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Cherokee Pebblesnail
The Cherokee pebblesnail (''Somatogyrus georgianus'') is a species of very small freshwater snail with an Operculum (gastropod), operculum. It is an aquatic gastropod mollusc in the family (biology), family Lithoglyphidae. Distribution This species is Endemism, endemic to the Tennessee River, Tennessee, Cahaba River, Cahaba and Alabama Rivers in Alabama and Chattanooga River in Georgia (U.S. state), Georgia in the United States. Assessment of its conservation status is encumbered by the difficulty in differentiating the various species of ''Somatogyrus'' from one another. References External links Walker, B. (1904). New species of Somatogyrus. The Nautilus. 17(12): 133-142, pl. 5 Johnson, P. D.; Bogan, A. E.; Brown, K. M.; Burkhead, N. M.; Cordeiro, J. R.; Garner, J. T.; Hartfield, P. D.; Lepitzki, D. A. W.; Mackie, G. L.; Tarpley, T. A.; Tiemann, J. S.; Whelan, N. V.; Strong, E. E. (2013). Conservation status of freshwater gastropods of Canada and the United States. Fisheries ... [...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] |
Cahaba River
The Cahaba River is the longest substantially free-flowing river in Alabama and is among the most scenic and biologically diverse rivers in the United States. It is a major tributary of the Alabama River and part of the larger Mobile River basin. With headwaters near Birmingham, the Cahaba flows southwest, then at Heiberger turns southeast and joins the Alabama River at the ghost town and former Alabama capital of Cahaba in Dallas County. Entirely within central Alabama, the Cahaba River is longU.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map, accessed April 27, 2011 and drains an area of . Geography The Cahaba River flows across three physiographic provinces of the state: Appalachian Plateau, Ridge and Valley, and Coastal Plain. The Mobile River basin has the largest Gulf Coast drainage basin east of the Mississippi River, and the Cahaba is one of the seven river systems that contribute to its flow. The mean discharge of wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endemic Molluscs Of The United States
Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsewhere. For example, the Cape sugarbird is found exclusively in southwestern South Africa and is therefore said to be ''endemic'' to that particular part of the world. An endemic species can be also be referred to as an ''endemism'' or in scientific literature as an ''endemite''. For example '' Cytisus aeolicus'' is an endemite of the Italian flora. ''Adzharia renschi'' was once believed to be an endemite of the Caucasus, but it was later discovered to be a non-indigenous species from South America belonging to a different genus. The extreme opposite of an endemic species is one with a cosmopolitan distribution, having a global or widespread range. A rare alternative term for a species that is endemic is "precinctive", which applies to sp ... [...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] |
Georgia (U
Georgia most commonly refers to: * Georgia (country), a country in the Caucasus region of Eurasia * Georgia (U.S. state), a state in the Southeast United States Georgia may also refer to: Places Historical states and entities * Related to the country in the Caucasus ** Kingdom of Georgia, a medieval kingdom ** Georgia within the Russian Empire ** Democratic Republic of Georgia, established following the Russian Revolution ** Georgian Soviet Socialist Republic, a constituent of the Soviet Union * Related to the US state ** Province of Georgia, one of the thirteen American colonies established by Great Britain in what became the United States ** Georgia in the American Civil War, the State of Georgia within the Confederate States of America. Other places * 359 Georgia, an asteroid * New Georgia, Solomon Islands * South Georgia and the South Sandwich Islands Canada * Georgia Street, in Vancouver, British Columbia, Canada * Strait of Georgia, British Columbia, Canada ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chattanooga River
The Chattooga River (also spelled Chatooga, Chatuga, and Chautaga, variant name Guinekelokee River) is the main tributary of the Tugaloo River. Water course The headwaters of the Chattooga River are located southwest of Cashiers, North Carolina, and it stretches U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map, accessed April 26, 2011 to its confluence with the Tallulah River within Lake Tugalo, which was created by the Tugalo Dam. The Chattooga begins in southern Jackson County, North Carolina, and flows southwestward between northwestern Oconee County, South Carolina, and eastern Rabun County, Georgia. The "Chattooga" spelling was approved by the US Board on Geographic Names in 1897. The Chattooga and the Tallulah rivers combine to make the Tugaloo River, which is considered to start at the outlet of Lake Tugalo. Downriver from the Tugaloo's confluence with the Seneca River, it is known as the Savannah River below Lake Hartw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alabama
(We dare defend our rights) , anthem = " Alabama" , image_map = Alabama in United States.svg , seat = Montgomery , LargestCity = Huntsville , LargestCounty = Baldwin County , LargestMetro = Greater Birmingham , area_total_km2 = 135,765 , area_total_sq_mi = 52,419 , area_land_km2 = 131,426 , area_land_sq_mi = 50,744 , area_water_km2 = 4,338 , area_water_sq_mi = 1,675 , area_water_percent = 3.2 , area_rank = 30th , length_km = 531 , length_mi = 330 , width_km = 305 , width_mi = 190 , Latitude = 30°11' N to 35° N , Longitude = 84°53' W to 88°28' W , elevation_m = 150 , elevation_ft = 500 , elevation_max_m = 735.5 , elevation_max_ft = 2,413 , elevation_max_point = Mount Cheaha , elevation_min_m = 0 , elevation_min_ft = 0 , elevation_min_point = Gulf of Mexico , OfficialLang = English , Languages = * English 95.1% * Spanish 3.1% , population_demonyms = Alabamian (We dare defend our rights) , anthem = "Alabama (state song), Alabama" , i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alabama River
The Alabama River, in the U.S. state of Alabama, is formed by the Tallapoosa and Coosa rivers, which unite about north of Montgomery, near the town of Wetumpka. The river flows west to Selma, then southwest until, about from Mobile, it unites with the Tombigbee, forming the Mobile and Tensaw rivers, which discharge into Mobile Bay. Description The run of the Alabama is highly meandering. Its width varies from , and its depth from . Its length as measured by the United States Geological Survey is ,U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map, accessed April 27, 2011 and by steamboat measurement, . The river crosses the richest agricultural and timber districts of the state. Railways connect it with the mineral regions of north-central Alabama. After the Coosa and Tallapoosa rivers, the principal tributary of the Alabama is the Cahaba River, which is about long and joins the Alabama River about below Selma. The ... [...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] |
Species
In biology, a species is the basic unit of Taxonomy (biology), classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can reproduction, produce Fertility, fertile offspring, typically by sexual reproduction. Other ways of defining species include their karyotype, DNA sequence, morphology (biology), morphology, behaviour or ecological niche. In addition, paleontologists use the concept of the chronospecies since fossil reproduction cannot be examined. The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million. However, only about 14% of these had been described by 2011. All species (except viruses) are given a binomial nomenclature, two-part name, a "binomial". The first part of a binomial is the genus to which the species belongs. The second part is called the specifi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endemism
Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsewhere. For example, the Cape sugarbird is found exclusively in southwestern South Africa and is therefore said to be ''endemic'' to that particular part of the world. An endemic species can be also be referred to as an ''endemism'' or in scientific literature as an ''endemite''. For example ''Cytisus aeolicus'' is an endemite of the Italian flora. ''Adzharia renschi'' was once believed to be an endemite of the Caucasus, but it was later discovered to be a non-indigenous species from South America belonging to a different genus. The extreme opposite of an endemic species is one with a cosmopolitan distribution, having a global or widespread range. A rare alternative term for a species that is endemic is "precinctive", which applies t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lithoglyphidae
Lithoglyphidae is a family of small freshwater snails with gills and an operculum, aquatic gastropod mollusks. This family is in the superfamily Truncatelloidea and in the clade Littorinimorpha (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005). Taxonomy Taylor (1966), Ponder & Warén (1988) and Kabat & Hershler (1993)Kabat A. R. & Hershler R. (1993). "The prosobranch snail family Hydrobiidae (Gastropoda: Rissooidea): review of classification and supraspecific taxa". ''Smithsonian Contributions to Zoology'' 547: 1-94PDF considered this taxon as a subfamily Lithoglyphinae within Hydrobiidae. Radoman (1983) considered Lithoglyphidae as a separate family. Bernasconi (1992) considered this taxon as a tribe Lithoglyphini in the Hydrobiinae within Hydrobiidae. 2005 taxonomy The family Lithoglyphidae consists of 2 subfamilies according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005. It follows Wilke et al. (2001), Hausdorf et al. (2003) and includ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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