FIGURE 16 in The genus Pseudexechia Tuomikoski re-characterized, with a review of European species (Diptera: Mycetophilidae)

FIGURE 16. Normalized principal components analysis of 59 morphological measurements in 65 specimens of European Pseudexechia species. The species Pseudexechia latevittata Chandler & Blasco-Zumeta, 2001 is excluded due to too many missing values. Other missing values (0.9%) are replaced by averages for the species and sex. Position of taxa and sexes are displayed as centre of gravity (black circles) and range (convex hulls as shaded areas) on the F1xF2 factorial plane. —A. Correlation circle displaying individual measures on the F1xF2 factorial plane. Most measures are correlated to size along the F1-axis. Labels of individual measures are ordered and displayed at their vertical position along the F2-axis. —B. Histogram of eigenvalues. —C. Morphometric separation of the sexes. —D. Morphometric separation of the three European species groups; viz. the trisignata group, the canalicula group and the trivittata group. —E. Morphometric separation of European species. Included species are: the trisignata group: P. trisignata (Edwards, 1913), P. pectinacea (Ostroverkhova, 1979) and P. tuomikoskii, sp. n.; the canalicula group: P. canalicula (Johannsen, 1912), P. aurivernica Chandler, 1978, P. monica Kjaerandsen & Chandler, 2006, P. p a r a l l e l a (Edwards, 1925); and the trivittata group: P. trivittata (Staeger, 1840) and P. tristriata Stackelberg, 1969.