{{Short description|Extinct genus of mammal}} {{Automatic taxobox | fossil_range = {{fossil range|Early Miocene|Late Miocene}} | image = Dioplotherium manigualti FLMNH.jpg | image_caption = Skull of ''D. manigaulti'', Florida Museum of Natural History | taxon = Dioplotherium | authority = Cope, 1883 | subdivision_ranks = Species | subdivision = *''D. allisoni'' <small>Kilmer, 1965</small> *''D. manigaulti'' <small> Cope, 1883 (type)</small> }}
'''''Dioplotherium''''' is an extinct genus of sirenian related to the dugongs, known from Neogene-aged deposits from southern North America.<ref>E. D. Cope. 1883. On a new extinct genus of Sirenia, from South Carolina. ''Proceedings of the Academy of Natural Sciences of Philadelphia'' '''1883''':52-54</ref>
==Species== *''Dioplotherium allisoni'', described as ''Halianassa allisoni'' by Kilmer in 1965 from remains found in the middle Miocene Isidro Formation of Baja California, Mexico, and known from marine deposits in Baja California and California.<ref>F. H. Kilmer. 1965. A Miocene dugongid from Baja California, Mexico. ''Bulletin of the Southern California Academy of Sciences'' '''65'''(2):57-74.</ref> The species was referred to ''Dioplotherium'' by Domning in 1989.<ref name=jvp1989/>{{Rp|pp=417–418}}<ref>D. P. Domning. 1996. Bibliography and Index of the Sirenia and Desmostylia. ''Smithsonian Contributions to Paleobiology'' '''80''':1-611 {{doi|10.5479/si.00810266.80.1}}</ref>left|thumb|Life restoration of ''D. manigaulti''
*''Dioplotherium manigaulti'', was described by Edward Drinker Cope in 1883 on the basis of a partial premaxilla with a tusk found near Charleston, South Carolina. Nothing more was known of the species until a nearly complete skull was found in the Suwannee River by Gary S. Morgan in 1985. Additional fossils ascribed to ''D. manigaulti'' have been found in the Charleston Phosphate Beds and Ashley River phosphate deposits in South Carolina, and in exposures of the Hawthorn Group in Jackson County, Florida.<ref name=jvp1989>Domning, Daryl P. 1989. Fossil Sirenia of the West Atlantic and Caribbean Region. II. Dioplotherium manigaulti Cope, 1883. ''Journal of Vertebrate Paleontology'' '''9'''(4):415-428. {{JSTOR|4523282}}</ref>{{Rp|pp=415, 417–418}}
==References== {{Reflist}}
{{Sirenian genera}} {{Taxonbar|from=Q676188}} Category:Dugongidae Category:Miocene sirenians Category:Fossil taxa described in 1883 Category:Prehistoric placental genera
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