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Scaeva Affinis
''Scaeva affinis'', commonly known as the white-bowed smoothwing, is a species of hoverfly found in western North America. The larval form feeds voraciously on aphids. ''Scaeva affinis'' is the only ''Scaeva'' likely to be encountered in the Nearctic realm, where it is common in the west and rare in the east. This species is believed to be migratory.' In 1823, Thomas Say originally described it as "tergum black with three yellow wikt:lunule, lunules on each side...inhabits Arkansa." ''S. affinis'' was later combined with (and then determined to be a distinct species and was split back off from) ''Scaeva pyrastri''. References Syrphini Insects described in 1823 Taxa named by Thomas Say Hoverflies of North America {{Syrphidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thomas Say
Thomas Say (June 27, 1787 – October 10, 1834) was an American entomologist, conchologist, and herpetologist. His studies of insects and shells, numerous contributions to scientific journals, and scientific expeditions to Florida, Georgia, the Rocky Mountains, Mexico, and elsewhere made him an internationally known naturalist. Say has been called the father of American descriptive entomology and American conchology. He served as librarian for the Academy of Natural Sciences of Philadelphia, curator at the American Philosophical Society (elected in 1817), and professor of natural history at the University of Pennsylvania. Early life and education Born in Philadelphia into a prominent Quaker family, Thomas Say was the great-grandson of John Bartram, and the great-nephew of William Bartram. His father, Dr. Benjamin Say, was brother-in-law to another Bartram son, Moses Bartram. The Say family had a house, "The Cliffs" at Gray's Ferry, adjoining the Bartram family farms in King ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
In biology, a species is the basic unit of Taxonomy (biology), classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can reproduction, produce Fertility, fertile offspring, typically by sexual reproduction. Other ways of defining species include their karyotype, DNA sequence, morphology (biology), morphology, behaviour or ecological niche. In addition, paleontologists use the concept of the chronospecies since fossil reproduction cannot be examined. The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million. However, only about 14% of these had been described by 2011. All species (except viruses) are given a binomial nomenclature, two-part name, a "binomial". The first part of a binomial is the genus to which the species belongs. The second part is called the specifi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hoverfly
Hover flies, also called flower flies or syrphid flies, make up the insect family Syrphidae. As their common name suggests, they are often seen hovering or nectaring at flowers; the adults of many species feed mainly on nectar and pollen, while the larvae (maggots) eat a wide range of foods. In some species, the larvae are saprotrophs, eating decaying plant and animal matter in the soil or in ponds and streams. In other species, the larvae are insectivores and prey on aphids, thrips, and other plant-sucking insects. Insects such as aphids are considered a crop pest, and therefore the aphid-eating larvae of some hover flies serve as an economically (as well as ecologically) important predator and even potential agents for use in biological control, while the adults may be pollinators. About 6,000 species in 200 genera have been described. Hover flies are common throughout the world and can be found on all continents except Antarctica. Hover flies are harmless to most mammals, th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scaeva
''Scaeva'' is a genus of hoverflies. The taxonomy of the genus, and the related genera '' Simosyrphus'' and ''Ischiodon'' has been discussed by Láska et al. (2006) Species * ''Scaeva affinis'' (Say, 1823) * ''Scaeva albomaculata'' ( Macquart, 1842) *''Scaeva dignota'' ( Rondani, 1857) *''Scaeva latimaculata'' ( Brunetti, 1923) *''Scaeva mecogramma'' (Bigot, 1860) *''Scaeva pyrastri'' (Linnaeus, 1758) *''Scaeva selenitica ''Scaeva selenitica'' is a species of hoverfly. Description ''Scaeva selenitica'' can reach a length of , with a wing length of . These large distinctive hoverflies have sparse, fine light hair. Thorax is shiny black, scutellum is yellowish-gree ...'' ( Meigen, 1822) References External links * {{Taxonbar, from=Q2557850 Diptera of Europe Diptera of North America Syrphinae Syrphini Hoverfly genera Taxa named by Johan Christian Fabricius ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nearctic Realm
The Nearctic realm is one of the eight biogeographic realms constituting the Earth's land surface. The Nearctic realm covers most of North America, including Greenland, Central Florida, and the highlands of Mexico. The parts of North America that are not in the Nearctic realm are Eastern Mexico, Southern Florida, coastal Central Florida, Central America, and the Caribbean islands, which, together with South America, are part of the Neotropical realm. Major ecological regions The World Wildlife Fund (WWF) divides the Nearctic into four bioregions, defined as "geographic clusters of ecoregions that may span several habitat types, but have strong biogeographic affinities, particularly at taxonomic levels higher than the species level (genus, family)." Canadian Shield The Canadian Shield bioregion extends across the northern portion of the continent, from the Aleutian Islands to Newfoundland and Labrador, Newfoundland. It includes the Nearctic's Arctic Tundra and Boreal forest e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tergum
A ''tergum'' (Latin for "the back"; plural ''terga'', associated adjective tergal) is the dorsal ('upper') portion of an arthropod segment other than the head. The anterior edge is called the 'base' and posterior edge is called the 'apex' or 'margin'. A given tergum may be divided into hardened plates or sclerites commonly referred to as tergites. In a thoracic segment, for example, the tergum may be divided into an anterior notum and a posterior scutellum. Lateral extensions of a tergite are known as paranota (Greek for "alongside the back") or ''carinae'' (Latin for "keel"), exemplified by the flat-backed millipedes of the order Polydesmida. Kinorhynchs have tergal and sternal plates too, though seemingly not homologous with those of arthropods. Tergo-tergal is a stridulatory mechanism in which fine spines of the abdominal tergites are rubbed together to produce sound. This process is known as abdominal telescoping. Examples File:Andrena spiraeana abdomen.jpg , Abdom ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lunule
The word lunula means ''little moon'' and may also refer to: * Lunula (amulet), a Roman amulet worn by girls, the equivalent of the bulla worn by boys * Lunula (anatomy), the pale half-moon shape at the base of a fingernail * Lunule (bivalve), a crescent-moon shaped area on the shells of some marine bivalves * Two round brackets and the text between them * Gold lunula, a specific kind of archaeological solid collar or necklace from the Bronze Age or later * The openings in the test of a sand dollar * ''Calophasia lunula'', a species of moth * ''Chaetodon lunula'', a species of butterflyfish See also * Lunette (other) * Lune (other) {{disambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scaeva Pyrastri
''Scaeva pyrastri'', common name the pied hoverfly, is a species of hoverfly. Distribution These hoverflies are present in most of Europe, the Near East, the East Palearctic realm, the Nearctic realm, North Africa, and the Indomalayan realm. In the UK ''S. pyrastri'' is a migrant which arrives in some years in high numbers and in others is almost absent. Description ''Scaeva pyrastri'' can reach a length of . This large distinctive fly has three pairs of white comma markings ( lunules) on the abdomen, these are yellow on '' Scaeva selenitica''. The face is yellow, with reddish brown antennae. The eyes are covered with hair. Scutellum is brown yellow. The legs are red with a black base of the femur. The male's eyes do touch in the centre of the frons, while in the females they are separated. The larvae are light green or sometimes pink, with a white dorsal longitudinal stripe. Habitat and behavior This species can be found in gardens, meadows and wasteland. Adults are com ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Syrphini
The Syrphini are a tribe of hoverflies. List of genera Relationships within this tribe were investigated by analysing and comparing genetic data. Results seem to show the members of Syrphini fall into several smaller groups or clades. *'' Afrosyrphus'' Curran, 1927 *'' Agnisyrphus'' Ghorpade, 1994 *''Allobacha'' Curran, 1928 *''Allograpta'' Osten Sacken, 1875. Subgenera: ''A. (Allograpta)'', ''A. (Antillus)'', ''A. (Claraplumula)'', ''A. (Costarica)'', ''A. (Fazia)'', ''A. (Rhinoprosopa)'' *''Anu'' Thompson, 2008 *'' Asarkina'' Macquart, 1834. Subgenera: ''A. (Achoanus)'', ''A. (Asarkina)'' *'' Asiodidea'' Stackelberg, 1930 *'' Betasyrphus'' Matsumura, 1917 *''Chrysotoxum'' Meigen, 1803 *'' Citrogramma'' Vockeroth, 1969 *''Dasysyrphus'' Enderlein, 1938 *'' Didea'' Macquart, 1834 *'' Dideomima'' Vockeroth, 1969 *'' Dideoides'' Brunetti, 1908 *'' Dideopsis'' Matsumura, 1917 *'' Doros'' Meigen, 1803 *'' Eosphaerophoria'' Frey, 1946 *'' Epistrophe'' Walker, 1852 *''Epist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Insects Described In 1823
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 eggs. Inse ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxa Named By Thomas Say
In biology, a taxon (back-formation from ''taxonomy''; plural taxa) is a group of one or more populations of an organism or organisms seen by taxonomists to form a unit. Although neither is required, a taxon is usually known by a particular name and given a particular ranking, especially if and when it is accepted or becomes established. It is very common, however, for taxonomists to remain at odds over what belongs to a taxon and the criteria used for inclusion. If a taxon is given a formal scientific name, its use is then governed by one of the nomenclature codes specifying which scientific name is correct for a particular grouping. Initial attempts at classifying and ordering organisms (plants and animals) were set forth in Carl Linnaeus's system in ''Systema Naturae'', 10th edition (1758), as well as an unpublished work by Bernard and Antoine Laurent de Jussieu. The idea of a unit-based system of biological classification was first made widely available in 1805 in the int ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
