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Topic: Monotreme


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In the News (Sun 22 Nov 09)

  
  Monotreme - Wikipedia, the free encyclopedia
Monotremes were very poorly understood for many years, and to this day some of the 19th century myths that grew up around them endure.
It now seems plain that modern monotremes are the survivors of an early branching of the mammal tree; a later branching is thought to have led to the marsupial and placental groups.
The key physiological difference between monotremes and other mammals is the one that gave them their name; Monotreme means 'single opening' in Greek, and comes from the fact that their urinary, defecatory, and reproductive systems all open into a single duct, the cloaca.
en.wikipedia.org /wiki/Monotreme   (793 words)

  
 Monotreme
Monotremes are mammals that are best known for laying eggs, instead of giving birth to live young like marsupials and placental mammals (eutheria).
Their metabolic rate is remarkably low by mammalian standards, alhough the extent to which this is a characteristic of monotremes, as opposed to an adaptation on the part of the small number of surviving species to harsh environmental conditions, is uncertain.
Monotremes were very poorly understood for many years, and to this day some of the 19th century myths that grew up around them endure, particularly in the northern hemisphere.
www.ebroadcast.com.au /lookup/encyclopedia/mo/Monotreme.html   (630 words)

  
 Monotreme - MSN Encarta
Monotremes are native to Australia, Tasmania, and New Guinea.
After monotreme eggs are hatched, the young are helpless, and, in the case of the echidna, are carried in shallow abdominal pouches.
Young monotremes do not have mouth parts suitable for suckling; the liquid produced by the nippleless mammary organ is licked from the belly hair of the mother.
encarta.msn.com /encyclopedia_761555366/Monotreme.html   (165 words)

  
 monotreme - HighBeam Encyclopedia   (Site not responding. Last check: 2007-10-22)
MONOTREME [monotreme], name for members of the primitive mammalian order Monotremata, found in Australia, Tasmania, and New Guinea.
Although monotremes possess the distinguishing mammalian features of hair and mammary glands, they are unique among mammals in laying eggs rather than giving birth to live young.
Like birds and reptiles, monotremes have a single opening, the cloaca, for the passage of liquid and solid wastes, the transfer of sperm, and, in the female, the laying of eggs.
www.encyclopedia.com /doc/1E1-monotrem.html   (278 words)

  
 Introduction to the Monotremata   (Site not responding. Last check: 2007-10-22)
Monotremes are not a very diverse group today, and there has not been much fossil information known until rather recently.
In some ways, monotremes are very primitive for mammals because, like reptiles and birds, they lay eggs rather than having live birth.
Like other mammals, however, monotremes have a single bone in their lower jaw, three middle ear bones, high metabolic rates, hair, and they produce milk to nourish the young.
www.ucmp.berkeley.edu /mammal/monotreme.html   (195 words)

  
 Monotreme - EvoWiki   (Site not responding. Last check: 2007-10-22)
The name monotreme means "one-holed," referring to the cloaca, a single hole that serves the urinary tract, anus, and reproductive tract in monotremes.
Monotremes are considered very primitive for mammals because, like reptiles and birds, they lay eggs rather than having live birth.
While monotremes lay eggs they also nurse their young with milk (like mammals, in fact the origin of the name Mammalia), but interestingly never evolved a nipple for delivering the milk and the milk oozes through pores in the mother's skin.
wiki.cotch.net /index.php?title=Monotreme&redirect=no   (334 words)

  
 Following is the monotreme file, as mentioned by Kathleen Hunt. Subject: Monotremes and th
Introduction -- What are monotremes Reptile-like and mammal-like features of monotremes Where do they fit in the evolution of mammals Introduction -- What are monotremes Monotremes are egg-laying mammals found in Australia and on the island of New Guinea (politically Papua-New Guinea in the east and the Indonesian province of Irian Jaya in the west).
While the laying of eggs by the monotremes is the best-known and most obvious similarity that they have to the reptiles, there are a number of other similarities, which will be examined in the next section.
One feature of monotremes which I don't know where it fits is the mechanism for sex determination: "The male is heterogametic, that is, he produces two kinds of sperm, as humans do, one with a Y chromosome and the other with an X chromosome...
www.skepticfiles.org /evolut/monotrem.htm   (1105 words)

  
 MONOTREMES: ABOUT THE ROLE OF PERMOTRIASSIC AND JURA-CRETACEOUS BOUNDARIES IN THE ATHERIAN-THERIAN DIVERGENCE
So monotremes vs. other recent mammals seem a good example for highways and sidetracks of the evolution, and we learn something by observing the details of mammalian evolution.
Eutherians and monotremes are similar in the jaw and ear structure but not in the structure of molars.
Metatherians and monotremes are similar in the original number of incisors, in the presence of epipubis, and in a number of plesiomorhic structures.
www.rmki.kfki.hu /~lukacs/MONOTREME.htm   (6974 words)

  
 eyeteeth: Their cousin called monotreme
The platypus is the famous monotreme; less well known for some reason (though even weirder in my opinion) is the echidna, also known more descriptively as the spiny anteater.
Monotremes are mammalian, even if what they have is a kind of free demo version of mammalianism without the really useful features like live birth, so they lactate.
Monotremes are the oldest trunk of the mammal family tree.
eyeteeth.livejournal.com /51466.html   (1551 words)

  
 Platypus (Ornithorhynchus anatinus) Online Resource Guide: BIBLIOGRAPHY
Baldwin, J., Temple-Smith, P. Distribution of LDHX in mammals: presence in marsupials and absence in the monotremes platypus and echidna.
Keast, J. Innervation of the monotreme gastrointestinal tract: a study of peptide and catecholamine distribution.
Ladhams, A., Pickles, J. Morphology of the monotreme organ of Corti and macula lagena.
www.rentcomputers.com /rgbiblio.html   (3178 words)

  
 Monotreme
They thought monotremes might actually be primitive reptiles known as therapsid reptiles.
They thought they could be related to multiberculates, a group of plant-eating mammals that evolved towards the end of the Age of Dinosaurs and became extinct early in the Age of Mammals.
Monotremes have “marsupium” bones, the bones that gave marsupials their name.
www.fauna.com.au /monotreme/monotreme.php   (253 words)

  
 Fossil Record of the Monotremata
A second jaw, described as Kollikodon ritchiei, was found in 1995 from deposits of similar age, suggesting that monotremes had already diversified by the Early Cretaceous.
During the 1970s, the first Tertiary monotreme fossils were uncovered in southern Australia.
A new family of monotremes from the Cretaceous of Australia.
www.ucmp.berkeley.edu /mammal/monotremefr.html   (466 words)

  
 Monotreme Games and More
Any copying of elements originally derived from Monotreme Games is expressly prohibited, this includes reproduction of tables, text, forms, pages, ideas and this text.
If you would like to use a certain element from a Monotreme Games page, please send the details of your request to monotreme.games@gmail.com.
Access us from www.monotremegames.au.ms, the new Monotreme Source (Under construction) from source.monotremegames.au.ms and the forums from forums.monotremegames.au.ms.
www.freewebs.com /monotreme_games/start.htm   (603 words)

  
 Pelican Lagoon Research Centre - Monotremems
Echidnas are mammals; they have hair and suckle their young on milk.
Monotremes are a special group of mammals which lay eggs.
There are three monotremes living on the planet today: the platypus, the short beaked echidna (just called echidna) and the long beaked echidna.
www.echidna.edu.au /monotremes/monotremes.html   (172 words)

  
 Club Monotreme   (Site not responding. Last check: 2007-10-22)
Club Monotreme is a dive bar in the East Bay neighborhood known as the Western Lands.
Club Monotreme was the only bar in the neighborhood, and the artists began hanging out there, and talked the owner, known as Mama Frank, (Frank being her surly son who manages the place), into letting them put on shows and hold meetings there.
Mandi held her wedding at Club Monotreme, but it wasn't nearly as spectacular as that of Norman and Marcie.
pages.sbcglobal.net /sarahell/monotreme.html   (221 words)

  
 Ocellated » Friday Monotreme Blogging
These amazing animals are monotremes — egg laying mammals, like the Duck-billed Platypus.
In addition to egg-laying, they also have a cloaca —; a single opening through which urine and feces pass.
Monotremes truly are relics to a time long ago.
www.ocellated.com /2006/03/03/friday-monotreme-blogging   (264 words)

  
 www.myspace.com/monotremerecords
Monotreme Records is an independent record label based in London UK.
We are just putting finishing touches to new mini album, would you care for a full copy or a demo (the album is only 25mins) let us know, keep up the good work.
well mr monotreme, you have some of the better things that can be heard.is that platypus in the picture your in-house sound engineer.whoever ot is, that platypus looks to be having a good time.cheers, you have good Taste
www.myspace.com /monotremerecords   (1224 words)

  
 Highbeam Encyclopedia - Search Results for monotreme   (Site not responding. Last check: 2007-10-22)
monotreme MONOTREME [monotreme], name for members of the primitive mammalian order Monotremata, found in Australia, Tasmania, and New Guinea.
Also called duckbill, or duckbilled platypus, it belongs to the order Monotremata (see monotreme), the most primitive group of living mammals.
The only other member of this group is the
www.encyclopedia.com /articles/08685.html   (356 words)

  
 Monotreme fossil
The specimen is a monotreme like the platypus and echidna, which, unlike other mammals, lay eggs and lack whiskers, teeth and external ears.
"What is special about it is it has aspects that suggests monotremes split away from other mammals (such as the koala and wallaby) much earlier than we thought," the Melbourne Museum curator of vertebrate palaeontology, Tom Rich, said.
Dr Rich said this phenomenon was called conversion evolution, where different ancestors produced the same evolutionary result.
www.meta-religion.com /Archaeology/Northamerica/monotreme_fossil.htm   (366 words)

  
 Hill monotreme images
Below are thumbnails of unpublished photographs of monotreme embryos in the JP Hill collection.
Clicking on the image will lead to a larger version of this image and descriptions of the material (not all links are complete -- site under construction).
These photographs were made by Hill in 1943.
www.biology.duke.edu /kksmithlab/JPHill/monotreme_images.htm   (114 words)

  
 Short-nosed Echidna - National Zoo| FONZ
Short-nosed echidnas have been known to live for more than 50 years.
Monotremes' average temperature is several degrees lower than that of most other mammals.
Although echidnas are also known as spiny anteaters, they are a completely separate order of mammals.
nationalzoo.si.edu /animals/smallmammals/fact-echidna.cfm   (297 words)

  
 The Morning News - The Letters of Gary Benchley, Rock Star: Benchley Athletic, by Gary Benchley
Her brother, who was some sort of multi-media artist electronics guy, had a huge pile of electronic geegaws that he didn’t want.
He was giving them to Katherine so that people at Monotreme could use them in their art.
When we got back to Monotreme, I helped her unload the electronics, and drag them down to her basement, into storage bins.
www.themorningnews.org /archives/new_york_new_york/the_letters_of_gary_benchley_rock_star_benchley_athletic.php   (2413 words)

  
 Comparative sequencing provides insights about the structure and conservation of marsupial and monotreme genomes -- ...
Comparative sequencing provides insights about the structure and conservation of marsupial and monotreme genomes -- Margulies et al.
and birds reside the marsupials and monotremes (12, 13).
or monotreme sequence have been reported to date.
www.pnas.org /cgi/content/full/102/9/3354   (3855 words)

  
 Monotreme on 43 People
Why things are awkward between me and Monotreme
Monotreme was one of the best professors I have ever had!
I was surprised and excited to see Monotreme here on 43T; and I am glad to see he is still having fun and doing well!
monotreme.43people.com   (542 words)

  
 Search Results for "Monotreme"
monotreme, (mon“trem“) (KEY), name for members of the primitive mammalian order Monotremata, found in Australia, Tasmania, and New Guinea.
...The banded anteater of Australia is a marsupial; the spiny anteater, also of Australia, is a monotreme related to the platypus.
Search for books related to your query at Amazon.com:
www.bartleby.com /cgi-bin/texis/webinator/sitesearch?FILTER=&query=Monotreme   (147 words)

  
 A Cretaceous symmetrodont therian with some monotreme-like postcranial features : Nature
But unlike the closely related spalacotheroids and living therians, this new mammal revealed some surprisingly convergent features to monotremes in the lumbar vertebrae, pelvis and hindlimb
These peculiar features may have developed as functional convergence to locomotory features of monotremes, or the presence of lumbar ribs in this newly discovered mammal and their absence in its close relatives might be due to evolutionary developmental homoplasy.
Analysis including this new taxon suggests that spalacotheroids evolved earlier in Eurasia and then dispersed to North America, in concordance with prevailing geodispersal patterns of several common mammalian groups during the Early Cretaceous period.
www.nature.com /nature/journal/v439/n7073/abs/nature04168.html   (232 words)

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