Journal
ZOOTAXA
Volume 4908, Issue 4, Pages 505-514Publisher
MAGNOLIA PRESS
DOI: 10.11646/zootaxa.4908.4.4
Keywords
Chironominae; new species; non-biting midges; palaeoecology; Tanytarsini; taxonomy
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Stempellinella gilkai sp. nov., a non-biting midge of the subfamily Chironominae, tribe Tanytarsini, from the Eocene is described based on the adult male. This study provides a comparison of significant characters to delimit fossil Stempellinella and discusses key features of antenna and hypopygium. A comparative analysis of extinct and extant Stempellinella representatives led to an amendment of the current generic diagnosis, with notes on the genus' paleoecology and species richness during the Eocene.
Stempellinella gilkai sp. nov., an Eocene non-biting midge of the subfamily Chironominae, tribe Tanytarsini is described on the basis of the adult male. This is the sixth fossil representative of the genus and the fifth described from Baltic amber (similar to 40-45 Ma). The species displays a set of morphological characters typical of the genus. To facilitate a delimitation of fossil Stempellinella, a comparison of the most significant characters is provided. The key features of antenna and hypopygium are discussed in detail. A comparative analysis of both extinct and extant Stempellinella representatives allowed to perform an amendment of the current generic diagnosis. Notes on the genus' palaeoecology and species richness during the Eocene are also included.
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