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Garganornis
''Garganornis'' (meaning "Gargano bird") is an extinct genus of enormous flightless anatid waterfowl from the Late Miocene of Gargano, Italy. The genus contains one species, ''G. ballmanni'', named by Meijer in 2014. Its enormous size is thought to have been an adaptation to living in exposed, open areas with no terrestrial predators, and as a deterrent to the indigenous aerial predators like the eagle '' Garganoaetus'' and the giant barn owl '' Tyto gigantea''. Description The tibiotarsus of ''Garganornis'' is approximately 30% larger than that of the living mute swan in circumference. Based on comparisons with the latter, it has been estimated that ''Garganornis'' had a weight in the range of , larger than any living anatid. This suggests that it was likely flightless. The preserved carpometacarpi from the wings had quite a short and robust shaft, much shorter than any of the living large-bodied anseriforms that are capable of flight. The carpometacarpus was also peculiarly ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Garganornis Ballmanni (reconstruction By Stefano Maugeri)
''Garganornis'' (meaning "Gargano bird") is an extinct genus of enormous flightless anatid waterfowl from the Late Miocene of Gargano, Italy. The genus contains one species, ''G. ballmanni'', named by Meijer in 2014. Its enormous size is thought to have been an adaptation to living in exposed, open areas with no terrestrial predators, and as a deterrent to the indigenous aerial predators like the eagle ''Garganoaetus'' and the giant barn owl ''Tyto gigantea''. Description The tibiotarsus of ''Garganornis'' is approximately 30% larger than that of the living mute swan in circumference. Based on comparisons with the latter, it has been estimated that ''Garganornis'' had a weight in the range of , larger than any living anatid. This suggests that it was likely flightless. The preserved carpometacarpi from the wings had quite a short and robust shaft, much shorter than any of the living large-bodied anseriforms that are capable of flight. The carpometacarpus was also peculiarly fl ... [...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 "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, ecology, physiology and 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 extinct. A similar size increase, as well as increased woodiness, has been observed in some insular plants. Possible causes Large mammalian carnivores are often absent on isl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Waterfowl
Anseriformes is an order of birds also known as waterfowl that comprises about 180 living species of birds in three families: Anhimidae (three species of screamers), Anseranatidae (the magpie goose), and Anatidae, the largest family, which includes over 170 species of waterfowl, among them the ducks, geese, and swans. Most modern species in the order are highly adapted for an aquatic existence at the water surface. With the exception of screamers, males have penises, a trait that has been lost in the Neoaves. Due to their aquatic nature, most species are web-footed. Evolution Anseriformes are one of only two types of modern bird to be confirmed present during the Mesozoic alongside the other dinosaurs, and in fact were among the very few birds to survive their extinction, along with their cousins the galliformes. These two groups only occupied two ecological niches during the Mesozoic, living in water and on the ground, while the toothed enantiornithes were the dominant bird ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gargano
Gargano (, Gargano Apulian Italo-Romance arˈgæːnə is a historical and geographical sub-region in the province of Foggia, Apulia, southeast Italy, consisting of a wide isolated mountain massif made of highland and several peaks and forming the backbone of the Gargano Promontory projecting into the Adriatic Sea, the "spur" on the Italian "boot". The high point is Monte Calvo at . Most of the upland area, about , is part of the Gargano National Park, founded in 1991. In this region since 1978 a feud has been fought between the clans of the Società foggiana. The Gargano peninsula is partly covered by the remains of an ancient forest, ''Foresta Umbra'', the only remaining part in Italy of the ancient oak and beech forest that once covered much of Central Europe as well as the Apennine deciduous montane forests ecoregion. The Latin poet Horace spoke of the oaks of ''Garganus'' in ''Ode'' II, ix. Tourism The coast of Gargano houses numerous beaches and tourist facilities, inclu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anseriformes
Anseriformes is an order of birds also known as waterfowl that comprises about 180 living species of birds in three families: Anhimidae (three species of screamers), Anseranatidae (the magpie goose), and Anatidae, the largest family, which includes over 170 species of waterfowl, among them the ducks, geese, and swans. Most modern species in the order are highly adapted for an aquatic existence at the water surface. With the exception of screamers, males have penises, a trait that has been lost in the Neoaves. Due to their aquatic nature, most species are web-footed. Evolution Anseriformes are one of only two types of modern bird to be confirmed present during the Mesozoic alongside the other dinosaurs, and in fact were among the very few birds to survive their extinction, along with their cousins the galliformes. These two groups only occupied two ecological niches during the Mesozoic, living in water and on the ground, while the toothed enantiornithes were the dominant bird ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geese
A goose (plural, : geese) is a bird of any of several waterfowl species in the family (biology), family Anatidae. This group comprises the genera ''Anser (bird), Anser'' (the grey geese and white geese) and ''Branta'' (the black geese). Some other birds, mostly related to the shelducks, have "goose" as part of their names. More distantly related members of the family Anatidae are swans, most of which are larger than true geese, and ducks, which are smaller. The term "goose" may refer to either a male or female bird, but when paired with "gander", refers specifically to a female one (the latter referring to a male). Young birds before fledging are called goslings. The List of collective nouns, collective noun for a group of geese on the ground is a gaggle; when in flight, they are called a skein, a team, or a wedge; when flying close together, they are called a plump. Etymology The word "goose" is a direct descendant of,''*ghans-''. In Germanic languages, the root gave Old E ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anatidae
The Anatidae are the biological family of water birds that includes ducks, geese, and swans. The family has a cosmopolitan distribution, occurring on all the world's continents except Antarctica. These birds are adapted for swimming, floating on the water surface, and in some cases diving in at least shallow water. The family contains around 174 species in 43 genera. (The magpie goose is no longer considered to be part of the Anatidae and is now placed in its own family, Anseranatidae.) They are generally herbivorous, and are monogamous breeders. A number of species undertake annual migrations. A few species have been domesticated for agriculture, and many others are hunted for food and recreation. Five species have become extinct since 1600, and many more are threatened with extinction. Description and ecology The ducks, geese, and swans are small- to large-sized birds with a broad and elongated general body plan. Diving species vary from this in being rounder. Extant s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Miocene
The Miocene ( ) is the first geological epoch of the Neogene Period and extends from about (Ma). The Miocene was named by Scottish geologist Charles Lyell; the name comes from the Greek words (', "less") and (', "new") and means "less recent" because it has 18% fewer modern marine invertebrates than the Pliocene has. The Miocene is preceded by the Oligocene and is followed by the Pliocene. As Earth went from the Oligocene through the Miocene and into the Pliocene, the climate slowly cooled towards a series of ice ages. The Miocene boundaries are not marked by a single distinct global event but consist rather of regionally defined boundaries between the warmer Oligocene and the cooler Pliocene Epoch. During the Early Miocene, the Arabian Peninsula collided with Eurasia, severing the connection between the Mediterranean and Indian Ocean, and allowing a faunal interchange to occur between Eurasia and Africa, including the dispersal of proboscideans into Eurasia. During the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cygnus Falconeri
''Cygnus falconeri'', the giant swan, ( Maltese: ) is an extinct, very large swan known from Middle Pleistocene-aged deposits from Malta and Sicily. Its dimensions are described as exceeding those of the living mute swan by one-third, which would give a bill-to-tail length of about (based on 145–160 cm for '' C. olor''.). By comparison to the bones of living swans, it can be estimated that it weighed around and had a wingspan of about . It would have been taller, though not heavier, than the region's dwarf elephants. Due to its size, it may have been flightless. It became extinct before the increase in human activity in the region (see Holocene extinction event), so its disappearance is thought to have resulted from extreme climate fluctuations or the arrival of superior predators and competitors. Its bones are exhibited at Għar Dalam museum in Birżebbuġa Birżebbuġa (; sometimes shortened to B'Buġa) is a seaside town in the Southern Region of Malta, close to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phalanx Bone
The phalanges (singular: ''phalanx'' ) are digital bones in the hands and feet of most vertebrates. In primates, the thumbs and big toes have two phalanges while the other digits have three phalanges. The phalanges are classed as long bones. Structure The phalanges are the bones that make up the fingers of the hand and the toes of the foot. There are 56 phalanges in the human body, with fourteen on each hand and foot. Three phalanges are present on each finger and toe, with the exception of the thumb and large toe, which possess only two. The middle and far phalanges of the fifth toes are often fused together (symphalangism). The phalanges of the hand are commonly known as the finger bones. The phalanges of the foot differ from the hand in that they are often shorter and more compressed, especially in the proximal phalanges, those closest to the torso. A phalanx is named according to whether it is proximal, middle, or distal and its associated finger or toe. The proximal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mikrotia
''Mikrotia'' is an extinct rodent belonging to the Muridae. It lived during the upper Miocene (about 11.63 - 5 million years ago) and its fossil remains have been found in Italy (Gargano). The type species is ''M. magna'', although two other species (''M. maiuscula'' and ''M. parka'') are also known.M. Freudenthal. (1976). Rodent stratigraphy of some Miocene fissure fillings in Gargano (prov. Foggia, Italy). ''Scripta Geologica'' 37:1-23M. Freudenthal. (2006). ''Mikrotia'', ''nomen novum'' for ''Microtia'' Freudenthal 1976 (Mammalia, Rodentia). ''Journal of Vertebrate Paleontology'' 26(3):784 Description This animal, despite belonging to the Muridae, was much larger in size than its modern equivalents. The only known skull of the largest species, ''Mikrotia magna'', was about long. The three known species of the genus ''Mikrotia'' show an evolutionary tendency towards the development of hypsodontal molars (with a high crown) and in the increase of the number of dental lobes in t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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