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.
7
datasets available to search
ShareScore release 0.9.0
Dataset results
7 results for “Nhanulepisosteus”
Figure 4 in Histological study of the oral teeth and their bony support in the Mexican Jurassic gar †Nhanulepisosteus mexicanus (Ginglymodii, Lepisosteidae)
Figure 4. – †Nhanulepisosteus mexicanus. A-B: IGM 4902-5. Cross-section (respectively natural and polarized transmitted light) of a small tooth. We can show a crown of dentine (de), with an external crenulated layer of enameloid (arrow-heads). The pulp cavity (pc) is empty and its wall is regular. Scale bar = 100 μm.
Figure 2 in Histological study of the oral teeth and their bony support in the Mexican Jurassic gar †Nhanulepisosteus mexicanus (Ginglymodii, Lepisosteidae)
Figure 2. – †Nhanulepisosteus mexicanus: External view of the sample used for the paleohistological study (IGM 4902). (see Material and Methods chapter for explanations). Scale bar = 5 mm.
Figure 1 in Histological study of the oral teeth and their bony support in the Mexican Jurassic gar †Nhanulepisosteus mexicanus (Ginglymodii, Lepisosteidae)
Figure 1. – †Nhanulepisosteus mexicanus: External view of the fossil sample (IGM 4901) showing four caniniform teeth with their apical cap of acrodine (arrows). Two small teeth are seen between the fangs (arrowheads). Scale bar = 1 mm.
Figure 7 in Histological study of the oral teeth and their bony support in the Mexican Jurassic gar †Nhanulepisosteus mexicanus (Ginglymodii, Lepisosteidae)
Figure 7. – Comparison of the pulp cavity of the fang teeth in four Lepisosteoidei. Cross sections are made in the mid part of the teeth. A: †Nhanulepisosteus mexicanus (specimen IGM 4902; see Brito et al., 2017). B: †Atractosteus sp.* from the Santonian of Hungary (specimen VER 2014.91.3). C: Atractosteus tropicus. D: Lepisosteus platostomus (See fig. 3C in Meunier and Brito, 2017) The pulp cavity is completely invaded by the dentigerous tissue in †N. mexicanus and in the Santonian †Atractosteus whereas the dentine plies let at least the central mid part in the two extant species. The tooth of †Atractosteus sp. has eusthenodont plicidentine whereas teeth of Atractosteus tropicus and Lepisosteus platostomus have polyplocodont plicidentine. Abbreviations: de: dentine; en: collar enamel; er: external ridges; pc: pulp cavity; rd: radial folding of the dentine; vs: vascular space; arrowheads: dentine folds. Scale bars: A, D = 250 μm; B = 500 μm; C = 150 μm * The photo of the ground section was given to us by Dr. Marton Szabó, Department of Paleontology and Geology, Hungarian Natural History Museum, Ludovika têr 2, Budapest 1083, Hungary.
Figure 6 in Histological study of the oral teeth and their bony support in the Mexican Jurassic gar †Nhanulepisosteus mexicanus (Ginglymodii, Lepisosteidae)
Figure 6. – †Nhanulepisosteus mexicanus: Histological organization of the teeth supporting bone. A: Detail of the basal contact of a tooth (pc) and its supporting bone (bo) with vascular canals or cavities (vc). The white arrows point to osteons. B: Detail of the dentigerous plate showing lamellar bone and numerous cementing lines (black arrow-heads) that characterized an intensive remodeling of bone tissue below the tooth. We also show canalicles of Williamson (arrows). The asterisks point to secondary osteons. C-D: Detail of the secondary osteon (**) of Fig. 6B (respectively natural and polarized transmitted light). The secondary bone of the osteons is lamellar bone (black asterisks). The arrow-heads point to cementing line. We also show canalicles of Williamson (black arrows). E: Detail of the secondary osteon (*) of Fig. 6B showing canaliculi of Williamson (black arrows) and osteocytes (black arrowheads). A: IGM 4902-4; B, C, D, E: IGM 4902- 5. Scale bars: A = 200 μm; B = 100 μm; C, D = 50 μm; E = 25 μm.
Figure 5 in Histological study of the oral teeth and their bony support in the Mexican Jurassic gar †Nhanulepisosteus mexicanus (Ginglymodii, Lepisosteidae)
Figure 5. – †Nhanulepisosteus mexicanus: A: Pharyngeal dentigerous plate. We can see cross (white and black arrow-heads) and axial (white and black arrows) sections of minute teeth. We can also see a section of a scale (sc) (bo = bony tissue). B: Axial section of a pharyngeal tooth (white arrow) and its supporting bony plate (bp). A: IGM 4902-4; B: IGM 4902-5. Scale bars: A = 200 μm; B = 100 μm.
Figure 3 in Histological study of the oral teeth and their bony support in the Mexican Jurassic gar †Nhanulepisosteus mexicanus (Ginglymodii, Lepisosteidae)
Figure 3. – †Nhanulepisosteus mexicanus: Histological organization of the fangs (natural transmitted light). A: Axial section of a tooth. The pulp cavity (pc) is totally occupied by axial trabeculae of dentine (de) alternating with pulp spaces. The tooth is fixed on a basement of reconstructed bone (bo). vc = vascular cavities. B-D: Three cross-sections of different levels of a tooth. B: The section is localized at the tooth base; it shows a ridged crown of orthodentine surrounded by a thin layer of enameloid (en). The pulp cavity is occupied by vascularized dentine. On the bottom of the fig, the bone of attachment (bo). C: The section crosses the mid part of the pulp cavity. The tooth is constituted of a crown of orthodentine (de) surrounded by a layer of enamel (en) showing external crests. The pulp cavity is totally occupied by vascularized dentine. D: The section is in the higher part of the pulp cavity. The tooth is constituted of a crown of orthodentine (de) surrounded by the crenulated enamel (en). We can see the pulp cavity which is reduced. E: Cross-section in the mid part of the tooth. Details of the dentine showing the peripheral orthodentine layer (white asterisks), with its ondontoblastic canalicles and the vascular canals fit together. Each canal is surrounded by orthodentine (black arrow-head). The enameloid layer is crenulated (white arrow-heads). A: IGM 4902-5; B: IGM 4902-3; C,E: IGM 4902-2; D: IGM 4902-1. Scale bars: A, B, C = 200 μm; D = 100 μm; E = 50 μm.
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.