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Topic: Monotrematum

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	Obdurodon - Wikipedia, the free encyclopedia
		Monotrematum sudamericanum is now more often held as part of the same genus as Obdurodon.
		It is known only from two lower and one upper platypus teeth.
		The main difference, apart from continent and age, is its size: the teeth of Monotrematum are around twice as large as other similar species.
	en.wikipedia.org /wiki/Monotrematum (578 words)

	BT Research - Platypus (Site not responding. Last check: 2007-10-13)
		Monotrematum sudamericanum, another fossil relative of the platypus has been found in Argentina, indicating that monotremes were present in the supercontinent of Gondwana when the continents of South America and Australia were joined via Antarctica (up to about 167 million years ago).
		Because of the early divergence from the therian mammals and the low numbers of extant monotreme species, it is a frequent subject of research in evolutionary biology.
		Pascual, R., Goin, F.J., Balarino, L., and Udrizar Sauthier, D.E. New data on the Paleocene monotreme Monotrematum sudamericanum, and the convergent evolution of triangulate molars".
	www.breathittteens.com /research.php?title=Platypus (4113 words)

	Monotreme
		The only surviving examples are all indigenous to Australia and New Guinea, though there is evidence that they were once more widespread.
		In 1991, a fossil tooth of a 61-million-year-old platypus was found in southern Argentina, (since named Monotrematum).
		In Australia, the earliest known marsupial fossils date to around 110 million years ago.
	www.ebroadcast.com.au /lookup/encyclopedia/mo/Monotreme.html (630 words)

	47-487EN (Site not responding. Last check: 2007-10-13)
		New data on the Paleocene monotreme Monotrematum sudamericanum, and the convergent evolution of triangulate molars
		Comparisons suggest that the monotreme evolution passed through a stage in which their molars were “pseudo-triangulate”, without a true trigonid, and that the monotreme pseudo-triangulate pattern did not arise through rotation of the primary molar cusps.
		We hypothesize that acquisition of the molar pattern seen in Steropodon galmani (Early Cretaceous, Albian) followed a process similar to that already postulated for docodonts (Docodon in Laurasia, Reigitherium in the South American sector of Gondwana) and, probably, in the gondwanathere Ferugliotherium.
	app.pan.pl /acta47/47-487EN.htm (148 words)

	Monotrematum: Definition and Links by Encyclopedian.com
		...Monotrematum Monotrematum Genus: Monotrematum Pascual R, Archer M, Juareguizar...SJ, 1992 Species: Monotrematum sudamericanum Pascual et al, 1992 Place: Punta Peligro, Patagonia...
		In Australia, the earliest known marsupial fossils date to...
		Post a link to definition / meaning of " Monotrematum " on your site.
	www.encyclopedian.com /mo/Monotrematum.html (263 words)

	The Thylacine Museum - Introducing the Thylacine: About Australia and the Marsupials (page 3)
		In 1991 and 1992, several fossil teeth from a 61 million year old platypus were found at Punta Peligro in southern Argentina.
		Named Monotrematum sudamericanum, the teeth are thought to actually belong to a member of the genus Obdurodon, the remains of which have also been found in Australia.
		Placentals are known from the Tertiary of Australia as well, including some whales and a bat from the Middle Miocene (15 million years ago), and rodents of the family Muridae from the Early Pliocene (4-5 million years ago).
	www.naturalworlds.org /thylacine/introducing/about_marsupials_3.htm (868 words)

	MESOZOIC MAMMALS?; Monotremata, an internet directory:
		If correct, monotremes can't possibly be their immediate relatives or descendants, simply because they're in no way placentals.
		According to Woodburne 2003, (p.220) a new cuspid (NC1) is present on the talonid; 'new' in comparison to Steropodon, which might have had a much smaller precursor of the condition.
		Pascual R, Goin FJ, Balarino L and Udrizar Sauthier DE (2002), New data on the Paleocene monotreme Monotrematum sudamericanum, and the convergent evolution of triangulate molars.
	home.arcor.de /ktdykes/monotrem.htm (15752 words)

	The Evolution of Mesozoic Mammals, a Rough Sketch
		There was no record of their ever having had a broader range.
		This changed in 1992 with the publication of Monotrematum, which turned up in Patagonia.
		Whilst this find was surprising, the presence of platy-ancestors in South America is in line with the geography of the time.
	home.arcor.de /ktdykes/mesomamm.htm (6359 words)

	p98plans
		The low level of speciation throughout the fossil record is another indicator of the uniquely conservative lineage of monotremes.
		Apart from the echidna line, the 150 million years of platypus evolution has produced no species radiation, although the fragmentary skull evidence available for the identification of Monotrematum sudamericanum, has led to its tentative classification as separate taxon (Pascual et al., 1992).
		The classification of the giant echidna, Zaglossus hacketti is uncertain because of the lack of cranial material (Griffiths et al., 1978).
	www.npi.ucla.edu /sleepresearch/Platypus/P98plans.htm (5742 words)

	Creationism & Darwinism, Politics & Economics THREAD III [Free Republic]
		This specimen, dubbed Monotrematum sudamericanum, and is believed to be between 63.2 and 61.8 million years old (Pascual and Jaureguzar, in press as of 1992).
		The echidna split off from the paltypus ca -65M, but the two echidna species diverged only in about -200K, so they are, near enough, equally close.
		This is very, very similar to the platypus, and so likely to be the closest relative.
	www.freerepublic.com /forum/a3b1465710aab.htm (9254 words)

	The Animals And Birds Around Sydney
		One day, we may be able to develop a better way for the blind to "see".
		It is now, but some 61 to 63 million years ago, just after the last of the dinosaurs, there was a small platypus that we call Monotrematum sudamericanum, living in South America.
		We know this from a single fossil tooth, found in Patagonia, and remarkably similar to other material from 15 million years ago at Riversleigh, called Obdurodon, and also to an opalised Cretaceous (110 million years old) monotreme called Steropodon galmani, whose jaw, complete with teeth, was found at Lightning Ridge in the 1980s.
	members.ozemail.com.au /~macinnis/syd/animals.htm (6926 words)

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