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139 results for “lungfish”
Data from: The dipnoan buccal pump reconstructed in 3D and implications for air breathing in Devonian lungfishes
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Aldosterone and dexamethasone activate African lungfish mineralocorticoid receptor: Increased activation after removal of the amino-terminal domain
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Dataset for: The biogeography of extant lungfishes traces the breakup of Gondwana
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Data from: New Cretaceous lungfishes (Dipnoi, Ceratodontidae) from western North America
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Data from: A new method for reconstructing brain morphology: applying the brain-neurocranial spatial relationship in an extant lungfish to a fossil endocast
Lungfish first appeared in the geological record over 410 million years ago and are the closest living group of fish to the tetrapods. Palaeoneurological investigations into the group show that unlike numerous other fishes—but more similar to those in tetrapods—lungfish appear to have had a close fit between the brain and the cranial cavity that housed it. As such, researchers can use the endocast of fossil taxa (an internal cast of the cranial cavity) both as a source of morphological data but also to aid in developing functional and phylogenetic implications about the group. Using fossil endocast data from a three-dimensional-preserved Late Devonian lungfish from the Gogo Formation, Rhinodipterus, and the brain-neurocranial relationship in the extant Australian lungfish, Neoceratodus, we herein present the first virtually reconstructed brain of a fossil lungfish. Computed tomographic data and a newly developed 'brain-warping' method are used in conjunction with our own distance map software tool to both analyse and present the data. The brain reconstruction is adequate, but we envisage that its accuracy and wider application in other taxonomic groups will grow with increasing availability of tomographic datasets.
Data from: Brain – endocast relationship in the Australian lungfish, Neoceratodus forsteri, elucidated from tomographic data (Sarcopterygii: Dipnoi)
Although the brains of the three extant lungfish genera have been previously described, the spatial relationship between the brain and the neurocranium has never before been fully described nor quantified. Through the application of virtual microtomography (μCT) and 3D rendering software, we describe aspects of the gross anatomy of the brain and labyrinth region in the Australian lungfish, Neoceratodus forsteri and compare this to previous accounts. Unexpected characters in this specimen include short olfactory peduncles connecting the olfactory bulbs to the telencephalon, and an oblong telencephalon. Furthermore, we illustrate the endocast (the mould of the internal space of the neurocranial cavity) of Neoceratodus, also describing and quantifying the brain-endocast relationship in a lungfish for the first time. Overall, the brain of the Australian lungfish closely matches the size and shape of the endocast cavity housing it, filling more than four fifths of the total volume. The forebrain and labyrinth regions of the brain correspond very well to the endocast morphology, while the midbrain and hindbrain do not fit so closely. Our results cast light on the gross neural and endocast anatomy in lungfishes, and are likely to have particular significance for palaeoneurologists studying fossil taxa.
Figure 19 in A new Thai Mesozoic lungfish (Sarcopterygii, Dipnoi) with an insight into post-Palaeozoic dipnoan evolution
Figure 19. Histogram for the tree length distribution of all (nearly 654 × 106) possible trees using 12 terminal taxa and Dipterus as outgroup. The strict consensus tree of the 12 taxa is shown in the frame. The shortest tree length is 27 steps and the mean length of all trees is 44.95 steps (SD = 2.84). The skewness statistic, g1, is −0.745, indicating a strong phylogenetic signal of the data.
Figure 16 in A new Thai Mesozoic lungfish (Sarcopterygii, Dipnoi) with an insight into post-Palaeozoic dipnoan evolution
Figure 16. Schematic drawings and photographs showing three stages in the evolutionary trend of the 'hard snout' exemplified by Chirodipterus, Ferganoceratodus martini sp. nov. and Neoceratodus forsteri. The upper drawings show reconstructions of the structure in living fishes, the middle line drawings show the mineralized tissues as found in the fossil record and the lowest are photographs of actual specimens (Chirodipterus from Bemis & Northcutt, 1992: figure 24).
Figure 1. A in A new Thai Mesozoic lungfish (Sarcopterygii, Dipnoi) with an insight into post-Palaeozoic dipnoan evolution
Figure 1. A, Mesozoic formations of the Khorat Plateau with vertebrate assemblages. B, caption for the silhouettes in A. C, the Khorat Plateau, north-east Thailand (frame), with the extent of the Phu Kradung Fomation outcrops (in black) and the location of the Phu Nam Jun locality (white spot). Modified from Cavin et al. (2004).
Figure 6. Barwickia downunda a and b in The postcranial anatomy of two Middle Devonian lungfishes (Osteichthyes, Dipnoi) from Mt. Howitt, Victoria, Australia
Figure 6. Barwickia downunda a and b, AM F98074 body flattened showing postcranial skeleton and head: a, dorsal view; b, ventral view; c, MV P181784, showing details of tail and fins; d, MV P181784, photograph of tail and fins; e, MV P198044, internal support bones for first and second dorsal fins.
Figure 3 in The postcranial anatomy of two Middle Devonian lungfishes (Osteichthyes, Dipnoi) from Mt. Howitt, Victoria, Australia
Figure 3. Shoulder girdle: a, Barwickia downunda cleithrum and clavicle, MV P181890; b, Barwickia downunda with anterior ribs and neural spines, MV P198046; c, Howidipterus donnae exoskeletal shoulder girdle, MV P 181883; and d, also showing anocleithrum, MV P181792.
Data from: Lungfish diversity in Romer’s Gap: reaction to the end-Devonian extinction
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Data from: A new method for reconstructing brain morphology: applying the brain-neurocranial spatial relationship in an extant lungfish to a fossil endocast
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Data from: Brain – endocast relationship in the Australian lungfish, Neoceratodus forsteri, elucidated from tomographic data (Sarcopterygii: Dipnoi)
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Data from: Identifying heterogeneity in rates of morphological evolution: discrete character change in the evolution of lungfish (Sarcopterygii; Dipnoi)
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A single-cell atlas of West African lungfish respiratory system reveals evolutionary adaptations to terrestrialization
GEO Series GSE240094. Protopterus annectens. 48 samples. Type: Expression profiling by high throughput sequencing.
Figure 1 in The postcranial anatomy of two Middle Devonian lungfishes (Osteichthyes, Dipnoi) from Mt. Howitt, Victoria, Australia
Figure 1. Terminology used for axial skeleton components.
Figure 21 in The comparative osteology and phylogenetic relationships of African and South American lungfishes (Sarcopterygii: Dipnoi)
Figure 21. Occlusal view of the computed tomography reconstructions of the left and right pterygoids of extant lungfishes, anterior to the left: A, Lepidosiren paradoxa, CAS 61327; B, Protopterus annectens, TMM M 1129; C, Protopterus dolloi, AMNH 246385; D, Protopterus aethiopicus, UF 137272; E, Protopterus amphibius, CAS 47408; F, Neoceratodus forsteri, AMS I-40438-001. Scale bar: 5 mm.
Figure 29 in The comparative osteology and phylogenetic relationships of African and South American lungfishes (Sarcopterygii: Dipnoi)
Figure 29. Left ceratohyal of Protopterus annectens, AMNH 22455: A, lateral view, anterior to the left; B, medial view, anterior to the right. Scale bar: 5 mm.
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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)
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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.