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.
2,441
datasets available to search
ShareScore release 0.9.0
Dataset results
2,441 results for “Extinct”
FIGURE 14. Non-astacidean decapod species with pectinate claws. A–B in Taxonomic revision of the extinct clawed lobster genus Oncopareia Bosquet, 1854 (Decapoda, Astacidea, Nephropidae)
FIGURE 14. Non-astacidean decapod species with pectinate claws. A–B, Ctenocheles cookei (Rathbun, 1935), left propodus in inner (A) and outer (B) lateral views (holotype, USNM 371511). C–D, Ctenocheles cultellus (Rathbun, 1935), incomplete dactylus (A) and fixed finger (B) in upper, lower and lateral views (from Rathbun, 1935, pl. 14, figs. 7–12). E, Ctenocheles inaequidens (Pelseneer, 1886), right major claw (holotype, from Pelseneer, 1886, text-fig. 1). F,?Ctenocheles pectiniformis (Böhm, 1891), isolated claw (from Böhm, 1891, pl. 1, fig. 2, 2a). G, "Ischnodactylus" dentatus Rathbun, 1935, isolated finger (USNM MO 495109).
FIGURE 13 in Taxonomic revision of the extinct clawed lobster genus Oncopareia Bosquet, 1854 (Decapoda, Astacidea, Nephropidae)
FIGURE 13. "Stenocheles" parvulus Fritsch, in Fritsch and Kafka, 1887; lectotype from the lower–middle Turonian (Bílá Hora Formation) in Prague, Czech Republic. A–C, Part of the specimen (NM O3455) under various light conditions. D–F, Counterpart of the same (NM O9092), including the historical cast (D).
FIGURE 2 in White shark comparison reveals a slender body for the extinct megatooth shark, Otodus megalodon (Lamniformes: Otodontidae)
FIGURE 2. The distribution of vertebral diameters throughout each vertebral column, where vertebral number '1' represents the anterior-most centrum in each specimen. A, Graph based on Cooper et al.'s (2022) Data S1 for the vertebral column of †Otodus megalodon from the Miocene of Belgium (IRSNB P 9893), where the vertebral column is most certainly incomplete and the vertebral numbers do not necessarily reflect the original anatomical sequence (grey plots represent significantly damaged vertebrae). B, Graph based on CT-scanned data of an extant white shark (Carcharodon carcharias) specimen (LACM 43805-1), where the vertebral column is complete and the vertebral numbers reflect the anatomical sequence.
FIGURE A1 in White shark comparison reveals a slender body for the extinct megatooth shark, Otodus megalodon (Lamniformes: Otodontidae)
FIGURE A1. Photographic (*) and CT (**) images of cranial region of 187-cm-TL male extant bigeye thresher (Alopias superciliosus: UF 160188) caught off Florida, USA, demonstrating hypercalcified rostral cartilage in the species. Top, ventral view*; middle, ventral view**; bottom, left lateral view **. Note that the same hypercalcification is also present in another specimen of A. superciliosus (UF 178509: 201-cm-TL male caught off Florida). Scale bar = 10 cm.
FIGURE 1 in White shark comparison reveals a slender body for the extinct megatooth shark, Otodus megalodon (Lamniformes: Otodontidae)
FIGURE 1. Simplified family-level phylogenetic hypothesis of Lamniformes showing all extant clades and †Otodontidae (A: dagger [†] indicates extinct), and silhouette depiction of fossil vertebral column of †Otodus megalodon (B). A, Current understanding of lamniform phylogeny demonstrating that a large portion of the phylogenetic tree remains unresolved due to conflicting results based on various molecular and morphological studies (Sternes et al., 2023 and references therein); although the placement of †Otodontidae is tentative and other extinct families are not depicted in this tree, the main point of this illustration is to demonstrate that †Otodontidae lies outside of Lamnidae (both clades highlighted in bold letters) where clades containing one or more species with regional endothermy (indicated by an asterisk [*]) do not share an immediate common ancestry (Sternes et al., 2023). B, Reconstructed vertebral column and its total measured length by Cooper et al. (2022) based on an incomplete associated vertebral set from the Miocene of Belgium; this specific specimen (IRSNB P 9893) was previously estimated to have come from an individual that measured 9.2 m in total length, including the head and caudal fin (Gottfried et al., 1996) based on the modern white shark, not accounted for by Cooper et al. (2022).
FIGURE 4 in White shark comparison reveals a slender body for the extinct megatooth shark, Otodus megalodon (Lamniformes: Otodontidae)
FIGURE 4. Previous and new schematic interpretations of †Otodus megalodon body form. A dark grey silhouette depicting the previously reconstructed †O. megalodon body form by Cooper et al. (2022) based on the extant white shark, superimposing a light grey outline showing the newly interpreted body form of †O. megalodon which is more elongated than the extant white shark. Note: it must be emphasized that this illustration should be strictly regarded as schematic as the exact extent of body elongation, the shape of the head, and the morphology and positions of the fins remain unknown based on the present fossil record.
FIGURE 3 in White shark comparison reveals a slender body for the extinct megatooth shark, Otodus megalodon (Lamniformes: Otodontidae)
FIGURE 3. Photographic (*) and CT images (**) of preserved specimens of extant white shark (Carcharodon carcharias) and salmon shark (Lamna ditropis). A, Complete specimen of 126-cm-TL male C. carcharias caught off central California, USA (LACM 43805-1): from top to bottom, external body* and skeleton** in left lateral view and external body** and skeleton** in ventral view. B, Complete specimen of 151 cm TL male L. ditropis caught off central California (FMNH 117475): from top to bottom, external body* and skeleton** in left lateral view and external body* and skeleton** in dorsal view. C, Head specimen of estimated 271-cm-TL male C. carcharias caught off southern Florida, USA (FMNH 38335): from top to bottom, external head* and cranial skeleton** in left lateral view and external head* and cranial skeleton** in dorsal view. All scale bars equal 10 cm.
Figure 6 in The lungs of extinct and extant coelacanths: a morphological and histological review
Figure 6. – †Axelrodichthys araripensis from the Cretaceous of Brazil ("Josa collection"; specimen deposited at the MNHN, Paris). Sections of bony plates of the lung. A: Section of a bony plate showing the central artefactual fracture (black arrowheads), as on Latimeria plates (see Fig. 4A). B: Detail of a section of a bony plate showing the artefactual fracture (black arrowheads) and the Liesegang lines (black arrows) indi- cating a spheritic mineralization process. C: Section of a bony plate showing the histological organization with regu- lar collagenous layers and osteocytes with canalicles crossing the extracellular matrix. D: Horizontal ground section of a bony plate showing numerous star-shape osteocytes with cytoplasmic processes. Inset: detail of an osteocyte with its ramified canalicles. E: Ground section showing some large vascular cavities (white asterisks). F: Cross- ground section of a bony plate showing Liesegang lines (black arrowheads) and some mineralized spherules (black arrows). G: Horizontal ground section of a bony plate showing an osteocyte with its cytoplasmic processes (on the left, black arrow) and some mineralized spherules (on the right). Scale bars: A = 100 μm; B, C = 25 μm; D, F = 20 μm; inset D, E, G = 10 μm. Deposited at the Laboratoire de Paléontologie, MNHN, Paris.
Figure 7. – A-C in The lungs of extinct and extant coelacanths: a morphological and histological review
Figure 7. – A-C: †Axelrodichthys araripensis from the Cretaceous of Brazil ("Josa collection"; specimen deposited at the MNHN, Paris). SEM images of the bony plates of the lung. A: External view of bony plates of the lung. Succession of bony plates are visible on the right (white asterisk). B: Detail of the external surface of bony plates (see white asterisk of Fig. 7A). Each bumpy relief (white arrowheads) corresponds to a spheritic mineralization. C: Detail of a spheritic mineralized bulk. D: Detail of some mineralized spherules (arrowheads). An osteocyte is seen (white asterisk) with one osteocytic canalicle (white arrow). Scale bars: A = 200 μm; B, C = 20 μm; D = 5 μm. Deposited at the Laboratoire de Paléontologie, MNHN, Paris.
Figure 9 in The lungs of extinct and extant coelacanths: a morphological and histological review
Figure 9. – Protopterus dolloi. Drawing of the dorsal view of a reconstitution made from a series of frontal and transversal sections of the pharyngeal area of a larva. The pharynx (Ph) is massive and the lung (Lu) is coated by the mesentery (Me). BP: branchial pouchs, Br: brain, NC: nephrotic cavity, Oe: oesophagus, Op: opercular, Pn: pronephros, Vcl: left posterior vena cardinalis, Vcr: right posterior vena cardinalis, VE: vitellin endoblast. (Modified from Brien, 1964: fig. 7, p. 393).
Figure 3. – A in The lungs of extinct and extant coelacanths: a morphological and histological review
Figure 3. – A: Latimeria chalumnae. Specimen CCC5 (MNHN- ZA-AC-2012-3); Azocarmin preparation, from Millot et al. (1978). Cross section showing the vestigial lung, surrounded by four plates (arrowheads 1 to 4). Two lumen ramifications (lc) of the lung are seen (see Cupello et al., 2017a). The lumen of the lung is bordered by a monostratified epithelium (mu). mu = mucosa; oe = oesophagus; sm = sub-mucosa. B: †Axelrodichthys araripensis from the Cretaceous of Brazil, "Josa Collection" (specimen deposited at the MNHN, Paris). Transverse ground cross section of the calcified lung showing the imbricated plates (black arrow-heads) around the lumen (black asterisks) (after Clément, 1999: fig. 6). Scale bars: A = 1 mm; B = 5 mm. Deposited at the Laboratoire de Paléontologie, MNHN, Paris.
Fig. 1. A in Trichomycterus venulosus (Steindachner, 1915), a junior synonym of Eremophilus mutisii Humboldt, 1805 (Siluriformes: Trichomycteridae) and not an extinct species
Fig. 1. A. Trichomycterus venulosus, syntype of Pygidium venulosum, 87 mm SL, illustration from Steindachner (1915b); B. Eremophilus mutisii, MPUJ 2528, 54.0 mm SL, Colombia, Cundinamarca, Municipio Guatavita, embalse de Tominé, Vereda Chaleche, Club Náutico Refugio de Tominé, 4º59'10.7"N 73º49'09"W, 2622 m asl, río Magdalena basin; C. E. mutisii, MPUJ 2528, 72.1 mm SL; D. E. mutisii, MBUCV-V-32796, 221.9 mm SL, Colombia, Nariño, Laguna de La Cocha, río Guamuéz drainage, tributary of río Putumayo, Amazon River basin. Scale bars 1 cm.
Fig. 2 in Trichomycterus venulosus (Steindachner, 1915), a junior synonym of Eremophilus mutisii Humboldt, 1805 (Siluriformes: Trichomycteridae) and not an extinct species
Fig. 2. Dorsal view of head of syntype of Pygidium venulosum (NMW 44476: 1, 108.0 mm SL), showing cephalic sensory pores. Abbreviations: i1, infraorbital sensory pore 1; i3, infraorbital sensory pore 3; i10-11, infraorbital sensory pores 10 and 11; pre, preopercular sensory pore; s1-3, supraorbital sensory pores 1-3; s6, supraorbital sensory pore 6 (epiphyseal branch).
Figure 1 in The first extinct species of Acritus LeConte, 1853 (Histeridae: Abraeinae) from Eocene Baltic amber: a microscopic beetle inclusion studied with X-ray micro-computed tomography
Figure 1. Photomicrographs of Acritus sutirca sp. nov., holotype, no. 5541 (MAIG), habitus: (a) ventral view; (b) dorsal view; (c) left lateral view; (d) frontal view. Scale bar represents 0.2 mm.
Figure 2. X in The first extinct species of Acritus LeConte, 1853 (Histeridae: Abraeinae) from Eocene Baltic amber: a microscopic beetle inclusion studied with X-ray micro-computed tomography
Figure 2. X-ray micro-CT renderings of Acritus sutirca sp. nov., holotype, no. 5541 (MAIG), habitus: (a) dorsal view; (b) left lateral view; (c) ventral view; (d) right lateral view. Scale bar represents 0.2 mm.
Figure 4. X in The first extinct species of Acritus LeConte, 1853 (Histeridae: Abraeinae) from Eocene Baltic amber: a microscopic beetle inclusion studied with X-ray micro-computed tomography
Figure 4. X-ray micro-CT renderings of Acritus sutirca sp. nov., holotype, no. 5541 (MAIG): (a–d) aedeagus in dorsal, ventral view and lateral views; (e) antennae. Scale bar represents 0.1 mm.
Figure 3. X in The first extinct species of Acritus LeConte, 1853 (Histeridae: Abraeinae) from Eocene Baltic amber: a microscopic beetle inclusion studied with X-ray micro-computed tomography
Figure 3. X-ray micro-CT renderings of Acritus sutirca sp. nov., holotype, no. 5541 (MAIG), habitus: (a) frontal view; (b) caudal view. Scale bar represents 0.2 mm. Abbreviations: a1 – antennomere 1 (scape); ey – compound eye; py – pygidium; pp – propygidium.
Fig. 12 in The ammonoid recovery after the end-Permian mass extinction: Evidence from the Iran-Transcaucasia area, Siberia, Primorye, and Kazakhstan
Fig. 12. Representatives of Wuchiapingian ammonoids from the Hambast Formation of Abadeh, Central Iran. A. Pseudogastrioceras abichianum (Möller, 1879), DVGI, no. 10/850 (most likely Clarkina leveni Zone). B. Paraceltitites sp., DVGI, no. 1/850 (most likely Clarkina transcaucasica Zone): right lateral (B1) and ventral (B2) views. C. Paratirolites waageni (Stoyanov, 1910), DVGI no. 11/850 (Hambast Formation, upper Member 7), late Dorashamian Paratirolites kittli Zone.
Fig. 10 in The ammonoid recovery after the end-Permian mass extinction: Evidence from the Iran-Transcaucasia area, Siberia, Primorye, and Kazakhstan
Fig. 10. Ammonoids suture lines from lower Olenekian, Mesohedenstroemia bosphorensis Zone; SMID quarry at the Artyom environs, south Primorye. A. Ceratitid Inyoites sedini sp. nov., DVGI 1/851 (holotype). Suture line, height 21.2 mm (A1); whorl cross−section, height 21.1 mm (A2). B. Suture line of phylloceratid Subbalhaeceras shigetai gen. and sp. nov., DVGI 2/851 (holotype). Abbreviations: L, lateral lobe; U, umbilical lobe; V, ventral lobe.
Fig. 7 in The ammonoid recovery after the end-Permian mass extinction: Evidence from the Iran-Transcaucasia area, Siberia, Primorye, and Kazakhstan
Fig. 7. Mangyshlak, Kazakhstan: temporal ranges of ammonoid genera of the upper Olenekian. Abbreviation: Reg. Series, Regional Series.
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.