It is estimated that there are currently around 8.7 million species of eukaryote globally, and possibly many times more if microorganisms, like bacteria, are included. Notable extinct animal species include non-avian dinosaurs, saber-toothed cats, dod ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Dams And Reservoirs Of The Tennessee River
The Tennessee Valley Authority operates the Tennessee River system to provide a wide range of public benefits: year-round navigation, flood damage reduction, affordable electricity, improved water quality and water supply, recreation, and economic growth. The TVA established the stairway of nine dams and locks that turned the Tennessee River into a 652-mile-long river highway. Dams and reservoirs on the main stem of the river include the following (listed from the farthest upstream to the farthest downstream): * Fort Loudoun Dam impounds Fort Loudoun Lake * Watts Bar Dam impounds Watts Bar Lake * Chickamauga Dam impounds Chickamauga Lake * Nickajack Dam impounds Nickajack Lake * Guntersville Dam impounds Guntersville Lake * Wheeler Dam impounds Wheeler Lake * Wilson Dam impounds Wilson Lake * Pickwick Landing Dam impounds Pickwick Lake * Kentucky Dam impounds Kentucky Lake Tributary dams and reservoirs include: * Apalachia Dam on the Hiwassee River forms Apalac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lauderdale County, Alabama
Lauderdale County is a county located in the northwestern corner of the U.S. state of Alabama. At the 2020 census the population was 93,564. Its county seat is Florence. Its name is in honor of Colonel James Lauderdale, of Tennessee. Lauderdale is part of the Florence- Muscle Shoals, AL Metropolitan Statistical Area, also known as " The Shoals". History Lauderdale County was named in honor of Col. James Lauderdale who was born in Virginia in about 1780. In the early 19th century, Lauderdale, who moved to West Tennessee, became a major in General John Coffee's cavalry of volunteers. Later promoted to lieutenant colonel, he commanded a brigade of mounted riflemen, serving under Andrew Jackson. According to reliable historians, Col. Lauderdale did not die in the Battle of New Orleans, but was wounded in the Battle of Talladega and died on December 23, 1814, seventeen days before Jackson's decisive defeat of the British at New Orleans. Several towns and counties in the southern ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shoal Creek (Tennessee River)
Shoal Creek (originally called the Sycamore River) is a river from its east point or from the north point on the Little Shoal Creek north of Lawrenceburg, Tennessee. The stream rises in northern Lawrence County, Tennessee, and enters the Tennessee River in Lauderdale County, Alabama, where its lower reaches are impounded in the backwater of Wilson Dam. Historically, Shoal Creek (Sycamore River) was an important source of water power for the cotton industry in Lawrence County. Among the early users of the stream's water power was David Crockett, who settled near the creek bank in 1817 and started a powder mill, grist mill and distillery. After these operations were destroyed by a flood in September 1821, Crockett left the area and moved to West Tennessee. The Crockett-Shoals region of Tennessee, including Lawrence County and surrounding areas, is named for Shoal Creek and this famous frontiersman who played an active role in establishing Lawrence County and Lawrenceburg. This his ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Muscle Shoals, Alabama
Muscle Shoals is the largest city in Colbert County, Alabama, United States. It is located along the Tennessee River in the northern part of the state and, as of the 2010 census, the population of Muscle Shoals was 13,146. The estimated population in 2019 was 14,575. Both the city and the Florence-Muscle Shoals Metropolitan Area (including four cities in Colbert and Lauderdale counties) are commonly called "the Shoals". Northwest Alabama Regional Airport serves the Shoals region, located in the northwest section of the state. Due to its strategic location along the Tennessee River, Muscle Shoals had long been territory of Native American tribes. In the late 18th and early 19th centuries, as Europeans entered the area in greater number, it became a center of historic land disputes. The new state of Georgia had ambitions to anchor its western claims (to the Mississippi River) by encouraging European-American development here, but that project did not succeed. Under Presiden ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tennessee River
The Tennessee River is the largest tributary of the Ohio River. It is approximately long and is located in the southeastern United States in the Tennessee Valley. The river was once popularly known as the Cherokee River, among other names, as the Cherokee people had their homelands along its banks, especially in what are now East Tennessee and northern Alabama. Additionally, its tributary, the Little Tennessee River, flows into it from Western North Carolina and northeastern Georgia, where the river also was bordered by numerous Cherokee towns. Its current name is derived from the Cherokee town, '' Tanasi'', which was located on the Tennessee side of the Appalachian Mountains. Course The Tennessee River is formed at the confluence of the Holston and French Broad rivers in present-day Knoxville, Tennessee. From Knoxville, it flows southwest through East Tennessee into Chattanooga before crossing into Alabama. It travels through the Huntsville and Decatur area before re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Extinction
Extinction is the termination of a kind of organism or of a group of kinds ( taxon), usually a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and recover may have been lost before this point. Because a species' potential range may be very large, determining this moment is difficult, and is usually done retrospectively. This difficulty leads to phenomena such as Lazarus taxa, where a species presumed extinct abruptly "reappears" (typically in the fossil record) after a period of apparent absence. More than 99% of all species that ever lived on Earth, amounting to over five billion species, are estimated to have died out. It is estimated that there are currently around 8.7 million species of eukaryote globally, and possibly many times more if microorganisms, like bacteria, are included. Notable extinct animal species include non-avian dinosaurs, saber-toothed cats, dod ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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