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What is the Leaf Beetle Calligrapha scalaris (Leconte)?

AutorGómez-Zurita, Jesús
Fecha de publicaciónfeb-2015
CitaciónBreviora 541: 1-19 (2015)
ResumenSince the description of Calligrapha scalaris (LeConte, 1824), a leaf beetle reported as an occasional serious pest of American elm, this taxon has been affected by remarkable taxonomic confusion. Most authors have invoked their particular and generally flawed concept of C. scalaris (LeConte) without reference to John E. LeConte's type material at the Museum of Comparative Zoology (Cambridge, Massachusetts). In this study, I have revised the series for C. scalaris (LeConte) conserved as part of J. LeConte and G. Horn collections, and confirmed that it includes as many as nine Calligrapha species, most of them lacking an association with Ulmus. Among these specimens, a couple of them from Texas are recognized as generally consistent with the original description and the only potentially elm-feeding animals. Thus, despite legitimate doubts for their availability to J. LeConte at the moment of the species description, they are designated here as neo- and paraneotypes, respectively, in an effort to maximize taxonomic stability. The species is redescribed on the basis of the neotype and diagnosed from all other species in this group, defined here as the “Calligrapha scalaris” group, including a provisional identification key for 14 species and for specimens conforming to the respective types. Finally, the study of syntype material from the Museum für naturkunde (Berlin) of C. multiguttis (Stål, 1865), an early synonym of C. scalaris (LeConte), allowed recognition of several other Calligrapha taxa affected by this synonymy, including C. ignota Brown, C. knabi Brown, and C. tiliae Brown ( =  Chrysomela multiguttis Stål [pars] nov. syn.).
Versión del editorhttp://doi.org/10.3099/MCZ11.1
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