A species described in 1992 and assigned to a new genus Monotrematum as the type. It is currently the only known species of the genus. The authors compared their fossil material to the genus Obdurodon, ornithorhynchid species first discovered at Australian fossil sites in 1975.
Descriptionedit
Monotrematum sudamericanum is known only from two lower and one upper platypus-like teeth. It is the only known non-Australasianornithorhynchid. The main difference, apart from continent and age, is its size: the teeth of Monotrematum are around twice as large as those of other similar species in the related genus Obdurodon. The teeth of M. sudamericanum presently reside in the collections of Museo de La Plata and Museo Paleontológico Egidio Feruglio, both in Argentina.[2][3][4]
According to Pascual, "The preserved enamel in the central region shows that the crown pattern is almost identical to that of Obdurodon: it is composed of two V-shaped lobes, the anterior of which is wider, separated from the posterior one by a valley that connects the lingual and buccal sides of the crown separating the anterior and posterior lobes."
^R. Pascual, M. Archer, E. O. Jaureguizar, J. L. Prado, H. Godthelp and S. J. Hand. 1992. The first non-Australian monotreme: an early Paleocene South American platypus (Monotremata, Ornithorhynchidae). Platypus and Echidnas. Royal Zoological Society of New South Wales 1-14
^Pascual, R.; Archer, M.; Jaureguizar, E.O.; Prado, J.L.; Godthelp, H.; Hand, S.J. (1992). "First discovery of monotremes in South America". Nature. 356 (6371): 704–706. doi:10.1038/356704a0.
^Pascual, R.; Goin, F.J.; Balarino, L.; Sauthier, D.E.U. (2002). "New data on the Paleocene monotreme Monotrematum sudamericanum, and the convergent evolution of triangulate molars" (PDF). Acta Palaeontologica Polonica. 47 (3): 487–492. Retrieved 2020-01-21.
monotrematum, sudamericanum, extinct, monotreme, species, from, paleocene, peligran, salamanca, formation, patagonia, argentina, only, monotremes, found, outside, oceania, temporal, range, early, paleocene, peligran, preꞒ, artist, restoration, obdurodon, like,. Monotrematum sudamericanum is an extinct monotreme species from the Paleocene Peligran Salamanca Formation in Patagonia Argentina 1 It is one of only two monotremes found outside Oceania MonotrematumTemporal range Early Paleocene Peligran 61 Ma PreꞒ Ꞓ O S D C P T J K Pg N Artist s restoration as an Obdurodon like animalScientific classificationDomain EukaryotaKingdom AnimaliaPhylum ChordataClass MammaliaOrder MonotremataFamily OrnithorhynchidaeGenus MonotrematumPascual et al 1992Species M sudamericanumBinomial name Monotrematum sudamericanumPascual et al 1992 Contents 1 Taxonomy 2 Description 3 References 4 External linksTaxonomy editA species described in 1992 and assigned to a new genus Monotrematum as the type It is currently the only known species of the genus The authors compared their fossil material to the genus Obdurodon ornithorhynchid species first discovered at Australian fossil sites in 1975 Description editMonotrematum sudamericanum is known only from two lower and one upper platypus like teeth It is the only known non Australasian ornithorhynchid The main difference apart from continent and age is its size the teeth of Monotrematum are around twice as large as those of other similar species in the related genus Obdurodon The teeth of M sudamericanum presently reside in the collections of Museo de La Plata and Museo Paleontologico Egidio Feruglio both in Argentina 2 3 4 According to Pascual The preserved enamel in the central region shows that the crown pattern is almost identical to that of Obdurodon it is composed of two V shaped lobes the anterior of which is wider separated from the posterior one by a valley that connects the lingual and buccal sides of the crown separating the anterior and posterior lobes References edit Monotrematum at Fossilworks org R Pascual M Archer E O Jaureguizar J L Prado H Godthelp and S J Hand 1992 The first non Australian monotreme an early Paleocene South American platypus Monotremata Ornithorhynchidae Platypus and Echidnas Royal Zoological Society of New South Wales 1 14 Pascual R Archer M Jaureguizar E O Prado J L Godthelp H Hand S J 1992 First discovery of monotremes in South America Nature 356 6371 704 706 doi 10 1038 356704a0 Pascual R Goin F J Balarino L Sauthier D E U 2002 New data on the Paleocene monotreme Monotrematum sudamericanum and the convergent evolution of triangulate molars PDF Acta Palaeontologica Polonica 47 3 487 492 Retrieved 2020 01 21 External links edit nbsp Paleontology portal nbsp Prehistoric mammals portal nbsp Data related to Monotrematum at Wikispecies Retrieved from https en wikipedia org w index php title Monotrematum amp oldid 1146743057, wikipedia, wiki, book, books, library,
