I= A REVISION OF THE GENUS DYSDERCUS GUERIN-MENVILLE (HEMIPTERA: PYRRHOCORIDAE) OF THE WORLD AND THEIR CLADISTICS
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Title of Thesis
A REVISION OF THE GENUS DYSDERCUS GUERIN-MENVILLE (HEMIPTERA: PYRRHOCORIDAE) OF THE WORLD AND THEIR CLADISTICS

Author(s)
Syed Salahuddin Qadri
Institute/University/Department Details
Department of Zoology/ University of Karachi
Session
2006
Subject
Zoology
Number of Pages
347
Keywords (Extracted from title, table of contents and abstract of thesis)
dysdercus guerin-menville, hemiptera, pyrrhocoridae, cladistics, pyrrhocorid, cotton stainers, capsular lamella, apical process, paramere, aedeagus, sclerotized conjunctival appendages, spermatheca, spermathecal duct, ameridysdercus

Abstract
Thirty six species of the most important pyrrhocorid genus Dysdercus Guerin-Meneville commonly known as cotton stainers of utmost economic importance including one new species from different parts of the world are described in detail with special reference to male genitalia including the structure of vertical process, capsular lamella, apical process, paramere with spurs having different surfaces and dentations between these spurs, inflated aedeagus with membranous and sclerotized conjunctival appendages and female genitalia including spermatheca with accessory gland, spermathecal duct and its convolutions.

Earlier many of these species were unknown with reference to the above indeed very important characters of phylogenetic importance and therefore the evolutionary and systematic relationships of these were disputed even after the excellent revisional works by Freeman (1947) and Doesburg (1968). In the above light sixty seven species from all over the world were also studied and their above characters were scanned from the available literature.

Because of the disputed taxonomic status of many of the subspecies race and so called varieties of Freeman (1947), Stehlik (1965) and Doesburg (1968) after the analysis of populations of a large number of specimens in some of the presently studied species from different localities, a decision on their taxonomic status are for the time being withheld for such a decision could only be taken after examination of world collection at a much wider level. To the already four established subgenera of Freeman (1947) and Stehlik (1965) a fifth endemic new world subgenus Ameridysdercus is presently recognized and described with reference to the above characters.

The characters of taxonomic and c1adistic importance are not only recognized and described in detail but also their polarities are deduced by comparison their presence or absence in the out group Le. Dindymus species available in the collection of author's supervisor, his many studies on the revision of this and many related genera with special thanks to his completed United States Department of Agriculture and Pakistan Agriculture Research Council's sponsored project (PK-SEA-155, FG-361), "On a Revision of Pentatomomorphous superfamily Pyrrhocoroidea with reference to Phylogeny.

For the first time key to all the five present subgenra and sixty seven world species of cotton stainer's genus Dysdercus of utmost economic importance with many species of extremely disputed taxonomic status is formulated. Cladistic and phylogenetic studies of all the known subgenera and all the known world species are also carried out and a c1adogram is constructed on the principle of parsimony and described in detail in the light of some of the disputes noted in the revisional work of those of Freeman (1947) and Doesburg (1968).

Download Full Thesis
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S. No. Chapter Title of the Chapters Page Size (KB)
1 0 Contents
422.65 KB
2 1 Introduction 1
141.84 KB
3 2 Review Of Literature 7
188.83 KB
4 3 Materials And Methods 15
8200.16 KB
  3.1 Taxonomical, Faunistic And Revisional Studies 19
  3.2 Genus Dysdercus Guerin Meneville 19
  3.3 Characters Of Taxonomic Importance 236
  3.4 Cladistic Analysis Of The Dysdercus Species 274
5 4 Acknowledgment 331
87.08 KB
6 5 References 334
274.48 KB