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690 results for “Geometric morphometrics”
Figure 3 from: Ren J, Bai M, Yang X-K, Zhang R-Z, Ge S-Q (2017) Geometric morphometrics analysis of the hind wing of leaf beetles: proximal and distal parts are separate modules. ZooKeys 685: 131-149. https://doi.org/10.3897/zookeys.685.13084
Figure 3 - PLS analysis results. A Scatter plot of the PLS1 of two blocks B Shape changes associated with the first PLS axes of two blocks: each diagram shows the block change along the PLS1 in the positive or negative direction, corresponding to Figure 3A.
Fig. 8 in A practical, step-by-step, guide to taxonomic comparisons using Procrustes geometric morphometrics and user-friendly software (part B): group comparisons
Fig. 8. PC1–PC2 summary scatterplot of species-specific allometric predictions (66% of total allometric shape). As an example, the opposite extremes of the allometric trajectories of yellow-bellied marmots (fla) and woodchucks (mon) are shown (magnified five times) using wireframes and thin plate spline deformation grids, drawn in TPSRelw by 'warping' variation along the regression lines in the PC1–PC2 subspace.
Fig. 6 in A practical, step-by-step, guide to taxonomic comparisons using Procrustes geometric morphometrics and user-friendly software (part A): introduction and preliminary analyses
Fig. 6. Box and jitter plot of species mandible CS. Red circles mark potential outliers. Species names are abbreviated as shown in Table 2.
FIGURE 10 in Morphological variation during post-embryonic development in the centipede Lithobius melanops: traditional and geometric morphometrics approaches
FIGURE 10 Shape variation of (A) The forcipular apparatus; (B) The cephalic capsule; and (C) The ultimate leg among epimorphic groups was performed by Canonical Variate Analyses (CVA) [circle: black – agenitalis, white – maturus; rectangles: black – praematurus male, white – praematurus female (in the case of the forcipular aparatus) and praematurus (both sexes in the case of the cephalic capsule and the ultimate leg)]. Thin plate spline deformation grids and vector positions illustrate the shape variation pattern among analyzed groups.
FIGURE 12 in Identifying tooth position of isolated teeth of sparassodonts (Mammalia: Metatheria) using geometric morphometrics
FIGURE 12. Plot of the first two canonical variates (CVs) of the reduced taxon (no Tiupampa taxa, borhyaenids, or thylacosmilids), trigon-only discriminant analysis with tooth locus coded by symbol and incorrectly-classified specimens uncolored. Convex hulls represent morphospace occupied by each tooth locus.
FIGURE 9 in Geometric morphometrics in ammonoids based on virtual modelling
FIGURE 9. Morphospace formed by PC1 and PC3 from this study showing the location for each specimen in Table 3. The virtual whorl cross-sections for extreme values are illustrated below the axis of each PC.
FIGURE 8 in Geometric morphometrics in ammonoids based on virtual modelling
FIGURE 8. Morphospace formed by the first two PCs found in this study showing the location for each specimen in Table 3. The virtual whorl cross-sections of the PC-score values are illustrated below the axis. Combinations of these PC values are shown in the extremes of the morphospace. Evolute ammonoids are confined to a region to the left, this could be caused by a lack of subevolute specimens in the original sample.
FIGURE 7 in Geometric morphometrics in ammonoids based on virtual modelling
FIGURE 7. Transformations from negative to positive values in PC3. A) Semilandmark configuration at PC3=-0.3 showing the x (red) and y (blue) vectorial components towards PC3 positive values. B) Semilandmark configuration at PC3=0.3 obtained from the transformation in A. C). Translations for each semilandmark in the x-axis for PC3. Empty bars illustrate the closest covariation pattern from Figure 4; in this case, there is a weak adjustment to a compression of the whorl cross-section. D) Translations for each semilandmark in the y-axis for PC2. Empty bars illustrate the closest covariation pattern from Figure 4; in this case, a weak adjustment to a compression of the whorl cross-section. Note that most of the variation is in semilandmarks 3, 6, 12, and 15 that define the vertical location of the whorl width with respect to the whorl cross-section.
FIGURE 6 in Geometric morphometrics in ammonoids based on virtual modelling
FIGURE 6. Transformations from negative to positive values in PC2. A) Semilandmark configuration at PC2=-0.3 showing the x (red) and y (blue) vectorial components towards PC2 positive values. B) Semilandmark configuration at PC2=0.3 obtained from the transformation in A. C). Translations for each semilandmark in the x-axis for PC2. Empty bars illustrate the closest covariation pattern from Figure 4; in this case, a localized compression in the peripheric landmarks (2 to 4 and 11 to 13). D) Translations for each semilandmark in the y-axis for PC2. Empty bars illustrate the closest covariation pattern from Figure 4; in this case, an elongation with an increase in the involution degree of the whorl cross-section.
Fig. 1 in Geometric morphometric analysis of cyclical body shape changes in color pattern variants of Cichla temensis Humboldt, 1821 (Perciformes: Cichlidae) demonstrates reproductive energy allocation
Fig. 1. Configuration of landmarks (red dot within yellow circles) as applied to all color pattern variation (CPV) grades of Cichla temensis. (1) the anterior point of the skull; (2) the anterior edge of the base of the first dorsal spine; (3) the center of the base of the 10 th dorsal spine; (4) the base of the first long ray of the second dorsal fin; (5) the base of the 9 th ray of the second dorsal fin; (6) the posterior point of termination of the second dorsal fin; (7) the posterior base of the anal fin; (8) the base of the 7th anal fin ray; (9) the anterior insertion of the anal fin; (10) the cloaca; (11) the ventral termination of the scale row emanating from the insertion of the 10th dorsal spine; (12) the ventral termination of the scale row emanating from the anterior point of the insertion of the pelvic fin.
Fig. 2 in Geometric morphometric analysis of cyclical body shape changes in color pattern variants of Cichla temensis Humboldt, 1821 (Perciformes: Cichlidae) demonstrates reproductive energy allocation
Fig. 2. Thin-plate-spline deformation grids depicting (a) overall body shape differences between extremes of CPV grades (magnified 3x); (b) the increase in area at the bases of the second dorsal and anal fins between extremes of CPV grades (magnified 3x).
Fig. 4 in Geometric morphometric analysis of cyclical body shape changes in color pattern variants of Cichla temensis Humboldt, 1821 (Perciformes: Cichlidae) demonstrates reproductive energy allocation
Fig. 4. Height to length ratio of color pattern variants of Cichla temensis. The average height/SL ratio increased with CPV grade from a low of 0.2694 for CPV Grade 1 (paca), 0.2725 for CPV Grade 2, 0.2771 for CPV Grade 3 and 0.2822 for CPV Grade 4 (açu).
Fig. 7 in A geometric morphometric study of the wing shapes of Pieris rapae (Lepidoptera: Pieridae) from the Qinling Mountains and adjacent regions: An environmental and distance-based consideration
Fig. 7. Correlations between the geographical distances and the Euclidean distances between the mean values of the forewing shapes (strong positive correlation, P <0.001, r = 0.58) and the hind wing shapes (strong positive correlation, P <0.001, r = 0.78).
Fig. 15 in Revision of the genus complex Gibbula: an integrative approach to delineating the Eastern Mediterranean genera Gibbula Risso, 1826, Steromphala Gray, 1847, and Phorcus Risso, 1826 using DNA-barcoding and geometric morphometrics (Vetigastropoda, Trochoidea)
Fig. 15 Phorcus articulatus (Lamarck 1822). a PCA plot of PC1 vs. PC2 for genus Phorcus. Single specimen of Phorcus articulatus separates from all other species. b Representative specimen of Ph. articulatus from this study. c One syntype of Ph. articulatus (INVE 51532). Scale bars 5 mm
Fig. 4 in Does size matter for horny beetles? A geometric morphometric analysis of interspecific and intersexual size and shape variation in Colophon haughtoni Barnard, 1929, and C. kawaii Mizukami, 1997 (Coleoptera: Lucanidae)
Fig. 4 Box plots and deformation grids showing size variations and shape deformations in Colophon beetles: female Colophon, male C. haughtoni and male C. kawaii. Size was measured as natural log transformed centroid size (LnCS). Deformation grids show the shape changes related to size from the smallest to the largest individuals. Values in parentheses are the magnification applied to improve visualisation of shape deformations
Fig. 13 in Revision of the genus complex Gibbula: an integrative approach to delineating the Eastern Mediterranean genera Gibbula Risso, 1826, Steromphala Gray, 1847, and Phorcus Risso, 1826 using DNA-barcoding and geometric morphometrics (Vetigastropoda, Trochoidea)
Fig. 13 Phorcus mutabilis (Philippi, 1846). a PCA plot of PC1 vs. PC3 from genus Phorcus. Phorcus mutabilis (olive) splits into two morphotypes: one from Croatia and one from Crete. b Representative specimen of Ph. mutabilis (Croatia) from this study. c Representative specimen of Ph. mutabilis (Crete) from this study. d Specimen (black arrow) showing Ph. richardi morphology, but Ph. mutabilis COI barcode. From this study. Scale bars 5 mm
Fig. 9 in Revision of the genus complex Gibbula: an integrative approach to delineating the Eastern Mediterranean genera Gibbula Risso, 1826, Steromphala Gray, 1847, and Phorcus Risso, 1826 using DNA-barcoding and geometric morphometrics (Vetigastropoda, Trochoidea)
Fig. 9 Steromphala rarilineata (Michaud, 1829). a PCA plot of PC1 vs. PC3 from genus Steromphala. Steromphala rarilineata (violet) is separated but very near St. adriatica and St. divaricata. b Representative specimen of St. rarilineata from this study. Scale bar 5 mm
Fig. 7 in Revision of the genus complex Gibbula: an integrative approach to delineating the Eastern Mediterranean genera Gibbula Risso, 1826, Steromphala Gray, 1847, and Phorcus Risso, 1826 using DNA-barcoding and geometric morphometrics (Vetigastropoda, Trochoidea)
Fig. 7 Steromphala adansonii (Payraudeau 1826). a PCA plot of PC1 vs. PC2 of genus Steromphala. Single specimen of Steromphala adansonii (black) clusters near St. umbilicaris. b Representative specimen of St. adansonii from this study. Scale bar 5 mm
Fig. 6 in Revision of the genus complex Gibbula: an integrative approach to delineating the Eastern Mediterranean genera Gibbula Risso, 1826, Steromphala Gray, 1847, and Phorcus Risso, 1826 using DNA-barcoding and geometric morphometrics (Vetigastropoda, Trochoidea)
Fig. 6 Steromphala umbilicaris (Linnaeus, 1758) and Steromphala nebulosa (Philippi, 1848). a PCA plot of PC1 vs. PC2 of genus Steromphala. Steromphala umbilicaris (green) separates well from all other species. There is no overlap between specimens from this study and the type material. One individual (Linné 24) nests within St. adriatica. Steromphala nebulosa (grey) nests at the edge of St. umbilicaris. b Representative specimen of St. umbilicaris from this study. c Representative specimen of St. nebulosa from this study. d: Designated lectotype for St. umbilicaris located at LSL (LSL.504). Scale bars 5 mm
Fig. 8 in Revision of the genus complex Gibbula: an integrative approach to delineating the Eastern Mediterranean genera Gibbula Risso, 1826, Steromphala Gray, 1847, and Phorcus Risso, 1826 using DNA-barcoding and geometric morphometrics (Vetigastropoda, Trochoidea)
Fig. 8 Steromphala adriatica (Philippi, 1844). a PCA plot of PC1 vs PC2 of genus Steromphala. Steromphala adriatica (red) is separated from all but St. divaricata. One individual of Steromphala umbilicaris (Linné
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