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1 April 2011 Comparison of Ultrastructure among Sibling Species of Ostrinia (Lepidoptera: Crambidae) from China
Zhaofu Yang, Yalin Zhang
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Scanning electron microscopy on the ultrastructure of scales on the forewings and labial palpi suggests species-diagnostic differences among six sibling species of the genus Ostrinia Hübner. Among four species with small mid-tibiae, O. furnacalis (Guenée) and O. nubilalis (Hübner) show similar ultrastructure of the distal forewing scales, which is distinctly different from that of O. orientalis Mutuura and Munroe and O. dorsivittata (Moore). The diameter of windows between longitudinal ridges and cross ribs of forewing scales in O. dorsivittata is the largest among examined species, and clearly different from that in the other three small midtibiae species. Scales of the labial palpi of O. orientalis have indistinct vestigial windows; windows of O. nubilalis are more numerous and larger than in the other three small mid-tibiae species. Among two species with massive mid-tibiae, window diameter of forewing scales is larger in O. zealis (Guenée) than in O. scapulalis (Walker). Moreover, the number and diameter of windows in scales of the labial palpi differs between these two species. In addition to other known morphological differences, these ultrastructural differences provide further evidence that closely related Ostrinia species are distinct.

© 2011 Entomological Society of Canada
Zhaofu Yang and Yalin Zhang "Comparison of Ultrastructure among Sibling Species of Ostrinia (Lepidoptera: Crambidae) from China," The Canadian Entomologist 143(2), 126-135, (1 April 2011).
Received: 31 May 2010; Accepted: 1 September 2010; Published: 1 April 2011

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