Find research datasets worth reusing
Search datasets from major research repositories and use ShareScore to quickly assess how well each record supports discovery, access, and reuse.
448
datasets available to search
ShareScore release 0.9.0
Dataset results
448 results for “evolutionary morphology”
Morphological cladogenesis and terminal dwarfing in extinct Late Miocene through Pliocene menardiform globorotalids: New complementary data to «Evolutionary prospection in the Neogene planktic foraminifer Globorotalia menardii and related forms from ODP Hole 925B (Céara Rise, western tropical Atlantic): evidence for gradual evolution superimposed by long distance dispersal ?, Swiss J. Palaeontology, 135:205-248»
<p>A complementary morphometric data set is provided to the study of Knappertsbusch (2016) about the shell evolution of menardiform globorotalids (Neogene planktic foraminifera) at ODP Hole 925B from Céara Rise in the the western tropical Atlantic. The new measurements confirm splitting of extinct <em>Globorotalia multicamerata</em> from the <em>G. menardii</em> stock via the intermediate form <em>G. limbata</em> between about 6 Ma to 5 Ma ago. After splitting both <em>G. limbata</em> and <em>G. multicamerata</em> show gradual divergence from <em>G. menardii</em> in several shell parameters illustrating morphological cladogenesis. Between 2.88 Ma and 2.59 Ma the same parameters show a concerted trend towards reduced values indicating pre-extinction dwarfing. A comparison with published literature data of Delta<sup>18</sup>O trends between species, that populated the mixed layer (<em>Globigerinoides sacculifer</em>) and the thermocline layer (<em>Neogloboquadrina dutertrei</em>) at this location during those times suggests, that both divergence and subsequent dwarfing trends were probably the results of changes in upper watermass stratification.</p> <p>The complementary data set is provided in six zipped archives APPENDIX A, B, C, D, E and F (zipped with free software 7-Zip 22.00 (x64), 2022-06-15 from 1999-2022 Igor Pawlow), together with a description of the data in file Report_925B_suppl_1.pdf.</p>
Data from: Morphological disparity and evolutionary patterns of Cambrian hyoliths
<p>Hyolitha represents one of the major components of the Cambrian evolutionary fauna, first appearing in the Terreneuvian and rapidly diversifying soon after. Recent work has both enriched the hyolith fossil records and expanded our understanding of their biology, but studies documenting the evolutionary trajectory of Cambrian hyoliths remain scarce. Here we present the first study of changes in morphological disparity in Cambrian hyoliths over time with the aim of characterizing the evolutionary trajectory of hyoliths through their primary period of diversification. Our results show that hyoliths occupy distinct regions of morphospace at different times during the Cambrian, with an expansion in morphospace occupation associated with the increase in hyolith diversity in the early Cambrian. Both the Sinsk Event and multiple abiotic factors led to a decline in hyolith diversity in the Miaolingian, and morphological disparity also contracts in association with this reduction in diversity.</p>
Fig. 5 in A new genus of Norian involutinid foraminifers: Its morphological, biostratigraphic, and evolutionary significance
Fig. 5. Involutinid foraminifer Aulosina oberhauseri (Koehn−Zaninetti and Brönnimann, 1968), Black Marble Quarry (upper Carnian?–lower–middle? Norian). A, B. Tangential sections, MHNG 2011−1−440w (A) and MHNG 2011−1−341c (B). Note the absence of transversely sectioned inner−pillars. C–F. Lamellae interfingering in the umbilical region (white arrowheads). C. MHNG 2011−1−440x, sub−axial; centred section. D. MHNG 2011−1−391a, thin +
Fig. 8 in A new genus of Norian involutinid foraminifers: Its morphological, biostratigraphic, and evolutionary significance
Fig. 8. Sketch showing the theoretical evolutionary steps of the hypothetic Aulotortus–Triasina lineage.
Fig. 7 in A new genus of Norian involutinid foraminifers: Its morphological, biostratigraphic, and evolutionary significance
Fig. 7. Tubular chamber section concept in Involutinidae. Aulotortus: tubular chamber simple, without internal structures; Aulosina gen. nov.: tubular chamber lumen constricted by strenghtenings; Triasina: tubular chamber supported by inner−pillars. Note similarities between sections of different genera. The axial horizontal section of the tubular chamber is the most reliable for a generic identification.
Fig. 6 in A new genus of Norian involutinid foraminifers: Its morphological, biostratigraphic, and evolutionary significance
Fig. 6. Innermost structure differences in Upper Triassic Involutinina. Only genera morphologically closed to Aulosina are here taking into account; each form being hyaline, aragonitic, perforated, with a lenticular to globular test.
Fig. 9 in Ecophenotypic plasticity versus evolutionary trends-morphological variability in Upper Jurassic bivalve shells from Portugal
Fig. 9. Scatter plot of resilifer number over ligament length in Isognomon. The two groups that correspond to lithostratigraphy are clearly visible. Numbers in squared brackets refer to Fig. 2.
Fig. 8 in Ecophenotypic plasticity versus evolutionary trends-morphological variability in Upper Jurassic bivalve shells from Portugal
Fig. 8. Box plots of size for the three target taxa. A. Size of Arcomytilus based on log transformed geometric means of length and height. B. Size of Isognomon based on log transformed ligament length. C. Size of Eomiodon based on log transformed shell length. Arrangement of boxes corresponding more or less to their stratigraphic succession, from left to right. Numbers in squared brackets refer to Fig. 2.
Fig. 12 in Ecophenotypic plasticity versus evolutionary trends-morphological variability in Upper Jurassic bivalve shells from Portugal
Fig. 12. PCA plot of shell shape in Arcomytilus, grouped according to rib number in steps of 25 ribs and displayed as convex hulls.
Fig. 7 in Ecophenotypic plasticity versus evolutionary trends-morphological variability in Upper Jurassic bivalve shells from Portugal
Fig. 7. Scatter plots of log transformed values of height over length for the three target taxa. A. Arcomytilus. B. Isognomon. C. Eomiodon. Numbers in squared brackets refer to Fig. 2.
Fig. 6 in Ecophenotypic plasticity versus evolutionary trends-morphological variability in Upper Jurassic bivalve shells from Portugal
Fig. 6. Measured distances in the three target taxa. A. Arcomytilus. B. Isognomon. C. Eomiodon. Abbreviations: H, height; L, length; LL, ligament length. Arrow indicates turning point of growth.
Fig. 5 in Ecophenotypic plasticity versus evolutionary trends-morphological variability in Upper Jurassic bivalve shells from Portugal
Fig. 5. Specimens of neomiodontid bivalve Eomiodon securiformis (Sharpe, 1850) from the Upper Jurassic of Portugal. A–C. Sobral member, Late Kimmeridgian, E Arranhó. A. Hinge plates of left and right valve. GML 25915. B. Interior of right valve, showing hinge arrangement and parts of the muscle scars. GML 25916. C. Left valve view of articulated specimen. GML 25917. D. Articulated, strongly elongated, gerontic specimen. Sobral member, Late Kimmeridgian, Santa Cruz. GML 25918. E. Small articulated specimen with clearly visible commarginal lamellae. Alcobaça formation, Early Kimmeridgian, Vestiaria. GML 25919. F. Articulated gerontic specimen with ventrally elongated shell. Alcobaça formation, Early Kimmeridgian, Salgados. GML 25920. G. Short, rounded, articulated specimen. Sobral member, Late Kimmeridgian, E Arranhó. GML 25921. H. Large, high, and short specimen. Sobral member, Late Kimmeridgian, Porto das Barcas. GML 25922.
Fig. 3 in Ecophenotypic plasticity versus evolutionary trends-morphological variability in Upper Jurassic bivalve shells from Portugal
Fig. 3. Specimens of mytilid bivalve Arcomytilus from the Middle and Upper Jurassic of Portugal and France. A–F. Arcomytilus morrisii (Sharpe, 1850). A. Large articulated specimen with pointed umbones and slightly imprinted anterior part. Arranhó II member, earliest Tithonian, Serra de Alrota. GML 25900. B. Small adult specimen, left valve with fine ribbing pattern and relatively straight anterior margin. Alcobaça formation, Late Kimmeridgian, Consolação. GML 25901. C. Young adult specimen, left valve with coarse ribbing pattern and large, elevated disc. Arranhó II member, Early Tithonian, Santa Cruz. GML 25902. D. Small adult, articulated specimen. Alcobaça formation, Early Kimmeridgian, Salir do Porto. GML 25903. E. Large articulated specimen with extremely triangular outline and wide−spaced, strong ribs. Arranhó II member, Early Tithonian, Lameiro das Antas. GML 25904. F. Adult specimen, left valve with bi− and trifurcation and simultaneous insertion of ribs. Arranhó II member, Early Tithonian, Santa Cruz. GML 25905. G. Arcomytilus asper. Right valve. Late Bathonian, Luc−sur−Mer, Calvados, France. MNHN J 08224. H. Arcomytilus bathonicus. Right valve. Late Bathonian, Luc−sur−Mer, Calvados, France. MNHN, coll. Deshayes 1876−8. I. Arcomytilus pectinatus. Right valve. "Corallien", La Rochelle, Charente−Maritime, France. MNHN, coll. d'Orbigny 4247.
Fig. 11 in Ecophenotypic plasticity versus evolutionary trends-morphological variability in Upper Jurassic bivalve shells from Portugal
Fig. 11. Lithostratigraphy plot of Arcomytilus. A. Different species and lithostratigraphically grouped Arcomytilus morrisii are displayed as convex hulls. Calculated artificial shell outlines for full number coordinate pairs are plotted to illustrate the morphospace. M; mean artificial shell outline. B. 95% confidence ellipses of group means and corresponding calculated shell outlines for group means are plotted. Numbers in squared brackets refer to Fig. 2.
Fig. 2 in Ecophenotypic plasticity versus evolutionary trends-morphological variability in Upper Jurassic bivalve shells from Portugal
Fig. 2. Lithostratigraphy of the Upper Jurassic rock suite in the Lusitanian Basin. Modified from Schneider et al. (2009). All units discussed herein are numbered in squared brackets. Formations and members that are not yet formally established are written in lower case letters. Abbreviations: A., Arisphinctes; As., Aspidoceras; Au., Aulacostephanus; C., Crussoliceras; D., Dichotomoceras; Fm., formation; M., Micracanthoceras; Mb., member; Q., Quenstedtoceras; S., Simoceras; Se., Semiformiceras.
Fig. 1 in Ecophenotypic plasticity versus evolutionary trends-morphological variability in Upper Jurassic bivalve shells from Portugal
Fig. 1. Geographic and geological overview of the Lusitanian Basin. The numbering of localities refers to Table 1, second column.
Fig. 14 in Ecophenotypic plasticity versus evolutionary trends-morphological variability in Upper Jurassic bivalve shells from Portugal
Fig. 14. Lithostratigraphy plot of Eomiodon securiformis. A. Lithostratigraphically arranged groups are displayed as convex hulls. Calculated artificial shell outlines for full number coordinate pairs are plotted to illustrate the morphospace. M, mean artificial shell outline. B. 95% confidence ellipses of group means and corresponding calculated shell outlines for group means are plotted. Numbers in squared brackets refer to Fig. 2.
Fig. 16 in Ecophenotypic plasticity versus evolutionary trends-morphological variability in Upper Jurassic bivalve shells from Portugal
Fig. 16. Left valve of neomiodontid bivalve Eomiodon sp. from Early Tithonian, Arranhó II member, Santa Cruz (GML 25929) in internal (A) and external (B) views.
Fig. 7 in Morphology and evolutionary significance of the atlas-axis complex in varanopid synapsids
Fig. 7. Photograph (A) and outline drawing (B) of the axis of BP/1/5678, a putative specimen of Elliotsmithia longiceps Broom, 1937, Tapinocephalus Assemblage Zone, Abrahamskraal Formation, Middle Permian, Western Cape Province, South Africa (Modesto et al. 2001) or Heleosaurus scholtzi Broom, 1907, Tapinocephalus Assemblage Zone, Abrahamskraal Formation, Middle Permian (Botha−Brink and Modesto 2009).
Fig. 6 in Morphology and evolutionary significance of the atlas-axis complex in varanopid synapsids
Fig. 6. Bivariate plots and regression analyses of the atlas−axis complex in varanopids and other non−therapsid synapsids. A. Spine height relative to centrum height. B. Spine length relative to centrum height. C. Residual plot of spine height. D. Residual plot of spine length. The regressions results and statistics are presented in the table below A and B.
ScienceDex guides
Understand access before you commit
These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
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.