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Title: DIABROTICA CALCHAQUI A NEW SPECIES OF LUPERINI (COLEOPTERA: CHRYSOMELIDAE: GALERUCINAE) FROM ARGENTINA

Author
item WALSH, CABRERA
item CABRERA, NORA

Submitted to: Annals of the Entomological Society of America
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 5/20/2004
Publication Date: 8/20/2004
Citation: Ann. Entomol. Soc. Am.

Interpretive Summary: The new species D. calchaqui is described and illustrated based on specimens collected from Cachi, Salta Province, Argentina. This new species is assigned to the Diabrotica virgifera group, subtribe Diabroticina, tribe Luperini, which isthe same group as the corn rootworms that are severe pests of maize in North America. Diabrotica calchaqui is recognized by the combined characters of elytra green with yellow vittae in some specimens reduced to 2 or 3 spots, humeral plicae subparallel, elytral sulcus sometimes obsolete, internal sac of median lobe with five sclerites. Adults have been found associated to cultivated Cucurbitaceae and wild Asteraceae flowers. We are studying the biology of this species in order to compare it with the known biology of the North American pest species, which has proven up to now to be quite different to the South American species.

Technical Abstract: The new species D. calchaqui is described and illustrated based on specimens collected from Cachi, Salta Province, Argentina. This new species is assigned to the Diabrotica virgifera group, subtribe Diabroticina, tribe Luperini. Diabrotica calchaqui is recognized by the combined characters of elytra green with yellow vittae in some specimens reduced to two or three spots, humeral plicae subparallel, elytral sulcus sometimes obsolete, internal sac of median lobe with five sclerites. Differences between D. calchaqui with D. porracea Harold, D. tumidicornis Erichson, D. mapiriensis Krysan and Smith, and D. fulvofasciata Jacoby, of similar morphology, are also discussed. Adults have been found associated to cultivated Cucurbitaceae and wild Asteraceae flowers.