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Item Description Kaneshiro, Kenneth Y. en_US Kambysellis, Michael P. en_US 2008-06-05T07:10:19Z 2008-06-05T07:10:19Z 1999-04 en_US
dc.identifier.citation Kaneshiro KY, Kambysellis MP. 1999. Description of a new allopatric sibling species of Hawaiian picture-winged Drosophila. Pac Sci 53(2): 208-213. en_US
dc.identifier.issn 0030-8870 en_US
dc.description.abstract A new picture-winged Hawaiian Drosophila species from the islands of Kaua'i and O'ahu that is morphologically indistinguishable from Drosophila grimshawi Oldenberg from the Maui Nui islands is described, based on differentiation in ecological, behavioral, cytological, and molecular characters as well as ultrastructural features of the chorion. The new species, D. craddockae, and D. grimshawi represent the first clear case of an allopatric sibling species pair among Hawaiian Drosophilidae (i.e., there is strong evidence for a profound set of intrinsic, genetically determined differences that are not easily diagnosable by the usual morphological methods). Ecologically, D. craddockae is a strict specialist, with oviposition restricted to the decaying bark of Wikstroemia. Drosophila grimshawi, on the other hand, is a generalist that breeds in the decaying parts of 10 families of plants. Data from cytological, behavioral, and molecular analyses are consistent with the geological evidence that species on the older islands are usually more ancestral than those that evolved on the younger islands. Thus, although long-standing ecological theory states that specialization is a derived condition, the biological and genetic evidence all indicate that specialism in D. craddockae is the ancestral condition and that generalism evolved in D. grimshawi on Maui Nui as a derived trait. en_US
dc.language.iso en-US en_US
dc.publisher University of Hawai'i Press en_US
dc.title Description of a New Allopatric Sibling Species of Hawaiian Picture-Winged Drosophila en_US
dc.type Article en_US
dc.type.dcmi Text en_US

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