FIGURE 2 in Two new species of Pyrgulopsis Call & Pilsbry, 1886 (Mollusca: Caenogastropoda: Hydrobiidae) from springs in the Rio Grande watershed in Texas

FIGURE 2. Shell morphometric analyses of shell shape of P. metcalfi, P. harrymilleri sp. nov, and P. rubra, sp. nov. Oversize black markers indicate centroids for each species. Colored ellipses reflect 95% concentrations. A. Principal Component analysis illustrating PC1 compared to PC2. MANOVA and subsequent post-hoc comparisons support significant differences (p <0.001) in shape among all three species. Hypothetical shell morphologies of the PCA axis extremes are presented as a visual representation of the shape difference along each axis (based on visualization using tpsRelw 3.2). B. Canonical Variates Analysis illustrating CVA1 compared to CVA2. In both comparisons, P. rubra is more distinctive in shape than P. metcalfi and P. harrymilleri.