Ein weiteres Zwillingsarten-Paar mitteleuropaischer Sesiiden: Chamaesphecia tenthrediniformis (, 1775) und Chamaesphecia empiformis (Esper, 1783) . (Lepidoptera, Sesiidae)

Naumann, CM.; Schroeder, D.

Zeitschrift der Arbeitsgemeinschaft Oesterreichischer Entomologen 32(1-2): 29-46


ISSN/ISBN: 0375-5223
Accession: 020950898

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Studies on the host specificity of phytophagous insects of Euphorbia esula and E. cyparissias (Euphorbiaceae) have shown that there are 2 sympatric species of the C. empiformis group (Lepidoptera, Sesiidae) in lower Austria. Both are different from Chamaesphecia hungarica (Tomala, 1901). Although the adults of the 2 spp. cannot be distinguished with certainty by external characters, differences were found in the size of the eggs, in the number of hooks on the false legs of the larvae and in the bionomics of the 2 spp. Since the original type specimens of S. tenthrediniformis Denis et Schiffermueller , 1775, were lost, a neotype had to be fixed, which is deposited in the Museum of Natural History (Vienna). A syntype specimen of S. empiformis Esper, 1783, which in the current literature is placed as a subjective synonym of S. tenthrediniformis Denis et Schiffermuller , 1775, was found in the cell. Gerning in the Staedtisches Museum Wiesbaden. A lectotype was selected. C. tenthrediniformis Denis et Schiffermuller , 1775 is defined as the species living on E. esula; the species feeding on E. cyparissias, which is more widely distributed in central Europe, has to be named C. empiformis (Esper, 1783). Similar cases of sibling species have recently been discovered by Kralicek (1966) and Kralicek et Povolny (1974,1977). Further studies of the bionomics and host specificity of Sesiidae may reveal additional cases of sibling species in this group.