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.
373
datasets available to search
ShareScore release 0.9.0
Dataset results
373 results for “Crocodyliformes”
Figure 37 in Cretaceous Crocodyliforms from the Sahara
Figure 37. Lower jaws of the crocodyliform Laganosuchus thaumastos gen. n. sp. n. Cast (UCRC PVC9) of lower jaws (MNN IGU13). A Dorsal view. B Left lateral view (reversed). Scale bar equals 20 cm. Dashed line indicates missing bone. Abbreviations: ad1, 4, 6, 7, 16–19, 24, alveolus for dentary tooth 1, 4, 6, 7, 16–19, 24; cp, coronoid process; d, dentary; gl, glenoid; rp, retroarticular process.
Figure 28 in Cretaceous Crocodyliforms from the Sahara
Figure 28. Left dentary of the crocodyliform Araripesuchus rattoides sp. n. Pencil drawing of isolated left dentary ramus lacking teeth (UCRC PV3). A Dorsal view. B Ventral view. C Medial view. Scale bar equals 1 cm. Parallel lines indicate broken bone surface. Abbreviations: ad1, 4, 5, 8, alveolus for dentary tooth 1, 4, 5, 8; asp, articular surface for the splenial; fen, fenestra; fo, foramen; sym, symphysis.
Data from: Evidence for heterochrony in the cranial evolution of fossil crocodyliforms
The southern supercontinent of Gondwana was home to an extraordinary diversity of stem-crocodylians (Crocodyliformes) during the Late Cretaceous. The remarkable morphological disparity of notosuchian crocodyliforms indicates that this group filled a wide range of ecological roles more frequently occupied by other vertebrates. Among notosuchians, the distinctive cranial morphology and large body sizes of Baurusuchidae suggest a role as apex predators in ecosystems in which the otherwise dominant predatory theropod dinosaurs were scarce. Large-bodied crocodyliforms, modern and extinct, are known to have reached large sizes by extending their growth period. In a similar way, peramorphic heterochronic processes may have driven the evolution of the similarly large baurusuchids. To assess the presence of peramorphic processes in the cranial evolution of baurusuchids, we applied a geometric morphometric approach to investigate ontogenetic cranial shape variation in a comprehensive sample of notosuchians. Our results provide quantitative morphological evidence that peramorphic processes influenced the cranial evolution of baurusuchids. After applying size and ancestral ontogenetic allometry corrections to our data, we found no support for the action of either hypermorphosis or acceleration, indicating that these two processes alone cannot explain the shape variation observed in Notosuchia. Nevertheless, the strong link between cranial shape variation and size increase in baurusuchids suggests that peramorphic processes were involved in the emergence of hypercarnivory in these animals. Our findings illustrate the role of heterochrony as a macroevolutionary driver, and stress, once more, the usefulness of geometric morphometric techniques for identifying heterochronic processes behind evolutionary trends.
Data from: What's in an outgroup? The impact of outgroup choice on the phylogenetic position of Thalattosuchia (Crocodylomorpha) and the origin of Crocodyliformes
Outgroup sampling is a central issue in phylogenetic analysis. However, good justification is rarely given for outgroup selection in published analyses. Recent advances in our understanding of archosaur phylogeny suggest that many previous studies of crocodylomorph and crocodyliform relationships have rooted trees on outgroup taxa that are only very distantly related to the ingroup (e.g., Gracilisuchus stipanicicorum), or might actually belong within the ingroup. Thalattosuchia, a group of Mesozoic marine crocodylomorphs, has a controversial phylogenetic position—they are recovered as either the sister group to Crocodyliformes, in a basal position within Crocodyliformes, or nested high in the crocodyliform tree. Thalattosuchians lack several crocodyliform apomorphies, but share several character states with derived long-snouted forms with a similar ecological habit, suggesting their derived position may be the result of convergent evolution. Several of these "shared" characters may result from ambiguously worded character state definitions—structures that are superficially similar but anatomically different in detail are identically coded. A new analysis of crocodylomorphs with increased outgroup sampling recovers Thalattosuchia as the sister group to Crocodyliformes, distantly related to long-snouted crocodyliforms. I also demonstrate that expanding the outgroup sampling of previously published matrices results in the recovery of thalattosuchians as sister to Crocodyliformes. The exclusion of thalattosuchians from Crocodyliformes has numerous implications for large-scale evolutionary trends within the group, including extensive convergence in the evolution of the secondary palate characteristic of the group. These results demonstrate the importance of careful outgroup sampling and character construction, and their profound effect on the position of labile clades.
Figure 10. Teeth. A, Ibc 309. B, Ibc 314. C, Ibc 1656 in Trematochampsa taqueti as a nomen dubium and the crocodyliform diversity of the Upper Cretaceous In Beceten Formation of Niger
Figure 10. Teeth. A, Ibc 309. B, Ibc 314. C, Ibc 1656. Scale is 1 cm.
Figure 1 in Trematochampsa taqueti as a nomen dubium and the crocodyliform diversity of the Upper Cretaceous In Beceten Formation of Niger
Figure 1. Geological map of Niger, modified from Greigert & Pougnet (1965).
FIG. 78 in Form and function of the pelvic girdle of Thalattosuchia and Dyrosauridae (Crocodyliformes)
FIG. 78. — Phylogeny of Teleosauroidea (Part 1). Numbers highlight acquisition of morphologies based on our morphological observations. Figure modified from Johnson et al. (2020).
FIG. 82 in Form and function of the pelvic girdle of Thalattosuchia and Dyrosauridae (Crocodyliformes)
FIG. 82. — Phylogeny of Dyrosauridae (Part 2). Numbers highlight acquisition of morphologies based on our morphological observations. Figure modified from Jouve & Jalil (2020).
FIG. 47 in Form and function of the pelvic girdle of Thalattosuchia and Dyrosauridae (Crocodyliformes)
FIG. 47. — Pelvic reconstruction of Macrospondylus bollensis (Jäger, 1828), NHMUK PV R 5703 (holotype): A, lateral view; B, anterior view; C, ventral view; D, dorsal view. Arrow points anteriorly. Target indicates anterior. The right ischium and left pubis are mirrored. Reconstruction of the ischium based on Macrospondylus bollensis, SMNS 16848. Scale bar: 5 cm.
FIG. 22 in Form and function of the pelvic girdle of Thalattosuchia and Dyrosauridae (Crocodyliformes)
FIG. 22. — Pelvic girdle elements of 'Metriorhynchus' brachyrhynchus (Eudes-Deslongchamps, 1867), NHMUK PV R 4763: A, left pubis in anterior view (obtained from 3D model); B, left ilium in medial view; C, left ischium in medial view; D, left ilium in lateral view; E, superimposed outlines of the ischia of NHMUK PV R 4763 and NHMUK PV R 3804. Target indicates anterior. Arrow points anteriorly. Pictures of 'Metriorhynchus' brachyrhynchus, NHMUK PV R 4763, copyright from The Trustees of the Natural History Museum. Scale bar: 1 cm.
FIG. 14 in Form and function of the pelvic girdle of Thalattosuchia and Dyrosauridae (Crocodyliformes)
FIG. 14. — Right ilia and pubis of Thalattosuchus superciliosus (Blainville, 1853), SMNS 10116 (A-D) and NMI F21731 (E-G): A, E, right ilium in lateral view; B, F, right ilium in anterior view; C, G, right ilium in medial view; D, right pubis in anterior view. Target indicates anterior. Arrow points anteriorly. Scale bars: 1 cm.
FIG. 10 in Form and function of the pelvic girdle of Thalattosuchia and Dyrosauridae (Crocodyliformes)
FIG. 10. — Pelvic girdle elements of Pelagosaurus typus Bronn, 1841: A, B, NHMUK PV OR 32605; A, left ischium in medial view; B, left ischium in anterior view; C, NHMUK PV OR 32604, left pubis in posterior view; D-F, SMNS 17758; D, right ilium in lateral view; E, right pubis in anterior view; F, right ischium in medial view. Target indicates anterior. Arrow points anteriorly. Scale bars: 1 cm.
FIG. 2 in The youngest known South American dyrosaurid (Late Paleocene of Colombia), and evolution of Dyrosauridae (Crocodyliformes: Tethysuchia)
FIG. 2. — Stratigraphical section at the Piñalerita Creek with position of the vertebra and palynological results of some key taxa in the transition Paleocene-Eocene (after Jaramillo & Dilcher 2001; Jaramillo et al. 2011).
Figure 8 in Cranial osteology and phylogenetic relationships of Hamadasuchus rebouli (Crocodyliformes: Mesoeucrocodylia) from the Cretaceous of Morocco
Figure 8. Results of phylogenetic analysis. A, strict consensus of the 48 most parsimonious trees with all taxa included. Tree length is 548 steps, consistency index is 0.3923, retention index is 0.6623, and rescaled consistency index is 0.2598. Bootstrap support values are given above each branch for values greater than 50%. Bremer decay values are given below each branch. B, Adams consensus of the same set of trees with Adams decay values below each branch. C, strict consensus of the 138 most parsimonious trees of the reduced taxon set. Tree length is 540 steps, consistency index is 0.3981, retention index is 0.6546, and rescaled consistency index is 0.2606. Bootstrap support values greater than 50% are presented above each branch and Bremer decay values below each branch. D, Adams consensus of this set of trees with Adams decay values below each branch.
Figure 3 in A new specimen of Uruguaysuchus aznarezi (Crocodyliformes: Notosuchia) from the middle Cretaceous of Uruguay and its phylogenetic relationships
Figure 3. FC-DPV 2320, anterior end of rostrum in left lateral view. Scale bar = 2 cm.
Figure 7 in A new specimen of Uruguaysuchus aznarezi (Crocodyliformes: Notosuchia) from the middle Cretaceous of Uruguay and its phylogenetic relationships
Figure 7. FC-DPV 2320, otic region of right quadrate in lateral view. Scale bar = 2 cm.
Figure 4 in A new specimen of Uruguaysuchus aznarezi (Crocodyliformes: Notosuchia) from the middle Cretaceous of Uruguay and its phylogenetic relationships
Figure 4. FC-DPV 2320, detail of right jugal and lacrimal in lateral view. Scale bar = 2 cm.
Figure 13 in A new specimen of Uruguaysuchus aznarezi (Crocodyliformes: Notosuchia) from the middle Cretaceous of Uruguay and its phylogenetic relationships
Figure 13. FC-DPV 2320, atlas intercentrum. A, dorsal view. B, ventral view. Scale bar = 1 cm.
Figure 13 in Baurusuchid crocodyliforms as theropod mimics: clues from the skull and appendicular morphology of Stratiotosuchus maxhechti (Upper Cretaceous of Brazil)
Figure 13. Left and right femora of S. maxhechti (DGM 1477-R) in cranial view. Scale bar = 10 cm.
Data from: What’s in an outgroup? The impact of outgroup choice on the phylogenetic position of Thalattosuchia (Crocodylomorpha) and the origin of Crocodyliformes
Open the record for dataset details and reuse information.
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.