Andrena fratella, WARNCKE, 1968

Arncke, 2021, Taxonomic re-evaluation of Andrena cyanomicans PÉREZ, 1895, A. fratella WARNCKE, 1968, A. maderensis WARNCKE, 1969, A. mirna WARNCKE, 1969, A. notata WARNCKE, 1968, and A. portosanctana WARNCKE, 1969 (Hymenoptera, Anthophila), Linzer biologische Beiträge 53 (2), pp. 631-698 : 681

2. Andrena fratella , A. cyanomicans ( Fig. 34 )

For females, only seven of the 18 parameters could be used for the PCA. All other morphometric parameters were excluded because of insufficient correlation values. Andrena fratella and A. cyanomicans show a significant clustering separated on the first axis, influenced by all parameters. The value of explained variance is high (64.2%). In the males, eight parameters could be used for PCA. The clusters of A. fratella and A. cyanomicans are close to each other, with slight overlap. Again, the values of the explained variance are high on the first axis (54.7 %). The values for the males of A. fratella vary more than those of A. cyanomicans .

Figures

Fig. 34: PCA of seven morphometric parameters (females) and 8 parameters (males). Brown dot = A. fratella; blue dot: A cyanomicans. Abbreviations of biplot parameters see Table 1.