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Topic: Steropodon galmani

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	Steropodon - Wikipedia, the free encyclopedia
		Steropodon galmani was a prehistoric species of monotreme, or egg-laying mammal, that lived during the middle Albian stage, in the Lower Cretaceous period.
		It is the earliest known relative of the Platypus.
		Steropodon is known only from a single opalised jaw with three molars, discovered at the Griman Creek Formation, Lightning Ridge, New South Wales, Australia.
	en.wikipedia.org /wiki/Steropodon (254 words)

	Australia's Lost Kingdoms - Steropodon
		Fossils: An opalised jaw of Steropodon was found at Lightning Ridge in New South Wales.
		Steropodon was named in 1985 and is regarded as one of Australia's most important fossil discoveries.
		Did you know?: Steropodon was almost as big as some of the small dinosaurs it lived alongside at Lightning Ridge.
	www.lostkingdoms.com /facts/factsheet8.htm (133 words)

	Fossil sites of Australia - Lightning Ridge
		Steropodon, for example, was one of the ancestors of the modern Platypus and echidnas of Australia and New Guinea.
		The Cretaceous monotremes were probably similar in size and shape to the modern platypus, although in modern monotremes the well-developed teeth of the fossil forms are absent.
		Steropodon galmani may have used electroreceptors in its snout to hunt crustaceans in a similar manner to the modern platypus.
	www.amonline.net.au /fossil_sites/lightning.htm (621 words)

	ABC Science - Australian Beasts - Fact files - Steropodon (Steropodon galmani)
		Steropodon was a platypus-like mammal that lived alongside the dinosaurs.
		An opalised jaw of Steropodon was found at Lightning Ridge in New South Wales.
		Steropodon was almost as big as some of the small dinosaurs it lived alongside at Lightning Ridge.
	www.abc.net.au /science/ausbeasts/factfiles/steropodon.htm (140 words)

	Australia's Lost Kingdoms - Early Cretaceous period - Animals
		Steropodon is a monotreme, like the Platypus and echidnas.
		The name Steropodon means 'Lightning tooth' and refers to the flash of colour in this opalised fossil.
		Although its diet is a mystery, it might have used its strange teeth to break the hard shells of molluscs.
	www.lostkingdoms.com /snapshots/cretaceous_early_mammals.htm (315 words)

	Non-reptilian life in Mesozoic Australia (Site not responding. Last check: 2007-10-12)
		The first Mesozoic mammal found in Australia was a monotreme (egg-laying mammal) dubbed Steropodon galmani, meaning "flash of lightning tooth".
		Once the single tooth of the specimen (a lower jaw) had been fully prepared, it turned out to be more similar to Steropodon than to the primitive eupantotheres, indicating that it was another monotreme.
		The lower jaw is only about one fifth the size of that of Steropodon, indicating a very small monotreme indeed (probably less than 10 cm, or 4 inches, long).
	www.bonus.com /contour/danns_dinosaurs/http@@/www.geocities.com/dannsdinosaurs/non-rept.html (2620 words)

	Re: LATE SURVIVING CYNODONT (lenghty and boring)
		Steropodon galmani is a Cretaceous monotreme from Australia.
		It appears to have had less specialised teeth than the Cainozoic extinct platypi (of which there are two Australian species besides the South American one) Though only known from an incomplete jaw, Steropodon doesn't appear to have sported a platypus like bill.
		Also known from the Cretaceous of Australia is the monotreme, Kollikodon (informally "Hotcrossbunodon") which has really freaky teeth that appear to be designed for crushing hard food items.
	dml.cmnh.org /1997Jun/msg00509.html (419 words)

	Creationism and the Platypus
		In 1984, an opalised jaw fragment with three teeth in place, belonging to either a platypus or a platypus-like monotreme, was discovered at Lightning Ridge in New South Wales.
		It was the first known mammal from the Mesozoic (the Age of Dinosaurs) in Australia.
		Steropodon, at 110 million years, is far older than any modern types of mammals.
	www.talkorigins.org /faqs/platypus.html (2239 words)

	Monotreme - Wikipedia, the free encyclopedia
		Fossils of a jaw fragment 110 million years old were found at Lightning Ridge, New South Wales.
		These fragments, from species Steropodon galmani, are the oldest known fossils of monotremes.
		Fossils from the genera Kollikodon, Teinolophos, and Obdurodon have also been discovered.
	en.wikipedia.org /wiki/Monotreme (750 words)

	MESOZOIC MAMMALS?; Monotremata, an internet directory:
		Musser and Archer, 1998 state that a large canal on the mandible would be consistent with the presence of a beak, as with Steropodon, (p.1075).
		The lower molar is broadly similar in morphology to the m2 of Steropodon.
		Earlier on the same page is: "Accordingly, the pseudo-triangular molar pattern of Steropodon galmani is, in our view, most plausibly derived from the linear, tricuspate pattern, as seen in Morganucodon, which is universally accepted as ancestral for the Mammalia." To Pascual and Co then, monotremes must've evolved from something with some Morganucodon-like gnashers.
	home.arcor.de /ktdykes/monotrem.htm (15752 words)

	Re: ... vs energy deficient gigantothermy (boo hiss) (Site not responding. Last check: 2007-10-12)
		The biggest known mammal of all first > >165 or so million years of mammal history was the 1 m long platypus > *>Steropodon** galmani*.
		> > _Didelphodon vorax_ Marsh 1889, a bader-sized metatherian from the Hell > Creek Formation of Montana, was at least as large as _Steropodon galmani_ > (and similar-sized monotremes of SE Australia).
		A typical case of an answer that multiplies the questions...
	dml.cmnh.org /2001May/msg00153.html (126 words)

	Ecology of the Xenarthra (Site not responding. Last check: 2007-10-12)
		The oldest fossil monotremes come from the Lightning Ridge opal fields of New South Wales, Australia.
		An opalized lower jaw fragment of Steropodon galmani more than 100 million years old (middle Albian, Cretaceous) was found containing three distinctive teeth remarkably similar to those of the juvenile platypus.
		From the size of the jaw, it is estimated that the living animal was about the size of a cat, making it one of the largest Mesozoic mammals known.
	www.ucmp.berkeley.edu /mammal/xenarthra/xenarthralh.html (241 words)

	MESOZOIC MAMMALS; SHUOTHERIIDAE & AUSTRALOSPHENIDA, an internet directory:
		Those are some of the features which led these authors to conclude, (p.54): "These australosphenidans occupy their own morphospace and are distinct from the stem taxa of boreosphenidans, metatherians and eutherians.
		Steropodon (Monotremata) does not have an internal groove on the mandible.
		In contrast to the condition known from other australosphenidans, (Ambondro, Ausktribosphenos, Steropodon), this feature is weakly developed and doesn't wrap around the mesial side.
	home.arcor.de /ktdykes/australo.htm (8334 words)

	Bye Bye Darwin (Thread IX) [Free Republic] (Site not responding. Last check: 2007-10-12)
		That was very good research and saw a drawing of the Steropodon Galmani which looked a lot like the platypus indeed.
		You as a layman need these quite obvious characteristics but a person who has more insight into the matter detects correlations in other more subtle features as well (that's why they only needed a jawbone of the Steropodon Galmani, though I'm damn shure they'd be extremely happy if they find an entire fossil).
		This is not the case with the Steropodon, but it was with many of the examples given of other animals the same age.
	www.freerepublic.com /forum/a3b3049e503e9.htm (8460 words)

	Transitional Vertebrate Fossils FAQ: Part 1B
		By the Middle Cretaceous, animals with the new tribosphenic molar had spread into North America too (North America was still connected to Europe.)
		Steropodon galmani (early Cretaceous) -- The first known definite monotreme, discovered in 1985.
		Vincelestes neuquenianus (early Cretaceous, 135 Ma) -- A probably-placental mammal with some marsupial traits, known from some nice skulls.
	www.talkorigins.org /faqs/faq-transitional/part1b.html (4884 words)

	p98plans
		The monotremes have shown a remarkably conservative evolutionary course since their divergence from the rest of the mammalian line.
		For example, fossil teeth from Steropodon galmani dated at 110 million years ago show many similarities to the vestigial teeth of the current day platypus, Ornithorhyncus anatinus (Archer et al., 1985).
		Analyses of fossilized skull remains indicate remarkably little change in platypus morphology over at least 60 million years (Archer et al., 1992; Pascual et al., 1992).
	www.npi.ucla.edu /sleepresearch/Platypus/P98plans.htm (5742 words)

	Theres something wierd about a duckbillplatypus? - Unexplained Mysteries Discussion Forums (Site not responding. Last check: 2007-10-12)
		I made a spelling mistake and sold my soul to santa.
		"Based on a fragment of lower jaw found in opal deposits at Lightning Ridge in New South Wales, a type of ancestral platypus (Steropodon galmani) 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, see below) was discovered in the Patagonian desert of Argentina.
	www.unexplained-mysteries.com /forum/index.php?showtopic=24549&mode=linearplus (1213 words)

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