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Rhoetosaurus
''Rhoetosaurus'' (meaning "Rhoetos lizard"), named after Rhoetus, a titan in Greek Mythology, is a genus of sauropod dinosaur from the Jurassic (?Middle Jurassic) of what is now eastern Australia. ''Rhoetosaurus'' is estimated to have been about 12–15 metres long. Subsequent authors have sometimes misspelled the name: ''Rhaetosaurus'' (de Lapparent & Laverat, 1955); ''Rheteosaurus'' (Yadagiri, Prasad & Satsangi, 1979).
==Discovery and species==
In 1924, Heber Longman, self-trained paleontologist at (and later director of) the Queensland Museum in Brisbane, learned of a large fossil reptile skeleton exposed at the Durham Downs Station near Roma in central Queensland. The station manager, Arthur Browne, forwarded fragments of bone to Longman, and was honoured with the dinosaur's specific name ''brownei''.
The initial collection was of 22 tail vertebrae, including a series of 16 consecutive bones, and other fragmentary hindlimb pieces. Soon after Longman announced the new discovery, he visited the station and arranged for more material of the same skeleton to be sent to the Queensland Museum. These included additional vertebrae from the thoracic area, bits of rib, more caudals and more of the femur and pelvis as well as a cervical vertebra. Further material was collected by Mary Wade and Alan Bartholomai in 1975, and still more by Drs. Tom Rich, Anne Warren, Zhao Xijin, and Ralph Molnar. By 2012, prepared material comprised 40 vertebrae, five partial thoracic ribs, part of the sacrum, fragments of the ilia, an ischium, the left and right pubic bones, and much of the right hind limb (femur, tibia, fibula, astragalus, and pes). More bones are yet to be removed from rock.
''Rhoetosaurus'' is among the best-known sauropods thus far discovered in Australia, as well as for the Jurassic of Gondwana.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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