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Helena's Marsupial Frog
Helena's marsupial frog (''Gastrotheca helenae'') is a species of frog in the family Hemiphractidae. It is endemic to the Páramo de Tamá on the Venezuelan-Colombian border and occurs in Apure and Táchira states of Venezuela and Norte de Santander Department on the Cordillera Oriental of Colombia. It is named after Helen Gaige, an American herpetologist. Description ''Gastrotheca helenae'' is a large marsupial frog. The holotype, an adult female, measured in snout–vent length. The dorsum is smooth and bright green in color; the sides and belly are reddish brown with white markings. The belly and throat are quite rugose. The toes are about half-webbed whereas the fingers have only traces of webbing. Habitat and conservation Its natural habitats are cloud forests and páramo at elevations of above sea level. It is much more easily heard than seen. The species occurs in the Tamá National Natural Park in Colombia and El Tamá National Park The El Tamá National Park () It ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Emmett Reid Dunn
Emmett Reid Dunn (November 21, 1894 – February 13, 1956) was an American herpetologist and educator who worked in Panama and studied salamanders in the Eastern United States. Early life and education Emmett Reid Dunn was born on November 21, 1894, in Arlington, Virginia, to Emmett Clark Dunn, a civil engineer, and Mary Reid. He spent much of his childhood at a family farm near the James River in Nelson County. He attended Haverford College in Philadelphia, receiving his B.A. and M.A. in 1915 and 1916, respectively. His childhood connection to Arlington allowed him to connect with his first professional mentor, Leonhard Stejneger, the Curator of Reptiles and Amphibians at the Smithsonian Institution, who in 1913 suggested he study salamanders. Henry Sherring Pratt, his professor at Haverford, also guided him. He received his PhD from Harvard University in 1921. Career In 1915, Dunn began publishing scientific papers on snakes and herpetofauna, based on field research he cond ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Habitat
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 Biophysical environment, 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 Luminous intensity, light intensity. Biotic index, Biotic factors include the availability of food and the presence or absence of Predation, 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 ge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amphibians Described In 1944
Amphibians are ectothermic, anamniotic, four-limbed vertebrate animals that constitute the class Amphibia. In its broadest sense, it is a paraphyletic group encompassing all tetrapods, but excluding the amniotes (tetrapods with an amniotic membrane, such as modern reptiles, birds and mammals). All extant (living) amphibians belong to the monophyletic subclass Lissamphibia, with three living orders: Anura (frogs and toads), Urodela (salamanders), and Gymnophiona (caecilians). Evolved to be mostly semiaquatic, amphibians have adapted to inhabit a wide variety of habitats, with most species living in freshwater, wetland or terrestrial ecosystems (such as riparian woodland, fossorial and even arboreal habitats). Their life cycle typically starts out as aquatic larvae with gills known as tadpoles, but some species have developed behavioural adaptations to bypass this. Young amphibians generally undergo metamorphosis from an aquatic larval form with gills to an air-breathing adu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
