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†subfamily Ortotheriinae Ameghino 1889 (edentate)

Mammalia - Xenarthra - Megalonychidae

Parent taxon: Megalonychidae according to G. J. Scillato-Yané 1980

Sister taxa: Acratocnus, Ahytherium, Amphihapalops, Amphiocnus, Analcimorphus, Australonyx, Choloepus, Deseadognathus, Diabolotherium, Diheterocnus, Eugeronops, Geronops, Hyperleptus, Mecorhinus, Megalocninae, Megalocnus, Megalonychinae, Megalonychops, Megalonychotherium, Megalonyx, Megistonyx, Meizonyx, Mesocnus, Metopotherinae, Metopotherini, Microcnus, Miocnus, Nothropus, Ocnopodinae, Ortotherium, Paranabradys, Paraplanops, Pattersonocnus, Pliometanastes, Pliomorphus, Protomegalonyx, Pseudhapalops, Torcellia, Trematherium, Urumacocnus, Zacatzontli, Bradypodina

Subtaxa: Paulocnus

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Ecology: ground dwelling herbivore

Distribution: found only at Paulocnus locality (Pliocene of Netherlands Antilles)

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