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2 October 2019 A Taxonomic Revision of the Cosmopolitan Leafhopper Subfamily Coelidiinae Dohrn Sensu Lato with a Historical Review of Attendant Taxa and Phylogeny (Hemiptera: Cicadellidae)
M. W. Nielson
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Abstract

In this revision, 19 major characters with 149 attendant character states among a maximum of 324 exemplars (genera and species) of 11 tribes assigned in the leafhopper subfamily Coelidiinae sensu lato are described, assessed and collated. All taxa were evaluated for their delineating taxonomic features. Results of these assessments are provided for the following taxonomic groups: tribes, type-genera, type-species and numerous supplemental genera and species across six biogeographical regions. A history of nomenclature usages and classifications are given to document the unstable systematics that has been nearly continuous from the time of inception to the present. A historical review of phylogeny of the subfamily Coelidiinae sensu lato is also provided.

A combined total of 74 character states delineated tribes in Coelidiinae sensu stricto from Macroceratogoniini sensu Dietrich and Equeefini sensu Theron and from each other. Twenty character states delineated Macroceratogoniini and tribes in Coelidiinae sensu stricto from each other. Twenty character states delineated Equeefini and tribes in Coelidiinae sensu stricto from each other. Twenty-one character states delineated Macroceratogoniini and Equeefini from each other. Thirteen character states delineated tribes in Coelidiinae sensu stricto from Macroceratogoniini + Equeefini and from each other. Tribes in Coelidiinae sensu stricto shared fewer diagnostic states with Macroceratogoniini (36%) than with Equeefini (76%), suggesting that tribes of Coelidiinae sensu stricto are collectively farther removed taxonomically and phylogenetically from Macroceratogoniini than they are from Equeefini.

Nine tribes originally assigned in Coelidiinae by the author are retained. Reassignment of Equeefini to Deltocephalinae is proposed. Provisional reassignment of Macroceratogoniini to Evacanthinae (=Nirvaninae) is proposed in view of its explicit delineation from tribes of Coelidiinae, sensu stricto. Lesinda McKamey formerly assigned in tribe Equeefini in Coelidiinae sensu lato is relegated herein to tribe Equeefini in Deltocephalinae. Gariesa Theron 1986b: 153 is a junior synonym of Mgenia Theron 1984a: 313 in the tribe Equeefini. Thagria triuncula Nielson is a replacement name for Thagria bidentata Xu & Kuoh from China, nec Thagria bidentata Nielson from Malaysia. The identity of the type-species of Coelidia Germar, Coelidia venosa Germar, is clarified with photos and comments. The dorsal connective of the aedeagus, applied previously to Coelidiinae sensu stricto, is redefined and renamed dorsal preatrial aedeagal apodeme. The phylogeny of the family Cicadellidae and particularly the subfamily Coelidiinae sensu lato remains unclear. It is proposed that the number of exemplars (genera and species) and character states be substantially increased in future analyses. Moreover, only known, monophyletic exemplars (genera) are recommended to avoid problematic, inferred phylogenetic relationship among tested family-group taxa.

M. W. Nielson "A Taxonomic Revision of the Cosmopolitan Leafhopper Subfamily Coelidiinae Dohrn Sensu Lato with a Historical Review of Attendant Taxa and Phylogeny (Hemiptera: Cicadellidae)," Transactions of the American Entomological Society 145(2), 297-351, (2 October 2019). https://doi.org/10.3157/061.145.0201
Published: 2 October 2019
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