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Topic: Labyrinthodontia


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  Labyrinthodontia - Wikipedia, the free encyclopedia
Labyrinthodont (Greek, "maze-toothed") is an obsolete term for any member of an extinct superorder or subclass (Labyrinthodontia) of amphibians, which constituted some of the dominant animals of Late Paleozoic and Early Mesozoic times (about 350 to 210 million years ago).
The name describes the pattern of infolding of the dentine and enamel of the teeth, which are often all of the creatures that survives.
The groups that have usually been placed within Labyrinthodontia, are currently variously classified as basal tetrapods, non-amniote Reptiliomorpha and as a monophyletic or paraphyletic Temnospondyli, according to cladistic analysis.
en.wikipedia.org /wiki/Labyrinthodontia   (685 words)

  
 Amphibian - Wikipedia, the free encyclopedia
With the cladistic revolution, this classification has been modified, and the Labyrinthodontia discarded as being a paraphyletic group without unique defining features apart from shared primitive characteristics.
Generally amphibians are defined as the group that includes the common ancestors of all living amphibians (frogs, salamanders, etc) and all their descendants.
This means that there are a now large number of basal Devonian and Carboniferous tetrapod groups, described as "amphibians" of earlier books, that are no longer placed in the formal Amphibia.
en.wikipedia.org /wiki/Amphibian   (1219 words)

  
 Labyrinthodontia: Facts and details from Encyclopedia Topic   (Site not responding. Last check: 2007-10-03)
In biology and ecology, extinction is the ceasing of existence of a species or group of species....
A crocodile can be any of the 14 species of large, water-loving reptiles in the family (biology)family crocodylidae (sometimes classified instead as...
In phylogenetics, a grouping of organisms is said to be paraphyletic (greek para = near and phyle = race) if all the members of the group have a common...
www.absoluteastronomy.com /encyclopedia/l/la/labyrinthodontia.htm   (324 words)

  
 Home - Amphibia   (Site not responding. Last check: 2007-10-03)
A Labyrinthodont (Greek, "maze-toothed") is any member of an extinct superorder or subclass (Labyrinthodontia) of amphibians, which constituted some of the dominant animals of Late Paleozoic and Early Mesozoic times (about 350 to 210 million years ago).
Labyrinthodontia Diagnostic features unique to the Labyrinthodontia are hard to find at first glance; the complex dentine infolding tooth structure was shared with crossopterygian fish.
The Labyrinthodontia had a peculiar tooth structure from which their name was derived and, although not exculsive to the group, the labyrinthine dentition is a useful indicator as to proper classification.
the.living.soap.en.infoax.org /en/Amphibia   (8223 words)

  
 Labyrinthodontia - Biocrawler   (Site not responding. Last check: 2007-10-03)
They typically had bodies resembling salamanders or crocodiles.
Today Labyrinthodontia is considered to be paraphyletic by most scholars, and thus not a valid taxon.
You can find it there under the keyword Labyrinthodontia (http://en.wikipedia.org/wiki/Labyrinthodontia)The list of previous authors is available here: version history (http://en.wikipedia.org/w/index.php?title=Labyrinthodontiaandaction=history).
www.biocrawler.com /encyclopedia/Labyrinthodontia   (171 words)

  
 Classification & Natural History of Amphibians
All those little squiggley lines are there as to sort of graphically communicate to you thatthis group of animals, the labyrinthodontia which are represented by those names and lines, was avery diverse group.
And the other piece of evidence that's sort of presented graphically here is that the lines ofevolution that gave rise to the 3 living groups of amphibians, the frogs, a group of animals thatyou probably haven't heard of that are the limbless types, and the salamanders.
And the name "labyrinthodontia" is a reference to the structure of their teeth which, is afairly peculiar tooth structure.
www.csupomona.edu /~dfhoyt/classes/zoo138/CNH_AMPH.HTML   (5346 words)

  
 Archegosaurus decheni
The Crossotterigi ripidisti, which the Labyrinthodontia evolved from, lived during the Devonian in fresh water pools that dotted the arid continental plains.
Some palaeontologists believe that because the Devonian was characterised by dry periods and spells of torrential rain, these water pools dried out periodically.
The Labyrinthodontia flourished in the Carboniferous period, continued to spread in the Permian and the Triassic periods, and finally became extinct at the end of this geological period.
www.musei.unina.it /Paleontologia/eng/3.2.5.2.htm   (323 words)

  
 Amphibians
The amphibians of the Labyrinthodontia, which lived during the late Devonian through Triassic periods (345 to 190 million years ago), include the most primitive amphibians represented by the genus Ichthyostega.
The Labyrinthodontia, according to the U.S. paleontologist Alfred S. Romer, include three extinct orders: the Ichthyostegalia, the Temnospondyli, and the Anthracosauria.
The Anthracosauria are thought to be the ancestors of reptiles and hence of modern birds and mammals.
www.webspawner.com /users/petcentralamphibians   (2008 words)

  
 Bolt (1974) Osteology, function, and evolution of the Trematopsid (Amphibia: Labyrinthodontia) nasal region
Bolt (1974) Osteology, function, and evolution of the Trematopsid (Amphibia: Labyrinthodontia) nasal region
Osteology, function, and evolution of the Trematopsid (Amphibia: Labyrinthodontia) nasal region
To view the the latter's ratings, click on Chapters/Papers/Articles in the STATISTICS box, select a publication from the list that appears, and then click on either Quality or Interest in that publication's STATISTICS box.
www.getcited.org /?PUB=101431993&showStat=Ratings   (98 words)

  
 Amphibians of the Great Lakes RegionCreated with DiDa   (Site not responding. Last check: 2007-10-03)
These animals were fish-like in that they still had the scale structures seen on the skin of fish.
Just as the modern amphibians are aquatic in their early life stage, the Labyrinthodontia were also.
This was discovered through examination of the fossil skulls of juvenile animals of this group.
www.science.mcmaster.ca /Biology/Harbour/SPECIES/FROGS/FROG14.HTM   (329 words)

  
 labyrinthodonta - definition by dict.die.net   (Site not responding. Last check: 2007-10-03)
Labyrinthodonta n : extinct amphibians typically resembling heavy-bodied salamanders or crocodiles and having a solid flattened skull and conical teeth; Devonian through Triassic [syn: Labyrinthodontia, superorder Labyrinthodontia, Labyrinthodonta, superorder Labyrinthodonta]
See Labyrinthodon.] (Paleon.) An extinct order of Amphibia, including the typical genus Labyrinthodon, and many other allied forms, from the Carboniferous, Permian, and Triassic formations.
Some of the Stegocephala were of very large size, and the form of the body varied from short, stout forms to others that were as slender as serpents.
dict.die.net /labyrinthodonta   (139 words)

  
 Geology A-C
Bolt, J. Osteology, Function, and Evolution of the Trema-topsid (Amphibia: Labyrinthodontia) Nasal Region.
Bolt, J. Trematopsid skull from the Lower Permian, and Analysis of Some Characters of the Dissorophoid (Amphibia: Labyrinthodontia) otic notch.
Bolt, J. Cacops (Amphibia: Labyrinthodontia) from the Fort Sill Locality, Lower Permian of Oklahoma.
www.fortsasbooks.com /geology/geology.htm   (290 words)

  
 Labyrinthodontia - Dictionnaire Fran├žais-Anglais WordReference.com
We found no English translation for 'Labyrinthodontia' in our French to English Dictionary.
Or did you want to translate 'Labyrinthodontia' from English to French?
Forum discussions with the word(s) 'Labyrinthodontia' in the title:
www.wordreference.com /fren/Labyrinthodontia   (33 words)

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