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609 results for “morphometric analysis”
Data from: Taxonomic and evolutionary pattern revisions resulting from geometric morphometric analysis of Pennsylvanian Neognathodus conodonts, Illinois Basin
Conodont fossils are highly valuable for Paleozoic biostratigraphy and for interpreting evolutionary change, but identifying and describing conodont morphologies, and characterizing gradual shape variation remain challenging. We used geometric morphometrics (GM) to conduct the first landmark-based morphometric analysis of the biostratigraphically useful conodont genus Neognathodus. Our objective is to assess whether previously defined morphotype groups are reliably distinct from one another. As such, we reevaluate patterns of morphologic change in Neognathodus P1elements, perform maximum likelihood tests of evolutionary modes, and construct novel, GM-based biozonations through a Desmoinesian (Middle Pennsylvanian) section in the Illinois Basin. Our GM results record the entire spectrum of shape variability among Neognathodus morphotypes thus alleviating the problem of documenting and classifying gradual morphologic transitions between morphotypes. Statistically distinct GM groups support previously established classifications of N. bassleri, N. bothrops, and N. roundyi. Statistically indistinct pairs of GM groups do not support literature designations of N. medadultimus and N. medexultimus, and N. dilatus and N. metanodosus, and we synonymize each pair. Maximum likelihood tests of evolutionary modes provide the first statistical assessment of Neognathodus evolutionary models in the Desmoinesian. The most likely evolutionary models are an unbiased random walk or a general random walk. We name four distinct biozones through the Desmoinesian using GM results and these align with previous biozonation structure based on the Neognathodus Index (NI) illustrating that Neognathodus-based biostratigraphic correlations would not change between GM or NI methods. The structural similarity between both biozonations showcases that determining GM-based biozones is not redundant, as this comparison validates using landmark-based GM work to construct viable biozonations for subsequent stratigraphic correlations. Although this study is limited to the Illinois Basin, our quantitative methodology can be broadly applied to additional genera to test taxonomic designations, interpret statistically-robust evolutionary patterns, and construct valid biozones for this significant chordate group.
FIGURE 6 in Morphometric analysis of the Rio Apaporis Caiman (Reptilia, Crocodylia, Alligatoridae)
FIGURE 6. Geographic distribution of Caiman crocodilus apaporiensis, C. crocodilus complex and C. yacare examined.
FIGURE 4. Caiman crocodilus fuscus, FMNH 69849 in Morphometric analysis of the Rio Apaporis Caiman (Reptilia, Crocodylia, Alligatoridae)
FIGURE 4. Caiman crocodilus fuscus, FMNH 69849. Skull in dorsal, lateral and ventral views. Jaw in dorsal view.
FIGURE 7 in Morphometric analysis of the Rio Apaporis Caiman (Reptilia, Crocodylia, Alligatoridae)
FIGURE 7. Distribution of C. c. apaporiensis, C. crocodilus complex and C. yacare along the first and second principal components axes.
FIGURE 5. Caiman crocodilus crocodilus, FMNH 26672 in Morphometric analysis of the Rio Apaporis Caiman (Reptilia, Crocodylia, Alligatoridae)
FIGURE 5. Caiman crocodilus crocodilus, FMNH 26672. Skull in dorsal, lateral and ventral views. Jaw in dorsal view.
FIGURE 3. Caiman crocodilus chiapasius, FMNH 73709 in Morphometric analysis of the Rio Apaporis Caiman (Reptilia, Crocodylia, Alligatoridae)
FIGURE 3. Caiman crocodilus chiapasius, FMNH 73709. Skull in dorsal, lateral and ventral views. Jaw in dorsal view.
FIGURE 2 in Morphometric analysis of the Rio Apaporis Caiman (Reptilia, Crocodylia, Alligatoridae)
FIGURE 2. Caiman yacare (= C. crocodilus yacare), FMNH 9150. Skull in dorsal, lateral and ventral views. Jaw in dorsal view.
FIGURE 1 in Morphometric analysis of the Rio Apaporis Caiman (Reptilia, Crocodylia, Alligatoridae)
FIGURE 1. Caiman crocodilus apaporiensis, holotype, FMNH 69812. Skull in dorsal, lateral and ventral views. Jaw in dorsal view.
Fig. 4 in Morphometric analysis and taxonomic revision of Anisopteromalus Ruschka (Hymenoptera: Chalcidoidea: Pteromalidae) - an integrative approach
Fig. 4. ML trees from the analyses of ITS2 and Cytb sequences of several strains of the OTUs Anisopteromalus calandrae and A. quinarius. Bootstrap supports higher than 70% are indicated at nodes. Scale bar indicates substitution per site for both trees.
FIGURE 7 in Intrapopulational variation in color pattern of Trichomycterus davisi (Haseman, 1911) (Siluriformes: Trichomycteridae) corroborated by morphometrics and molecular analysis
FIGURE 7. Box plot of color pattern classes (Phenotypes I, II and III) by standard length (a, b, and c referring to significant differences as eVidenced by ANOVA).
FIGURE 8 in Intrapopulational variation in color pattern of Trichomycterus davisi (Haseman, 1911) (Siluriformes: Trichomycteridae) corroborated by morphometrics and molecular analysis
FIGURE 8. Median-joining networks between haplotypes (A) and Bayesian phylogenetic tree (B) of the COI gene to phenotypes of Trichomycterus davisi from the Ribeirão João Pinheiro and Rio Iguaçu. and T. iheringi. In A) each circle represents a unique haplotype with circle sizes being proportional to their frequencies. Each color is corresponding to a phenotype, and the numbers in parentheses represent the mutation steps between haplotypes. In B) the numbers on the nodes represent posterior probability higher than 95%.
FIGURE 5 in Intrapopulational variation in color pattern of Trichomycterus davisi (Haseman, 1911) (Siluriformes: Trichomycteridae) corroborated by morphometrics and molecular analysis
FIGURE 5. Scatter plot of indiVidual scores from the combined samples of Trichomycterus davisi phenotypes of the Ribeirão João Pinheiro in the first three axes of the Principal Component Analysis (PCA). Phenotype I (open squares), Phenotype II (filled squares), and Phenotype III (crosses).
FIGURE 6 in Intrapopulational variation in color pattern of Trichomycterus davisi (Haseman, 1911) (Siluriformes: Trichomycteridae) corroborated by morphometrics and molecular analysis
FIGURE 6. Frequencies (%) of the number of specimens by color pattern classes (Phenotypes I, II, and III).
FIGURE 4 in Intrapopulational variation in color pattern of Trichomycterus davisi (Haseman, 1911) (Siluriformes: Trichomycteridae) corroborated by morphometrics and molecular analysis
FIGURE 4. Type-specimens of T. davisi. A) FMNH 60309, holotype, 41.3 mm SL, b) FMNH 54242, paratype, 43.5 mm SL, and C) FMNH 54242, paratype, 23.2 mm SL.
FIGURE 3 in Intrapopulational variation in color pattern of Trichomycterus davisi (Haseman, 1911) (Siluriformes: Trichomycteridae) corroborated by morphometrics and molecular analysis
FIGURE 3. Color pattern Variation in T. davisi of Ribeirão João Pinheiro, Telêmaco Borba, state of Paraná, Brazil. MZUEL 11776, Phenotype I (specimens A, 84.56 mm SL, and B, 43.91 mm SL), Phenotype II (specimens C, 68.24 mm SL, D, 49.28 mm SL and E, 73.56 mm SL) and Phenotype III (specimens F, 53.11 mm SL, and G, 34.83 mm SL). Scale bars represent 10 mm.
FIGURE 1 in Intrapopulational variation in color pattern of Trichomycterus davisi (Haseman, 1911) (Siluriformes: Trichomycteridae) corroborated by morphometrics and molecular analysis
FIGURE 1. Location of sampling area in the Ribeirão João Pinheiro, 24°16'41"S, 050°35'12"w, Fazenda Monte Alegre Ecological ReserVe, Telêmaco Borba (yellow diamond) and Ribeirão Macaquinho, 25°38'34"S, 049°35'24"w, Serrinha, Município de Contenda, near the type locality of Trichomycterus davisi (yellow star), state of Paraná, Brazil.
FIGURE 9. Principal Component Analysis showing morphometric data from C in Two new troglobitic Coarazuphium Gnaspini, Godoy & Vanin 1998 species of ground beetles from iron ore Brazilian caves (Coleoptera: Carabidae: Zuphiini)
FIGURE 9. Principal Component Analysis showing morphometric data from C. spinifemur new species (red dots); C. amazonicus new species (green triangles) and C. tapiaguassu (purple dots): AL, Antenna length; OBL, Overall body length; HL, Head length; HW, Head width; PL, Pronotum length; PW, Pronotum width; EL, Elytra length; EW, Elytra width; PF, Profemur length; PTI, Protibia length; PTA, Protarsus length; MSF, Mesofemur length; MSTI, Mesotibia length; MSTA, Mesotarsus length; MTF, Metafemur length; MTTI, Metatibia length; MTTA, Metatarsus length.
Fig. 1 in Morphometric Analysis of Dineutus emarginatus (Say) (Coleoptera: Gyrinidae): Subspecies Designation Reconsidered
Fig. 1. Dorsal habitus (semi-diagrammatic) of Dineutus, illustrating measurement points (abbreviations are given in Materials and Methods).
Fig. 2 in Morphometric Analysis of Dineutus emarginatus (Say) (Coleoptera: Gyrinidae): Subspecies Designation Reconsidered
Fig. 2. Lateral habitus (semi-diagrammatic) of Dineutus, illustrating measurement points (abbreviations are given in Materials and Methods).
Fig. 5 in Morphometric Analysis of Dineutus emarginatus (Say) (Coleoptera: Gyrinidae): Subspecies Designation Reconsidered
Fig. 5. Component scores of the first two components from the Principal Components Analysis for female Dineutus emarginatus (n 5 57);, central to southern Florida; ', north of central Florida; X, Dineutus e. floridensis paratype.
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Allen Brain Atlas
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International Brain Laboratory public data
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OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.