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Gryllotalpa Major
''Gryllotalpa major'',also known as the prairie mole cricket, is endemic to the United States and is the largest cricket in North America. Its natural habitat is temperate grassland and it belongs to the family Gryllotalpidae. It is threatened by habitat loss, and is currently only found in Oklahoma, Kansas, Missouri, Nebraska and Arkansas. Males of this species produce sounds by rubbing their fore wings together. They sing from special burrows they construct in the prairie soil to attract females for mating, and they can be heard at distances up to 400 m from the burrow. Males aggregate their acoustic burrows in a lek arena and are very sensitive to vibrations carried through the ground. Males communicate with neighboring males through vibrational signals, and the songs they project to flying females are harmonic chirps, rather than the trills produced by most mole crickets. Physiology The species is the largest of the North American crickets, measuring up to 5 cm long ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States
The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territories, nine Minor Outlying Islands, and 326 Indian reservations. The United States is also in free association with three Pacific Island sovereign states: the Federated States of Micronesia, the Marshall Islands, and the Republic of Palau. It is the world's third-largest country by both land and total area. It shares land borders with Canada to its north and with Mexico to its south and has maritime borders with the Bahamas, Cuba, Russia, and other nations. With a population of over 333 million, it is the most populous country in the Americas and the third most populous in the world. The national capital of the United States is Washington, D.C. and its most populous city and principal financial center is New York City. Paleo-Americ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stolon
In biology, stolons (from Latin '' stolō'', genitive ''stolōnis'' – "branch"), also known as runners, are horizontal connections between organisms. They may be part of the organism, or of its skeleton; typically, animal stolons are external skeletons. In botany In botany, stolons are stems which grow at the soil surface or just below ground that form adventitious roots at the nodes, and new plants from the buds. Stolons are often called runners. Rhizomes, in contrast, are root-like stems that may either grow horizontally at the soil surface or in other orientations underground. Thus, not all horizontal stems are called stolons. Plants with stolons are called stoloniferous. A stolon is a plant propagation strategy and the complex of individuals formed by a mother plant and all its clones produced from stolons form a single genetic individual, a genet. Morphology Stolons may or may not have long internodes. The leaves along the stolon are usually very small, but in a few ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gryllotalpidae
Mole crickets are members of the insect family Gryllotalpidae, in the order Orthoptera (grasshoppers, locusts, and crickets). Mole crickets are cylindrical-bodied, fossorial insects about long as adults, with small eyes and shovel-like fore limbs highly developed for burrowing. They are present in many parts of the world and where they have arrived in new regions, may become agricultural pests. Mole crickets have three life stages: eggs, nymphs, and adults. Most of their lives in these stages are spent underground, but adults have wings and disperse in the breeding season. They vary in their diet: some species are herbivores, mainly feeding on roots; others are omnivores, including worms and grubs in their diet; and a few are largely predatory. Male mole crickets have an exceptionally loud song; they sing from a burrow that opens out into the air in the shape of an exponential horn. The song is an almost pure tone, modulated into chirps. It is used to attract females, eithe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Insects Of The United States
Insects (from Latin ') are pancrustacean hexapod invertebrates of the class Insecta. They are the largest group within the arthropod phylum. Insects have a chitinous exoskeleton, a three-part body ( head, thorax and abdomen), three pairs of jointed legs, compound eyes and one pair of antennae. Their blood is not totally contained in vessels; some circulates in an open cavity known as the haemocoel. Insects are the most diverse group of animals; they include more than a million described species and represent more than half of all known living organisms. The total number of extant species is estimated at between six and ten million; In: potentially over 90% of the animal life forms on Earth are insects. Insects may be found in nearly all environments, although only a small number of species reside in the oceans, which are dominated by another arthropod group, crustaceans, which recent research has indicated insects are nested within. Nearly all insects hatch from eg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NatureServe
NatureServe, Inc. is a non-profit organization based in Arlington County, Virginia, US, that provides proprietary wildlife conservation-related data, tools, and services to private and government clients, partner organizations, and the public. NatureServe reports being "headquartered in Arlington, Virginia, with regional offices in four U.S. locations and in Canada." In calendar year 2011 they reported having 86 employees, 6 volunteers, and 15 independent officers. History The Nature Conservancy reports that in 2000 it spun off its 85-center Natural Heritage Network "into a new independent organization, the Association for Biodiversity Information (later renamed NatureServe)." NatureServe reports that it was established in 1994 as the Association for Biodiversity Information. In 2001 the IRS approved a name change to NatureServe that was requested in 1999, while maintaining the organization's 501(c)(3) tax-exempt status granted in July 1995. NatureServe's website declares that it i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IUCN
The International Union for Conservation of Nature (IUCN; officially International Union for Conservation of Nature and Natural Resources) is an international organization working in the field of nature conservation and sustainable use of natural resources. It is involved in data gathering and analysis, research, field projects, advocacy, and education. IUCN's mission is to "influence, encourage and assist societies throughout the world to conserve nature and to ensure that any use of natural resources is equitable and ecologically sustainable". Over the past decades, IUCN has widened its focus beyond conservation ecology and now incorporates issues related to sustainable development in its projects. IUCN does not itself aim to mobilize the public in support of nature conservation. It tries to influence the actions of governments, business and other stakeholders by providing information and advice and through building partnerships. The organization is best known to the wider ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Threatened Species
Threatened species are any species (including animals, plants and fungi) which are vulnerable to endangerment in the near future. Species that are threatened are sometimes characterised by the population dynamics measure of ''critical depensation'', a mathematical measure of biomass related to population growth rate. This quantitative metric is one method of evaluating the degree of endangerment. IUCN definition The International Union for Conservation of Nature (IUCN) is the foremost authority on threatened species, and treats threatened species not as a single category, but as a group of three categories, depending on the degree to which they are threatened: *Vulnerable species *Endangered species * Critically endangered species Less-than-threatened categories are near threatened, least concern, and the no longer assigned category of conservation dependent. Species which have not been evaluated (NE), or do not have sufficient data ( data deficient) also are not considered ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subapical
A subapical consonant is a consonant made by contact with the underside of the tip of the tongue. The only common subapical articulations are in the postalveolar to palatal region, which are called "retroflex". Most so-called retroflex consonants are more properly called apical. True subapical retroflexes are found in the Dravidian languages of Southern India. Occasionally, the term "sublaminal" is used for "subapical", which might be better used for sounds pronounced between the underside of the tongue and the floor of the mouth, such as sucking-teeth and the slapped click The alveolar or postalveolar clicks are a family of click consonants found only in Africa and in the Damin ritual jargon of Australia. The tongue is more or less concave (depending on the language), and is pulled down rather than back as in ...s of Sandawe. References * Peter Ladefoged; Ian Maddieson. ''The Sounds of the World's Languages.'' Oxford: Blackwell 1996. . * Sanford B. Steever (ed.). ''The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gryllotalpa Inermis
''Gryllotalpa'' is a genus of insects in the mole cricket family Gryllotalpidae. Species The ''Orthoptera Species File'' lists a number species, including cryptic species groups (indicated with a * and often distinguished only by song patterns). They include: * species group* '' Gryllotalpa africana'' Palisot de Beauvois, 1805 — Africa * species group* '' Gryllotalpa australis'' Erichson, 1842 includes: ** ''Gryllotalpa brachyptera'' Tindale, 1928 — Australia * '' Gryllotalpa breviabdominis'' Ma & Zhang, 2011 * '' Gryllotalpa chiliensis'' Saussure, 1861 * '' Gryllotalpa chinensis'' Westwood, 1838 * '' Gryllotalpa choui'' Ma & Zhang, 2010 * '' Gryllotalpa cophta'' (Haan, 1844) * '' Gryllotalpa cultriger'' Uhler, 1864 — Mexico * ''Gryllotalpa cycloptera'' Ma & Zhang, 2011 * '' Gryllotalpa dentista'' Yang, 1995 * ''Gryllotalpa formosana'' Shiraki, 1930 — Taiwan * ''Gryllotalpa fraser'' Tan & Kamaruddin, 2013 * ''Gryllotalpa fulvipes'' Saussure, 1877 * ''Gryllotalpa fusc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gryllotalpa Pilosopes
''Gryllotalpa'' is a genus of insects in the mole cricket family Gryllotalpidae. Species The ''Orthoptera Species File'' lists a number species, including cryptic species groups (indicated with a * and often distinguished only by song patterns). They include: * species group* '' Gryllotalpa africana'' Palisot de Beauvois, 1805 — Africa * species group* '' Gryllotalpa australis'' Erichson, 1842 includes: ** ''Gryllotalpa brachyptera'' Tindale, 1928 — Australia * '' Gryllotalpa breviabdominis'' Ma & Zhang, 2011 * '' Gryllotalpa chiliensis'' Saussure, 1861 * '' Gryllotalpa chinensis'' Westwood, 1838 * '' Gryllotalpa choui'' Ma & Zhang, 2010 * '' Gryllotalpa cophta'' (Haan, 1844) * '' Gryllotalpa cultriger'' Uhler, 1864 — Mexico * ''Gryllotalpa cycloptera'' Ma & Zhang, 2011 * '' Gryllotalpa dentista'' Yang, 1995 * ''Gryllotalpa formosana'' Shiraki, 1930 — Taiwan * ''Gryllotalpa fraser'' Tan & Kamaruddin, 2013 * ''Gryllotalpa fulvipes'' Saussure, 1877 * ''Gryllotalpa fusc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gryllotalpa Devia
''Gryllotalpa'' is a genus of insects in the mole cricket family Gryllotalpidae. Species The ''Orthoptera Species File'' lists a number species, including cryptic species groups (indicated with a * and often distinguished only by song patterns). They include: * species group* ''Gryllotalpa africana'' Palisot de Beauvois, 1805 — Africa * species group* '' Gryllotalpa australis'' Erichson, 1842 includes: ** '' Gryllotalpa brachyptera'' Tindale, 1928 — Australia * '' Gryllotalpa breviabdominis'' Ma & Zhang, 2011 * '' Gryllotalpa chiliensis'' Saussure, 1861 * ''Gryllotalpa chinensis'' Westwood, 1838 * ''Gryllotalpa choui'' Ma & Zhang, 2010 * '' Gryllotalpa cophta'' (Haan, 1844) * '' Gryllotalpa cultriger'' Uhler, 1864 — Mexico * '' Gryllotalpa cycloptera'' Ma & Zhang, 2011 * '' Gryllotalpa dentista'' Yang, 1995 * '' Gryllotalpa formosana'' Shiraki, 1930 — Taiwan * '' Gryllotalpa fraser'' Tan & Kamaruddin, 2013 * '' Gryllotalpa fulvipes'' Saussure, 1877 * '' Gryllotalpa fusca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phylogenetic
In biology, phylogenetics (; from Greek φυλή/ φῦλον [] "tribe, clan, race", and wikt:γενετικός, γενετικός [] "origin, source, birth") is the study of the evolutionary history and relationships among or within groups of organisms. These relationships are determined by Computational phylogenetics, phylogenetic inference methods that focus on observed heritable traits, such as DNA sequences, protein amino acid sequences, or morphology. The result of such an analysis is a phylogenetic tree—a diagram containing a hypothesis of relationships that reflects the evolutionary history of a group of organisms. The tips of a phylogenetic tree can be living taxa or fossils, and represent the "end" or the present time in an evolutionary lineage. A phylogenetic diagram can be rooted or unrooted. A rooted tree diagram indicates the hypothetical common ancestor of the tree. An unrooted tree diagram (a network) makes no assumption about the ancestral line, and does ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
