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Orconectes Sheltae
''Orconectes sheltae'', the Shelta Cave crayfish, is a small, freshwater crayfish endemic to Alabama in the United States. It is a cave-dwelling species known from only one cave, Shelta Cave in Madison County, Alabama Madison County is a County (United States), county located in the north central portion of the U.S. state of Alabama. As of the 2020 United States census, 2020 Census, the population was 388,153, and according to a 2023 population estimate the .... This cave is also home to '' O. australis'' and '' Cambarus jonesi''. It was first discovered in 1963, before being formally described in 1997. The last cave survey to successfully locate the species was in 1988, and therefore it was considered as being extinct for over 30 years until its rediscovery in 2019. References * Cambaridae Cave crayfish Freshwater crustaceans of North America Crustaceans described in 1997 Endemic crustaceans of the United States Endemic fauna of Alabama {{crayfish-stub ...
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Crayfish
Crayfish are freshwater crustaceans belonging to the infraorder Astacidea, which also contains lobsters. Taxonomically, they are members of the superfamilies Astacoidea and Parastacoidea. They breathe through feather-like gills. Some species are found in brooks and streams, where fresh water is running, while others thrive in swamps, ditches, and paddy fields. Most crayfish cannot tolerate polluted water, although some species, such as '' Procambarus clarkii'', are hardier. Crayfish feed on animals and plants, either living or decomposing, and detritus. The term "crayfish" is applied to saltwater species in some countries. Terminology The name "crayfish" comes from the Old French word ' ( Modern French '). The word has been modified to "crayfish" by association with "fish" ( French language">Modern French '). The word has been modified to "crayfish" by association with "fish" ( American variant "crawfish" is similarly derived. Some kinds of crayfish are known lo ...
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Endemism
Endemism is the state of a species being found only 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 also be referred to as an ''endemism'' or, in scientific literature, as an ''endemite''. Similarly, many species found in the Western ghats of India are examples of endemism. Endemism is an important concept in conservation biology for measuring biodiversity in a particular place and evaluating the risk of extinction for species. Endemism is also of interest in evolutionary biology, because it provides clues about how changes in the environment cause species to undergo range shifts (potentially expanding their range into a larger area or b ...
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Alabama
Alabama ( ) is a U.S. state, state in the Southeastern United States, Southeastern and Deep South, Deep Southern regions of the United States. It borders Tennessee to the north, Georgia (U.S. state), Georgia to the east, Florida and the Gulf of Mexico to the south, and Mississippi to the west. Alabama is the List of U.S. states and territories by area, 30th largest by area, and the List of U.S. states and territories by population, 24th-most populous of the List of states and territories of the United States, 50 U.S. states. Alabama is nicknamed the ''Northern flicker, Yellowhammer State'', after the List of U.S. state birds, state bird. Alabama is also known as the "Heart of Dixie" and the "Cotton State". The state has diverse geography, with the north dominated by the mountainous Tennessee Valley and the south by Mobile Bay, a historically significant port. Alabama's capital is Montgomery, Alabama, Montgomery, and its largest city by population and area is Huntsville, Ala ...
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Shelta Cave
Shelta Cave is a cave and lake located in Huntsville, Madison County, Alabama, United States. It is described as one of the most bio-diverse caves within the Appalachian Mountains. The cave is currently owned and managed as a nature preserve by the National Speleological Society, with their main offices directly above the cave. It was declared a National Natural Landmark in October 1972. History This cave was an underground bar and dance hall in the early 1900s. Speleology and wildlife The cave is open to members of the NSS during certain times of the year to minimize the impact on the biome. There are now three sinkhole entrances. The lake can be as large as during the winter and early spring rainy season. Other times of the year, the lake bed is exposed. There are nine species which were first discovered in this cave. The Shelta Cave crayfish is endemic Endemism is the state of a species being found only in a single defined geographic location, such as an island, s ...
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Madison County, Alabama
Madison County is a County (United States), county located in the north central portion of the U.S. state of Alabama. As of the 2020 United States census, 2020 Census, the population was 388,153, and according to a 2023 population estimate the county has become the second-most populous county in Alabama after only Jefferson County, Alabama, Jefferson County, home to Birmingham. Its county seat is Huntsville, Alabama, Huntsville. Since the mid-20th century it has become an area of defense and space research and industry. The county is named in honor of James Madison, fourth President of the United States and the first President to visit the state of Alabama. Madison County covers parts of the former Decatur County, Alabama, Decatur County. Madison County is included in the Huntsville, Alabama Huntsville Metropolitan Area, Metropolitan Statistical Area. History Madison County was established on December 13, 1808, by the governor of the Mississippi Territory. It is recognized as t ...
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Orconectes Australis
''Orconectes australis'', the southern cave crayfish, is a species of crayfish in the Cambaridae family found in Alabama and Tennessee Tennessee (, ), officially the State of Tennessee, is a landlocked U.S. state, state in the Southeastern United States, Southeastern region of the United States. It borders Kentucky to the north, Virginia to the northeast, North Carolina t .... Ages of 176 years have been claimed for ''O. australis'', though this was reduced to ≤22 years in a 2012 study. References Cambaridae Freshwater crustaceans of North America Crustaceans described in 1941 Cave crayfish {{crayfish-stub ...
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Cambarus Jonesi
''Cambarus jonesi'', the Alabama cave crayfish, is a small, freshwater crayfish endemic to Alabama in the United States. It is an underground species known only from 12 caves. Distribution The Alabama cave crayfish is known from cave systems in the Tennessee River basin between Florence and Guntersville. It has been found in Colbert, Limestone, Lauderdale, Madison, and Morgan Morgan may refer to: Arts and entertainment * ''Morgan – A Suitable Case for Treatment'', also called ''Morgan!'', a 1966 comedy film * ''Morgan'' (2012 film), an American drama * ''Morgan'' (2016 film), an American science fiction thriller * ... counties in Alabama. Specimens from Marshall County, formerly thought to be this species, actually represent two distinct species, '' Cambarus speleocoopi'' and '' Cambarus laconensis'' Etymology The name ''jonesi'' honors Walter B. Jones. References Cambaridae Cave crayfish Endemic fauna of Alabama Endemic crustaceans of the United States Fres ...
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Cambaridae
The Cambaridae are the largest of the four families of freshwater crayfish, with over 400 species. Most of the species in the family are native to the United States east of the Great Divide and Mexico, but fewer range north to Canada, and south to Guatemala and Honduras. Three live on the island of Cuba. The species in the genus '' Cambaroides'' are only found outside North America, as they are restricted to eastern Asia. A few species, including the invasive '' Procambarus clarkii'' and '' Faxonius rusticus'', have been introduced to regions far outside their native range (both in North America and other continents). Conversely, many species have tiny ranges and are seriously threatened; a few are already extinct. A 2006 molecular study suggested that the family Cambaridae may be paraphyletic, with the family Astacidae nested within it, and the status of the genus ''Cambaroides'' remains unclear. The oldest fossils of the family are known from the Late Jurassic Morrison Form ...
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Cave Crayfish
Caves or caverns are natural voids under the Earth's surface. Caves often form by the weathering of rock and often extend deep underground. Exogene caves are smaller openings that extend a relatively short distance underground (such as rock shelters). Caves which extend further underground than the opening is wide are called endogene caves. Speleology is the science of exploration and study of all aspects of caves and the cave environment. Visiting or exploring caves for recreation may be called ''caving'', ''potholing'', or ''spelunking''. Formation types The formation and development of caves is known as ''speleogenesis''; it can occur over the course of millions of years. Caves can range widely in size, and are formed by various geological processes. These may involve a combination of chemical processes, erosion by water, tectonic forces, microorganisms, pressure, and atmospheric influences. Isotopic dating techniques can be applied to cave sediments, to determine the time ...
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Freshwater Crustaceans Of North America
Fresh water or freshwater is any naturally occurring liquid or frozen water containing low concentrations of dissolved salts and other total dissolved solids. The term excludes seawater and brackish water, but it does include non-salty mineral-rich waters, such as chalybeate springs. Fresh water may encompass frozen and meltwater in ice sheets, ice caps, glaciers, snowfields and icebergs, natural precipitations such as rainfall, snowfall, hail/ sleet and graupel, and surface runoffs that form inland bodies of water such as wetlands, ponds, lakes, rivers, streams, as well as groundwater contained in aquifers, subterranean rivers and lakes. Water is critical to the survival of all living organisms. Many organisms can thrive on salt water, but the great majority of vascular plants and most insects, amphibians, reptiles, mammals and birds need fresh water to survive. Fresh water is the water resource that is of the most and immediate use to humans. Fresh water is not always pot ...
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Crustaceans Described In 1997
Crustaceans (from Latin meaning: "those with shells" or "crusted ones") are invertebrate animals that constitute one group of arthropods that are traditionally a part of the subphylum Crustacea (), a large, diverse group of mainly aquatic arthropods including decapods (shrimps, prawns, crabs, lobsters and crayfish), seed shrimp, branchiopods, fish lice, krill, remipedes, isopods, barnacles, copepods, opossum shrimps, amphipods and mantis shrimp. The crustacean group can be treated as a subphylum under the clade Mandibulata. It is now well accepted that the hexapods (insects and entognathans) emerged deep in the Crustacean group, with the completed pan-group referred to as Pancrustacea. The three classes Cephalocarida, Branchiopoda and Remipedia are more closely related to the hexapods than they are to any of the other crustaceans ( oligostracans and multicrustaceans). The 67,000 described species range in size from ''Stygotantulus stocki'' at , to the Japanese spider crab with ...
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Endemic Crustaceans Of The United States
Endemism is the state of a species being found only 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 also be referred to as an ''endemism'' or, in scientific literature, as an ''endemite''. Similarly, many species found in the Western ghats of India are examples of endemism. Endemism is an important concept in conservation biology for measuring biodiversity in a particular place and evaluating the risk of extinction for species. Endemism is also of interest in evolutionary biology, because it provides clues about how changes in the environment cause species to undergo range shifts (potentially expanding their range into a larger area or becoming ...
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