A FAUNAL ANALYSIS OF THE DROSOPHILIDS AT GENUS LEVEL CENTERING AROUND NEW GUINEA

概要

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The drosophilid fauna of New Guinea at genus level was compared with that of the other geographical regions of the World based on various kinds of similarity coefficients and two kinds of clustering methods, UPGA and WPGA. The phenograms obtained were evaluated by means of the cophenetic correlation coefficient (CPCC). The cophenetically reliable phenograms showing CPCC higher than 0.85 are obtained in the cases of similarity coefficients which do not include negative matches in their numerators, resulting that New Guinea is closest to S. Asia including Taiwan, with them Japan, Micronesia, and Africa being combined, and Europe and N. America compose a distinct cluster. In the cases of the similarity coefficients which involve negative matches in their numerators, the CPCCs tend to be less than 0.80 and the phenograms are also less acceptable biogeographically. It is suggested that 1) the similarity coefficients involving negative matches in numerators are better discarded from the faunal analysis, 2) UPGA is not always superior to WPGA in the faunal comparison, and 3) CPCC is highly significant for the evaluation of faunal phenograms.
1970-09-30