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| Author(s): |
Sarah Siqueira de Oliveira
Total Authors: 1
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| Document type: | Doctoral Thesis |
| Press: | Ribeirão Preto. |
| Institution: | Universidade de São Paulo (USP). Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto (PCARP/BC) |
| Defense date: | 2013-04-05 |
| Examining board members: |
Dalton de Souza Amorim;
Eduardo Andrade Botelho de Almeida;
Christopher James Borkent;
Carlos José Einicker Lamas;
Guilherme Cunha Ribeiro
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| Advisor: | Dalton de Souza Amorim |
| Abstract | |
The family Mycetophilidae is the second most diverse of the suborder Bibionomorpha (Diptera), with 233 genera and about 4.500 species known from all biogeographical regions. The monophyly of Bibionomorpha and Mycetophilidae is well corroborated in the literature. The family has been divided in the subfamilies Sciophilinae, Gnoristinae, Mycomyiinae, Leiinae, Manotinae, Allactoneurinae, Mycetophilinae. Currently, Leiinae is one of the subfamilies with less attention in the literature and the knowledge on the relationships between its genera is still incipient. This subfamily comprises a group of genera characterized by a displacement of the base of the radial sector (Rs) towards the wing apex, resulting in a short R1. There are several exceptions that point in doubts the monofiletism of the group and result in different assumptions on the inclusion or not of certain genera in Leiinae, as Docosia Winnertz, Tetragoneura Winnertz, Ectepesthoneura Enderlein, Novakia Strobl, Sticholeia Søli, Aphrastomyia Coher & Lane, among others. The aim of this study was recover the phylogenetic relationships among the Leiinae genera, based on morphology, proposing generic limits for the subfamily. Thus, phylogenetic analyzes were performed with living genera and with the addition of fossil taxa. The phylogenetic analysis indicates that Leiinae is a monophyletic group, characterized by the presence of mesopleurotrochantin and the mesepimeron not reaching the ventral region of the thorax, ending in the mesopleurotrochantin. The genera Docosia, Novakia, Ectrepesthoneura, and Tetragoneura not belongs to Leiinae and are temporalily allocated in Gnoristinae. Sticholeia is not a member of Leiinae as well being sister group of Allactoneura and thus is transferred to Allactoneurinae. Leiinae now comprises 27 living genera. The analysis performed with fossils was not phylogenetically informative. (AU) | |