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Revision of the Western Palearctic Meteorini (Hymenoptera, Braconidae), with a molecular characterization of hidden Fennoscandian species diversity
Stockholm University, Faculty of Science, Department of Zoology.
2011 (English)In: Zootaxa, ISSN 1175-5326, E-ISSN 1175-5334, no 3084, 1-95 p.Article in journal (Refereed) Published
Abstract [en]

The tribe Meteorini includes two genera, Meteorus and Zele, which are koinobiont endoparasitoids of larval Lepidoptera and Coleoptera. More than 300 species are known, about one fifth of which occur in the Western Palearctic. Here, we re- vise the Western Palearctic species, based partly on traditional approaches and partly on molecular analysis of recent Swedish and Finnish material. For the analyses of phylogenetic relationships and cryptic species diversity, we coded 17 morphological characters and sequenced two markers, 28S D2 (649 bp) and CO1 (665 bp). More than 1 970 specimens representing 54 species of Meteorus Haliday and 5 species of Zele Curtis were studied; of these, 177 specimens represent- ing 41 species were sequenced. Seven new species are described, all from the Fennoscandian material: Meteorus artocer- cus sp. nov., M. densipilosus sp. nov., M. eklundi sp. nov., M. longipilosus sp. nov., M. sibyllae sp. nov., M. stenomastax sp. nov., and M. subtilisulcus sp. nov. Four new synonyms are introduced: Z. chlorophthalmus (Spinola 1808), syn. nov. for M. pallidus (Nees 1812), M. punctifrons Thomson 1895, syn. nov. for M. varinervis (Tobias 1986), M. melanostictus Capron 1887, syn. nov for M. monachae (Tobias 1986), and M. tenellus Marshall 1887, syn. nov. for M. boreus (Tobias 1986). Meteorus tenellus is removed from synonymy with M. cinctellus. Sequence analysis indicated the presence of at least 12 additional cryptic species but these cannot be separated morphologically at this point and, therefore, we do not describe them here. The phylogenetic results suggest that Zele should be included within Meteorus but we refrain from formal changes of the generic classification until more comprehensive phylogenetic analyses of the tribe can be complet- ed. A key to the known Western Palearctic species is presented.

Place, publisher, year, edition, pages
2011. no 3084, 1-95 p.
Keyword [en]
parasitic wasps, molecular taxonomy, cryptic species, general mixed Yule coalescent, evolution, host prefer- ences, identification keys
National Category
Zoology
Research subject
Systematic Zoology
Identifiers
URN: urn:nbn:se:su:diva-63793ISI: 000296876700001OAI: oai:DiVA.org:su-63793DiVA: diva2:452530
Projects
The Swedish Taxonomy Initiative
Note

AuthorCoun4: 2;

Available from: 2013-01-21 Created: 2011-10-31 Last updated: 2017-12-08Bibliographically approved
In thesis
1. Hidden Creatures – systematics of the Euphorinae (Hymenoptera)
Open this publication in new window or tab >>Hidden Creatures – systematics of the Euphorinae (Hymenoptera)
2013 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Parasitic wasps constitute one of the last remaining frontiers in the charting of animal diversity. The Braconidae is the second most species-rich family of parasitic wasps; the world fauna has been estimated at 40 000 species and the Swedish fauna is believed to include a little more than 2 000 species, 1 200 of which are currently documented. This thesis is a contribution to the rapidly increasing knowledge of braconid diversity. In paper I, a new gregarious parasitoid, Meteorus acerbiavorus sp. nov. (Braconidae: Eupohrinae), is described from specimens reared from the cocoons of the butterfly Acerbia alpina (Quensel) (Lepidoptera, Arctiidae) in northwestern Finnish Lapland. Based on a molecular phylogenetic analysis, the new species is shown to belong to the M. rubens species group. In the second paper, the Western Palearctic fauna of the tribe is revised, seven new species are described and a key to the Western Palearctic species is presented. Two molecular markers, 28S and COI, are used to study phylogenetic relationships in the tribe. The molecular results showed that the Meteorini fall into four well supported clades. The results also reveal a considerable cryptic species diversity. The third paper deals with distributional, phenological and in many cases rearing data from nearly 2 500 specimens (44 species) of the Meteorini in the collection of the National Museums of Scotland (NMS), Edinburgh. Patterns in the breadth of host ranges are discussed in relation to a reiterated speciation hypothesis. Paper IV examines the phylogenetic relationships of the entire subfamily Euphorinae based upon four gene regions (18S, CAD, 28S D2, and COI). A revised classification of the Euphorinae is proposed that recognizes 55 genera and 14 tribes. Our study shows that early members of the Euphorinae were parasitoids of coleopteran larvae, with a host shift to larval Lepidoptera, adult or immature hosts in the Hemiptera, Hymenoptera, Neuroptera, Orthoptera and Psocoptera.

Place, publisher, year, edition, pages
Stockholm: Department of Zoology, Stockholm University, 2013. 40 p.
Keyword
Parasitic wasps, Braconidae, Euphorinae, systematics, phylogeny, molecular taxonomy, cryptic species, evolution, host preferences, identification keys
National Category
Zoology
Research subject
Systematic Zoology
Identifiers
urn:nbn:se:su:diva-87904 (URN)978-91-7447-605-7 (ISBN)
Public defence
2013-05-17, Lilla hörsalen, Naturhistoriska riksmuseet, Frescativägen 40, Stockholm, 10:00 (English)
Opponent
Supervisors
Note

At the time of the doctoral defense, the following papers were unpublished and had a status as follows: Paper 3: In press. Paper 4: Manuscript.

Available from: 2013-04-25 Created: 2013-02-24 Last updated: 2013-04-15Bibliographically approved

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