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Topic: Eomaia

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	Scientists report human ancestor discovery - Pittsburgh Tribune-Review
		The eomaia fossil is about 15 million years older than the next oldest-known placental mammal, said Luo, the associate curator of vertebrate paleontology at the Carnegie.
		Wible said the eomaia was likely a "transitional" species, meaning it possessed traits of modern placental mammals and the mammals from which it evolved.
		The research of the eomaia is funded by the Carnegie, the National Science Foundation, the National Geographic Society, the Natural Science Foundation of China and Ministry of Land Resources of China.
	www.pittsburghlive.com /x/tribune-review/news/s_68058.html (599 words)

	Carnegie scientists jump for joy over very old mammal fossil
		Eomaia didn't necessarily live in trees, but its ability to climb shows that it was able to fill a niche of its own.
		Though the young of the Eomaia would be nourished through a placenta while in the womb, the presence of epipubic bones suggests newborns would latch onto a nipple or otherwise hang on the mother for some time following birth, similar to marsupials, which carry their young externally for extended periods.
		Eomaia is the earliest known placental, but it's unlikely that it was the first.
	www.post-gazette.com /healthscience/20020425mammal2.asp (798 words)

	Eomaia
		An estimate of the bodyweight is between 20-25g.
		"On the basis of 268 characters sampled from all major Mesozoic mammal clades and principal eutherian families of the Cretaceous, Eomaia is placed at the root of the eutherian tree with Murtoilestes and Prokennalestes.
		Eomaia is placed in Eutheria by numerous apomorphies in the dentition, the wrist and the ankle", (Qiang et al 2002, p.820).
	www.ebroadcast.com.au /lookup/encyclopedia/eo/Eomaia.html (451 words)

	Eomaia - China-related Topics EM-EP - China-Related Topics
		Eomaia scansoria ('dawn mother') is a recently discovered extinct mammal that may be one of the earliest ancestors of the eutheria yet to have been found.
		According to palaeontologist Anne Weil, Eomaia was not a Placentaliaplacental mammal.
		The authors claim that on the basis of 268 characters sampled from all major Mesozoic mammal clades and principal eutherian families of the Cretaceous, Eomaia is placed at the root of the eutherian tree with Murtoilestes and Prokennalestes.
	www.famouschinese.com /virtual/Eomaia (464 words)

	The Hindu : Our earliest mammalian relatives
		Eomaia, which means ancient mother, comes from the Yixian formation, the source of the famous feathered dinosaurs.
		The shape of the claws, its limb proportions and its long fingers and toes show Eomaia had a highly specialised climbing ability, and was active both on the ground and in the lower reaches of bushes.
		Eomaia also has an epipublic bone, a structure that supports young in the pouches of modern marsupials but is missing in placental mammals.
	www.hindu.com /thehindu/seta/2003/05/15/stories/2003051500110300.htm (366 words)

	Stunning fossil is human's earliest mammal relative - 24 April 2002 - New Scientist
		The shape of the claws, its limb proportions and long fingers and toes show Eomaia had a highly specialised climbing ability, and was active both on the ground and in the lower reaches of bushes, says Luo, a member of the Chinese-American team that described the creature.
		Although Eomaia is not a direct ancestor of all placental mammals, it "could be our great-great uncle or aunt 125 million years removed", says Luo.
		Eomaia also has an epipubic bone, a structure that supports young in the pouches of modern marsupials but is missing in placental mammals.
	www.newscientist.com /article.ns?id=dn2210 (484 words)

	Eomaia - Sinofossa Institute (Site not responding. Last check: 2007-10-08)
		Eomaia scansoria is a well-preserved eutherian mammal from the Early Cretaceous with bearing on the timing of the phylogenetic diversification and the locomotory evolution of the earliest eutherians.
		Phylogeny of eutherian Eomaia scansoria (a) and timing of the earliest evolution of eutherians (b).
		The earliest molecular estimate of divergence of superordinal placental clades is 104 Myr.
	www.sinofossa.org /mammal/eomaia.htm (199 words)

	ScienceNow -Boa Constrict-o-Meter
		Eomaia's age and characteristics place it near the base of the placental-mammal family tree.
		When trying to figure out the relationships of placental orders, paleontologists need to know which anatomical traits came from ancestors and which are newly evolved--sometimes an impossible task when the most ancient eutherians were known only from teeth and jaws.
		Eomaia also goes a little way toward closing a long-standing gap between fossil evidence and molecular dates for milestones in mammalian history.
	bric.postech.ac.kr /science/97now/02_4now/020425a.html (284 words)

	MESOZOIC MAMMALS; 'basal' Eutheria, an internet directory
		As non-mammalian tritylodontids had them too, the characteristic even pre-dates Mammalia, (Reilly and White 2003, p.400.) The build of the hips suggests there wasn't enough room for a wide birth canal, and that points to a mode of reproduction involving poorly developed, new born babies.
		Eomaia is placed in Eutheria by numerous apomorphies in the dentition, the wrist and the ankle", (Ji et al 2002, p.820).
		Eomaia is the earliest eutherian known, but it wasn't the first to have lived.
	home.arcor.de /ktdykes/baseuth.htm (3708 words)

	Eomaia - Wikipedia, the free encyclopedia
		Eomaia scansoria ('climbing dawn mother') is a recently discovered extinct mammal that may be one of the earliest ancestors of the eutheria yet to have been found.
		Eomaia is placed in Eutheria by numerous apomorphies in the dentition, the wrist and the ankle.
		The previous record for such a feature was about 60 million years ago - this fossil is around 65 million years older.
	en.wikipedia.org /wiki/Eomaia (428 words)

	Shrewlike early mammal fossil found / Find helps scientists date evolution of womb-placenta system
		Dubbed Eomaia, or "Dawn Mother," the primitive little beast was no bigger than a large mouse, but its remains shed new light on the evolution of mammals during an era when dinosaurs ruled the earth, the international team of fossil hunters said.
		Three later versions of Eomaia's animal class have been discovered in recent years, but only their teeth and a few bits of jawbone were found.
		Although the fossil evidence is still sparse, Luo speculates that Eomaia scansoria was the direct ancestor of the true placental mammals, and that its evolution could have diverged from the marsupials and monotremes about 220 million years ago.
	www.sfgate.com /cgi-bin/article.cgi?f=/c/a/2002/04/25/MN529292.DTL (678 words)

	main (Site not responding. Last check: 2007-10-08)
		The skeleton of Eomaia is about 14 cm long, with an estimated weight of between 200 and 250 grams.
		"These features indicate that Eomaia looked like today's mouse,and was capable of climbing and scurrying on the uneven surface of the ground and had adapted to climbing the lower branches of the trees and bushes," said Ji.
		Zhang Jianping, another scientist participating in the study from the China University of Geosciences, said that Eomaia was covered by the ash after a volcanic eruption and well preserved through years of history.
	www.tibetinfor.com.cn /en/news/2002/04/c042262.htm (451 words)

	Eomaia (Site not responding. Last check: 2007-10-08)
		Eomaia was found [in 2000] at a site northeast of Beijing in China.
		Eomaia is the earliest known representative of the mammalian subclass Eutheria (placental mammals).
		According to the NPR report, "Eomaia was adapted to scramble through bushes and trees - presumably to find food, but also to get away from predators, which could well have included small dinosaurs." The reconstruction at right is posed in a dawn redwood, a relative of modern Sequoias and Redwoods.
	www.mun.ca /biology/scarr/Eomaia_fossil_find.htm (202 words)

	Homer News OnlineBuilding a 46-foot dream 03/04/04
		The couple's project, the Eomaia, is a 46-foot steel work vessel built for extended duty in Alaska waters.
		With the Eomaia fully supported in dry dock, the couple's stout trailer was sold to Marian Beck and now supports the M/V Danny J in the winter.
		The couple says they are on pace to put the Eomaia in the water by 2005, and they are actively searching for clients who want to use her for research.
	www.homernews.com /stories/030404/new_030404new001001.shtml (1226 words)

	Station Information - Eomaia
		Genus: Eomaia Ji Q, Luo ZX, Yuan CX, Wible JR, Zhang JP & Georg JA, 2002
		Species: Eomaia scansoria Ji Q, Luo ZX, Yuan CX, Wible JR, Zhang JP & Georg JA, 2002
		It is an early, primitive representative of the lineage that eventually led to placental mammals," said Anne Weil, [1].
	www.stationinformation.com /encyclopedia/e/eo/eomaia.html (457 words)

	CNN.com - Cool science: Origin clues from 'dawn mother' - April 25, 2002
		Eomaia (seen above in an artist's conception) likely lived in an area that was lush and densely vegetated.
		Scientists believe better understanding of this small creature and its habits, such as its ability to climb, could help explain why this type has survived for more than 100 million years while other types did not.
		Luo says the area is like a "mesozoic Pompeii," with fossils well preserved in layers of volcanic ash, which is an excellent condition for recovering them.
	archives.cnn.com /2002/TECH/science/04/25/coolsc.mammal (608 words)

	claws - - science news articles online technology magazine articles claws (Site not responding. Last check: 2007-10-08)
		Eomaia, the earliest known placental mammal, had two layers of fur—an undercoat covered by longer guard hairs—just like that of many modern dogs.
		Eomaia's anatomy hints at what mammalian life was like back in the Mesozoic Era.
		The creature's long, curved fingers and sharp claws suggest that Eomaia was highly skilled at climbing trees and shrubs, an adaptive development that most scientists thought happened tens of millions of years later.
	www.discover.com /issues/aug-02/rd/breakclaws (360 words)

	Resources @ NationalGeographic.com
		Now scientists have discovered that this lifestyle likely existed much deeper in the family tree, back in the time when eutherians, the group that represents about 90 percent of living mammals (including placental mammals from rodents to humans), had begun to differentiate themselves from marsupials (mammals with pouches).
		Eomaia’s fingers and toes are long and tipped with curved claws, adaptations for life in the branches.
		The Eomaia find could mean that today’s eutherians come from a lineage that’s been up in the trees since deep in the age of dinosaurs.
	magma.nationalgeographic.com /ngm/0210/resources_geo5.html (283 words)

	Evolution - New discoveries of fossil mammals fill in the blanks
		The proportion and curvature of Eomaia’s fingers reveal it was a climber.
		Since most mammals living today are placental, all may point to Eomaia scansoria as an ancient ancestor." Eomaia scansoria — Eomaia, Greek for “ancient mother” and scansoria, Latin for “climber” — is the world’s earliest known placental mammal.
		Eomaia posesses epipubic bones, a feature of marsupial mammals but not advanced placentals.
	darwiniana.org /NewFossilMammals.html (1480 words)

	Genus Eomaia Ji Q Luo ZX Yuan CX Wible JR Zhang... (Site not responding. Last check: 2007-10-08)
		Genus Eomaia Ji Q Luo ZX Yuan CX Wible JR Zhang...
		"First of all, Eomaia is not a placental placental mammal.
		It is an early, primitive representative of the lineage that eventually led to placental mammals," said Anne Weil,.
	www.biodatabase.de /Eomaia (472 words)

	Earliest Known Ancestor of Placental Mammals Discovered
		The fossil of the animal, named Eomaia scansoria, was found in the fossil-rich region of Liaoning Province in China, which has also produced ancient evidence of feathered dinosaurs and primitive birds.
		Eomaia, which means "ancient mother" in Greek, was five inches (14 centimeters) long and weighed no more than 0.9 ounces (25 grams).
		The fossil of the animal named Eomaia scansoria was found in the fossil-rich region of Liaoning Province in China.
	news.nationalgeographic.com /news/2002/04/0423_020425_firstmammal.html (660 words)

	Your group:Fossil Groups: SciComms 05-06: Earth Sciences (Site not responding. Last check: 2007-10-08)
		Eomaia was a shrew sized mammal 16 cm long and weighed approximately 20 g.
		The specimen of Eomaia is exceptionally well preserved and exhibits clear fur around the skeleton.
		Athough it is a clear placental mammal, Eomaia still retains the epipubic bones that support the pouch in both primitive and modern marsupial species.
	palaeo.gly.bris.ac.uk /Palaeofiles/Fossilgroups/Placent/FR.html (233 words)

	Eomaia scansoria - earliest eutherian mammal (via CobWeb/3.1 planetlab2.tamu.edu) (Site not responding. Last check: 2007-10-08)
		The new species is named Eomaia (Dawn Mother in Greek) scansoria (climber in Latin).
		There are many other transitional mammalian features, such as 5 incisors in the upper jaw which is diagnostic of metatherians (marsupials) although the molar to premolar ratio (it has more pre-molars than molars) places it firmly amongst the eutherians (placentals).
		Given this mosaic of metatherian and eutherian features, along with many other derived and primitive features, it is clear that Eomaia has transitional characteristics.
	www.evolutionpages.com.cob-web.org:8888 /Eomaia%20scansoria.htm (848 words)

	Pittsburgh Post-Gazette - Photo Journal
		The fact it can climb helped put Eomaia scansoria on the family tree of modern placental mammals, the most diverse mammalian group in the world.
		Eomaia scansoria is the oldest-known and most primitive fossil eutherian.
		Study by scientists from the Carnegie Museum of Natural History and the Chinese Academy of Geological Sciences show that Eomaia is at the root of the placental mammals, and helps to establish the earliest possible divergence time of all eutherians (including the placentals).
	www.post-gazette.com /journal/photos_display.asp?ID=7273 (145 words)

	The Scientist : Mammalian ancestors
		In 25 April Nature, Ji Qiang and colleagues at the Chinese Academy of Geological Sciences, Beijing, report the discovery of an almost intact fossil eutherian mammal that is 125 Myr old (Nature 2002, 416:816-822).
		identified Eomaia scansoria (Eomaia meaning 'Dawn Mother' and scansoria denoting its probable climbing behavior) from the Yixian Formation of Liaoning Province, China, that has yielded insects and feathered dinosaurs in the past.
		From phylogenetic analysis they conclude that, although it is a primitive placental mammal, it probably reproduced like a marsupial.
	www.the-scientist.com /news/20020425/03 (253 words)

	Dinosaurs \| American Museum of Natural History
		Scurrying beneath the feet of large dinosaurs, early mammals were often quite small.
		This shrewlike mammal from Liaoning, China, named Eomaia ("ee-oh-MY-ah"), is considered to be a close relative of all living placental mammals, which give birth to live young.
		Other mammals found at Liaoning were the size of dogs and preyed on dinosaurs.
	www.amnh.org /exhibitions/dinosaurs/diorama (207 words)

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