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Morphometric analysis of Mexican and South American populations of the Anastrepha fraterculus complex (Diptera: Tephritidae) and recognition of a distinct Mexican morphotype

Published online by Cambridge University Press:  09 March 2007

V. Hernández-Ortiz ,
J.A. Gómez-Anaya ,
A. Sánchez ,
B.A. McPheron  and
M. Aluja
V. Hernández-Ortiz*
Affiliation:
Instituto de Ecología A.C., Km 2.5 carretera antigua a Coatepec No. 351, Congregación El Haya, Apartado Postal 63, C.P. 91000, Xalapa, Veracruz, México
J.A. Gómez-Anaya
Affiliation:
Instituto de Ecología A.C., Km 2.5 carretera antigua a Coatepec No. 351, Congregación El Haya, Apartado Postal 63, C.P. 91000, Xalapa, Veracruz, México
A. Sánchez
Affiliation:
Instituto de Ecología A.C., Km 2.5 carretera antigua a Coatepec No. 351, Congregación El Haya, Apartado Postal 63, C.P. 91000, Xalapa, Veracruz, México
B.A. McPheron
Affiliation:
Department of Entomology, Pennsylvania State University, 501 ASI Building, University Park, PA 16802, USA
M. Aluja
Affiliation:
Instituto de Ecología A.C., Km 2.5 carretera antigua a Coatepec No. 351, Congregación El Haya, Apartado Postal 63, C.P. 91000, Xalapa, Veracruz, México
*
*Fax: +52 228 8187809 E-mail: hernanvi@ecologia.edu.mx
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Abstract

Discriminant function and cluster analyses were performed on 19 morphometric variables of the aculeus, wing and mesonotum to determine whether populations of Anastrepha fraterculus (Wiedemann) from different parts of Mexico could be distinguished from populations from South America., Samples were collected from seven localities across Mexico, two from Brazil, and one each from Colombia and Argentina. Results showed there were statistically significant differences between Mexican and South American populations with respect to the aculeus (tip length, length of serrated section, mean number of teeth) and wing (width of S-band and connection between S- and V-bands). The degree of morphological variation observed among Mexican populations was extremely low, and as a consequence, the Mexican populations were identified as a single morphotype by discriminant analysis. The ‘Andean morphotype’ consisting of the Colombian population, and the ‘Brazilian morphotype’ consisting of the two Brazilian populations plus the single Argentinian population were also distinguished. It was concluded that the macro-geographical morphotypes from Mexico, Colombia, and Brazil plus Argentina correspond to three distinct taxonomic entities. Comparisons of results with those obtained from behavioural, karyotypic, isozyme and DNA studies suggest that sufficient evidence now exists to name a new Mexican species from within the A. fraterculus complex. This will be done in a separate publication. A provisional key to the morphotypes of A. fraterculus studied is provided.

Type
Research Article
Information
Bulletin of Entomological Research , Volume 94 , Issue 6 , December 2004 , pp. 487 - 499
Copyright
Copyright © Cambridge University Press 2004

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