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Herpsilochmus Gentryi
The ancient antwren (''Herpsilochmus gentryi'') is a species of tropical bird in the family Thamnophilidae. It is primarily found in ''terra firme'' forests of northern Peru and southeastern Ecuador. This species was described in 1998 and named after the American botanist Alwyn Gentry. Habitat loss poses the greatest threat to this species. Taxonomy and systematics The ancient antwren was described in 1998 by Bret M. Whitney and Jose Alvarez Alonso. The holotype was collected along the Rio Tigre in the Department of Loreto, Peru. The specific epithet, ''gentryi'', refers to the American botanist Alwyn Gentry. It is closely related to the Todd's Antwren, to which it may be a sister species. This species is monotypic, with no known subspecies. Description The ancient antwren is small passerine, with a total length of 10-11 centimeters (4 in) and weight of 10.2-11 grams. Sexual dimorphism is present in this species, but not as apparent when compared to other members of this ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thamnophilidae
The antbirds are a large passerine bird family, Thamnophilidae, found across subtropical and tropical Central and South America, from Mexico to Argentina. There are more than 230 species, known variously as antshrikes, antwrens, antvireos, fire-eyes, bare-eyes and bushbirds. They are related to the antthrushes and antpittas (family Formicariidae), the tapaculos, the gnateaters and the ovenbirds. Despite some species' common names, this family is not closely related to the wrens, vireos or shrikes. Antbirds are generally small birds with rounded wings and strong legs. They have mostly sombre grey, white, brown and rufous plumage, which is sexually dimorphic in pattern and colouring. Some species communicate warnings to rivals by exposing white feather patches on their backs or shoulders. Most have heavy bills, which in many species are hooked at the tip. Most species live in forests, although a few are found in other habitats. Insects and other arthropods from the most impor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alwyn Gentry
Alwyn Howard Gentry (January 6, 1945 – August 3, 1993) was an American botanist and plant collector, who made major contributions to the understanding of the vegetation of tropical forests. Education Gentry was born on January 6, 1945, in Clay Center, Kansas, and received his schooling at the List of high schools in Kansas#Clay County, Clay Center Community High School, from which he graduated in 1963. He graduated from Kansas State University in 1967 with a B.A. in physical science and a B.S. in botany and zoology. He earned his master's degree in 1969 at the University of Wisconsin–Madison as a student of botanist Hugh Iltis, with a thesis on the genus ''Tabebuia'' (Bignoniaceae) of Central America, a subject which he continued to study at Washington University in St. Louis, Missouri, from which he received his doctorate in 1972, with a Ph.D. thesis entitled ''An Eco-evolutionary Study of the Bignoniaceae of South Central America''. Career Gentry spent his entire working ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Holotype
A holotype is a single physical example (or illustration) of an organism, known to have been used when the species (or lower-ranked taxon) was formally described. It is either the single such physical example (or illustration) or one of several examples, but explicitly designated as the holotype. Under the International Code of Zoological Nomenclature (ICZN), a holotype is one of several kinds of name-bearing types. In the International Code of Nomenclature for algae, fungi, and plants (ICN) and ICZN, the definitions of types are similar in intent but not identical in terminology or underlying concept. For example, the holotype for the butterfly '' Plebejus idas longinus'' is a preserved specimen of that subspecies, held by the Museum of Comparative Zoology at Harvard University. In botany, an isotype is a duplicate of the holotype, where holotype and isotypes are often pieces from the same individual plant or samples from the same gathering. A holotype is not necessarily "typ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Todd's Antwren
Todd's antwren (''Herpsilochmus stictocephalus'') is a species of bird in the family Thamnophilidae. It is found in the Guiana Shield (eastern Venezuela to Amapá). Its natural habitat is subtropical or tropical moist lowland forest A forest is an area of land dominated by trees. Hundreds of definitions of forest are used throughout the world, incorporating factors such as tree density, tree height, land use, legal standing, and ecological function. The United Nations' ...s. References Todd's antwren Birds of the Guianas Todd's antwren Todd's antwren Taxonomy articles created by Polbot {{Thamnophilidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sexual Dimorphism
Sexual dimorphism is the condition where the sexes of the same animal and/or plant species exhibit different morphological characteristics, particularly characteristics not directly involved in reproduction. The condition occurs in most animals and some plants. Differences may include secondary sex characteristics, size, weight, colour, markings, or behavioural or cognitive traits. These differences may be subtle or exaggerated and may be subjected to sexual selection and natural selection. The opposite of dimorphism is ''monomorphism'', which is when both biological sexes are phenotypically indistinguishable from each other. Overview Ornamentation and coloration Common and easily identified types of dimorphism consist of ornamentation and coloration, though not always apparent. A difference in coloration of sexes within a given species is called sexual dichromatism, which is commonly seen in many species of birds and reptiles. Sexual selection leads to the exaggerated dim ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Herpsilochmus
''Herpsilochmus'' is a genus of insectivorous passerine birds in the antbird family (Thamnophilidae). They are found in forest, woodland and shrub in South America, although a single species the rufous-winged antwren (''H. rufimarginatus'') also occurs in Panama. All are relatively small antbirds that are sexually dichromatic. In most (but not all) species males are essentially light grey with a black crown and black-and-white wings, while females are more buff or rufous with black-and-white crown. The genus ''Herpsilochmus'' was introduced by the German ornithologist Jean Cabanis in 1847. The name of genus combines the Ancient Greek words ''herpō'' "to creep about" and ''lokhmē'' "thicket" or "copse". The type species is the Bahia antwren. The genus contains 18 species: * Ash-throated antwren, ''Herpsilochmus parkeri'' * Creamy-bellied antwren, ''Herpsilochmus motacilloides'' * Predicted antwren, ''Herpsilochmus praedictus'' * Aripuana antwren, ''Herpsilochmus stotzi'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sympatry
In biology, two related species or populations are considered sympatric when they exist in the same geographic area and thus frequently encounter one another. An initially interbreeding population that splits into two or more distinct species sharing a common range exemplifies sympatric speciation. Such speciation may be a product of reproductive isolation – which prevents hybrid offspring from being viable or able to reproduce, thereby reducing gene flow – that results in genetic divergence. Sympatric speciation may, but need not, arise through secondary contact, which refers to speciation or divergence in allopatry followed by range expansions leading to an area of sympatry. Sympatric species or taxa in secondary contact may or may not interbreed. Types of populations Four main types of population pairs exist in nature. Sympatric populations (or species) contrast with parapatric populations, which contact one another in adjacent but not shared ranges and do not ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dugand's Antwren
Dugand's antwren (''Herpsilochmus dugandi'') is a species of bird in the family Thamnophilidae. It is found in Colombia, Ecuador, and Peru. Its natural habitat is subtropical or tropical moist lowland forests. The bird is named in commemoration of Colombian naturalist Armando Dugand Armando Dugand (July 23, 1906 – 1971) was a Colombian botanist, geobotanist Phytogeography (from Greek φυτόν, ''phytón'' = "plant" and γεωγραφία, ''geographía'' = "geography" meaning also distribution) or botanical geography i .... References Dugand's antwren Birds of the Colombian Amazon Birds of the Ecuadorian Amazon Birds of the Peruvian Amazon Dugand's antwren Dugand's antwren Taxonomy articles created by Polbot {{Thamnophilidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lepidoptera
Lepidoptera ( ) is an order (biology), order of insects that includes butterfly, butterflies and moths (both are called lepidopterans). About 180,000 species of the Lepidoptera are described, in 126 Family (biology), families and 46 Taxonomic rank, superfamilies, 10 percent of the total described species of living organisms. It is one of the most widespread and widely recognizable insect orders in the world. The Lepidoptera show many variations of the basic body structure that have evolved to gain advantages in lifestyle and distribution. Recent estimates suggest the order may have more species than earlier thought, and is among the four most wikt:speciose, speciose orders, along with the Hymenoptera, fly, Diptera, and beetle, Coleoptera. Lepidopteran species are characterized by more than three derived features. The most apparent is the presence of scale (anatomy), scales that cover the torso, bodies, wings, and a proboscis. The scales are modified, flattened "hairs", and give ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Least-concern Species
A least-concern species is a species that has been categorized by the International Union for Conservation of Nature (IUCN) as evaluated as not being a focus of species conservation because the specific species is still plentiful in the wild. They do not qualify as threatened, near threatened, or (before 2001) conservation dependent. Species cannot be assigned the "Least Concern" category unless they have had their population status evaluated. That is, adequate information is needed to make a direct, or indirect, assessment of its risk of extinction based on its distribution or population status. Evaluation Since 2001 the category has had the abbreviation "LC", following the IUCN 2001 Categories & Criteria (version 3.1). Before 2001 "least concern" was a subcategory of the "Lower Risk" category and assigned the code "LR/lc" or lc. Around 20% of least concern taxa (3261 of 15636) in the IUCN database still use the code "LR/lc", which indicates they have not been re-evaluate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mineral Industry Of Peru
The mineral industry provides a major source of economic growth in Peru's national development. In 2019, the country was the 2nd largest world producer of copper and silver, 8th largest world producer of gold, 3rd largest world producer of lead, 2nd largest world producer of zinc, 4th largest world producer of tin, 5th largest world producer of boron and 4th largest world producer of molybdenum. In 2006, Peru occupied a leading position in the global production of the following mineral commodities: fourth in arsenic trioxide, third in bismuth, third in copper, fifth in gold, fourth in lead, fourth in molybdenum, fourth in rhenium, first in silver, third in tin, and third in zinc. In Latin America, Peru was the first ranked producer of, in order of value, gold, silver, zinc, lead, tin, and tellurium and the second ranked producer of copper, molybdenum, and bismuth.Gurmendi, Alfredo C"The Mineral Industry of Peru"(PDF). ''2006 Minerals Yearbook''. United States Geological Survey ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydrocarbon Exploration
Hydrocarbon exploration (or oil and gas exploration) is the search by petroleum geologists and geophysicists for deposits of hydrocarbons, particularly petroleum and natural gas, in the Earth using petroleum geology. Exploration methods Visible surface features such as oil seeps, natural gas seeps, pockmarks (underwater craters caused by escaping gas) provide basic evidence of hydrocarbon generation (be it shallow or deep in the Earth). However, most exploration depends on highly sophisticated technology to detect and determine the extent of these deposits using exploration geophysics. Areas thought to contain hydrocarbons are initially subjected to a gravity survey, magnetic survey, passive seismic or regional seismic reflection surveys to detect large-scale features of the sub-surface geology. Features of interest (known as ''leads'') are subjected to more detailed seismic surveys which work on the principle of the time it takes for reflected sound waves to travel throu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
