|
Cyclura Rileyi Rileyi
''Cyclura rileyi'', commonly known as the Bahamian rock iguana or the San Salvador rock iguana, is a critically endangered species of lizard in the family Iguanidae. The species is native to three island groups in the Bahamas, and is in decline due to habitat encroachment by human development and predation by feral dogs and cats. There are three subspecies: the Acklins ground iguana (''Cyclura rileyi nuchalis''), the White Cay iguana (''Cyclura rileyi cristata''), and the nominotypical subspecies (''Cyclura rileyi rileyi)''. Taxonomy and etymology The San Salvador rock iguana is an endangered species of lizard of the genus '' Cyclura'' in the family Iguanidae. First described by Leonhard Stejneger in 1903, it is known commonly in the Bahamas as simply "iguana". Its specific name, ''rileyi'', is a Latinized form of the surname of American ornithologist Joseph Harvey Riley, who collected the holotype.Beolens, Bo; Watkins, Michael; Grayson, Michael (2011). ''The Eponym Dicti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leonhard Stejneger
Leonhard Hess Stejneger (30 October 1851 – 28 February 1943) was a Norwegian-born American ornithologist, herpetologist and zoologist. Stejneger specialized in vertebrate natural history studies. He gained his greatest reputation with reptiles and amphibians. Wetmore, Alexander (1945). "Leonhard Hess Stejneger (1851-1943)". ''Biographical Memoir. Nat. Acad. Sci.'' 24: 145-195PDF/ref> Early life and family Stejneger was born in Bergen, Norway. His father was Peter Stamer Steineger, a merchant and auditor; his mother was Ingeborg Catharine (née Hess). Leonhard was the eldest of seven children. His sister Agnes Steineger was a Norwegian artist. Until 1880, the Steineger family had been one of the wealthy families in Bergen; at that time business reverses led to the father declaring bankruptcy. Stejneger attended the Smith Theological School in Bergen from 1859 to 1860, and Bergen Latin School until 1869. His interests in zoology developed early. By age sixteen he had a print ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus comes above species and below family (taxonomy), family. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus. :E.g. ''Panthera leo'' (lion) and ''Panthera onca'' (jaguar) are two species within the genus ''Panthera''. ''Panthera'' is a genus within the family Felidae. The composition of a genus is determined by taxonomy (biology), taxonomists. The standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. There are some general practices used, however, including the idea that a newly defined genus should fulfill these three criteria to be descriptively useful: # monophyly – all descendants ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dorsum (biology)
Standard anatomical terms of location are used to unambiguously describe the anatomy of animals, including humans. The terms, typically derived from Latin or Greek language, Greek roots, describe something in its standard anatomical position. This position provides a definition of what is at the front ("anterior"), behind ("posterior") and so on. As part of defining and describing terms, the body is described through the use of anatomical planes and anatomical axis, anatomical axes. The meaning of terms that are used can change depending on whether an organism is bipedal or quadrupedal. Additionally, for some animals such as invertebrates, some terms may not have any meaning at all; for example, an animal that is radially symmetrical will have no anterior surface, but can still have a description that a part is close to the middle ("proximal") or further from the middle ("distal"). International organisations have determined vocabularies that are often used as standard vocabular ... [...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] |
Cyclura Rileyi Rileyi Low Cay 2004 C W K Hayes
''Cyclura'' is a genus of lizards in the family Iguanidae. Member species of this genus are commonly known as "cycluras" or more commonly as rock iguanas and only occur on islands in the West Indies. Rock iguanas have a high degree of endemism, with in most cases a single species or subspecies restricted to an individual island. Taxonomy The genus ''Cyclura'' was first circumscribed by Richard Harlan in 1825 to include two new species of lizard: ''C. carinata'' and ''C. teres''. ''C. teres'' eventually turned out to be a junior synonym of ''Ctenosaura acanthura''. In the 20th century there were eight recognised species of ''Cyclura'' and nine additional subspecies (one extinct) besides the nominotypical subspecies. Recently, certain subspecies were elevated to species status. Currently, there are ten species in this genus. Habitat Rock iguanas most often inhabit subtropical zones, of Caribbean island dry forest biomes. These landscapes are characterised by rocky outcrops, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cyclura Rileyi Nuchalis
The Acklins ground iguana (''Cyclura rileyi nuchalis''), also commonly known as the Watling Island iguana, is an endangered subspecies of lizard of the genus '' Cyclura'' it is one of three subspecific forms of ''Cyclura rileyi'' in the family Iguanidae. Taxonomy The Acklins ground iguana is a recognized subspecies of the San Salvador rock iguana, recognized as such since 1975. Its specific name, ''rileyi'', is a Latinized form of the name of American biologist, Joseph Harvey Riley. Anatomy and morphology The Acklins ground iguana strongly resembles the San Salvador rock iguana in color and shape. The lizard's back color can range from red, orange or yellow, to green, brown or grey, usually patterned by darker markings. The very brightest colors (red, orange or yellow) are normally only displayed by males and are more pronounced which at warmer body temperatures. Immature iguanas lack these bright colors, being either solid brown or grey with faint slightly darker stripe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cyclura Rileyi Nuchalis Exumas 1997 C W K Hayes
''Cyclura'' is a genus of lizards in the family Iguanidae. Member species of this genus are commonly known as "cycluras" or more commonly as rock iguanas and only occur on islands in the West Indies. Rock iguanas have a high degree of endemism, with in most cases a single species or subspecies restricted to an individual island. Taxonomy The genus ''Cyclura'' was first circumscribed by Richard Harlan in 1825 to include two new species of lizard: ''C. carinata'' and ''C. teres''. ''C. teres'' eventually turned out to be a junior synonym of ''Ctenosaura acanthura''. In the 20th century there were eight recognised species of ''Cyclura'' and nine additional subspecies (one extinct) besides the nominotypical subspecies. Recently, certain subspecies were elevated to species status. Currently, there are ten species in this genus. Habitat Rock iguanas most often inhabit subtropical zones, of Caribbean island dry forest biomes. These landscapes are characterised by rocky outcrops, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cyclura Rileyi Cristata White Cay 1997 C W K Hayes
''Cyclura'' is a genus of lizards in the family Iguanidae. Member species of this genus are commonly known as "cycluras" or more commonly as rock iguanas and only occur on islands in the West Indies. Rock iguanas have a high degree of endemism, with in most cases a single species or subspecies restricted to an individual island. Taxonomy The genus ''Cyclura'' was first circumscribed by Richard Harlan in 1825 to include two new species of lizard: ''C. carinata'' and ''C. teres''. ''C. teres'' eventually turned out to be a junior synonym of ''Ctenosaura acanthura''. In the 20th century there were eight recognised species of ''Cyclura'' and nine additional subspecies (one extinct) besides the nominotypical subspecies. Recently, certain subspecies were elevated to species status. Currently, there are ten species in this genus. Habitat Rock iguanas most often inhabit subtropical zones, of Caribbean island dry forest biomes. These landscapes are characterised by rocky outcrops, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cyclura Rileyi Rileyi (San Salvador Rock Iguana) (Green Cay, Offshore From Northwestern San Salvador Island, Bahamas) 5 (15418496034)
''Cyclura rileyi'', commonly known as the Bahamian rock iguana or the San Salvador rock iguana, is a critically endangered species of lizard in the family Iguanidae. The species is native to three island groups in the Bahamas, and is in decline due to habitat encroachment by human development and predation by feral dogs and cats. There are three subspecies: the Acklins ground iguana (''Cyclura rileyi nuchalis''), the White Cay iguana (''Cyclura rileyi cristata''), and the nominotypical subspecies (''Cyclura rileyi rileyi)''. Taxonomy and etymology The San Salvador rock iguana is an endangered species of lizard of the genus '' Cyclura'' in the family Iguanidae. First described by Leonhard Stejneger in 1903, it is known commonly in the Bahamas as simply "iguana". Its specific name, ''rileyi'', is a Latinized form of the surname of American ornithologist Joseph Harvey Riley, who collected the holotype.Beolens, Bo; Watkins, Michael; Grayson, Michael (2011). ''The Eponym Dicti ... [...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] |
Joseph Harvey Riley
Joseph Harvey Riley (September 19, 1873 – December 17, 1941) was an American ornithologist. Born in Falls Church, Virginia, Riley was employed at the Smithsonian Institution from 1896 until his death, becoming Associate Curator of the Division of Birds in 1932. A species of Bahamian iguana, '' Cyclura rileyi'', is named in his honor.Beolens, Bo; Watkins, Michael; Grayson, Michael (2011). ''The Eponym Dictionary of Reptiles''. Baltimore: Johns Hopkins University Press. xiii + 296 pp. . ("Riley", p. 222). The following subspecies In biological classification, subspecies is a rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics (morphology), but that can successfully interbreed. Not all species ... of birds are named in his honor: '' Broderipus chinensis rileyi'', '' Coracina temminchii rileyi'', '' Coccyzus minor rileyi'', '' Myophonus caeruleus rileyi'', '' Strix indranee rileyi'', and '' Pipilo al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ornithology
Ornithology is a branch of zoology that concerns the "methodological study and consequent knowledge of birds with all that relates to them." Several aspects of ornithology differ from related disciplines, due partly to the high visibility and the aesthetic appeal of birds. It has also been an area with a large contribution made by amateurs in terms of time, resources, and financial support. Studies on birds have helped develop key concepts in biology including evolution, behaviour and ecology such as the definition of species, the process of speciation, instinct, learning, ecological niches, guilds, island biogeography, phylogeography, and conservation. While early ornithology was principally concerned with descriptions and distributions of species, ornithologists today seek answers to very specific questions, often using birds as models to test hypotheses or predictions based on theories. Most modern biological theories apply across life forms, and the number of scientists w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.jpg "Click for more on -> Ornithology")