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Genus | A Wisdom Archive on Genus | | Genus A selection of articles related to Genus | |
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genus, Genus, Linnaean taxonomy, Cladistics
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| ARTICLES RELATED TO Genus | | | |  Genus: Encyclopedia II - Helix genus - External featuresIn addition to the hard calcareous shell that covers and protects the internal organs, the head and foot region can be observed when the snails are fully extended. When they are active, the organs such as the lung, heart, kidney and intestines remain inside the shell, only the head and foot emerge.
The head of the snail has two pairs of tentacles, the upper and larger pair contain the eyes, the lower pair are used to feel the ground in front. The mouth is located just underneath the head. The tentacles can be withdrawn or extended dep ...
See also:Helix genus, Helix genus - Where snails are naturally found, Helix genus - What snails eat and who eats snails, Helix genus - External features, Helix genus - Mating, Helix genus - Growth and death, Helix genus - Respiration, Helix genus - Taxonomy, Helix genus - External link Read more here: » Helix genus: Encyclopedia II - Helix genus - External features |
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| | | | | Genus: Encyclopedia II - Helix genus - Growth and death After snails are hatched from the egg, they mature through one or more years. It depends on where the organism lives. Maturity takes two years in Southern California, while it takes only ten months in South Africa.
The size of the adult snails slightly varies with species. H. aspersa grows up to 35 mm in height and width, whereas H. pomatia grows up to 45 mm. The life span of the snails in the wild is on average two or three years.
Some snails may live longer, perhaps even 30 years or older in the case of the Roman snail [1] but most live less than 8 years. ...
See also:Helix genus, Helix genus - Where snails are naturally found, Helix genus - What snails eat and who eats snails, Helix genus - External features, Helix genus - Mating, Helix genus - Growth and death, Helix genus - Respiration, Helix genus - Taxonomy, Helix genus - External link Read more here: » Helix genus: Encyclopedia II - Helix genus - Growth and death |
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| | | | | Genus: Encyclopedia II - Helix genus - What snails eat and who eats snails The common garden snail (Helix aspersa) is herbivorous. They are able to digest most vegetation such as carrots and lettuce. They also have a specialized crop of symbiotic bacteria in their intestine which is used to digest cellulose.
There are many predators that prey upon snails. Some animals such as the song thrush break the shell of the snail by hammering it against a stone to get at its soft insides, some, like frogs, even eat the whole snail, shell and all. There are even s ...
See also:Helix genus, Helix genus - Where snails are naturally found, Helix genus - What snails eat and who eats snails, Helix genus - External features, Helix genus - Mating, Helix genus - Growth and death, Helix genus - Respiration, Helix genus - Taxonomy, Helix genus - External link Read more here: » Helix genus: Encyclopedia II - Helix genus - What snails eat and who eats snails |
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| | | | | Genus: Encyclopedia II - Pachypodium - History of the genus The early history of the genus Pachypodium demonstrates the typical process of a taxon becoming a new genus. Initially debate occurred over if Pachypodium belonged to the genus Echites or if it constituted a separate genus. Pachypodium were first published as a unique genus, separate from Echites, by Leandley in 1830.
In 1907, Costantin and Bois constructed the first monograph, of Pach ...
See also:Pachypodium, Pachypodium - Genus characteristics, Pachypodium - Morphology, Pachypodium - Adaptive Features, Pachypodium - Taxonomy, Pachypodium - Number of species, Pachypodium - Affinities within the Apocynaceae, Pachypodium - Distribution and habitats, Pachypodium - Distribution, Pachypodium - Habitat, Pachypodium - Protection status, Pachypodium - History of the genus, Pachypodium - Natural history Read more here: » Pachypodium: Encyclopedia II - Pachypodium - History of the genus |
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| | | | | Genus: Encyclopedia II - Pachypodium - Genus characteristics All Pachypodium are succulent plants that exhibit, to varying degrees, the morphological characteristics of pachycaule trunks and spinescence. These are the most general features of the genus and can be considered distinguishing characteristics.
The pachycaule trunk is a morphologically enlarged trunk that stores water so as to survive seasonal drought or intemitent periods of root dessication in exposed, dry, and rocky conditions. Whereas there is great variation in the habit of the plant body, all Pachypodium exhibit pachycaul growth. Variation in habit can range from dwarf flattened pla ...
See also:Pachypodium, Pachypodium - Genus characteristics, Pachypodium - Morphology, Pachypodium - Adaptive Features, Pachypodium - Taxonomy, Pachypodium - Number of species, Pachypodium - Affinities within the Apocynaceae, Pachypodium - Distribution and habitats, Pachypodium - Distribution, Pachypodium - Habitat, Pachypodium - Protection status, Pachypodium - History of the genus, Pachypodium - Natural history Read more here: » Pachypodium: Encyclopedia II - Pachypodium - Genus characteristics |
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| | | | | | Genus: Encyclopedia II - Cod - Species in genus Gadus At various times in the past, a very considerable number of species have been classified in this genus. However the great majority of them are now either classifed in other genera, or have been recognised as simply forms of one of three species. Modern taxonomy, therefore, recognises only three species in this genus:
Atlantic cod Gadus morhua
Pacific cod Gadus macrocephalus
Greenland cod Gadus ogac
All these species have a profusion of common names, most of them including the word "cod". Many common names have been used of more than on ...
See also:Cod, Cod - Species in genus Gadus, Cod - Related species called cod, Cod - Unrelated species called cod, Cod - Order Perciformes:, Cod - Order Scorpaeniformes, Cod - Order Ophidiiformes:, Cod - Species marketed as cod, Cod - Cod trade Read more here: » Cod: Encyclopedia II - Cod - Species in genus Gadus |
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| | | | | | Genus: Encyclopedia II - Danionin - Species, Listed in order of Scientific Name, categorised by Genus
The species remaining in the Danio genus comprise most of the Danionins familiar to aquarists. They have two pairs of long barbels and are generally characterised by horizontal stripes (with the exception of the Glowlight Danio and Black Barred Danio which have vertical bars. In size they range from 4 cm/ 1.75 in) to 15 cm/ 6 in).
Danio albolineatus - Pearl Danio -(6 cm/ 2.5 in)
Danio abolineatus var pulcher - Blue-Redstripe Danio - (5 cm/ 2 in)
Danio abolineatus var < ...
See also:Danionin, Danionin - Species, listed in order of common name, Danionin - Species, Listed in order of Scientific Name, categorised by Genus, Danionin - Danionins renamed or wrongly identified Read more here: » Danionin: Encyclopedia II - Danionin - Species, Listed in order of Scientific Name, categorised by Genus |
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| | | | | Genus: Encyclopedia II - List of Quercus species - Genus Quercus
List of Quercus species - Section Quercus.
The white oaks (synonym sect. Lepidobalanus). Europe, Asia, north Africa, North America. Styles short; acorns mature in 6 months, sweet or slightly bitter, inside of acorn shell hairless.
Quercus alba - White oak - eastern North America
Quercus aliena - Oriental white oak - eastern Asia
Quercus arizonica - Arizona white oak # - southwestern North America
Quercus austrina - Bluff oak- ...
See also:List of Quercus species, List of Quercus species - Genus Quercus, List of Quercus species - Section Quercus, List of Quercus species - Section Mesobalanus, List of Quercus species - Section Cerris, List of Quercus species - Section Protobalanus, List of Quercus species - Section Lobatae, List of Quercus species - Notes Read more here: » List of Quercus species: Encyclopedia II - List of Quercus species - Genus Quercus |
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| | | | | Genus: Encyclopedia II - Honeybee - Origin and distribution of the genus Apis Honeybees probably originated in Tropical Africa and spread from South Africa to Northern Europe and East into India and China. The first bees appear in the fossil record in deposits dating about 40 million years ago during the Eocene period. At about 30 million years before present they appear to have developed social behavior and structurally are virtually identical with modern bees.
Apis mellifera, the most commonly domesticated species, is native to Europe, Asia and Africa. It is also called the Western honeybee. There are ...
See also:Honeybee, Honeybee - Other honey collecting insects, Honeybee - Origin and distribution of the genus Apis, Honeybee - Beekeeping, Honeybee - Honeybee life cycle, Honeybee - Products of the honeybee, Honeybee - Pollination, Honeybee - Honey, Honeybee - Beeswax, Honeybee - Pollen, Honeybee - Propolis, Honeybee - Hazards to honeybee survival, Honeybee - Honeybee predators, Honeybee - Insects, Honeybee - Reptiles and Amphibians, Honeybee - Birds, Honeybee - Mammals, Honeybee - Honeybee Communication, Honeybee - Sources, Honeybee - Trivia, Honeybee - Designated state insect Read more here: » Honeybee: Encyclopedia II - Honeybee - Origin and distribution of the genus Apis |
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| | | | | Genus: Encyclopedia II - Human evolution - The Homo genus In modern taxonomy, Homo sapiens is the only extant species of its genus, Homo. Likewise, the ongoing study of the origins of Homo sapiens often demonstrates that there were other Homo species, all of which are now extinct. While some of these other species might have been ancestors of H. sapiens, many were likely our 'cousins', having speciated away from our ancestral line. There is not yet a consensus as to which of these groups should count as separate species and which as subspecies of another species. ...
See also:Human evolution, Human evolution - History of paleoanthropology, Human evolution - Before Homo, Human evolution - The Homo genus, Human evolution - Homo habilis, Human evolution - Homo erectus, Human evolution - Homo ergaster, Human evolution - Homo heidelbergensis, Human evolution - Homo sapiens idaltu, Human evolution - Homo floresiensis, Human evolution - Homo neanderthalensis, Human evolution - Homo sapiens, Human evolution - Notable human evolution researchers, Human evolution - Additional notes Read more here: » Human evolution: Encyclopedia II - Human evolution - The Homo genus |
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| | | | | Genus: Encyclopedia II - Human evolution - The Homo genus In modern taxonomy, Homo sapiens is the only extant species of its genus, Homo. Likewise, the ongoing study of the origins of Homo sapiens often demonstrates that there were other Homo species, all of which are now extinct. While some of these other species might have been ancestors of H. sapiens, many were likely our 'cousins', having speciated away from our ancestral line. There is not yet a consensus as to which of these groups should count as separate species and which as subspecies of another species. ...
See also:Human evolution, Human evolution - History of paleoanthropology, Human evolution - Before Homo, Human evolution - The Homo genus, Human evolution - Homo habilis, Human evolution - Homo erectus, Human evolution - Homo ergaster, Human evolution - Homo heidelbergensis, Human evolution - Homo sapiens idaltu, Human evolution - Homo floresiensis, Human evolution - Homo neanderthalensis, Human evolution - Homo sapiens, Human evolution - Additional notes Read more here: » Human evolution: Encyclopedia II - Human evolution - The Homo genus |
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| | | | | | Genus: Encyclopedia II - Echidna - Description Echidnas are small mammals that are covered with coarse hair and spines, superficially they resemble both the anteaters of South America and other spiny mammals like hedgehogs and porcupines. They have snouts which have the functions of both the mouth and nose, their snouts are elongated and slender. They have very short, strong limbs with large claws and are powerful diggers. Echidnas have a tiny mouth and a toothless jaw. They feed by tearing open soft logs, anthills and the like, and using their long, sticky tongue which protrudes from th ...
See also:Echidna, Echidna - Taxomony, Echidna - Zaglossus genus, Echidna - Tachyglossus genus, Echidna - Description, Echidna - Conservation status, Echidna - Trivia, Echidna - Reference Read more here: » Echidna: Encyclopedia II - Echidna - Description |
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| | | | | | | Genus: Encyclopedia II - Pachypodium - Protection status Internationally Pachypodium are protected under the CITES treaty. According to it, members of this genus cannot be collected from endemic, native locations within the landscape. They are not easily, readily imported and exported between nations either. The protection afforded by the CITES treaty responses to two issues:
The esteem the genus has within Collector's and Nursery Trade. As highly esteemed plants, succulent enthusiast desire to collect more and more species and cultivars. In the case of Pachypodium, seed ...
See also:Pachypodium, Pachypodium - Genus characteristics, Pachypodium - Morphology, Pachypodium - Adaptive Features, Pachypodium - Taxonomy, Pachypodium - Number of species, Pachypodium - Affinities within the Apocynaceae, Pachypodium - Distribution and habitats, Pachypodium - Distribution, Pachypodium - Habitat, Pachypodium - Protection status, Pachypodium - History of the genus, Pachypodium - Natural history Read more here: » Pachypodium: Encyclopedia II - Pachypodium - Protection status |
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| | | | | | | Genus: Encyclopedia II - Pachypodium - Taxonomy
Pachypodium - Number of species.
There are now 25 known species, of which 20 come from Madagascar, where isolated landscapes and micro-environmental conditions have produced highly specialized species. The species account continues to grow as Pachypodium menabeum has been resurrected from invalid taxonomy and Pachypodium makayense added newly to the list. One can speculate that in regions such as Madagascar, there might still be unidentified species that are confined to a single rocky outcrop or an ...
See also:Pachypodium, Pachypodium - Genus characteristics, Pachypodium - Morphology, Pachypodium - Adaptive Features, Pachypodium - Taxonomy, Pachypodium - Number of species, Pachypodium - Affinities within the Apocynaceae, Pachypodium - Distribution and habitats, Pachypodium - Distribution, Pachypodium - Habitat, Pachypodium - Protection status, Pachypodium - History of the genus, Pachypodium - Natural history Read more here: » Pachypodium: Encyclopedia II - Pachypodium - Taxonomy |
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| | | | | Genus: Encyclopedia II - Pachypodium - Distribution and habitats
Pachypodium - Distribution.
Pachypodium are endemic to Madagascar and continental Southern Africa, i.e. Angola, Botswana, Mozambique, Namibia, South Africa, Swaziland and Zimbabwe.
Pachypodium - Habitat.
See main articles Pachypodium habitats, Habitats of Pachypodium of Southern Continental Africa and Madagascar and Larger context to habitats of Pachypodium. Those 3 articles are to be merged into one, ...
See also:Pachypodium, Pachypodium - Genus characteristics, Pachypodium - Morphology, Pachypodium - Adaptive Features, Pachypodium - Taxonomy, Pachypodium - Number of species, Pachypodium - Affinities within the Apocynaceae, Pachypodium - Distribution and habitats, Pachypodium - Distribution, Pachypodium - Habitat, Pachypodium - Protection status, Pachypodium - History of the genus, Pachypodium - Natural history Read more here: » Pachypodium: Encyclopedia II - Pachypodium - Distribution and habitats |
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