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Chrysochus Cobaltinus
Chrysochus cobaltinus, the cobalt milkweed beetle or blue milkweed beetle, is a member of the diverse family of leaf beetles, Chrysomelidae. It is named after its cobalt-blue exoskeleton, which makes it easy to spot and distinguish, and its tendency to feed off Asclepias, milkweed plants. It occurs in the Western United States and British Columbia. These beetles use dogbane and Asclepias, milkweed plant species as their primary source of food. Both these plants contain toxic molecules known as cardenolides. ''C.cobaltinus'' beetles are resistant to cardenolide toxic effects and can further use them for their own protection against predators. By storing them in prothorax, pronotal and elytra glands, they can utilize these toxins to their advantage and evolutionary benefit. These beetles participate in Animal sexual behavior#Polygamy, polygamous matings in which both female and male beetles mate with multiple partners. Females can particularly mate with three male beetles simultane ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Lawrence LeConte
John Lawrence LeConte (May 13, 1825 – November 15, 1883) was an American entomologist of the 19th century, responsible for naming and describing approximately half of the insect taxa known in the United States during his lifetime,Bird Name Biographies - URL retrieved September 14, 2006 including some 5,000 of beetles. He was recognized as the foremost authority on North American s during his lifetime, and has been described as "the father of American beetle study".Evans, Arthur V., and James N. Hogue. 2004. Chapter 1: A Brief History of Beetle Study in California. ''I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Introgression
Introgression, also known as introgressive hybridization, in genetics is the transfer of genetic material from one species into the gene pool of another by the repeated backcrossing of an interspecific hybrid with one of its parent species. Introgression is a long-term process, even when artificial; it may take many hybrid generations before significant backcrossing occurs. This process is distinct from most forms of gene flow in that it occurs between two populations of different species, rather than two populations of the same species. Introgression also differs from simple hybridization. Simple hybridization results in a relatively even mixture; gene and allele frequencies in the first generation will be a uniform mix of two parental species, such as that observed in mules. Introgression, on the other hand, results in a complex, highly variable mixture of genes, and may only involve a minimal percentage of the donor genome. Definition Introgression or introgressive hybri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cardenolide
A cardenolide is a type of steroid. Many plants contain derivatives, collectively known as cardenolides, including many in the form of cardenolide glycosides (cardenolides that contain structural groups derived from sugars). Cardenolide glycosides are often toxic; specifically, they are heart-arresting. Cardenolides are toxic to animals through inhibition of the enzyme Na+/K+‐ATPase, which is responsible for maintaining the sodium and potassium ion gradients across the cell membranes. Etymology The term derives from ''card-'' "heart" (from Greek καρδία ''kardiā'') and the suffix ''-enolide'', referring to the lactone ring at C17. Cardenolides are a class of steroids (or aglycones if viewed as cardiac glycoside constituents), and cardenolides are a subtype of this class (see MeSH D codes list). Structure Cardenolides are C(23)-steroids with methyl groups at C-10 and C-13 and a five-membered lactone (specifically a butenolide) at C-17. They are aglycone constituents of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cobalt Milkweed Beetle (15196157483)
Chrysochus cobaltinus, the cobalt milkweed beetle or blue milkweed beetle, is a member of the diverse family of leaf beetles, Chrysomelidae. It is named after its cobalt-blue exoskeleton, which makes it easy to spot and distinguish, and its tendency to feed off milkweed plants. It occurs in the Western United States and British Columbia. These beetles use dogbane and milkweed plant species as their primary source of food. Both these plants contain toxic molecules known as cardenolides. ''C.cobaltinus'' beetles are resistant to cardenolide toxic effects and can further use them for their own protection against predators. By storing them in pronotal and elytra glands, they can utilize these toxins to their advantage and evolutionary benefit. These beetles participate in polygamous matings in which both female and male beetles mate with multiple partners. Females can particularly mate with three male beetles simultaneously. After the mating has occurred, males tend to stay mou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apocynum Androsaemifolium
''Apocynum androsaemifolium'', the fly-trap dogbane or spreading dogbane, is a flowering plant in the Gentianales order. It is common in North America. Description ''Apocynum androsaemifolium'' is a perennial herb with branching stems, hairs on the underside of the leaves, and no hair on the stems. It grows to , exceptionally . Milky sap appears on broken stems. Its leaves appear as pointed ovals, with entire leaf margins and alternate venation. Pairs of pink flowers bloom at the end of stalks between June and September. Two seed pods in length contain silky-haired seeds. Taxonomy Subspecies and varieties Subspecies and varieties include: # ''Apocynum androsaemifolium'' subsp. ''androsaemifolium'' - E Canada, W United States # ''Apocynum androsaemifolium'' var. ''griseum'' (Greene) Bég. & Belosersky - Ontario, British Columbia, Washington State, Oregon, Idaho, Indiana, Michigan # ''Apocynum androsaemifolium'' var. ''incanum'' A.DC. - widespread in Canada, United States ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apocynum Cannabinum
''Apocynum cannabinum'' (dogbane, amy root, hemp dogbane, prairie dogbane, Indian hemp, rheumatism root, or wild cotton) is a perennial herbaceous plant that grows throughout much of North America—in the southern half of Canada and throughout the United States. It is poisonous to humans, dogs, cats, and horses. All parts of the plant are toxic and can cause cardiac arrest if ingested. Some Lepidoptera feed on this plant, such as a hummingbird moth. Description ''Apocynum cannabinum'' grows up to tall. The stems are reddish and contain a milky latex. The leaves are opposite, simple broad lanceolate, long and broad, entire, and smooth on top with white hairs on the underside. It flowers from July to August, has large sepals, and a five-lobed white corolla. The flowers are hermaphrodite, with both male and female organs. Taxonomy Etymology ''Apocynum'' means "poisonous to dogs". The specific epithet ''cannabinum'', and the common names hemp dogbane and Indian hemp refer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chrysochus
''Chrysochus'' is a genus of leaf beetles in the subfamily Eumolpinae. It is known from North America, Europe and Asia. Etymology The name of the genus is derived from the Greek language, Greek word (), meaning "goldsmith". Taxonomic history In 1836, the genus ''Chrysochus'' was first established by Louis Alexandre Auguste Chevrolat in Pierre François Marie Auguste Dejean, Dejean's ''Catalogue des Coléoptères'', including the species ''Chrysomela asiatica'' Pallas, 1771, ''C. aurata'' Fabricius, 1775 and ''C. pretiosa'' Fabricius, 1792 (now ''Chrysochares asiaticus'', ''Chrysochus auratus'' and ''Chrysochus asclepiadeus'', respectively). ''Chrysomela praetiosa'' was designated as the type species of the genus by Sylvain Auguste de Marseul in 1864. The generic name ''Chrysochus'' Chevrolat in Dejean, 1836 is a conserved name. It was threatened by ''Eumolpus (beetle), Eumolpus'' in the sense used by Johann Gottlieb Kugelann, Kugelann in Johann Karl Wilhelm Illiger, Illiger, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
