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Hypnomys
''Hypnomys'', otherwise known as Balearic giant dormice, is an extinct genus of dormouse (Gliridae) in the subfamily Leithiinae. Its species are considered examples of insular gigantism. They were endemic to the Balearic Islands in the western Mediterranean from the Early Pliocene until their extinction around 4,000 years ago. They first appeared in the fossil record on Mallorca during the Early Pliocene, presumably due to the Messinian salinity crisis causing a connection with mainland Europe. They later spread to Menorca, and a possible molar is also known from Ibiza. ''Hypnomys'' became extinct during the Holocene after human arrival on the Balearics. They were one of only three native land mammals to the islands at the time of human arrival, alongside the shrew ''Nesiotites'' and goat-antelope ''Myotragus''. History of discovery The first remains of ''Hypnomys'' were discovered in 1910 on the island of Mallorca in the Balearic Islands by British palaeontologist Dorothea Bate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dormouse
A dormouse is a rodent of the family Gliridae (this family is also variously called Myoxidae or Muscardinidae by different taxonomists). Dormice are nocturnal animals found in Africa, Asia, and Europe. They are named for their long, dormant hibernation period of six months or longer. As only one species of dormouse – the hazel dormouse – is native to the United Kingdom, in everyday English usage "dormouse" can refer either to that one species or to the family as a whole. The English name of the species derived from the French ''dormeuse'', and the latter in turn possibly from the Languedocien ''radourmeire''. Etymology Concerning the dormouse's name, etymonline says "long-tailed Old World rodent noted for its state of semi-hibernation in winter, early 15c., possibly from Anglo-French ''dormouse'' 'tending to be dormant' (from stem of ''dormir'' 'to sleep,' see ''dormant''), with the second element mistaken for ''mouse''; or perhaps it is from a Middle English dialectal c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leithiinae
Leithiinae is a subfamily of dormice. It is named after the '' Leithia'', an extinct genus of giant dormouse from the Pleistocene of Sicily. Classification Subfamily Leithiinae *Genus '' Chaetocauda'' **Chinese dormouse, ''Chaetocauda sichuanensis'' *Genus ''Dryomys'' ** Woolly dormouse, ''Dryomys laniger'' ** Balochistan forest dormouse, ''Dryomys niethammeri'' **Forest dormouse The forest dormouse (''Dryomys nitedula'') is a species of rodent in the family Gliridae found in eastern Europe, the Balkans and parts of western Central Asia. It is categorized as being of least concern in the ''IUCN List of Threatened Specie ..., ''Dryomys nitedula'' *Genus '' Eliomys'', garden dormice ** Asian garden dormouse, ''Eliomys melanurus'' ** Maghreb garden dormouse, ''Eliomys munbyanus'' ** Garden dormouse, ''Eliomys quercinus'' *Genus '' Hypnomys''† (Balearic dormouse) **'' Hypnomys morphaeus''† **'' Hypnomys mahonensis''† *Genus '' Leithia''† *Genus '' Muscardinus'' ** Hazel d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Island Gigantism
Island gigantism, or insular gigantism, is a biological phenomenon in which the size of an animal species isolated on an island increases dramatically in comparison to its mainland relatives. Island gigantism is one aspect of the more general Foster's rule, "island effect" or "Foster's rule", which posits that when mainland animals colonize islands, small species tend to evolve larger bodies, and large species tend to evolve smaller bodies (insular dwarfism). This is itself one aspect of the more general phenomenon of island syndrome which describes the differences in Morphology (biology), morphology, ecology, physiology and ethology, behaviour of insular species compared to their continental counterparts. Following the arrival of humans and associated introduced predators (dogs, cats, rats, pigs), many giant as well as other island endemics have become Extinction, extinct. A similar size increase, as well as increased woodiness, has been observed in some insular plants. Possible ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Myotragus
''Myotragus'' (Neo-Latin, derived from the Greek: , and "Balearian mouse-goat"), is an extinct genus of goat-antelope in the tribe Caprini which lived on the Balearic Islands of Mallorca and Menorca in the western Mediterranean until its extinction around 4,500 years ago. The fossil record of ''Myotragus'' on the Balearic Islands extends over 5 million years back to the early Pliocene on Mallorca, where it presumably arrived after the major sea level drop during the Messinian Salinity Crisis. ''Myotragus'' is represented by a sequence of six sequential chronospecies representing a gradual change in morphology''.'' The youngest and best known species, ''M. balearicus,'' is noted for a number of unusual morphological adaptions, including forward facing eyes suggestive of binocular vision, and a reptilian-like physiology. Early genetic research suggested that it was closely related to sheep of the genus '' Ovis'', however more recent research has indicated that its closest living r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Balearic Islands
The Balearic Islands ( es, Islas Baleares ; or ca, Illes Balears ) are an archipelago in the Balearic Sea, near the eastern coast of the Iberian Peninsula. The archipelago is an autonomous community and a province of Spain; its capital is Palma. The 2007 Statute of Autonomy designates the Balearic Islands as one of the '' nationalities'' of Spain. The official languages of the Balearic Islands are Catalan and Spanish. Its four largest islands are Mallorca, Menorca, Ibiza, and Formentera. Many of its minor islands and islets are close to the larger islands, including Cabrera, Dragonera, and S'Espalmador. The islands have a Mediterranean climate, and the four major islands are all popular tourist destinations. Ibiza, in particular, is known as an international party destination, attracting many of the world's most popular DJs to its nightclubs. The islands' culture and cuisine are similar to those of the rest of Spain but have their own distinctive features. Etymolo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leithia
''Leithia'' is a genus of extinct giant dormice from the Mediterranean islands of Malta and Sicily. It is considered an example of island gigantism. ''Leithia melitensis'' is the largest known species of dormouse, living or extinct, being twice the size of any other known species. Discovery and taxonomy The species were first named by Andrew Leith Adams in 1863 from remains found in caves in Malta and were assigned to the living genus '' Myoxus.''Adams, A. L. (1863), ‘Observations on the Fossiliferous caves of Malta’. ''Journal of the Royal Society,'' 4 .2. pp.11–19. ''Leithia'' was proposed in 1896 by Richard Lydekker as a new genus, suggesting an arrangement currently recognised as the subfamily Leithiinae; the names honour Leith Adams. It is estimated to have weighed up to . In the time before the Mediterranean islands were colonised by humans, dozens of mammal species endemic to the area, some unusually large like ''Leithia'', some unusually small (such as pyg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mallorca
Mallorca, or Majorca, is the largest island in the Balearic Islands, which are part of Spain and located in the Mediterranean. The capital of the island, Palma, is also the capital of the autonomous community of the Balearic Islands. The Balearic Islands have been an autonomous region of Spain since 1983. There are two small islands off the coast of Mallorca: Cabrera (southeast of Palma) and Dragonera (west of Palma). The anthem of Mallorca is "La Balanguera". Like the other Balearic Islands of Menorca, Ibiza, and Formentera, the island is an extremely popular holiday destination, particularly for tourists from the Netherlands, Germany and the United Kingdom. The international airport, Palma de Mallorca Airport, is one of the busiest in Spain; it was used by 28 million passengers in 2017, with use increasing every year since 2012. Etymology The name derives from Classical Latin ''insula maior'', "larger island". Later, in Medieval Latin, this became ''Maiorca'', "the lar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dorothea Bate
Dorothea Minola Alice Bate FGS (8 November 1878 – 13 January 1951), also known as Dorothy Bate, was a Welsh palaeontologist and pioneer of archaeozoology. Her life's work was to find fossils of recently extinct mammals with a view to understanding how and why giant and dwarf forms evolved. Early and family life Born at Napier House, Carmarthen, Carmarthenshire, Bate was the daughter of Police Superintendent Henry Reginald Bate (born in Co. Wexford, Ireland) and his wife Elizabeth Fraser Whitehill. She had an older sister and a younger brother.Bate, Dorothea Minola Alice (1878–1951), palaeontologist by Karolyn Shindler in |
Messinian Salinity Crisis
The Messinian salinity crisis (MSC), also referred to as the Messinian event, and in its latest stage as the Lago Mare event, was a geological event during which the Mediterranean Sea went into a cycle of partial or nearly complete desiccation (drying-up) throughout the latter part of the Messinian age of the Miocene epoch, from 5.96 to 5.33 Ma (million years ago). It ended with the Zanclean flood, when the Atlantic reclaimed the basin. Sediment samples from below the deep seafloor of the Mediterranean Sea, which include evaporite minerals, soils, and fossil plants, show that the precursor of the Strait of Gibraltar closed tight about 5.96 million years ago, sealing the Mediterranean off from the Atlantic. This resulted in a period of partial desiccation of the Mediterranean Sea, the first of several such periods during the late Miocene. After the strait closed for the last time around 5.6 Ma, the region's generally dry climate at the time dried the Mediterranean basin out ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Strait Of Gibraltar
The Strait of Gibraltar ( ar, مضيق جبل طارق, Maḍīq Jabal Ṭāriq; es, Estrecho de Gibraltar, Archaic: Pillars of Hercules), also known as the Straits of Gibraltar, is a narrow strait that connects the Atlantic Ocean to the Mediterranean Sea and separates the Iberian Peninsula in Europe from Morocco in Africa. The two continents are separated by of ocean at the Strait's narrowest point between Point Marroquí in Spain and Point Cires in Morocco. Ferries cross between the two continents every day in as little as 35 minutes. The Strait's depth ranges between which possibly interacted with the lower mean sea level of the last major glaciation 20,000 years ago when the level of the sea is believed to have been lower by . The strait lies in the territorial waters of Morocco, Spain, and the British overseas territory of Gibraltar. Under the United Nations Convention on the Law of the Sea, foreign vessels and aircraft have the freedom of navigation and overflight to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marine Regression
A marine regression is a geological process occurring when areas of submerged seafloor are exposed above the sea level. The opposite event, marine transgression, occurs when flooding from the sea covers previously-exposed land. Evidence of marine regressions and transgressions occurs throughout the fossil record, and the fluctuations are thought to have caused or contributed to several mass extinctions, such as the Permian-Triassic extinction event (250 million years ago) and Cretaceous–Paleogene extinction event (66 Ma). During the Permian-Triassic extinction, the largest extinction event in the Earth's history, the global sea level fell 250 m (820 ft). A major regression could itself cause marine organisms in shallow seas to go extinct, but mass extinctions tend to involve both terrestrial and aquatic species, and it is harder to see how a marine regression could cause widespread extinctions of land animals. Regressions are, therefore, seen as correlates or symptoms of maj ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Biological Dispersal
Biological dispersal refers to both the movement of individuals (animals, plants, fungi, bacteria, etc.) from their birth site to their breeding site ('natal dispersal'), as well as the movement from one breeding site to another ('breeding dispersal'). Dispersal is also used to describe the movement of propagules such as seeds and spores. Technically, dispersal is defined as any movement that has the potential to lead to gene flow. The act of dispersal involves three phases: departure, transfer, settlement and there are different fitness costs and benefits associated with each of these phases. Through simply moving from one habitat patch to another, the dispersal of an individual has consequences not only for individual fitness, but also for population dynamics, population genetics, and species distribution. Understanding dispersal and the consequences both for evolutionary strategies at a species level, and for processes at an ecosystem level, requires understanding on the t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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