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Maps are also available as part of the Wikimedia Atlas of the World project in the Atlas of China. Pages in category "Maps of China" The following 7 pages are in this category, out of 7 total.
The Yu Ji Tu, or Map of the Tracks of Yu Gong, carved into stone in 1137, [1] located in the Stele Forest of Xi'an, Shaanxi, China. This 3 ft (0.91 m) squared map features a graduated scale of 100 li for each rectangular grid. China's coastline and river systems are clearly defined and precisely pinpointed on the map.
A notable member is the arapaima (Arapaima gigas), the largest freshwater fish in South America and one of the largest bony fishes alive. Other notable members include the bizarre freshwater elephantfishes of family Mormyridae.
Both its major subgroups are successful today: Actinopterygii includes most extant bony fish species, and Sarcopterygii includes the tetrapods. Euteleostomes originally all had an endochondral bone, fins with lepidotrichs (fin rays), jaws lined by maxillary, premaxillary, and dentary bones composed of dermal bone, and lungs.
[25] [26] The beluga sturgeon is the largest species of freshwater bony fish extant today, and Arapaima gigas is among the largest of the freshwater fish. The largest bony fish ever was Leedsichthys, which dwarfed the beluga sturgeon as well as the ocean sunfish, giant grouper and all the other giant bony fishes alive today. [27]
Fish portal; Holostei is a group of ray-finned bony fish.It is divided into two major clades, the Halecomorphi, represented by the single living genus, Amia with two species, the bowfins (Amia calva and Amia ocellicauda), as well as the Ginglymodi, the sole living representatives being the gars (Lepisosteidae), represented by seven living species in two genera (Atractosteus, Lepisosteus). [3]
The cladogram below shows the evolutionary relationships of the teleosts to other extant clades of bony fish, [15] and to the four-limbed vertebrates that evolved from a related group of bony fish during the Devonian period. [17] [18] Approximate divergence dates (in millions of years, mya) are from Near et al., 2012. [15]
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