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Exuvia
In biology, exuviae are the remains of an exoskeleton and related structures that are left after ecdysozoans (including insects, crustaceans and arachnids) have molted. The exuviae of an animal can be important to biologists as they can often be used to identify the species of the animal and even its sex. As studying insects, crustaceans, or arachnids directly is not always possible, and because exuviae can be collected fairly easily, they can play an important part in helping to determine some general aspects of a species' overall life cycle such as distribution, sex ratio, production, and proof of breeding in a habitat. Exuviae have been suggested as a "gold standard" for insect monitoring. For instance, when monitoring dragonfly populations, the presence of exuviae of a species demonstrates that the species has completed its full life cycle from egg to adult in a habitat. However, it has also been suggested that the fact that exuviae can be hard to find could lead to an und ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ecdysis
Ecdysis is the moulting of the cuticle in many invertebrates of the clade Ecdysozoa. Since the cuticle of these animals typically forms a largely inelastic exoskeleton, it is shed during growth and a new, larger covering is formed. The remnants of the old, empty exoskeleton are called exuviae. After moulting, an arthropod is described as ''teneral'', a ''callow''; it is "fresh", pale and soft-bodied. Within one or two hours, the cuticle hardens and darkens following a Tanning (leather), tanning process analogous to the production of leather. During this short phase the animal expands, since growth is otherwise constrained by the rigidity of the exoskeleton. Growth of the limbs and other parts normally covered by the hard exoskeleton is achieved by transfer of body fluids from soft parts before the new skin hardens. A spider with a small abdomen may be undernourished but more probably has recently undergone ecdysis. Some arthropods, especially large insects with tracheal respira ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Exoskeleton
An exoskeleton () . is a skeleton that is on the exterior of an animal in the form of hardened integument, which both supports the body's shape and protects the internal organs, in contrast to an internal endoskeleton (e.g. human skeleton, that of a human) which is enclosed underneath other soft tissues. Some large, hard and non-flexible protective exoskeletons are known as mollusc shell, shell or armour (anatomy), armour. Examples of exoskeletons in animals include the arthropod exoskeleton, cuticle skeletons shared by arthropods (insects, chelicerates, myriapods and crustaceans) and tardigrades, as well as the corallite, skeletal cups formed by hardened secretion of stony corals, the test (biology), test/tunic of sea squirts and sea urchins, and the prominent mollusc shell shared by snails, bivalvia, clams, tusk shells, chitons and nautilus. Some vertebrate animals, such as the turtle, have both an endoskeleton and a turtle shell, protective exoskeleton. Role Exoskeletons c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orchid Mantis
''Hymenopus coronatus'' is a mantis from the tropical forests of Southeast Asia. It is known by various common names, including walking flower mantis, orchid-blossom mantis and (pink) orchid mantis. It is one of several species known as '' flower mantis'', a reference to their unique physical form and behaviour, which often involves moving with a “swaying” motion, as if being “blown” in the breeze. Several species have evolved to mimic orchid flowers as a hunting and camouflaging strategy, “hiding” themselves in plain view and preying upon pollinating insects that visit the blooms. They are known to grab their prey with blinding speed. Description This species mimics parts of the orchid flower. The four walking legs resemble flower petals, and the toothed front pair is used as in other mantises for grasping prey. ''H. coronatus'' shows some of the most pronounced size sexual dimorphism Sexual dimorphism is the condition where sexes of the same species exhibit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Biology
Biology is the scientific study of life and living organisms. It is a broad natural science that encompasses a wide range of fields and unifying principles that explain the structure, function, growth, History of life, origin, evolution, and distribution of life. Central to biology are five fundamental themes: the cell (biology), cell as the basic unit of life, genes and heredity as the basis of inheritance, evolution as the driver of biological diversity, energy transformation for sustaining life processes, and the maintenance of internal stability (homeostasis). Biology examines life across multiple biological organisation, levels of organization, from molecules and cells to organisms, populations, and ecosystems. Subdisciplines include molecular biology, physiology, ecology, evolutionary biology, developmental biology, and systematics, among others. Each of these fields applies a range of methods to investigate biological phenomena, including scientific method, observation, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monarch Butterfly
The monarch butterfly or simply monarch (''Danaus plexippus'') is a milkweed butterfly (subfamily Danainae) in the family Nymphalidae. Other common names, depending on region, include milkweed, common tiger, wanderer, and black-veined brown. It is among the most familiar of List of butterflies of North America, North American butterflies and an iconic pollinator, although it is not an especially effective pollinator of milkweeds. Its wings feature an easily recognizable black, orange, and white pattern, with a wingspan of . A Müllerian mimic, the viceroy butterfly, is similar in color and pattern, but is markedly smaller and has an extra black stripe across each hindwing. The eastern North American monarch population is notable for its annual southward late-summer/autumn instinctive Monarch butterfly migration, migration from the northern and central United States and southern Canada to Florida and Mexico. During the fall migration, monarchs cover thousands of miles, with a co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Large Milkweed Bug
''Oncopeltus fasciatus'', known as the large milkweed bug, is a medium-sized hemipteran (true bug) of the family Lygaeidae.Attisano, A. (2013) Oosorption and migratory strategy of the milkweed bug,''Oncopeltus fasciatus. Animal Behaviour 86(3):651-657.'' It is distributed throughout North America, from Central America through Mexico and the Caribbean to southern areas in Canada. Costa Rica represents this insect's southern limit. It inhabits disturbed areas, roadsides, and open pastures.Dingle, H., Palmer, J.O., Leslie, J.F. (1986) Behaviour genetics of flexible life histories in milkweed bugs (''Onceopeltus fasciatus''). Evolutionary Genetics of Invertebrate Behavior. New York: Plenum Press. Due to this widespread geographic distribution, this insect exhibits varying life history trade-offs depending on the population location, including differences in wing length and other traits based on location. Identification Adults can range from 11 to 12 mm in length and have a red ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anax Imperator
The emperor dragonfly or blue emperor (''Anax imperator'') is a large species of hawker dragonfly of the family Aeshnidae. It is the largest dragonfly in most of Europe, including the United Kingdom, although exceeded in some areas by other species. Nomenclature The generic name ''Anax'' is from the ancient Greek , "lord"; the specific epithet ''imperator'' is the Latin for "emperor", from ''imperare'', to command. Distribution This dragonfly has a wide distribution through Afroeurasia; it is found throughout Africa and through most of Europe, the Arabian Peninsula, and south-western and central Asia. Since the 1990s, its range has expanded in Europe, both northwards and to higher altitudes. For example, the first Scandinavian record was in 1994 in Denmark; in 2002 it was first recorded in Sweden and in 2004 first in Scotland; today it is regular in all three countries. The species' northward expansion has been tied to global warming, and it is among the first odonata to do so. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Platypleura
''Platypleura'' is a genus of cicadas, occurring widely across Africa and southern Asia; it belongs to the tribe Platypleurini and species previously included here are now placed in other genera, such as '' Planopleura'' and '' Dyticopycna''. Some of the South African species are remarkable for their endothermic thermoregulation that enables crepuscular signalling, an adaptation that reduces risk of predation and enables a greater range for their calls. In field experiments their maximum body temperature while calling at dusk, was measured at 22 °C above ambient temperature. The Platypleurini are distributed from the Cape in South Africa, throughout sub-Saharan Africa and Madagascar, through India and south-eastern Asia, to Japan. The faunas of West Africa and Madagascar are distinctive, while those of southern and east Africa resemble the Asian group. Endothermy occurs in several large-bodied South American and South African species, but not in related small-bodied specie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anyphops
''Anyphops'' is a genus of Selenopidae, wall spiders that was first described by P. L. G. Benoit in 1968. Species it contains sixty-four species, found in Africa and on Saint Helena: *''Anyphops alticola, A. alticola'' (Lawrence, 1940) – South Africa *''Anyphops amatolae, A. amatolae'' (Lawrence, 1940) – South Africa *''Anyphops atomarius, A. atomarius'' (Simon, 1887) (Type_species, type) – Southern Africa *''Anyphops barbertonensis, A. barbertonensis'' (Lawrence, 1940) – Somalia, South Africa *''Anyphops barnardi, A. barnardi'' (Lawrence, 1940) – Zimbabwe *''Anyphops basutus, A. basutus'' (Reginald Innes Pocock, Pocock, 1901) – Lesotho *''Anyphops bechuanicus, A. bechuanicus'' (Lawrence, 1940) – Botswana *''Anyphops benoiti, A. benoiti'' Corronca, 1998 – Madagascar *''Anyphops braunsi, A. braunsi'' (Lawrence, 1940) – South Africa *''Anyphops broomi, A. broomi'' (Pocock, 1900) – South Africa *''Anyphops caledonicus, A. caledonicus'' (Lawrence, 1940) – South A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Propertius
Sextus Propertius was a Latin elegiac poet of the Augustan age. He was born around 50–45 BC in Assisium (now Assisi) and died shortly after 15 BC. Propertius' surviving work comprises four books of '' Elegies'' ('). He was a friend of the poets Gallus and Virgil and, with them, had as his patron Maecenas and, through Maecenas, the emperor Augustus. Although Propertius was not as renowned in his own time as other Latin elegists, he is today regarded by scholars as a major poet. Life Very little information exists about Propertius outside of his own writing. His praenomen "Sextus" is mentioned by Aelius Donatus, a few manuscripts list him as "Sextus Propertius", but the rest of his name is unknown. From numerous references in his poetry it is clear he was born and raised in Umbria, of a well-to-do family at or near Asisium (Assisi). His birthplace is generally regarded as modern Assisi, where tourists can view the excavated remains of a house thought to have belonged at l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Habitat (ecology)
In ecology, habitat refers to the array of resources, biotic factors that are present in an area, such as to support the survival and reproduction of a particular species. A species' habitat can be seen as the physical manifestation of its ecological niche. Thus "habitat" is a species-specific term, fundamentally different from concepts such as environment or vegetation assemblages, for which the term "habitat-type" is more appropriate. The physical factors may include (for example): soil, moisture, range of temperature, and light intensity. Biotic factors include the availability of food and the presence or absence of predators. Every species has particular habitat requirements, habitat generalist species are able to thrive in a wide array of environmental conditions while habitat specialist species require a very limited set of factors to survive. The habitat of a species is not necessarily found in a geographical area, it can be the interior of a stem, a rotten log, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neologism
In linguistics, a neologism (; also known as a coinage) is any newly formed word, term, or phrase that has achieved popular or institutional recognition and is becoming accepted into mainstream language. Most definitively, a word can be considered a neologism once it is published in a dictionary. Neologisms are one facet of lexical innovation, i.e., the linguistic process of new terms and meanings entering a language's lexicon. The most precise studies into language change and word formation, in fact, identify the process of a "neological continuum": a '' nonce word'' is any single-use term that may or may not grow in popularity; a '' protologism'' is such a term used exclusively within a small group; a ''prelogism'' is such a term that is gaining usage but is still not mainstream; and a ''neologism'' has become accepted or recognized by social institutions. Neologisms are often driven by changes in culture and technology. Popular examples of neologisms can be found in science, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
