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Difference Between Ratitae and Carinate | Class Aves

The upcoming discussion will update you about the difference between ratitae and carinate. Difference # Ratitae: 1. Running birds. The wings are more or less degenerated and not used in flight. 2. The sternum or breast bone is keel less and raft-like. 3. The skull is dromaeognathous, i.e., the vomer is interposed between the pa­latines, the pterygoids and the basisphenoidal [...]

By |2017-01-11T14:47:29+00:00January 11, 2017|Difference|Comments Off on Difference Between Ratitae and Carinate | Class Aves

Archaeopteryx Characters and Phylogenetic Relationship

The upcoming discussion will update you about the difference between archaeopteryx characters and phylogenetic relationship. Difference # Archaeopteryx Characters: 1. Presence of feather. 2. Hallux (great toes) opposable. 3. Bones non-pneumatic 4. Large orbit with sclerotic rings. 5. Antorbital foramen. 6. Post-dentary fenestra. 7. Teeth socketed. 8. Vertebrae amphicoelous. 9. Cervical vertebrae six and bear ribs. 10. 19-20 trunk vertebrae; [...]

By |2017-01-11T14:47:28+00:00January 11, 2017|Difference|Comments Off on Archaeopteryx Characters and Phylogenetic Relationship
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