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    The fossil crown wasp Electrostephanus petiolatus Brues in Baltic amber (Hymenoptera, Stephanidae): designation of a neotype, revised classification, and a key to amber Stephanidae

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    Electrostephanus 2008.pdf (864.3Kb)
    Issue Date
    2008-12-17
    Author
    Engel, Michael S.
    Ortega-Blanco, Jaime
    Publisher
    Pensoft Publishers
    Type
    Article
    Is part of series
    ZooKeys;4: 55-64
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    Abstract
    The fossil crown wasp Electrostephanus petiolatus Brues comb. rev. (Stephanidae, Electrostephaninae) is redescribed from a single male preserved in middle Eocene Baltic amber. The holotype was lost or destroyed around the time of World War II and subsequent interpretations of its identity have been based solely on the brief descriptive comments provided by Brues in his original account. The new specimen matches the original description and illustration provided by Brues in every detail and we hereby consider them to be conspecific, selecting the specimen as a neotype for the purpose of stabilizing the nomenclature for this fossil species. This neotype exhibits a free first metasomal tergum and sternum, contrary to the assertion of previous workers who indicated these to be fused. Accordingly, this species does indeed belong to the genus Electrostephanus Brues rather than to Denaeostephanus Engel & Grimaldi (Stephaninae). Electrostephanus petiolatus is transferred to a new subgenus, Electrostephanodes n. subgen., based on its elongate pseudopetiole and slender gaster, but may eventually warrant generic status as the phylogenetic placement of these fossil lineages continues to be clarified. A revised key to the Baltic amber crown wasps is provided.
    URI
    http://hdl.handle.net/1808/5622
    ISSN
    1313-2989
    Collections
    • Biodiversity Institute & Natural History Museum Scholarly Works [305]
    • Ecology & Evolutionary Biology Scholarly Works [1526]
    Citation
    ZooKeys 4: 55-64

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    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

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