Metaxytherium floridanum Hay 1922 (dugong)

Mammalia - Sirenia - Dugongidae

Alternative combination: Felsinotherium floridanum

Synonyms: Felsinotherium ossivallense Simpson 1932, Halitherium antiquum Leidy 1856, Halitherium antiquusm Leidy 1856, Ischyrosaurus antiquus Leidy 1856, Ischyrotherium antiquum Leidy 1856, Ischyrotherium antiquus Leidy 1856, Manatus antiquus Leidy 1856, Metaxytherium ossivalense Simpson 1932, Metaxytherium ossivallense Simpson 1932, Trichechus antiquus Leidy 1856

Full reference: O. P. Hay. 1922. Description of a new fossil sea cow from Florida, Metaxytherium floridanum. Proceedings of the United States National Museum 61(17):1-4

Belongs to Metaxytherium according to M. Voss 2014

See also Cope 1869, Domning 1988, Domning 1994, Domning 1996, Domning 2008, Domning 2018, Fondi and Pacini 1974, Hay 1902, Hay 1930, Leidy 1856, Leidy 1856, Leidy 1857, Leidy 1860, Leidy 1860, Leidy 1877, Reinhart 1976, Sherman 1952, Simpson 1932, Trouessart 1898 and Trouessart 1904

Sister taxa: Felsinotherium gunteri, Metaxytherium albifontanum, Metaxytherium aquitaniae, Metaxytherium arctodites, Metaxytherium beaumontii, Metaxytherium crataegense, Metaxytherium krahuletzi, Metaxytherium lovisati, Metaxytherium medium, Metaxytherium meyeri, Metaxytherium riveroi, Metaxytherium serresii, Metaxytherium subapenninum

Type specimens:

  • Metaxytherium floridanum: USNM 7221, a maxilla. Its type locality is Prairie Pebble Phosphate Co., which is in a Serravallian lagoonal sandstone in the Peace River Formation of Florida.
  • Felsinotherium ossivallense: AMNH 26805.
  • Manatus antiquus: Its type locality is between Moreau and Grand Rivers (USGS), which is in a Maastrichtian terrestrial horizon in the Lance Formation of South Dakota.

Ecology: aquatic herbivore

Distribution:

• Hemphillian of United States (2: Florida collections)

• Miocene of United States (8: Florida, Virginia)

Total: 10 collections each including a single occurrence

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Specimen images are retrieved through the ePANDDA API.


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