Why not share! Xavier's Colle Embed Size px. Start on. Show related SlideShares at end. WordPress Shortcode. University of Agriculture Faisalabad Follow. Published in: Education. Full Name Comment goes here. Are you sure you want to Yes No. Be the first to like this. No Downloads. Views Total views. Actions Shares. Embeds 0 No embeds. No notes for slide. Themes of avian systematics 1. Allied with classification or taxonomy.
The Ichthyornithiformes could fly and bore teeth in the jaws; known forms seem to have resembled gulls in their lifestyle, if not their structure. Flightless hesperornithiforms seem to have swam by powerful foot propulsion, somewhat like modern cormorants 5.
This group, which first appeared in the Lower Cretaceous, ranged from sparrow-sized birds to birds with wingspans a meter across, and included both toothed and toothless forms. Our knowledge of the Enantiornithes is still changing, and this taxon may turn out to be paraphyletic 6. Avian Phylogeny based on Feduccia 7. Penguins — southern Hemisphere Auks — northern Hemisphere Phylogenetic hypotheses 77 A. Previous attempts 79 B.
Themes of avian systematics
Recent attempts 86 Chapter 7. Cladistic hypotheses 92 A. At species level 92 B. At genus level 98 C. Molecular studies Chapter 8.
- Definition, basic concept and importance of Systematics and Taxonomy - Lutfur Rahman Saikia.
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Cladistic ideas A. Uncertain variation and directed evolution B.
Radiating pattern of evolution C. Sister groups D. Character value A. Character concept B.
Attempts at character weighting C. Character hierarchy Chapter Creation and verification A. Single character and a character set B. Unification and delimitation C. Rank coordination A. Peculiarities of the method B. Aposteriori weighting in practice Chapter Hierarchical type A. Attempts at type presentation B.
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Peculiarities of hierarchical type C. Typology and essentialism Part IV.
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Numerical systematics Chapter Numerical contributions A. Failures B. Merits Conclusion References