Phylogeny, Classification, and Biogeography of the Cycloteline Therevinae (Diptera: Therevidae)
Gaimari, Stephen David
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https://hdl.handle.net/2142/86480
Description
Title
Phylogeny, Classification, and Biogeography of the Cycloteline Therevinae (Diptera: Therevidae)
Author(s)
Gaimari, Stephen David
Issue Date
1998
Doctoral Committee Chair(s)
Irwin, Michael E.
Department of Study
Entomology
Discipline
Entomology
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Biology, Genetics
Language
eng
Abstract
Twenty-one members of the Laurasian group of Therevinae (Diptera: Therevidae) are compared using 65 adult morphological characters. Cladistic analysis using parsimony on the 17 ingroup and 4 outgroup taxa provides a well supported hypothesis of relationships among taxa within the Cyclotelini, tribe nov. The Cyclotelini is a monophyletic assemblage of mostly New World genera, including Anolinga, gen. nov., Breviperna Irwin, Coleiana, gen. nov., Crebraseta, gen. nov., Cyclotelus Walker, Nesonana, gen. nov., and Ozodiceromyia Bigot. In addition, three Old World genera, Ammothereva Lyneborg, Bugulaverpa, gen. nov., and Procyclotelus Nagatomi and Lyneborg, are included in the tribe. These ten genera are divided into two monophyletic genus-groups, the Breviperna -group and the Cyclotelus group. Keys are provided for the genera of Cyclotelini. The tribe, the two informal genus-groups, and all genera are diagnosed; five new genera and six new species are proposed. The biogeographical histories of the genera are discussed in terms of their cladistic relationships using methods of cladistic biogeography. Two major vicariant pathways account for the current distribution of the tribe. The first is the Beringian land bridge connecting western North America and eastern Asia. Second, New World cyclotelines were profoundly affected by the Early Eocene breakup of the archipelagic bridge between North and South America, and the distributions support hypotheses favoring continental origins of the Greater Antilles. Ozodiceromyia is considered in more detail from a phylogenetic perspective, and relevant literature is summarized for all species in the genus. Twenty-seven members of this genus are compared using 70 adult morphological characters. Cladistic analysis using parsimony is utilized to erect a phylogenetic framework into which the large undescribed fauna (80+ species) will be incorporated. The 11 species-groups hypothesized represent the beginning of a phylogenetic classification for Ozodiceromyia , and are the first step to understanding the diversity and evolution of the genus.
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