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35 results for “linear morphometrics”
TEXT-FIGURE 3. Scatterplots of morphometric measurements of Thecidellina leipnitzae sp. nov. Abbreviations: L, length; W, width; LDV, length of dorsal valve; T (max), maximal thickness; Lint, length of the interarea, Wint, width of hinge line or interarea. Relationships between ratios L/W and width, LDV/W and width, T(max)/W and width, Lint/W and width and Wint/W and width. Linear regression and regression coefficient (R²) indicated. The regression coefficient (R²) is indicated. N is the number of specimens measured. in Recent thecideide brachiopods from a submarine cave in the Department of Mayotte (France), northern Mozambique Channel
TEXT-FIGURE 3. Scatterplots of morphometric measurements of Thecidellina leipnitzae sp. nov. Abbreviations: L, length; W, width; LDV, length of dorsal valve; T (max), maximal thickness; Lint, length of the interarea, Wint, width of hinge line or interarea. Relationships between ratios L/W and width, LDV/W and width, T(max)/W and width, Lint/W and width and Wint/W and width. Linear regression and regression coefficient (R²) indicated. The regression coefficient (R²) is indicated. N is the number of specimens measured.
Figure 9 in Dealing with allometry in linear and geometric morphometrics: a taxonomic case study in the Leporinus cylindriformis group (Characiformes: Anostomidae) with description of a new species from Suriname
Figure 9. Wireframe visualization of allometric shape change along the least squares regression line of Procrustes coordinates on log centroid size. Grey landmarks represent the average configuration amongst all specimens, whereas black landmarks represent the approximate extreme of variation (1.2 log centroid size units) in the direction of the smallest specimens, which have proportionally larger heads and eyes.
Figure 1. Leporinus cylindriformis, MCZ 20430 in Dealing with allometry in linear and geometric morphometrics: a taxonomic case study in the Leporinus cylindriformis group (Characiformes: Anostomidae) with description of a new species from Suriname
Figure 1. Leporinus cylindriformis, MCZ 20430, holotype, 188.0 mm standard length; Brazil, Pará, Rio Xingu at Porto de Moz. Image © President and Fellows of Harvard College.
Figure 10 in Dealing with allometry in linear and geometric morphometrics: a taxonomic case study in the Leporinus cylindriformis group (Characiformes: Anostomidae) with description of a new species from Suriname
Figure 10. Wireframe visualization of variation along the allometrically corrected principal components one (PC1), two, and three from geometric morphometric analysis. Grey landmarks represent the configuration of the average specimen, black landmarks represent one approximate extreme of variation on that axis. The deformation on PC1 represents 0.07 units, that on PC2 represents 0.04 units, and that on PC3 represents 0.03 units. Percentages indicate the proportion of total variance amongst the Procrustes residuals explained by each axis.
Figure 7 in Dealing with allometry in linear and geometric morphometrics: a taxonomic case study in the Leporinus cylindriformis group (Characiformes: Anostomidae) with description of a new species from Suriname
Figure 7. Reduced major axis regression of principal component one (PC1) scores from traditional linear morphometrics on log standard length for species of Leporinus discussed in text. Trendline represents a universal regression that does not take species membership into account; tests for equivalence of slope and intercept as reported in Tables 2 and 3 estimate a separate regression line for each putative species.
Figure 12 in Dealing with allometry in linear and geometric morphometrics: a taxonomic case study in the Leporinus cylindriformis group (Characiformes: Anostomidae) with description of a new species from Suriname
Figure 12. Geographical distribution of examined specimens of Leporinus amazonicus, Leporinus apollo sp. nov., Leporinus cylindriformis, Leporinus niceforoi, Leporinus cf. niceforoi, and Leporinus sp. Some symbols represent more than one collection locality.
Figure 3 in Dealing with allometry in linear and geometric morphometrics: a taxonomic case study in the Leporinus cylindriformis group (Characiformes: Anostomidae) with description of a new species from Suriname
Figure 3. Leporinus apollo sp. nov., FMNH 116827, holotype, 111.1 mm standard length; Suriname, Saramacca, Coppename River, Sidonkrutu, sand island and channel.
Figure 8 in Dealing with allometry in linear and geometric morphometrics: a taxonomic case study in the Leporinus cylindriformis group (Characiformes: Anostomidae) with description of a new species from Suriname
Figure 8. Scatterplot of principal components one and two from geometric morphometric analysis without allometric correction for species of Leporinus discussed in text. Both axes show significant correlations with log centroid size.
Figure 11 in Dealing with allometry in linear and geometric morphometrics: a taxonomic case study in the Leporinus cylindriformis group (Characiformes: Anostomidae) with description of a new species from Suriname
Figure 11. Scatterplot of (A) principal components one and two and (B) principal components one and three from geometric morphometrics after allometric correction. Polygons represent convex hulls surrounding nominal species of Leporinus.
Figure 6 in Dealing with allometry in linear and geometric morphometrics: a taxonomic case study in the Leporinus cylindriformis group (Characiformes: Anostomidae) with description of a new species from Suriname
Figure 6. Scatterplot of principal component two (PC2) versus one from traditional linear morphometrics for species of Leporinus discussed in text. PC1 is an allometric vector describing size and shape variation, whereas PC2 is essentially size-free. Polygons indicate convex hulls.
Data from: Dealing with allometry in linear and geometric morphometrics: a taxonomic case study in the Leporinus cylindriformis group (Characiformes: Anostomidae) with description of a new species from Suriname
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Data from: Comparing phylogenetics and linear morphometrics to solve the generic assignment of Parabolinella? triarthroides Harrington (Trilobita, Olenidae)
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Figure 5 in Dealing with allometry in linear and geometric morphometrics: a taxonomic case study in the Leporinus cylindriformis group (Characiformes: Anostomidae) with description of a new species from Suriname
Figure 5. Radiograph of holotype of Leporinus cylindriformis, MCZ 20430, 188.0 mm standard length, showing position of 21 landmarks used in geometric morphometric analysis. Landmarks represent: (1) anterior limit of premaxilla; (2) dorsal tip of ascending process of premaxilla; (3) epiphyseal bar; (4) posterodorsal tip of supraoccipital; (5) origin of first dorsal-fin ray; (6) insertion of last dorsal-fin ray; (7) origin of adipose fin; (8) posterior extent of vertebral column and anterior of hypural plate, marked at midpoint of last vertebral centrum; (9) insertion of last anal-fin ray; (10) origin of first anal-fin ray; (11) pelvic-fin origin; (12) pectoral-fin origin; (13) ventral limit of joint between contralateral cleithra; (14) anguloarticular-quadrate joint; (15) anterior tip of dentary; (16) anterior limit of orbit; (17) dorsal limit of orbit; (18) posterior limit of orbit; (19) ventral limit of orbit; (20) joint between basioccipital and first vertebra of Weberian apparatus; (21) anterior limit of fifth vertebra (first vertebra not incorporated into Weberian apparatus and first bearing full sized pleural ribs). Image © President and Fellows of Harvard College.
Figure 4 in Dealing with allometry in linear and geometric morphometrics: a taxonomic case study in the Leporinus cylindriformis group (Characiformes: Anostomidae) with description of a new species from Suriname
Figure 4. Leporinus apollo sp. nov., MHNG 2673.002, paratype, 48.6 mm standard length; Suriname, Corantijn River, Kaw Falls (04°59′48.3″N, 57°37′49.5″W).
Figure 2 in Dealing with allometry in linear and geometric morphometrics: a taxonomic case study in the Leporinus cylindriformis group (Characiformes: Anostomidae) with description of a new species from Suriname
Figure 2. Leporinus sp., INPA 15405, 115.9 mm standard length; Brazil, Rondônia, Rio Ucupá at Ji Parana. Right of specimen photographed with image reversed to place head at left. Previously considered conspecific with Leporinus cylindriformis.
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