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Anoura Fistulata
''Anoura'' is a genus of leaf-nosed bats from Central and South America. ''Anoura'' members lack or have a short tail, and are nectarivorous bats of small to medium size among the Phyllostomidae. Etymology The genus ''Anoura'' was described in 1838 by British zoologist John Edward Gray. The type species for the genus was the Geoffroy's tailless bat, ''Anoura geoffroyi''. The etymology of the genus name ''Anoura'' corresponds to the two ancient greek words (), expressing the "absence" (this prefix is an alpha privative), and (), meaning "animal tail". It refers to the tailless character of these bats. Note that ''Anoura'', the bat genus, should not be confused with neither ' Anura', an order of amphibians, nor ' Anoures', the original spelling of this order. Description ''Anoura'' species are small, with head and body lengths ranging from . Forearm lengths for the genus are . They either totally lack tails or have very short tails of . They have elongated snouts, as is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geoffroy's Tailless Bat
Geoffroy's tailless bat (''Anoura geoffroyi'') is a species of phyllostomid bat from the American tropics. Description Geoffroy's tailless bat is a medium-sized bat, measuring around in total length and weighing . It has dark to dull brown fur over much of its body, with greyish-brown underparts and silvery-grey fur on the neck and shoulders. The wings are black or very dark brown, while the membrane between the legs is relatively small and covered in hair. As its name suggests, the bat does not possess a tail. It has a long muzzle, a projecting lower jaw, and short, rounded ears. Its tongue is long and narrow, with a pointed tip covered with fine papillae that help to draw up nectar when it feeds. Males and females do not vary much in size in Brazil, but in Trinidad, another area where ''Anoura geoffroyi'' lives, the females are reported to have slightly longer forearms than the males. Distribution and habitat Geoffroy's tailless bat is found from northern Mexico, through much ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Type Species
In zoological nomenclature, a type species (''species typica'') is the species name with which the name of a genus or subgenus is considered to be permanently taxonomically associated, i.e., the species that contains the biological type specimen(s). Article 67.1 A similar concept is used for suprageneric groups and called a type genus. In botanical nomenclature, these terms have no formal standing under the code of nomenclature, but are sometimes borrowed from zoological nomenclature. In botany, the type of a genus name is a specimen (or, rarely, an illustration) which is also the type of a species name. The species name that has that type can also be referred to as the type of the genus name. Names of genus and family ranks, the various subdivisions of those ranks, and some higher-rank names based on genus names, have such types. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tailed Tailless Bat
The tailed tailless bat (''Anoura caudifer'') is a species of leaf-nosed bat from South America. Taxonomy The scientific name of this species is variously given as either ''A. caudifer'' or ''A. caudifera'', with scientists having argued for both names on the basis of Latin grammar and of the ICZN rules on the naming of species. When Étienne Geoffroy Saint-Hilaire first described the bat in 1818, he used the species name "''caudifer''", and this is the name currently preferred by such influential sources as the International Union for Conservation of Nature and ''Mammal Species of the World''. The common name of the bat is typically given as the "tailed tailless bat". This is because the species belongs to the genus ''Anoura'', commonly called the "tailless bats", yet it possesses a tail. However, the name is arguably somewhat misleading, since only three of the other seven species of "tailless bats" genuinely lack a tail. Of the remaining four, however, three have tails that a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mixture Model
In statistics, a mixture model is a probabilistic model for representing the presence of subpopulations within an overall population, without requiring that an observed data set should identify the sub-population to which an individual observation belongs. Formally a mixture model corresponds to the mixture distribution that represents the probability distribution of observations in the overall population. However, while problems associated with "mixture distributions" relate to deriving the properties of the overall population from those of the sub-populations, "mixture models" are used to make statistical inferences about the properties of the sub-populations given only observations on the pooled population, without sub-population identity information. Mixture models should not be confused with models for compositional data, i.e., data whose components are constrained to sum to a constant value (1, 100%, etc.). However, compositional models can be thought of as mixture models, wh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Principal Component Analysis
Principal component analysis (PCA) is a popular technique for analyzing large datasets containing a high number of dimensions/features per observation, increasing the interpretability of data while preserving the maximum amount of information, and enabling the visualization of multidimensional data. Formally, PCA is a statistical technique for reducing the dimensionality of a dataset. This is accomplished by linearly transforming the data into a new coordinate system where (most of) the variation in the data can be described with fewer dimensions than the initial data. Many studies use the first two principal components in order to plot the data in two dimensions and to visually identify clusters of closely related data points. Principal component analysis has applications in many fields such as population genetics, microbiome studies, and atmospheric science. The principal components of a collection of points in a real coordinate space are a sequence of p unit vectors, where th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cadena's Tailless Bat
Cadena's tailless bat (''Anoura cadenai'') is a species of bat native to Colombia. In 2006 it was described as a separate species from the tailed tailless bat species complex. Taxonomy and etymology Cadena's tailless bat was species description, described as a new species in 2006. The holotype had been collected between Calima, Valle del Cauca, Calima and Restrepo, Valle del Cauca, Restrepo in Colombia. The species was named after Alberto Cadena, curator of the collection of mammals of the Instituto de Ciencias Naturales (Bogota). Description Its fur is a blackish-brown color. Its forearm length is . Ecology The ecology of this species is poorly understood due to its recent description. Specimens were recorded at relatively high altitudes (between 800 and 1600m), in habitats of the Andean forest with mature trees covered by epiphytes. This species is sympatric with two other species from the genus Anoura : ''Tailed tailless bat, A. caudifer'' and ''Handley's tailless bat, A. cu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Morphology (biology)
Morphology is a branch of biology dealing with the study of the form and structure of organisms and their specific structural features. This includes aspects of the outward appearance (shape, structure, colour, pattern, size), i.e. external morphology (or eidonomy), as well as the form and structure of the internal parts like bones and organs, i.e. internal morphology (or anatomy). This is in contrast to physiology, which deals primarily with function. Morphology is a branch of life science dealing with the study of gross structure of an organism or taxon and its component parts. History The etymology of the word "morphology" is from the Ancient Greek (), meaning "form", and (), meaning "word, study, research". While the concept of form in biology, opposed to function, dates back to Aristotle (see Aristotle's biology), the field of morphology was developed by Johann Wolfgang von Goethe (1790) and independently by the German anatomist and physiologist Karl Friedrich Burdach ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lingual Papillae
Lingual papillae (singular papilla) are small structures on the upper surface of the tongue that give it its characteristic rough texture. The four types of papillae on the human tongue have different structures and are accordingly classified as circumvallate (or vallate), fungiform, filiform, and foliate. All except the filiform papillae are associated with taste buds. Structure In living subjects, lingual papillae are more readily seen when the tongue is dry. There are four types of papillae present on the tongue: Filiform papillae Filiform papillae are the most numerous of the lingual papillae. They are fine, small, cone-shaped papillae covering most of the dorsum of the tongue. They are responsible for giving the tongue its texture and are responsible for the sensation of touch. Unlike the other kinds of papillae, filiform papillae do not contain taste buds. They cover most of the front two-thirds of the tongue's surface. They appear as very small, conical or cylindrical s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glossophaga
''Glossophaga'' (long-tongued bat) is a genus of bats in the leaf-nosed bat family, Phyllostomidae. Members of the genus are native to the American Neotropics. Species *''G. antillarum'' (Rehn, 1902): Jamaican long-tongued bat, Jamaica. *''G. bakeri'' (Webster & J. K. Jones, 1987): Baker's long-tongued bat, South America. *''G. commissarisi'' ( Gardner, 1962): Commissaris's long-tongued bat - Central and South America. *''G. leachii'' (Gray, 1844): gray long-tongued bat - Mexico, Central America. *''G. longirostris'' (Miller, 1898): Miller's long-tongued bat - Northern South America, Windward Islands. *''G. morenoi'' ( Martinez & Villa, 1938): western long-tongued bat - Mexico. *''G. mutica'' (Merriam, 1898): Merriam's long-tongued bat, Mexico, Central America, northern South America *''G. soricina'' ( Pallas, 1766): Pallas's long-tongued bat - Central and South America. *''G. valens'' (Miller, 1913): Ecuadorian long-tongued bat Ecuadorians ( es, ecuatorianos) are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Snout
A snout is the protruding portion of an animal's face, consisting of its nose, mouth, and jaw. In many animals, the structure is called a muzzle, rostrum, or proboscis. The wet furless surface around the nostrils of the nose of many mammals is called the rhinarium (colloquially this is the "cold wet snout" of some mammals). The rhinarium is often associated with a stronger sense of olfaction. Variation Snouts are found on many mammals in a variety of shapes. Some animals, including ursines and great cats, have box-like snouts, while others, like shrews, have pointed snouts. Pig snouts are flat and cylindrical. Primates Strepsirrhine primates have muzzles, as do baboons. Great apes have reduced muzzles, with the exception being human beings, whose face does not have protruding jaws nor a snout but merely a human nose. Dogs The muzzle begins at the stop, just below the eyes, and includes the dog's nose and mouth. In the domestic dog, most of the upper muzzle contains organs for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amphibians
Amphibians are four-limbed and ectothermic vertebrates of the class Amphibia. All living amphibians belong to the group Lissamphibia. They inhabit a wide variety of habitats, with most species living within terrestrial, fossorial, arboreal or freshwater aquatic ecosystems. Thus amphibians typically start out as larvae living in water, but some species have developed behavioural adaptations to bypass this. The young generally undergo metamorphosis from larva with gills to an adult air-breathing form with lungs. Amphibians use their skin as a secondary respiratory surface and some small terrestrial salamanders and frogs lack lungs and rely entirely on their skin. They are superficially similar to reptiles like lizards but, along with mammals and birds, reptiles are amniotes and do not require water bodies in which to breed. With their complex reproductive needs and permeable skins, amphibians are often ecological indicators; in recent decades there has been a dramatic decli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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