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Class aves

Class aves

(Science: ornithology, zoology) a biological class that is composed of all the birds (for example, penguins, pigeons, eagles, canaries, vultures, etc.)


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Re: Pentadactyl limb....

Pentadactyl limbs is a common feature found in tetrapods. The class amphibian, reptile, aves (birds), and mammals fall under this superclass tetrapods. The order primates fall under ...

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by Jean1Mack
Fri Mar 21, 2014 6:55 pm
 
Forum: Zoology Discussion
Topic: Pentadactyl limb....
Replies: 8
Views: 5123

Re: Cladistic relatedness of Aves and Reptiles

According to L.M. Chiappe and G.J. Dyke (2002), "most researchers agree that birds are theropod dinosaurs." Even before this consensus formed, the other candidates for birds' ancestors were all reptiles, specifically turtles, lizards, crocodylomorphs, pterosaurs, and other kinds of dinosau...

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by StevePush
Tue Oct 19, 2010 5:22 pm
 
Forum: Evolution
Topic: Cladistic relatedness of Aves and Reptiles
Replies: 6
Views: 6431

Re: Cladistic relatedness of Aves and Reptiles

I stand by my position that Weston's girlfriend wins the argument. Reptilia is a monophyletic group that includes all birds and extinct dinosaurs. Excluding birds because they are the only extant warmblooded, feathered members of the clade represents historical bias rather than evolutionary relatedn...

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by StevePush
Tue Oct 19, 2010 3:02 pm
 
Forum: Evolution
Topic: Cladistic relatedness of Aves and Reptiles
Replies: 6
Views: 6431

Cladistic relatedness of Aves and Reptiles

... become extremely interested in the evolutionary relation between aves and reptiles. My girlfriend and brother butt heads over the topic. My ... All the research I've done shows that aves and reptiles differ on the class level! Despite all of the anatomical similarities between them, the ...

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by Weston
Sat Oct 16, 2010 8:30 pm
 
Forum: Evolution
Topic: Cladistic relatedness of Aves and Reptiles
Replies: 6
Views: 6431

Evolution of flight!

... Bird wings are formed from feathers growing on the whole of the forelimb: http://www.ucmp.berkeley.edu/vertebrates/flight/aves.html Insects are a law unto themselves, and very often have 2 pairs of wings: http://upload.wikimedia.org/wikipedia/commons/thumb/7/7c/Tau_Emerald_inflight_edit.jpg/300px-Tau_Emerald_inflight_edit.jpg ...

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by Asyncritus
Thu Nov 19, 2009 4:54 pm
 
Forum: Evolution
Topic: Evolution of flight!
Replies: 6
Views: 4852
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