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Character correlations in 50 characters of integumental sculptures derived from 85 taxa or OTU’s of the genus Andrena (Hymenoptera, Andrenidae) of Japan were analyzed by factor analysis with varimax r...otation. Nine common factors were extracted explaining 73.08 percent of the total variance among the characters. Nine character associations affected by the common factors seemed structurally related. The associations were assumed to be the following indices: the sparseness of punctures on the thorax, the development of the pronotal suture or angle, the development of tessellation on the metasoma, the rough-ness of the integument, the development of punctation on the clypeus, the appearance of wrinkles on the lateral portion of the thorax, the appearance of spines on the hind femur, the distinctness of the facial fovea, and the development of punctation on the metasomal terga.show more
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