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609 results for “morphometric analysis”
Fig. 4 in Morphometric Analysis of Dineutus emarginatus (Say) (Coleoptera: Gyrinidae): Subspecies Designation Reconsidered
Fig. 4. Component scores of the first two components from the Principal Components Analysis for male Dineutus emarginatus (n 5 45);, central to southern Florida; ', north of central Florida; X, Dineutus e. floridensis paratype.
Fig. 3 in Morphometric Analysis of Dineutus emarginatus (Say) (Coleoptera: Gyrinidae): Subspecies Designation Reconsidered
Fig. 3. Dorsal habitus (semi-diagrammatic) of protibia of Dineutus, illustrating measurement points (abbreviations are given in Materials and Methods).
Integrative taxonomic analysis to reveal the species status of Bombus flavidus, combining COI and nuclear sequencing, wing morphometrics and secretions used for mate attraction as well as patterns of color polymorphism
<p>Bumble bees, due to their morphological monotony and color diversity, have presented difficulties with species delimitation. Recent bumble bee declines have made it ever more imperative to resolve the status of species to address conservation concerns. Some of the taxa found to be most threatened are the often-rare socially parasitic bumble bees, which have additional trophic requirements. Among the socially parasitic bumble bees,<i> Bombus flavidus</i> Eversmann has contentious species status. While multiple separate species allied with <i>Bombus flavidus</i> have been suggested, until recently, recognition of two species, a Nearctic <i>Bombus fernaldae</i> (Franklin) and Palearctic <i>B. flavidus,</i> was favoured. Limited genetic data, however, suggested that even these could be a single widespread species, <i>B. flavidus</i>. We addressed the species status of this lineage using an integrative taxonomic approach, combining <i>COI</i> and nuclear sequencing, wing morphometrics and secretions used for mate attraction. We also explore patterns of color polymorphism that have previously confounded taxonomy in this lineage. Our results support the conspecific status of <i>Bombus fernaldae</i> and <i>Bombus flavidus,</i> however, sampling specimens from across the range of these two taxa revealed a distinct population within this broader species confined to eastern North America. This makes the distribution of the social parasite <i>B. flavidus</i> the broadest of any bumble bee, broader than the known distribution of any non-parasitic bumble bee species. Analysis of color phenotypes revealed that color polymorphisms are retained across the range of the species, but may be influenced by local mimicry complexes. Following these results, <i>Bombus flavidus</i> Eversmann, 1852<i> </i>is synonymized with <i>Bombus fernaldae </i>(Franklin, 1911) <b>syn. nov.</b> and a subspecific status, <i>Bombus flavidus </i><i>appalachiensis</i> <b>ssp. nov.</b>, is assigned to the distinct lineage ranging from the Appalachians to the eastern boreal regions of the United States and far southeastern Canada.</p>
Morphometric analysis of the foramen magnum in sex determination: An additional 3DCT study from Nepal on a larger sample
<p><strong>Background</strong>: Determination of sex of the skeletal remains plays a vital part in the identification of an individual. This study is focused on the morphometric measurement of the foramen magnum region and examining the accuracy of sexual dimorphism in the Nepalese population. </p> <p><strong>Methods</strong>: Measurements were obtained from 3D computed tomography (CT) scan of 261 Nepalese adult cranial bases with known age and sex. Length and breadth of the foramen magnum, length and breadth of right and left occipital condyles and maximum and minimum intercondylar distance were measured on the base of the skull CT images.</p> <p><strong>Results</strong>: <span>The mean values for all parameters were higher in males than females except for the maximum intercondylar distance.</span> Sex prediction done with discriminant function scores could classify the skull with an overall accuracy of 70.5%.</p> <p><strong>Conclusions</strong>: It can be concluded from the results that the morphometric study of the foramen magnum is not suitable for sex determination in the Nepalese population.</p>
FIGURE 7 in Taxonomic revision of Cypridopsis silvestrii comb. nov. (Ostracoda, Crustacea) from Patagonia, Argentina with morphometric analysis of their intraspecific shape variability and sexual dimorphism
FIGURE 7. Nonmetric Multidimensional Scaling (n-MDS) plot for male and female outlines, normalized for area from ET lake. Inset shows superposition of the virtual mean shape outline of males (light blue) and females (black).
FIGURE 5. Cypridopsis silvestrii comb. nov. A in Taxonomic revision of Cypridopsis silvestrii comb. nov. (Ostracoda, Crustacea) from Patagonia, Argentina with morphometric analysis of their intraspecific shape variability and sexual dimorphism
FIGURE 5. Cypridopsis silvestrii comb. nov. A. Hemipenis (UNC-PMIC 160 male). B. T1 (UNC-PMIC 153 ES female). C. Lpp (UNC-PMIC 161 male). D. Rpp (UNC-PMIC 161 male). E Zenker organ (UNC-PMIC 160 male). F. T2 (UNC-PMIC 153 ES female). G. Genital hooks (UNC-PMIC 154 ES female). H. T3 (UNC-PMIC 153 ES female). I.UR (UNC-PMIC 154 ES female). Scale bar: 100 µm.
FIGURE 1 in Taxonomic revision of Cypridopsis silvestrii comb. nov. (Ostracoda, Crustacea) from Patagonia, Argentina with morphometric analysis of their intraspecific shape variability and sexual dimorphism
FIGURE 1. Geographic location of the surveyed lakes. The upper left map shows Argentina with the Patagonian region in dark grey. The lower left map shows the sampled region with the four surveyed areas (black boxes), which correspond to the regions A, B, C, and D. Grey polygons correspond to water bodies (surveyed in black). The legends indicate the altitude in meters above sea level (masl) based on a digital elevation model (DEM; source www.earthexplorer.usgs.gov.gov), where the upper (A and B), and lower (C and D) panels share the same scale.
FIGURE 2. Cypridopsis silvestrii comb. nov. A in Taxonomic revision of Cypridopsis silvestrii comb. nov. (Ostracoda, Crustacea) from Patagonia, Argentina with morphometric analysis of their intraspecific shape variability and sexual dimorphism
FIGURE 2. Cypridopsis silvestrii comb. nov. A ES female RV external view (UNC-PMIC 149). B ET female RV external view (UNC-PMIC 153). C ET male RV external view (UNC-PMIC 158). D–E ES female LV external view (PMIC 148). F ET male LV external view (UNC-PMIC 158), G ET female Cp dorsal view (UNC-PMIC 154). H ET male Cp dorsal view (UNC- PMIC 159). I–K ES female RV internal view (PMIC 149). L–N ES female LV internal view (UNC-PMIC 148). O ET female Cp ventral view (UNC-PMIC 155). P ETC RV external view (UNC-PMIC 162). Q ETC LV internal view (UNC-PMIC 163). R He female LV internal view (UNC-PMIC 164). Scale bar= 300 µm; E= 50 µm and I, K, L, N= 100 µm.
FIGURE 9 in Taxonomic revision of Cypridopsis silvestrii comb. nov. (Ostracoda, Crustacea) from Patagonia, Argentina with morphometric analysis of their intraspecific shape variability and sexual dimorphism
FIGURE 9. Boxplots showing carapace length (a), Height (b) and H:L (c) of ETf, ETm, ETC, and ES populations. The line within the box marks the median; the lower and upper boundaries of the box indicate the 25th and 75th percentiles, respectively. Error bars above and below the box indicate the 90th and 10th percentiles, respectively, and black points indicate outliers.
FIGURE 6 in Taxonomic revision of Cypridopsis silvestrii comb. nov. (Ostracoda, Crustacea) from Patagonia, Argentina with morphometric analysis of their intraspecific shape variability and sexual dimorphism
FIGURE 6. Nonmetric Multidimensional Scaling (n-MDS) plot showing shape variability (valve outlines were normalized for area) of extant and subfossil populations, with superimposition of reconstructed mean shape outline of each population.
Supplementary material 1 from: Rakotonirina JC, Csősz S, Fisher BL (2016) Revision of the Malagasy Camponotus edmondi species group (Hymenoptera, Formicidae, Formicinae): integrating qualitative morphology and multivariate morphometric analysis. ZooKeys 572: 81-154. https://doi.org/10.3897/zookeys.572.7177
Measurements of individual specimens : Explanation note: Basic measurements of individual specimens arranged by species code, collection code, and specimen code (unique identification number). See text for abbreviations.
Supplementary material for the article "Morphometric Analysis of Grape Seeds: Looking for the Origin of Spanish Cultivars"
<p>Supplementary material for:</p> <p> </p> <p><span>Morphometric Analysis of Grape Seeds: Looking for the Origin of Spanish Cultivars</span></p> <p><a><span>Francisco Emanuel Espinosa-Roldán,</span></a><span><span></span></span><span> José Luis Rodríguez-Lorenzo, José Javier Martín-Gómez, Ángel Tocino, Víctor Ruiz Martínez, Adrián Remón Elola, Félix Cabello Sáenz de Santamaría , Fernando Martínez de Toda , Emilio Cervantes and Gregorio Muñoz-Organero</span></p> <div> <span></span></div>
FIGURE 5. Principal components analysis depicting morphometric variables distinguishing northern subspecies, H. l in Phylogenetic structure of Holbrookia lacerata (Cope 1880) (Squamata: Phrynosomatidae): one species or two?
FIGURE 5. Principal components analysis depicting morphometric variables distinguishing northern subspecies, H. l. lacerata (green), from southern subspecies, H. l. subcaudalis (purple).
Fig. 4 in Functional morphology of the cave bear (Ursus spelaeus) mandible: a 3D geometric morphometric analysis
Fig. 4 PCAs on the regression residuals of all extant Ursidae and U. spelaeus after a regression analysis of the Procrustes coordinates onto log centroid size pooled per species (a, b) and on the regression residuals of the regression taking phylogeny into account (c, d). The colors indicate the
Fig. 6 in Functional morphology of the cave bear (Ursus spelaeus) mandible: a 3D geometric morphometric analysis
Fig. 6 Scatterplot of the PC1 scores versus the logarithm of the percentage of foliage in the diet. Linear regression lines were fitted with the 95 % confidence interval of the group mean and the mean scores of U. spelaeus (vertical line)
Fig. 2 in Functional morphology of the cave bear (Ursus spelaeus) mandible: a 3D geometric morphometric analysis
Fig. 2 Mandibles of Ursus spelaeus (a, b) and Tremarctos ornatus (c) and showing the position of the masseteric fossa (MF) and the premasseteric fossa (PMF). Positions of the landmarks on a mandible of Ursus spelaeus on the lingual side (a) and the labial side (b). The landmarks are described in Table 3. Not to scale. Part A of the figure also displays the biomechanics. The resistance (Fout) at the carnassial of the lower jaw depends on the muscular input force (Fin), the angle of insertion of the muscle onto the jaw (α) and the ratio of in-lever arm or moment arm (Li) to out-lever arm (Lo). Angle of insertion of jaw muscles changes during jaw closing and determines the moment arm of the muscular input force (Mi). Mass pertaining to the masseter, Temp pertaining to the temporalis. Li Mass and Mi Mass happen to be the same in this diagram
Fig. 5 2B in Functional morphology of the cave bear (Ursus spelaeus) mandible: a 3D geometric morphometric analysis
Fig. 5 2B-PLS on the regression residuals of all extant Ursidae and U. spelaeus after a regression analysis of the Procrustes coordinates onto log centroid size pooled per species. A phylogenetic overlay is shown in gray
Fig. 28 in Cladistic analysis of the transisthmian genus Eurytellina (Bivalvia: Tellinoidea) based on morphological and morphometric data
Fig. 28 Siphonal muscle details, showing the chiasm region (rci): a) scheme of transversal section of siphons in Anomalocardia brasiliana. Siphonal muscle isolated from the mantle (b–f) in five species: b) Semele proficua; c) Tagelus plebeius; d) Temnoconcha brasiliana; e) Eurytellina nites; f) E. trinitatis. Dashed line indicating original position of anterior adductor muscle. Scale 3 mm
Fig. 32 in Cladistic analysis of the transisthmian genus Eurytellina (Bivalvia: Tellinoidea) based on morphological and morphometric data
Fig. 32 Opened stomach showing stomachal flaps, caeca apertures, dorsal hood, left pouch and aperture of style sac: a) Tagelus plebeius; b) Eurytellina punicea; c) Macoma constricta; d) Iphigenia brasiliana. Scale: 1 mm
Fig. 36 in Cladistic analysis of the transisthmian genus Eurytellina (Bivalvia: Tellinoidea) based on morphological and morphometric data
Fig. 36 Summary of the consensus trees of all analysis with the mainly monophyletic clades within the ingroup. The ancestor shapes are based on outline deformation in MorphoJ generated from landmark optimization in TNT
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