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Procambarus Lucifugus Alachua
''Procambarus lucifugus alachua'', known as the Alachua light-fleeing cave crayfish, is one of two subspecies of the vampire crayfish (''Procambarus lucifugus''), along with ''Procambarus lucifugus lucifugus ''Procambarus lucifugus lucifugus'', known as the Withlocoochee light-fleeing cave crayfish, is one of two subspecies of the vampire crayfish (''Procambarus lucifugus''), along with '' Procambarus lucifugus alachua''. It is distinct from ''P. l. ...''. It is distinct from ''P. l. lucifugus'' due its eyespots. Distribution ''Procambarus lucifugus alachua'' is found in subterranean waters of 2-3 dozen caves, 11 of are in Alachua or Gilchrist Counties. It is also known to occur in caves in Marion County, Florida, where it interbreeds to form intergrades with ''P. l. lucifugus''. References {{Taxonbar, from=Q49460625 Subspecies Cambaridae Cave crayfish Crustaceans described in 1940 Taxa named by Horton H. Hobbs Jr. Endemic fauna of Florida Endemic crustaceans o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Horton H
Horton may refer to: Places Antarctica * Horton Glacier, Adelaide Island, Antarctica * Horton Ledge, Queen Elizabeth Land, Antarctica Australia * Horton, Queensland, a town and locality in the Bundaberg Region * Horton River (Australia), in northern New South Wales Canada * Horton, Ontario, a township * Horton River (Canada), a tributary of the Beaufort Sea * Horton Township, Nova Scotia, an 18th-century township; see Wolfville United Kingdom * Horton Beach, Port Eynon Bay, Wales * Horton, Berkshire, a village and civil parish * Horton, Buckinghamshire, a hamlet of Ivinghoe * Horton or Horton by Malpas, Cheshire, a village and former civil parish * Horton, Dorset, a village and civil parish ** Horton Priory, its ruined religious house upon which the parish church was built * Horton, Gloucestershire, a village * Horton, Lancashire, a village and civil parish * Horton, Northamptonshire, a village * Horton, Blyth, Northumberland, a village * Horton, Chatton, a pair ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Procambarus Lucifugus
''Procambarus lucifugus'', the Florida cave crayfish, vampire crayfish, or light-fleeing cave crayfish, is a troglomorphic freshwater crayfish Crayfish are freshwater crustaceans belonging to the clade Astacidea, which also contains lobsters. In some locations, they are also known as crawfish, craydids, crawdaddies, crawdads, freshwater lobsters, mountain lobsters, rock lobsters, mu ... endemic to 20-25 occurrences (likely more) in an arc of caves 80 km long in 6 Florida counties. There are two sub-species described; *'' Procambarus lucifugus lucifugus'' *'' Procambarus lucifugus alachua'' The two sub-species are known to form intergrades in the range where they overlap. References Cambaridae Cave crayfish Freshwater crustaceans of North America Crustaceans described in 1940 Endemic fauna of Florida Taxa named by Horton H. Hobbs Jr. {{crayfish-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Procambarus Lucifugus Lucifugus
''Procambarus lucifugus lucifugus'', known as the Withlocoochee light-fleeing cave crayfish, is one of two subspecies of the vampire crayfish (''Procambarus lucifugus''), along with '' Procambarus lucifugus alachua''. It is distinct from ''P. l. alachua'' due its lack of eyespots. Intergrades of the two ''P. lucifugus'' subspecies, ''P. l. alachua'' as well as '' P. erythrops'' and '' P. leitheuseri'' have been found to have little genetic differentiation, especially when compared to ''P. l. lucifugus'' which is distinct from all of those. It has been suggested that ''P. l. lucifugus'' may prove to be a different species, found only in two freshwater caves, the location of one of which is unknown. Distribution ''Procambarus lucifugus lucifugus'' is only found in subterranean waters of two caves, one of which is the Gum Cave, about 7 miles (11.2 km) southwest of Floral City in Citrus County, Florida. It is also known to occur in a cave in the Hernando County, northward to Mar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eyespot (mimicry)
An eyespot (sometimes ocellus) is an eye-like marking. They are found in butterflies, reptiles, cats, birds and fish. Eyespots could be explained in at least three different ways. They may be a form of mimicry in which a spot on the body of an animal resembles an eye of a different animal, to deceive potential predator or prey species. They may be a form of self-mimicry, to draw a predator's attention away from the prey's most vulnerable body parts. Or they may serve to make the prey appear inedible or dangerous. Eyespot markings may play a role in intraspecies communication or courtship; the best-known example is probably the eyespots on a peacock's display feathers. The pattern-forming biological process (morphogenesis) of eyespots in a wide variety of animals is controlled by a small number of genes active in embryonic development, including the genes called Engrailed, Distal-less, Hedgehog, Antennapedia, and the Notch signaling pathway. Artificial eyespots have been show ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alachua County, Florida
Alachua County ( ) is a county in the north central portion of the U.S. state of Florida. As of the 2020 census, the population was 278,468. The county seat is Gainesville, the home of the University of Florida since 1906, when the campus opened with 106 students. Alachua County is part of the Gainesville Metropolitan Statistical Area. The county is known for its diverse culture, local music, and artisans. Much of its economy revolves around the university, which had nearly 55,000 students in the fall of 2016. History Early history The first people known to have entered the area of Alachua County were Paleo-Indians, who left artifacts in the Santa Fe River basin before 8000 BCE. Artifacts from the Archaic period (8000 - 2000 BCE) have been found at several sites in Alachua County. Permanent settlements appeared in what is now Alachua County around 100 CE, as people of the wide-ranging Deptford culture developed the local Cades Pond culture. The Cades Pond culture ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gilchrist County, Florida
Gilchrist County is a county located in the north central part of the U.S. state of Florida. Organized in 1925 from the western part of Alachua, it is the last county to be formed in the state. As of the 2020 census, the population was 17,864. The county seat is Trenton. Gilchrist County is included in the Gainesville, FL Metropolitan Statistical Area. History Gilchrist County was created in 1925, the last county organized in Florida. It was named for Albert W. Gilchrist, Governor of Florida from 1909 to 1913. It was formed by residents of what was then western Alachua County, as they believed they were not getting adequate representation on the county commission. With the poor roads of the time, they felt it took too long to get to the county seat of Gainesville. They disagreed about a proposed law that would require fencing in cattle in the rural area. They also believed that they would be better off by getting their own share of racetrack revenues, which the state dis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marion County, Florida
Marion County is located in the northern portion of the U.S. state of Florida. As of the 2020 census, the population was 375,908. Its county seat is Ocala. Marion County comprises the Ocala, FL Metropolitan Statistical Area. it includes part of Ocala National Forest, which also extends into three other counties. History Native Americans Evidence of ancient indigenous cultures has been found in Marion County, as well as of the earliest encounter between European explorers and historic indigenous peoples. In 1976, an archaeological investigation found ancient artifacts in Marion County that appear to be the oldest in mainland United States. Excavations at an ancient stone quarry (on the Container Corporation of America site (8Mf154) in Marion County) yielded "crude stone implements". Thousands of pieces of chert were found at the site. These showed signs of extensive wear and were found in deposits below those holding Paleo-Indian artifacts. Thermoluminescence dating and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Intergradation
In zoology, intergradation is the way in which two distinct subspecies are connected via areas where populations are found that have the characteristics of both. There are two types of intergradation: primary and secondary intergradation. Primary intergradation This occurs in cases where two subspecies are connected via one or more intermediate populations, each of which is in turn intermediate to its adjacent populations and exhibits more or less the same amount of variability as any other population within the species. Adjacent populations and subspecies are subject to cline intergradation, and in these situations it is usually taken for granted that the clines are causally related (by natural selection) to environmental gradients.Mayr E, Ashlock PD (1991). ''Principles of Systematic Zoology''. Second edition. McGraw-Hill. . Secondary intergradation When contact between a geographically isolated subspecies is reestablished with the main body of the species or with another ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subspecies
In biological classification, subspecies is a rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics ( morphology), but that can successfully interbreed. Not all species have subspecies, but for those that do there must be at least two. Subspecies is abbreviated subsp. or ssp. and the singular and plural forms are the same ("the subspecies is" or "the subspecies are"). In zoology, under the International Code of Zoological Nomenclature, the subspecies is the only taxonomic rank below that of species that can receive a name. In botany and mycology, under the International Code of Nomenclature for algae, fungi, and plants, other infraspecific ranks, such as variety, may be named. In bacteriology and virology, under standard bacterial nomenclature and virus nomenclature, there are recommendations but not strict requirements for recognizing other important infraspecific ranks. A taxonomist decides w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 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 the 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 Astacidae is a family of freshwater crayfish native to Europe and western North America. The family is made up of four extant (living) genera: The genera '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cave Crayfish
A cave or cavern is a natural void in the ground, specifically a space large enough for a human to enter. Caves often form by the weathering of rock and often extend deep underground. The word ''cave'' can refer to smaller openings such as sea caves, rock shelters, and grottos, that extend a relatively short distance into the rock and they are called ''exogene'' caves. 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, microorganism ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crustaceans Described In 1940
Crustaceans (Crustacea, ) form a large, diverse arthropod taxon which includes such animals as decapods, seed shrimp, branchiopods, fish lice, krill, remipedes, isopods, barnacles, copepods, 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 emerged deep in the Crustacean group, with the completed group referred to as Pancrustacea. Some crustaceans (Remipedia, Cephalocarida, Branchiopoda) are more closely related to insects and the other hexapods than they are to certain other crustaceans. The 67,000 described species range in size from '' Stygotantulus stocki'' at , to the Japanese spider crab with a leg span of up to and a mass of . Like other arthropods, crustaceans have an exoskeleton, which they moult to grow. They are distinguished from other groups of arthropods, such as insects, myriapods and chelicerates, by the possession of biramous (two-parted) limbs, and by their l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
