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Parasyrphus Melanderi
''Parasyrphus melanderi'' is a flower fly (family Syrphidae) that is best known as a larval predator on the leaf beetle ''Chrysomela aeneicollis'' in the Sierra Nevada range of California. Description Adults are medium-sized flies (approximately 6-11mm). The dorsal side of the fourth abdominal segment (and usually the third segment) have an entire yellow band (rather than black), and the face has a black median stripe. In males, the ventral side of the abdomen (sternites) has few or no distinct markings, and in females, the sternites have spots or triangles and the facial stripe is no more than one-quarter the as wide as the face. Eggs of ''P. melanderi'' are white and are smaller than the eggs of their prey ''Chrysomela aeneicollis'' in California. Mature ''P. melanderi'' larvae are 14–16mm long and approximately 3mm in diameter. Larvae have pale markings with thin dark brown stripes anterior to them. Range The holotype of this species was collected by Doctor Melander on Mount ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Johan Wilhelm Zetterstedt
Johan Wilhelm Zetterstedt (20 May 1785 – 23 December 1874) was a Swedish naturalist who worked mainly on Diptera and Hymenoptera. Biography Zetterstedt studied at the University of Lund, where he was a pupil of Anders Jahan Retzius. He received the title of professor in 1822 and succeeded Carl Adolph Agardh as professor of botany and practical economy in 1836, retiring as emeritus in 1853. In 1831, he was elected a member of the Royal Swedish Academy of Sciences. He is best known as an entomologist. His collections of Scandinavian, Lapland and world Diptera and Orthoptera are in the Zoological Museum of the University of Lund. His students include Anders Gustaf Dahlbom. Selected works *1810-1812 ''Dissertatio de Fæcundatione Plantarum'' *1821 ''Orthoptera Sueciae disposita et descripta''. Lundae (Lund),132 pp. *1828 ''Fauna Insectorum Lapponica'' *1835 ''Monographia Scatophagarum Scandinaviæ'' *1837 Conspectus familiarum, generum et specierum Dipterorum, in Fauna insectoru ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chrysomela
''Chrysomela'' is a genus of leaf beetles found almost throughout the world, but not in Australia. It contains around 40 species, including 7 in eastern and northern Europe. It also includes at least 17 species in North America, including the cottonwood leaf beetle '' Chrysomela scripta''. Taxonomy ''Chrysomela'' is traditionally broken up into three subgenera, ''Chrysomela'', ''Macrolina'' (or ''Strickerus'') and ''Pachylina''. In 1998, researchers Maurizio Biondi and Mauro Daccordi proposed a new classification of ''Chryomela'' without any subgenera. This was followed by the sixth volume of the ''Catalogue of Palaearctic Coleoptera''. Species These 28 species belong to the genus ''Chrysomela'': * ''Chrysomela aeneicollis'' (Schaeffer, 1928) * ''Chrysomela collaris'' Linnaeus, 1758 ** ''Chrysomela collaris alpina'' Zetterstedt, 1838 ** ''Chrysomela collaris blaisdelli'' (Van Dyke, 1938) ** ''Chrysomela collaris collaris'' Linnaeus, 1758 ** ''Chrysomela collaris hyperborea'' Me ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chrysomela Aeneicollis
''Chrysomela aeneicollis'' is a species of leaf beetle in the family Chrysomelidae. This organism has been used as a model for studies of natural selection in nature. It is currently being investigated to study effects of environmental change on insect populations, and the evolutionary significance of variation at genes affecting metabolism and the response to stress. It has been included as a study species in the California Conservation Genomics Project, due to its presence in multiple California ecoregions and extensive knowledge of genetic variation, evolutionary ecology, and interactions with other species. Information about its range and comparisons with closely related species can be found in a review of the genus '' Chrysomela'' published in the Canadian Entomologist. Distribution ''Chrysomela aeneicollis'' is found in western North America. Populations occur in cooler habitats in coastal regions from northern California to British Columbia, or at high elevations in the Roc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parasyrphus Eggs
''Parasyrphus'' is a genus of hover fly found in the holarctic area of the world including species like '' Parasyrphus tarsatus'' located in some very northern areas. Very few of the 31 identified species have known larvae. Of the known larvae most are predators of tree aphids with one , ''Parasyrphus nigritarsis'', that feed on beetle eggs and larvae. Description For terminology se Thompson glossary of taxonomic termsbr> Species of this genus are small to medium sized , sturdy, usually with posteriorly rounded yellow spots or straight or posteriorly emarginate yellow bands on the oval abdomen, rarely with yellow abdominal markings reduced or absent. The abdomen is not marginate. The anterior anepisternum with short to moderately long erect hairs, at least posterodorsally. The hind coxa have tufts of hairs at the posteromedial apical angle. The eyes may be either bare or haired. The face usually has a promient tubercle. It is usually yellow or with distinct black median stripe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parasyrphus Nigritarsis
''Parasyrphus nigritarsis'' is a species of hoverfly, from the family Syrphidae, in the order Diptera. It is known from northern Europe and North America, and has been considered to be a rare species in parts of its range. Adults visit flowers as a source of nutrition, and females lay their eggs on clutches of eggs of leaf beetles (family Chrysomelidae). When the ''Parasyrphus'' larvae hatch, they first consume leaf beetle eggs and then consume immature beetles until they reach the pupal stage. This species is related to hoverflies that prey on aphids as larvae, and has been investigated in studies of chemical ecology and food web ecology. Distribution and habitat In Eurasia, ''P. nigritarsus'' occurs in the Nordic countries, south to Belgium, Germany, Switzerland and northern Spain, Ireland east through Central Europe into Russia and on to the Russian Far East and Japan. In North America, it occurs from Alaska to Quebec and south to Washington and Idaho. Thus, ''P. nigritarsus'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parasyrphus Larvae
''Parasyrphus'' is a genus of hover fly found in the holarctic area of the world including species like '' Parasyrphus tarsatus'' located in some very northern areas. Very few of the 31 identified species have known larvae. Of the known larvae most are predators of tree aphids with one , ''Parasyrphus nigritarsis'', that feed on beetle eggs and larvae. Description For terminology se Thompson glossary of taxonomic termsbr> Species of this genus are small to medium sized , sturdy, usually with posteriorly rounded yellow spots or straight or posteriorly emarginate yellow bands on the oval abdomen, rarely with yellow abdominal markings reduced or absent. The abdomen is not marginate. The anterior anepisternum with short to moderately long erect hairs, at least posterodorsally. The hind coxa have tufts of hairs at the posteromedial apical angle. The eyes may be either bare or haired. The face usually has a promient tubercle. It is usually yellow or with distinct black median stripe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parasyrphus Relictus
''Parasyrphus'' is a genus of hover fly found in the holarctic area of the world including species like '' Parasyrphus tarsatus'' located in some very northern areas. Very few of the 31 identified species have known larvae. Of the known larvae most are predators of tree aphids with one , ''Parasyrphus nigritarsis'', that feed on beetle eggs and larvae. Description For terminology se Thompson glossary of taxonomic termsbr> Species of this genus are small to medium sized , sturdy, usually with posteriorly rounded yellow spots or straight or posteriorly emarginate yellow bands on the oval abdomen, rarely with yellow abdominal markings reduced or absent. The abdomen is not marginate. The anterior anepisternum with short to moderately long erect hairs, at least posterodorsally. The hind coxa have tufts of hairs at the posteromedial apical angle. The eyes may be either bare or haired. The face usually has a promient tubercle. It is usually yellow or with distinct black median stripe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parasyrphus
''Parasyrphus'' is a genus of hover fly found in the holarctic area of the world including species like '' Parasyrphus tarsatus'' located in some very northern areas. Very few of the 31 identified species have known larvae. Of the known larvae most are predators of tree aphids with one , ''Parasyrphus nigritarsis'', that feed on beetle eggs and larvae. Description For terminology se Thompson glossary of taxonomic termsbr> Species of this genus are small to medium sized , sturdy, usually with posteriorly rounded yellow spots or straight or posteriorly emarginate yellow bands on the oval abdomen, rarely with yellow abdominal markings reduced or absent. The abdomen is not marginate. The anterior anepisternum with short to moderately long erect hairs, at least posterodorsally. The hind coxa have tufts of hairs at the posteromedial apical angle. The eyes may be either bare or haired. The face usually has a promient tubercle. It is usually yellow or with distinct black median stripe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
