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Topic: Obdurodon sudamericanum

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Obdurodon dicksoni

Obdurodon

	Obdurodon - Wikipedia, the free encyclopedia
		Obdurodon differed from modern platypi in that it still had teeth (except for juveniles, the modern platypus does not have teeth).
		Obdurodon dicksoni is known from a single skull found at Riversleigh, Australia.
		Obdurodon insignis is known from some teeth and fragments of jaw and pelvis found at the Tirari Desert, South Australia.
	en.wikipedia.org /wiki/Obdurodon (194 words)

	CONK! Encyclopedia: Monotreme (Site not responding. Last check: 2007-10-17)
		Fossils from the genera Kollikodon, Teinolophos, and Obdurodon have also been discovered.
		In 1991, a fossil tooth of a 61-million-year-old platypus was found in southern Argentina (since named Monotrematum, though it is now considered to be an Obdurodon species).
		May be part of Ornithorhynchidae; closely related to modern platypus.
	www.conk.com /search/encyclopedia.cgi?q=Monotreme (767 words)

	Evolution, paleontology, and classification (from platypus) -- Britannica Concise Encyclopedia - The online ...
		Until recently this Cretaceous monotreme (Steropodon galmani, known by a stunning opalized jaw) was placed within the platypus family, but, partly on the basis of molecular studies and partly on dental structure, it is now classified in its own family, Steropodontidae.
		sudamericanum in 62 million-year-old Patagonian sediments confirmed that platypuses were once distributed through the southern continents that were once linked geographically (Gondwanaland).
		Species of Monotrematum and Obdurodon, which retained functional teeth, were generally larger and more robust than the living platypus.
	www.britannica.com /ebc/article-218680 (1142 words)

	Australia's Lost Kingdoms - Riversleigh publications
		A new Mesozoic monotreme from Australia and the relationships of Monotrematum sudamericanum.
		New information about the skull and dentary of the Miocene platypus Obdurodon dicksoni, and a discussion of ornithorhynchid relationships.
		The use of fossils to clarify long-term survival trends.
	www.lostkingdoms.com /facts/publications.htm (1205 words)

	Creationism and the Platypus
		The modern platypus has only vestigial teeth which are replaced by horny pads when it is still a juvenile.
		Not true; there are other differences between the modern platypus and the skull of Obdurodon dicksoni than size.
		Description of the skull and non-vestigial dentition of a miocene platypus (Obdurodon dicksoni n.
	www.talkorigins.org /faqs/platypus.html (2239 words)

	MESOZOIC MAMMALS?; Monotremata, an internet directory:
		Teeth and fragments of jaw and pelvis are known.
		In Obdurodon dicksoni, it's particularly large, and this reflects the presence of a hypertrophied beak.
		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 (13162 words)

	Monotreme -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-10-17)
		In 1991, a fossil tooth of a 61-million-year-old platypus was found in southern (A republic in southern South America; second largest country in South America) Argentina (since named Monotrematum, though it is now considered to be an Obdurodon species).
		Species (Click link for more info and facts about Ornithorhyncus anatinus) Ornithorhyncus anatinus ((Small densely furred aquatic monotreme of Australia and Tasmania having a broad bill and tail and webbed feet; only species in the family Ornithorhynchidae) Platypus).
		Includes a number of (From 25 million to 13 million years ago; appearance of grazing mammals) Miocene (5-24 million years ago) Platypi.
	www.absoluteastronomy.com /encyclopedia/M/Mo/Monotreme.htm (1036 words)

	AusEmade: Platypus, Australia
		Fossil records based on a fragment of lower jaw found in opal deposits at Lightning Ridge, New South Wales, describe a type of ancestral platypus (Steropodon galmani) that existed alongside the dinosaurs about 110 million years ago.
		In 1991, a fossil tooth belonging to a different kind of ancient platypus (originally described as Monotrematum sudamericanum but now probably regarded as another Obdurodon species) was discovered in the Patagonian desert of Argentina.
		The tooth was found in sediments deposited over 60 million years ago, at the time when Australia and South America were still joined as part of the southern supercontinent Gondwana.
	www.ausemade.com.au /fauna-flora/fauna/platypus/platypus.htm (1020 words)

	Monotremata (Site not responding. Last check: 2007-10-17)
		Thesefragments, from species Steropodon galmani, are the oldest known fossils of monotremes.
		Fossils from the generaKollikodon, Teinolophos, and Obdurodon have also been discovered.
		In 1991, a fossil tooth of a 61-million- year-old platypus was found in southern Argentina (since named Monotrematum, though it is now considered to be an Obdurodon species).(See fossil monotremes below.)
	www.therfcc.org /bbs1/messages/monotremata-88776.html (735 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)

	Platypus saves creation! - FileFront Forums
		This was followed in 1985 by a spectacular find: an almost complete skull of a fossil platypus about 15 to 20 million years old.
		This has been named Obdurodon dicksoni (Archer, Jenkins, Hand, Murray, and Godthelp.
		Its skull is more generalized, and about 25% longer, than that of the modern platypus.
	forums.filefront.com /showthread.php?t=140709 (3462 words)

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