Phylogenetic implications of the mesosomal skeleton in Chalcidoidea (Hymenoptera, Apocrita) : tree searches in a jungle of homoplasy

  • Results from a comparative anatomical study of the mesosomal skeleton of Chalcidoidea are presented. External and internal features are described and illustrated for 39 chalcidoid taxa, representing 16 families and 29 subfamilies. This is the most comprehensive morphological study ever conducted for the superfamily. The mesosoma was dissected, macerated and investigated using scanning electron microscopy. The mesothorax and metathorax contributed most of the phylogenetically relevant information. The metafurca is highly variable within Chalcidoidea but seems to be relatively constant at the subfamily level. One hundred and fifty-four morphological characters were scored and analysed cladistically. Outgroup species were chosen from six apocritan superfamilies: Stephanoidea, Ceraphronoidea, Cynipoidea, Platygastroidea, Proctotrupoidea and Mymarommatoidea. Some previously suggested chalcidoid relationships were retrieved: (1) Pteromalidae: Pteromalinae + Miscogasterinae + Panstenoninae; (2) Perilampidae + Eucharitidae; (3) Chalcididae + Leucospidae + Eurytomidae; (4) Eulophidae: Eulophinae + Tetrastichinae + Entedoninae; and (5) Eupelmidae + Encyrtidae, Mymarommatoidea renders Chalcidoidea paraphyletic in our analyses; however, the taxon sample is too restricted to provide a robust hypothesis. Three previously unreported putative autapomorphies of Chalcidoidea were revealed: (1) presence of an exposed, triangular or diamond-shaped prosternum; (2) presence of a percurrent mesopleural sulcus anteriorly terminating in the acropleuron; and (3) presence of paired metapectal plates lateral to the metafurca.

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Metadaten
Author:Lars Krogmann, Lars Vilhelmsen
URN:urn:nbn:de:hebis:30-1130543
ISSN:1445-5226
Parent Title (English):Invertebrate systematics
Document Type:Article
Language:English
Date of Publication (online):2009/07/16
Year of first Publication:2006
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2009/07/16
Tag:character evolution; cladistic analysis; comparative anatomy; phylogenetic systematics
Volume:20
Page Number:60
First Page:615
Last Page:674
Note:
Signatur: SZ 5444
HeBIS-PPN:359201687
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 59 Tiere (Zoologie) / 590 Tiere (Zoologie)
Sammlungen:Sammlung Biologie / Weitere biologische Literatur (eingeschränkter Zugriff)
Licence (German):License LogoArchivex. zur Lesesaalplatznutzung § 52b UrhG