Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Hidden Creatures – systematics of the Euphorinae (Hymenoptera)
Stockholm University, Faculty of Science, Department of Zoology.
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 [en]
Parasitic wasps, Braconidae, Euphorinae, systematics, phylogeny, molecular taxonomy, cryptic species, evolution, host preferences, identification keys
National Category
Zoology
Research subject
Systematic Zoology
Identifiers
URN: urn:nbn:se:su:diva-87904ISBN: 978-91-7447-605-7 (print)OAI: oai:DiVA.org:su-87904DiVA: diva2:615678
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
List of papers
1. Meteorus acerbiavorus sp. nov. (Hymnoptera, Braconidae), a gregarious parasitoid of Acerbia alpina (Quensel) (Lepidoptera, Arctiidae) in North Finland
Open this publication in new window or tab >>Meteorus acerbiavorus sp. nov. (Hymnoptera, Braconidae), a gregarious parasitoid of Acerbia alpina (Quensel) (Lepidoptera, Arctiidae) in North Finland
2011 (English)In: Journal of Natural History, ISSN 0022-2933, E-ISSN 1464-5262, Vol. 45, no 21-24, 1275-1294 p.Article in journal (Refereed) Published
Abstract [en]

The new gregarious parasitoid Meteorus acerbiavorus sp. nov. (Hymenoptera, Braconidae) was reared from the cocoons of Acerbia alpina (Quensel) (Lepidoptera, Arctiidae) in north-western Finnish Lapland. This species belongs to Meteorus rubens (Nees) species group and differs from the most related M. rubens in the following features: the eyes densely setose; the median lobe of the mesos- cutum, scutellum, mesopleuron, and the hind coxa entirely or at least partly rugulose-granulate or rugose-areolate and sometimes with granulation; the ovipos- itor subapically with distinct dorsal node; the ventral borders of the first metasomal tergum weakly separated by narrow space in its basal half; the colour of the body and legs mostly or entirely dark; the fore wing more or less darkened. Phylogenetic relationships among several Meteorus species close to M. rubens including new M. acerbiavorus were investigated based on DNA sequence fragments of the mito- chondrial COI and the nuclear 28S rDNA genes. The discussions on the species groups of Meteorus, on distribution of Acerbia alpina in the Holarctic and on its known parasitoids are presented.

Keyword
Braconidae, Hymenoptera, Meteorus, gregarious parasitoid of Arctiidae, new species, DNA analysis, result
National Category
Zoology
Research subject
Systematic Zoology
Identifiers
urn:nbn:se:su:diva-62450 (URN)10.1080/00222933.2011.552807 (DOI)000290207700002 ()
Available from: 2011-09-19 Created: 2011-09-19 Last updated: 2017-12-08Bibliographically approved
2. Revision of the Western Palearctic Meteorini (Hymenoptera, Braconidae), with a molecular characterization of hidden Fennoscandian species diversity
Open this publication in new window or tab >>Revision of the Western Palearctic Meteorini (Hymenoptera, Braconidae), with a molecular characterization of hidden Fennoscandian species diversity
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.

Keyword
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:nbn:se:su:diva-63793 (URN)000296876700001 ()
Projects
The Swedish Taxonomy Initiative
Note

AuthorCoun4: 2;

Available from: 2013-01-21 Created: 2011-10-31 Last updated: 2017-12-08Bibliographically approved
3. Western Palaearctic Meteorinae (Hymenoptera: Braconidae) in the National Museums of Scotland, with rearing, phenological and distributional data, including six species new to Britain, and a discussion of a potential route to speciation
Open this publication in new window or tab >>Western Palaearctic Meteorinae (Hymenoptera: Braconidae) in the National Museums of Scotland, with rearing, phenological and distributional data, including six species new to Britain, and a discussion of a potential route to speciation
(English)In: Entomologist's Gazette, ISSN 0013-8894Article in journal (Refereed) In press
Abstract [en]

Distributional, phenological and in many cases rearing data are given for 44 species of western Palaearctic Meteorinae in the genera Meteorus and Zele, from the nearly 2,500 specimens of the group present in the collection of the National Museums of Scotland, Edinburgh. Six species are newly recorded from Britain. Patterns in the breadth of host ranges are discussed in relation to a reiterated speciation hypothesis and a recently published molecular phylogeny.

Keyword
Braconidae, Meteorinae, parasitoids, Meteorus, Zele, phenology, distribution, hosts, Lepidoptera, Coleoptera, host range, speciation, British Isles.
National Category
Zoology
Research subject
Systematic Zoology
Identifiers
urn:nbn:se:su:diva-87905 (URN)
Available from: 2013-02-24 Created: 2013-02-24 Last updated: 2013-07-11Bibliographically approved
4. Phylogeny of the parasitic wasp subfamily Euphorinae (Braconidae) and evolution of its host preferences
Open this publication in new window or tab >>Phylogeny of the parasitic wasp subfamily Euphorinae (Braconidae) and evolution of its host preferences
(English)Manuscript (preprint) (Other academic)
Abstract [en]

The braconid subfamily Euphorinae is a large, cosmopolitan group of endoparasitoid wasps. The majority of species attack adult hosts, a strategy that is rare among parasitic wasps, but there are also many species that attack nymphs and larval stages. Euphorine hosts may belong to a variety of insect orders (Coleoptera, Hemiptera, Hymenoptera, Neuroptera, Psocoptera, Orthoptera and Lepidoptera) although most euphorine tribes are confined to Coleoptera. Here we investigate the phylogenetic relationships of the Euphorinae based on molecular data (3 kb of nucleotide data from four markers: 18S, 28S, CAD and COI) and revise their higher-level classification. We also infer the evolution of host associations, and discuss the diversification of the Euphorinae. Results from both Bayesian inference and maximum-likelihood analysis show that the subfamily, as previously circumscribed, is paraphyletic. We propose that the subfamily be expanded to include the tribes Meteorini and Planitorini (Mannokeraia+Planitorius), so that it corresponds to a clade that is strongly supported as monophyletic in our analyses. Based on our results, a revised higher classification of the Euphorinae is proposed, in which 55 extant genera and 14 tribes are recognized. We reinstate the genus Microctonus belonging to the tribe Perilitini and propose the following tribal rearrangements: Spathicopis and Stenothremma are transferred to Perilitini; Tuberidelus, Sinuatophorus and Plynops to Cosmophorini; Ecclitura and Napo to Dinocampini; Chrysopophthorus and Wesmaelia to Helorimorphini; and Proclithoporus to Townesilitini. The monotypic tribes Cryptoxilonini and Myiocephalini are synonymized with Cosmophorini and Syntretini, respectively. The genus Pygostolus, previously placed among the Centistini, is established as its own tribe Pygostolini. Parsimony-based ancestral state reconstructions suggest that the ancestor of Euphorinae was a parasitoid of coleopteran larvae, and that a host shift to larval Lepidoptera occurred early in the evolution of the Meteorini. In the remainder of the subfamily, there was an initial shift from larval to adult coleopterans, followed by subsequent shifts to adults or larvae of Hemiptera, Hymenoptera, Neuroptera, Orthoptera and Psocoptera.

National Category
Zoology
Research subject
Systematic Zoology
Identifiers
urn:nbn:se:su:diva-89109 (URN)
Available from: 2013-04-11 Created: 2013-04-11 Last updated: 2013-04-12Bibliographically approved

Open Access in DiVA

fulltext(6451 kB)648 downloads
File information
File name FULLTEXT02.pdfFile size 6451 kBChecksum SHA-512
d94f21996eb88f836ecea5691e3299d4630123f47add0948822389e6eb0c1b46c8382693f3443736d1660cc7240bb60e30947537034afc5dc15c82045aec3671
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Stigenberg, Julia
By organisation
Department of Zoology
Zoology

Search outside of DiVA

GoogleGoogle Scholar
Total: 648 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

isbn
urn-nbn

Altmetric score

isbn
urn-nbn
Total: 350 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf