Naupactus xanthographus (Germar) species group (Curculionidae: Entiminae: Naupactini): a comprehensive taxonomic treatment

LANTERI, ANALÍA A.; DEL RÍO, M. GUADALUPE

JOURNAL OF NATURAL HISTORY

TAYLOR & FRANCIS LTD

Lugar: Londres; Año: 2017 p. 1557 - 1587

0022-2933

We undertake a taxonomic revision of Naupactus xanthographus(Germar 1824) (grape-fruit weevil) and the putative related speciesN. navicularis Boheman 1840, N. dissimilis Hustache 1947, N. mimicusHustache 1938, N. dissimulator Boheman 1840 and N. marvaldiae newspecies. This species group mainly differs from other Naupactus bythe presence of a pair of tubercles at the apex of the elytra. It rangesin Argentina, southern Brazil, Bolivia, Paraguay and Uruguay, in areasthat belong to the biogeographic provinces of Atlantic, Araucaria andParaná forests, Yungas, Chaco and Pampa. Naupactus xanthographusis broadly distributed in Argentina, mainly in the Pampean province,and it was introduced in central Chile, where it is considered a seriouspest of grapes and several fruit trees. The remaining species arepartially sympatric in the subtropical forests of southern Brazil, andN. dissimulator ranges along the gallery forests of Paraná andUruguay rivers, down to La Plata River. It has been reported damagingcitrus and ?yerba mate?, like N. navicularis and N. dissimilis. Thenew species N. marvaldiae ranges in southern Brazil and north-easternArgentina (Misiones), and differs from N. dissimulator, mainly bythe very short elytra, the apical tubercles welldeveloped in males andfemales, the broader front femora, and the different shape of theapex of the penis. The other four species are probably more closelyrelated and they separate from the pair N. dissimulator?N. marvaldiaebecause of the slightly widened front femora, well-developed corbelsof the hind tibiae, and short to indistinct nodulus of the spermatheca.