Halitherium
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Halitherium is a dubious genus of extinct dugongid sea cow that arose in the late Eocene, then became extinct during the early Oligocene. Its fossils are common in European shales. Inside its flippers were finger bones that did not stick out. Halitherium also had the remnants of back legs, which did not show externally. However, it did have a basic femur, joined to a reduced pelvis. Halitherium also had elongated ribs, presumably to increase lung capacity to provide fine control of buoyancy.
Halitherium is a dubious genus of extinct dugongid sea cow that arose in the late Eocene, then became extinct during the early Oligocene. Its fossils are common in European shales. Inside its flippers were finger bones that did not stick out. Halitherium also had the remnants of back legs, which did not show externally. However, it did have a basic femur, joined to a reduced pelvis. Halitherium also had elongated ribs, presumably to increase lung capacity to provide fine control of buoyancy. ===Formerly assigned species=== Halitherium antillense Matthew, 1916; nomen dubium Halitherium christolii Fitzinger, 1842 = Lentiarenium Halitherium bellunense de Zigno, 1875 = Italosiren Halitherium taulannense Sange, 2001; distinct, unnamed genus Halitherium olseni Rinehart, 1976 = Crenatosiren Halitherium alleni Sampson, 1932; distinct genus
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