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4,462 results for “South America”
Fig. 1 in Brachyplatystoma promagdalena, new species, a fossil goliath catfish (Siluriformes: Pimelodidae) from the Miocene of Colombia, South America
Fig. 1. Weberian complexes in dorsal view of the fossil and modern Brachyplatystoma species, a, B. promagdalena, IGM183062, b, B. filamentosum, DU F1052, from the río Apure, Venezuela; c, B. rousseauxii, DU F1078, from the río Apure, Venezuela; d, B. vaillantii, DU F1034, from the río Apure, Venezuela. Scale bars equal to 1 cm. Abbreviations: ALP, anterolateral processes; ALTP4, anterior limb of fourth transverse process; C1-CC, First centrum-compound centrum joint; MVE, midventral expansion on fifth centrum; NA, neural arch; NC, neural canal; NS4, neural spine of fourth vertebra; PLTP4, posterior limb of fourth transverse process; SBN, spongy bone, TP4C, crests on fourth transverse process, TP5, fifth transverse process; TP6, sixth transverse process.
Fig. 5 in Brachyplatystoma promagdalena, new species, a fossil goliath catfish (Siluriformes: Pimelodidae) from the Miocene of Colombia, South America
Fig. 5. Weberian complex in right lateral view of the fossil and modern Brachyplatystoma species, a. B. promagdalena, IGM183062, b. B. filamentosum, DU F1052, c. B. rousseauxii, DU F1078, d. B. vaillantii, DU F1034. Scale bars equal to 1 cm. Abbreviations as in Figs. 1, 2 and 4.
Figure 24 in Ontogeny of a new Palaeogene pipid frog from southern South America and xenopodinomorph evolution
Figure 24. Ventral view of the suprascapular cartilages and cleithra of two anuran species. A, Pipa pipa (KU 204065). B, Xenopus wittei (KU 195673). Numbers before the colon indicate the character and numbers after the colon indicate the character state. Cartilage is shown in grey, bone is shown in white, and combined grey and stippling denotes invasion of cleithral ossification. Not to scale.
Figure 21 in Ontogeny of a new Palaeogene pipid frog from southern South America and xenopodinomorph evolution
Figure 21. Ventral aspects of the postzygapophyses of three anuran taxa. A, Discoglossus galganoi (MNCN 15143). B, Xenopus laevis (KU 69842). C, Hymenochirus curtipes (KU 204127). Not to scale.
Figure 20 in Ontogeny of a new Palaeogene pipid frog from southern South America and xenopodinomorph evolution
Figure 20. Ventral views (only right sides shown) of the skulls of four anuran taxa. A, Discoglossus sardus (KU 129239). B, Palaeobatrachus sp. redrawn from Báez & Trueb (1997: fig. 11). C, Silurana epitropicalis (KU 195660). D, Rhinophrynus dorsalis (KU 84886). Numbers before the colon indicate the character and numbers after the colon indicate the character state. Foramina are shown in black, cartilage is shown in grey, and bone is shown in white; the pterygoids are stippled. Not to scale.
Figure 16 in Ontogeny of a new Palaeogene pipid frog from southern South America and xenopodinomorph evolution
Figure 16. Posterior views (only right sides shown) of the skulls of three anuran taxa. A, Xenopus laevis (KU 195935). B, 'X.' romeri redrawn from Estes (1975a: fig.1). C, Pipa pipa (KU 129698). Numbers before the colon indicate the character and numbers after the colon indicate the character state. Foramina are shown in black and bone is shown in white. Not to scale.
Figure 12 in Ontogeny of a new Palaeogene pipid frog from southern South America and xenopodinomorph evolution
Figure 12. Sequence of development of Llankibatrachus truebae; all specimens were staged according to the Nieuwkoop & Faber (1956) normal table for Xenopus laevis and are shown in dorsal view. A, Nieuwkoop & Faber Stage 57/58 tadpole (BAR 2477–10). B, Stage 59 tadpole (BAR 1309–10). C, Stage 62 tadpole (BAR 2474–10). D, Stage 65 tadpole (BAR 2606–10). Calcium deposits and bone impressions are shown in stippling; bones are shown in black. Scale bar = 6 mm.
Figure 10 in Ontogeny of a new Palaeogene pipid frog from southern South America and xenopodinomorph evolution
Figure 10. Photographs of Llankibatrachus truebae larvae. A, Nieuwkoop & Faber Stage 57/58 tadpole in ventral view; note the absence of forelimbs. B, Nieuwkoop & Faber Stage 59 (BAR 1309–10) tadpole in dorsal view; note the erupted forelimbs. Scale bars = 2 mm.
Figure 15 in Ontogeny of a new Palaeogene pipid frog from southern South America and xenopodinomorph evolution
Figure 15. Transverse sections of the skulls of two anuran taxa through the region of the optic foramina. A, Rhinophrynus dorsalis (KU 186799). B, Xenopus muelleri (KU 196041). Numbers before the colon indicate the character and numbers after the colon indicate the character state. Bone is shown in black and cartilage is shown in grey. Not to scale.
Figure 4 in Ontogeny of a new Palaeogene pipid frog from southern South America and xenopodinomorph evolution
Figure 4. Reconstruction of the skull of Llankibatrachus truebae in dorsal view, based primarily on specimens BAR 2469– 10 and 2367–1. Scale bar = 1 mm.
Figure 6 in Ontogeny of a new Palaeogene pipid frog from southern South America and xenopodinomorph evolution
Figure 6. Llankibatrachus truebae. Young postmetamorphic specimens. Photographs of (A) BAR 3080–10 and (B) BAR 2467–10. Scale bars = 5 mm
Figure 19 in Ontogeny of a new Palaeogene pipid frog from southern South America and xenopodinomorph evolution
Figure 19. Premaxillae in frontal view and anterior ends of maxillae in two anuran taxa. A, Pelobates syriacus (KU, 146856). B, Xenopus laevis (KU 195934). Numbers before the colon indicate the character and numbers after the colon indicate the character state. Not to scale.
Figure 3 in Ontogeny of a new Palaeogene pipid frog from southern South America and xenopodinomorph evolution
Figure 3. Partial reconstruction of the skeleton of an adult Llankibatrachus truebae in dorsal view. Based on several specimens (e.g. BAR 2367–1, 2469–10, 2479–10, BAR -1). Scale bar = 3 mm.
Figure 2 in Ontogeny of a new Palaeogene pipid frog from southern South America and xenopodinomorph evolution
Figure 2. Photograph of Llankibatrachus truebae (Holotype, BAR 2469–10) representing a nearly complete, articulated cranial and postcranial skeleton. The specimen is mostly preserved as a dorsal impression, although the ventral surface of several sectioned bones still in situ is also evident. Note the body outline preserved in this specimen. Scale bar = 3 mm.
Figure 14 in Ontogeny of a new Palaeogene pipid frog from southern South America and xenopodinomorph evolution
Figure 14. Nasals and sphenethmoid of two anuran taxa in dorsal view. A, Shelania pascuali (CBPA 12213). B, Xenopus laevis (KU 69842). Numbers before the colon indicate the character and numbers after the colon indicate the character state. Not to scale.
Figure 11. Nieuwkoop & Faber Stage 57 in Ontogeny of a new Palaeogene pipid frog from southern South America and xenopodinomorph evolution
Figure 11. Nieuwkoop & Faber Stage 57/58 tadpole of Llankibatrachus truebae in ventral view. The irregular, stippled area in the posterior half of the head denotes calcium deposits. Stippling in the left leg (right side of the figure) shows ossification of the femur, tibia, and fibula. Scale bar = 3 mm.
Figure 1 in Ontogeny of a new Palaeogene pipid frog from southern South America and xenopodinomorph evolution
Figure 1. Map of north-western Patagonia showing location of the two fossiliferous sites near the northern margin of the Nahuel Huapi Lake, from which Llankibatrachus truebae was recovered.
Figure 5 in Ontogeny of a new Palaeogene pipid frog from southern South America and xenopodinomorph evolution
Figure 5. Skull and pectoral girdle of Llankibatrachus truebae in ventral view (BAR 2720–10). Bones are shown in stippling; dashed lines indicate broken bones. Scale bar = 1 mm.
Figure 8 in Ontogeny of a new Palaeogene pipid frog from southern South America and xenopodinomorph evolution
Figure 8. Ventral view of the left humerus. A, Llankibatrachus truebae (BAR 2367–1, partially reconstructed). B, Xenopus muelleri (MCZ 1631). 'Xenopus' romeri (DNPM 572, right humerus reversed). Not to scale.
Figure 17 in Ontogeny of a new Palaeogene pipid frog from southern South America and xenopodinomorph evolution
Figure 17. Dorsal views of the skulls of three anuran taxa. A, Discoglossus sardus (KU 129239). B, Saltenia ibanezi redrawn from Báez (1981: fig. 2). C, Xenopus muelleri (KU 196043). Numbers before the colon indicate the character and numbers after the colon indicate the character state. Spaces between bones are shown in black, cartilage is shown in grey, and bone is shown in white; the pterygoids are stippled. Not to scale.
ScienceDex guides
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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.