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Cambarus
''Cambarus'' is a large and diverse genus of crayfish from the United States and Canada. The adults range in size from about 5 centimeters (2 in) up to approximately 15 centimeters (6 in). Description The genus ''Cambarus'' is the second largest freshwater crayfish genus inhabiting the Northern Hemisphere, with only sixty fewer species than the genus ''Procambarus''. Though ''Cambarus'' are varied across species, the two terminal elements that make up the male form I gonopod form ninety degree angles with the central appendage, allowing for their identification. Unlike the genus ''Procambarus'' whose first pleopod tends to have three processes at the tip, ''Cambarus'' has only one or two. ''Cambarus'' reach 17–26 mm carapace lengths in their first year, while average adult carapace length ranges from 55–62 mm. As a genus containing nearly 100 species, ''Cambarus's'' coloration is variable. ''Cambarus bartonii'' is dark brown, while species like ''Cambarus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cambarus Jonesi
''Cambarus'' is a large and diverse genus of crayfish from the United States and Canada. The adults range in size from about 5 centimeters (2 in) up to approximately 15 centimeters (6 in). Description The genus ''Cambarus'' is the second largest freshwater crayfish genus inhabiting the Northern Hemisphere, with only sixty fewer species than the genus ''Procambarus''. Though ''Cambarus'' are varied across species, the two terminal elements that make up the male form I gonopod form ninety degree angles with the central appendage, allowing for their identification. Unlike the genus ''Procambarus'' whose first pleopod tends to have three processes at the tip, ''Cambarus'' has only one or two. ''Cambarus'' reach 17–26 mm carapace lengths in their first year, while average adult carapace length ranges from 55–62 mm. As a genus containing nearly 100 species, ''Cambarus's'' coloration is variable. ''Cambarus bartonii'' is dark brown, while species like ''Cambarus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cambarus Dubius
''Cambarus'' is a large and diverse genus of crayfish from the United States and Canada. The adults range in size from about 5 centimeters (2 in) up to approximately 15 centimeters (6 in). Description The genus ''Cambarus'' is the second largest freshwater crayfish genus inhabiting the Northern Hemisphere, with only sixty fewer species than the genus ''Procambarus''. Though ''Cambarus'' are varied across species, the two terminal elements that make up the male form I gonopod form ninety degree angles with the central appendage, allowing for their identification. Unlike the genus ''Procambarus'' whose first pleopod tends to have three processes at the tip, ''Cambarus'' has only one or two. ''Cambarus'' reach 17–26 mm carapace lengths in their first year, while average adult carapace length ranges from 55–62 mm. As a genus containing nearly 100 species, ''Cambarus's'' coloration is variable. '' Cambarus bartonii'' is dark brown, while species like '' Cam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cambarus Pauleyi
''Cambarus'' is a large and diverse genus of crayfish from the United States and Canada. The adults range in size from about 5 centimeters (2 in) up to approximately 15 centimeters (6 in). Description The genus ''Cambarus'' is the second largest freshwater crayfish genus inhabiting the Northern Hemisphere, with only sixty fewer species than the genus ''Procambarus''. Though ''Cambarus'' are varied across species, the two terminal elements that make up the male form I gonopod form ninety degree angles with the central appendage, allowing for their identification. Unlike the genus ''Procambarus'' whose first pleopod tends to have three processes at the tip, ''Cambarus'' has only one or two. ''Cambarus'' reach 17–26 mm carapace lengths in their first year, while average adult carapace length ranges from 55–62 mm. As a genus containing nearly 100 species, ''Cambarus's'' coloration is variable. '' Cambarus bartonii'' is dark brown, while species like '' Cam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cambarus Bartonii
''Cambarus bartonii'' is a species of crayfish native to eastern North America, where it is called the common crayfish or Appalachian brook crayfish. ''C. bartonii'' was the first crayfish to be described from North America, when Johan Christian Fabricius published it under the name ''Astacus bartonii'' in his 1798 work ''Supplementum entomologiae systematicae''. The locality where his specimen was captured is not known, but is thought to be near Philadelphia, Pennsylvania. ''C. bartonii'' lives in fast–flowing, cool, rocky streams as well as shallow lakes, and is found in the Canadian provinces of Ontario, Quebec and New Brunswick, and in the United States from Maine to Alabama. In the south of its range, ''C. bartonii'' is restricted to the Appalachian Mountains and their foothills. Colouration is usually plain dark brown, although mottling is occasionally seen, as is a saddle-shaped marking. Several subspecies of ''C. bartonii'' have been recognised, but it is unclear how ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cambarus Robustus
''Cambarus robustus'', known generally as the robust crayfish or Big Water crayfish, is a species of crayfish in the family 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 .... It is found in North America. The IUCN conservation status of ''Cambarus robustus'' is "LC", least concern, with no immediate threat to the species' survival. The population is stable. The IUCN status was reviewed in 2010. References Further reading * * * External links * Cambaridae Articles created by Qbugbot Crustaceans described in 1852 Freshwater crustaceans of North America {{Crayfish-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Big Sandy Crayfish (16382866013)
The Big Sandy crayfish, ''Cambarus callainus'', are freshwater, tertiary burrowing crustaceans of the family Cambaridae. They are found in the streams and rivers of Appalachia in Virginia, West Virginia, and Kentucky, in what is known as the Big Sandy watershed. Populations are often mistaken with '' Cambarus veteranus'' (Guyandotte crayfish), but morphological and genetic data suggests that these are separate taxa; however, both are protected under the Endangered Species Act. There is very little information available on the Big Sandy crayfish because it is a relatively new species. Description The adult Big Sandy crayfish range from 3 to 4 inches in length. Overall in appearance, they have been referred to as "miniature lobsters" since they share similar characteristics. The colors of the Big Sandy crayfish shells range from olive brown to light green, and their cervical grooves are outlined in blue, aqua, or turquoise. They also have red and blue accents around their eyes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cambarus Aculabrum
''Cambarus aculabrum'' is a rare species of cave-dwelling crayfish known by the common name Benton county cave crayfish.''Cambarus aculabrum''. National Biological Information Infrastructure. It is native to in the United States, where it is known from only four locations. It is a federally listed of the United States.USFWS [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Procambarus
''Procambarus'' is a genus of crayfish in the family Cambaridae, all native to North and Central America. It includes a number of troglobitic species, and the marbled crayfish (''marmorkrebs''), which is parthenogenetic. Originally described as a subgenus for four species, it now contains around 161 species. Biogeography The majority of the diversity is found in the southeastern United States, but the genus extends as far south as Guatemala and Honduras, and on the Caribbean island of Cuba. After United States, the highest diversity is in Mexico with about 45 species. Only two are native to Guatemala (''P. pilosimanus'' and ''P. williamsoni''), one to Belize (''P. pilosimanus''), one to Honduras (''P. williamsoni'') and three to Cuba (''P. atkinsoni'', ''P. cubensis'' and ''P. niveus''). Subgenus ''Ortmannicus'' was the most widespread, with the range of ''Procambarus acutus'' extending as far north as the Great Lakes and New England, as well as south into northeastern Mexico; ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Adult
An adult is a human or other animal that has reached full growth. In human context, the term ''adult'' has meanings associated with social and legal concepts. In contrast to a " minor", a legal adult is a person who has attained the age of majority and is therefore regarded as independent, self-sufficient, and responsible. They may also be regarded as a "major". The typical age of attaining legal adulthood is 18, although definition may vary by legal rights, country, and psychological development. Human adulthood encompasses psychological adult development. Definitions of adulthood are often inconsistent and contradictory; a person may be biologically an adult, and have adult behavior, but still be treated as a child if they are under the legal age of majority. Conversely, one may legally be an adult but possess none of the maturity and responsibility that may define an adult character. In different cultures there are events that relate passing from being a child to becom ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Exoskeleton
An exoskeleton (from Greek ''éxō'' "outer" and ''skeletós'' "skeleton") is an external skeleton that supports and protects an animal's body, in contrast to an internal skeleton (endoskeleton) in for example, a human. In usage, some of the larger kinds of exoskeletons are known as " shells". Examples of exoskeletons within animals include the arthropod exoskeleton shared by chelicerates, myriapods, crustaceans, and insects, as well as the shell of certain sponges and the mollusc shell shared by snails, clams, tusk shells, chitons and nautilus. Some animals, such as the turtle, have both an endoskeleton and an exoskeleton. Role Exoskeletons contain rigid and resistant components that fulfill a set of functional roles in many animals including protection, excretion, sensing, support, feeding and acting as a barrier against desiccation in terrestrial organisms. Exoskeletons have a role in defense from pests and predators, support and in providing an attachment framewo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orconectes
''Orconectes'' is a genus of cave dwelling freshwater crayfish, endemic to suitable habitats in the eastern United States. Surface dwelling species, formerly categorised here, were moved to ''Faxonius'' in 2017. Due to their subterranean habitat, they are usually depigmented, often blind, and are long-lived. Ages of 176 years have been claimed for ''O. australis'', though this was reduced to ≤22 years in a 2012 study. Taxonomy The genus ''Orconectes'' was erected in 1872 by Edward Drinker Cope to house ''Astacus pellucidus'' (now '' Orconectes pellucidus'') and his new species, '' Orconectes inermis''. Prior to the 2017 review by Oxford university, the genus contained 85 species in 11 subgenera. The ''Faxonius ''Faxonius'' is a genus of crayfish, freshwater crayfish in the family Cambaridae. There are more than 90 described species in ''Faxonius''. It includes the rusty crayfish, an invasive species in North America, and three species, ''F. virilis'', ...'' subgenus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ecdysis
Ecdysis is the moulting of the cuticle in many invertebrates of the clade Ecdysozoa. Since the cuticle of these animals typically forms a largely inelastic exoskeleton, it is shed during growth and a new, larger covering is formed. The remnants of the old, empty exoskeleton are called exuviae. After moulting, an arthropod is described as ''teneral'', a ''callow''; it is "fresh", pale and soft-bodied. Within one or two hours, the cuticle hardens and darkens following a tanning process analogous to the production of leather. During this short phase the animal expands, since growth is otherwise constrained by the rigidity of the exoskeleton. Growth of the limbs and other parts normally covered by the hard exoskeleton is achieved by transfer of body fluids from soft parts before the new skin hardens. A spider with a small abdomen may be undernourished but more probably has recently undergone ecdysis. Some arthropods, especially large insects with tracheal respiration, expand the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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