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Beatragus
''Beatragus'' is a genus of alcelaphinae, alcelaphine antelope. The hirola ''(Beatragus hunteri)'' is the only living representative, but a couple of extinct species are known, all from Africa. The hirola and the larger ''Beatragus antiquus'' may together represent different phases of a chronospecies; the living hirola probably declined in size as a result of an ecologically impoverished landscape. References {{Authority control Mammal genera Mammal genera with one living species Alcelaphinae Mammals described in 1912 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hirola
The hirola (''Beatragus hunteri''), also called the Hunter's hartebeest or Hunter's antelope, is a critically endangered antelope species found as of now, only in Kenya along the border of Somalia. It was first described by the big game hunter and zoologist H.C.V. Hunter in 1888. It is the only living member of the genus ''Beatragus'', though other species are known from the fossil record. The global hirola population is estimated at 300–500 animals and there are none in captivity. According to a document produced by the International Union for Conservation of Nature "the loss of the hirola would be the first extinction of a mammalian genus on mainland Africa in modern human history". Description The hirola is a medium-sized antelope, tan to rufous-tawny in colour with slightly lighter under parts, predominantly white inner ears and a white tail which extends down to the hocks. It has very sharp, lyrate horns which lack a basal pedicle and are ridged along three quarters of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beatragus Vrbae
''Beatragus'' is a genus of alcelaphine antelope. The hirola ''(Beatragus hunteri)'' is the only living representative, but a couple of extinct species are known, all from Africa. The hirola and the larger '' Beatragus antiquus'' may together represent different phases of a chronospecies A chronospecies is a species derived from a sequential development pattern that involves continual and uniform changes from an extinct ancestral form on an evolutionary scale. The sequence of alterations eventually produces a population that is p ...; the living hirola probably declined in size as a result of an ecologically impoverished landscape. References {{Authority control Mammal genera Mammal genera with one living species Alcelaphinae Mammals described in 1912 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alcelaphinae
The subfamily Alcelaphinae (or Tribe (biology), tribe Alcelaphini), of the family Bovidae, contains the wildebeest, tsessebe, topi, hartebeest, blesbok and bontebok, and several other related species. Depending on the classification, there are 6–10 species placed in four genera, although ''Beatragus'' is sometimes considered a subgenus of ''Damaliscus'', while ''Sigmoceros'' is sometimes considered for the Lichtenstein's hartebeest. Subfamily Alcelaphinae * Genus ''Beatragus'' ** Hirola, ''Beatragus hunteri'' * Genus ''Damaliscus'' ** Tsessebe, ''D. lunatus'' *** Korrigum, ''D. lunatus korrigum'' *** Topi, ''D. lunatus jimela'' *** Coastal topi, ''D. lunatus topi'' ** Bontebok, ''D. pygargus'' *** Bontebok (subspecies), ''D. p. pygargus'' *** Blesbok, ''D. p. phillipsi'' * Genus ''Alcelaphus'' ** Hartebeest, ''A. buselaphus'' *** Bubal hartebeest, †''A. b. buselaphus'' *** Coke's hartebeest, ''A. b. cokii'' *** Lelwel hartebeest, ''A. b. lelwel'' *** Western hartebeest, ''A. b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beatragus Antiquus
''Beatragus antiquus'', the ancient hirola, is an extinct species of alcelaphine antelope that lived in Africa during the Plio-Pleistocene. Discovery ''Beatragus antiquus'' was first described by Louis Leakey in 1965 from material discovered at the Olduvai Gorge (Beds I and II) in Tanzania. Other remains dated slightly earlier have also been found in the Omo valley and possibly at Elandsfontein in South Africa. Description The ancient hirola was larger than the modern day hirola, and the two together may represent a chronospecies. Other differences with the hirola include horn cores diverging immediately from their bases, a lessening of distal divergence, more upright insertions in side view and wider and more convex frontals of the horn cores. Paleoecology It lived in vast savannas alongside other alcelaphine antelopes, such as a small species of ''Damaliscus The genus ''Damaliscus'', commonly known as damalisks, is a genus of antelope in the family Bovidae, subfamily Alc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mammal Genera
There are currently 1,258 genera, 161 families, 27 orders, and around 5,937 recognized living species of mammal. Mammalian taxonomy is in constant flux as many new species are described and recategorized within their respective genera and families. The taxonomy represented here is a compilation of the most logical and up-to-date information on mammalian taxonomy from many sources, the main ones being '' Handbook of the Mammals of the World'' series and '' Mammal Species of the World''. Afrosoricida Suborder Tenrecomorpha *Family Tenrecidae – tenrecs and otter shrews **Subfamily Geogalinae ***Genus '' Geogale'' – long-eared tenrec **Subfamily Oryzorictinae ***Genus '' Microgale'' – shrew tenrecs ***Genus '' Nesogale'' – shrew tenrecs ***Genus '' Oryzorictes'' – rice tenrecs **Subfamily Tenrecinae ***Genus '' Echinops'' – lesser hedgehog tenrec ***Genus '' Hemicentetes'' – streaked tenrec ***Genus '' Setifer'' – greater hedgehog tenrec ***Genus '' Tenrec'' – c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pliocene
The Pliocene ( ; also Pleiocene) is the epoch (geology), epoch in the geologic time scale that extends from 5.33 to 2.58See the 2014 version of the ICS geologic time scale million years ago (Ma). It is the second and most recent epoch of the Neogene Period in the Cenozoic, Cenozoic Era. The Pliocene follows the Miocene Epoch and is followed by the Pleistocene Epoch. Prior to the 2009 revision of the geologic time scale, which placed the four most recent major glaciations entirely within the Pleistocene, the Pliocene also included the Gelasian Stage, which lasted from 2.59 to 1.81 Ma, and is now included in the Pleistocene. As with other older geologic periods, the Stratum, geological strata that define the start and end are well-identified but the exact dates of the start a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Holocene
The Holocene () is the current geologic time scale, geological epoch, beginning approximately 11,700 years ago. It follows the Last Glacial Period, which concluded with the Holocene glacial retreat. The Holocene and the preceding Pleistocene together form the Quaternary period. The Holocene is an interglacial period within the ongoing Ice age, glacial cycles of the Quaternary, and is equivalent to Marine isotope stages, Marine Isotope Stage 1. The Holocene correlates with the last maximum axial tilt towards the Sun of the Earth#Axial tilt and seasons, Earth's obliquity. The Holocene corresponds with the rapid proliferation, growth, and impacts of the human species worldwide, including Recorded history, all of its written history, technological revolutions, development of major civilizations, and overall significant transition towards urban culture, urban living in the present. The human impact on modern-era Earth and its ecosystems may be considered of global significance for th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Philip Sclater
Philip Lutley Sclater (4 November 1829 – 27 June 1913) was an England, English lawyer and zoologist. In zoology, he was an expert ornithologist, and identified the main zoogeographic regions of the world. He was Secretary of the Zoological Society of London for 42 years, from 1860 to 1902. Early life Sclater was born at Tangier Park, in Wootton St Lawrence, Hampshire, where his father William Lutley Sclater had a country house. George Sclater-Booth, 1st Baron Basing was Philip's elder brother. Philip grew up at Hoddington House where he took an early interest in birds. He was educated in school at Twyford and at thirteen went to Winchester College and later Corpus Christi College, Oxford where he studied scientific ornithology under Hugh Edwin Strickland. In 1851, Sclater began to study law and was admitted a Fellow of Corpus Christi College. In 1856 he travelled to America and visited Lake Superior and the upper St. Croix River (Wisconsin–Minnesota), St. Croix River, c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
