Análisis multivariado y congruencia taxonómica en la delimitación de los géneros Asynonychus Crotch y Aramigus Horn (Coleoptera: Curculionidae)

LANTERI, ANALÍA A.; DÍAZ, NORMA B.; ORTIZ JAUREGUIZAR, EDGARDO

REV. ASOC. CS. NAT. LITORAL

Asociación de Cs. Naturales del Litoral

Lugar: Santo Tomé, Santa Fe, Argentina; Año: 1989 vol. 20 p. 41 - 56

0325-2809

The main objectives of this paper are to apply multivariate analysis (cluster analysis, minimun spanning tree and principal component analyses) to test the hypothesis that Asynonychus Crotch 1867 and Aramigus Horn 1876 are two independent genera. We compiled a data matrix of 9 species of Asynonychus s. lato (Asynonychus sensu stricto plus Aramigus) by 50 characters (16 from external morphology, 12 morphometrics, 11 from the scale-dressing and 11 from the female genitalia). To evaluate the contribution of the different kinds of characters and the congruence between classifications the original matrix was subdivided into submatrices. We applied the strict consensus method and the indeces CI (c) and CI (R1) by Rohlf (1982). The results obtained suggest that Asynonychus s. stricto and Aramigus are independent genera. The first genus includes the species Aramigus conirostris (Hustache 1947) and the A. durius species group. The second genus includes the species Asynonychus godmanni Crotch 1867 and A. cervinus (Boheman 1840). The relationships among the species of the A. durius group vary according to the kind of characters considered. The incongruence between the classifications obtained from the external morphology versus the female genitalia, is probably due to the presence of homoplasies and to the different evolutionary rates of these character sets.