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  • 1
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    Hibiscus fabiana sp. nov. (Malvaceae) from the Guinea Highlands (West Africa) (2020)
    Naturalis Biodiversity Center
    In:  Blumea: Biodiversity, Evolution and Biogeography of Plants vol. 65 no. 1, pp. 69-74
    Details
    Publication Date: 2024-06-23
    Description: Hibiscus fabiana Cheek (sect. Furcaria, Malvaceae) is described from the Guinea Highlands of West Africa, and its taxonomic affinities and ecology are considered. Hibiscus fabiana has previously been confused with H. rostellatus but has red fleshy calyx ribs (vs not red and non-fleshy), the calyx surface is glabrous apart from 1-armed bristles (vs densely covered in minute white stellate hairs and bristles 2–5-armed), the leaves 3(–5)-lobed, bases truncate to rounded (vs 5-lobed, cordate). The conservation status of the new species is assessed using the IUCN 2012 standard as Vulnerable. In the context of the recently discovered extinction of the Guinean endemic Inversodicraea pygmaea G.Taylor (Podostemaceae), we discuss the 30 new species to science discovered in Guinea since 2005, all but one of which are also range-restricted and threatened, usually by development or habitat loss. We consider it urgent to avoid their extinction, ideally with in situ conservation using an Important PlantAreas approach.
    Keywords: Plant Science ; Ecology ; Evolution ; Behavior and Systematics ; Bowal ; conservation ; Furcaria ; Guinea Highlands ; Hibiscus ; Important Plant Areas ; Simandou
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
    Format: application/pdf
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  • 2
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    The pharynx of the iconic stem-group chondrichthyan Acanthodes Agassiz, 1833 revisited with micro-computed tomography (2024)
    In:  Zoological Journal of the Linnean Society vol. 2024 no. XX
    Details
    Publication Date: 2024-06-23
    Description: Acanthodes has long been the primary source of information on the pharyngeal skeleton of ‘acanthodians’. Because of this its anatomy has played a disproportionate role in attempts to understand the evolution of the jawed vertebrate pharynx and the clade as a whole. However, the anatomy of the pharynx of Acanthodes, now understood to be a stem-group chondrichthyan, remains poorly characterized and subject to several com- peting interpretations. We used computed tomography to image the articulated pharyngeal skeletons of three specimens of Acanthodes confusus from Lebach, Germany. Acanthodes has a mélange of osteichthyan-like and chondrichthyan-like morphologies in its pharyngeal skeleton. Like many other chondrichthyans, Acanthodes lacked hypohyals, and had four pairs of posteriorly oriented pharyngobranchials. Like osteichthyans, Acanthodes possessed an interhyal, but lacked the separate infra- and supra-pharyngobranchial elements present in osteichthyans and the crown- chondrichthyan Ozarcus. Using these new data we built and animated a digital 3D model of the pharyngeal endoskeleton in Acanthodes, showing that the jaws could have swung outwards during the opening cycle, increasing the anteriorly facing area of the gape for suspension feeding. These new data provide a more definitive picture of the anatomy of a taxon that has long been of great significance in early vertebrate palaeontology.
    Keywords: acanthodian ; branchial skeleton ; chondrichthyan ; computed tomography ; Permian ; pharynx
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
    Format: application/pdf
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  • 3
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    Computed tomography analysis of multicorer SO268/2_107-1, core 15 (2024)
    PANGAEA
    Details
    Publication Date: 2024-06-23
    Description: Selected multicorer cores of R/V Sonne cruise SO268-2 were scanned by a Toshiba Aquilion 64 computer tomograph (CT) at the hospital Klinikum Bremen-Mitte with an x-ray source voltage of 120 kV and a current of 600 mA. The CT image stacks have a resolution of 0.35 mm in x/y-direction and 0.5 mm resolution in z-direction (0.3 mm reconstruction unit). Images were reconstructed using Toshiba's patented helical cone beam reconstruction technique (TCOT) and are provided in DICOM-format. The data were processed with the ZIB edition of the Amira software (version 2021.03; Stalling et al., 2005; http://amira.zib.de). Within Amira, the core liners, including about 2 mm of the core rims, were deleted from the data set. Mangan nodules with diameters 〉~1 mm, open bioturbation traces, an unidentified organism (only present in core SO268-2-200-1 MC18), the natural bioturbated and surficial homogenised sediment were segmented by a marker-based watershed segmentation and visualized in 3D. Subsequently, the sediment components were quantified (MaterialStatistics module; volume per slice) and the mean and standard deviation of the sediment x-ray attenuation (MaterialStatistics module; statistics per slice per label; to avoid marginal averaging effects the sediment label was reduced by three voxels) were determined.
    Keywords: Binary Object; Bioturbation; Bioturbation, volume; Center for Marine Environmental Sciences; Clarion-Clipperton Fraction Zone, North East Pacific Ocean; Computer tomography (CT) Toshiba Aquilion 64; DEPTH, sediment/rock; File content; JPI Oceans - Ecological Aspects of Deep-Sea Mining; JPIO-MiningImpact; Manganese nodules, relative volume; Manganese nodules, volume; MARUM; MUC; MUC-23; MultiCorer; Number of slice; Number of voxels, matrix sediment; Sediment, bioturbated lower layer, relative volume; Sediment, bioturbated lower layer, volume; Sediment, homogenized upper layer, relative volume; Sediment, homogenized upper layer, volume; SO268/2; SO268/2_107-1; Sonne_2; X-ray attenuation, matrix sediment, mean; X-ray attenuation, matrix sediment, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 11502 data points
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  • 4
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    Computed tomography analysis of multicorer SO268/2_122-1, core 14 (2024)
    PANGAEA
    Details
    Publication Date: 2024-06-23
    Description: Selected multicorer cores of R/V Sonne cruise SO268-2 were scanned by a Toshiba Aquilion 64 computer tomograph (CT) at the hospital Klinikum Bremen-Mitte with an x-ray source voltage of 120 kV and a current of 600 mA. The CT image stacks have a resolution of 0.35 mm in x/y-direction and 0.5 mm resolution in z-direction (0.3 mm reconstruction unit). Images were reconstructed using Toshiba's patented helical cone beam reconstruction technique (TCOT) and are provided in DICOM-format. The data were processed with the ZIB edition of the Amira software (version 2021.03; Stalling et al., 2005; http://amira.zib.de). Within Amira, the core liners, including about 2 mm of the core rims, were deleted from the data set. Mangan nodules with diameters 〉~1 mm, open bioturbation traces, an unidentified organism (only present in core SO268-2-200-1 MC18), the natural bioturbated and surficial homogenised sediment were segmented by a marker-based watershed segmentation and visualized in 3D. Subsequently, the sediment components were quantified (MaterialStatistics module; volume per slice) and the mean and standard deviation of the sediment x-ray attenuation (MaterialStatistics module; statistics per slice per label; to avoid marginal averaging effects the sediment label was reduced by three voxels) were determined.
    Keywords: Binary Object; Bioturbation; Bioturbation, volume; Center for Marine Environmental Sciences; Clarion-Clipperton Fraction Zone, North East Pacific Ocean; Computer tomography (CT) Toshiba Aquilion 64; DEPTH, sediment/rock; File content; JPI Oceans - Ecological Aspects of Deep-Sea Mining; JPIO-MiningImpact; Manganese nodules, relative volume; Manganese nodules, volume; MARUM; MUC-24; Multicorer with television; Number of slice; Number of voxels, matrix sediment; Sediment, bioturbated lower layer, relative volume; Sediment, bioturbated lower layer, volume; Sediment, homogenized upper layer, relative volume; Sediment, homogenized upper layer, volume; SO268/2; SO268/2_122-1; Sonne_2; TVMUC; X-ray attenuation, matrix sediment, mean; X-ray attenuation, matrix sediment, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 9480 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 5
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    Computed tomography analysis of multicorer SO268/2_107-1, core 11 (2024)
    PANGAEA
    Details
    Publication Date: 2024-06-23
    Description: Selected multicorer cores of R/V Sonne cruise SO268-2 were scanned by a Toshiba Aquilion 64 computer tomograph (CT) at the hospital Klinikum Bremen-Mitte with an x-ray source voltage of 120 kV and a current of 600 mA. The CT image stacks have a resolution of 0.35 mm in x/y-direction and 0.5 mm resolution in z-direction (0.3 mm reconstruction unit). Images were reconstructed using Toshiba's patented helical cone beam reconstruction technique (TCOT) and are provided in DICOM-format. The data were processed with the ZIB edition of the Amira software (version 2021.03; Stalling et al., 2005; http://amira.zib.de). Within Amira, the core liners, including about 2 mm of the core rims, were deleted from the data set. Mangan nodules with diameters 〉~1 mm, open bioturbation traces, an unidentified organism (only present in core SO268-2-200-1 MC18), the natural bioturbated and surficial homogenised sediment were segmented by a marker-based watershed segmentation and visualized in 3D. Subsequently, the sediment components were quantified (MaterialStatistics module; volume per slice) and the mean and standard deviation of the sediment x-ray attenuation (MaterialStatistics module; statistics per slice per label; to avoid marginal averaging effects the sediment label was reduced by three voxels) were determined.
    Keywords: Binary Object; Bioturbation; Bioturbation, volume; Center for Marine Environmental Sciences; Clarion-Clipperton Fraction Zone, North East Pacific Ocean; Computer tomography (CT) Toshiba Aquilion 64; DEPTH, sediment/rock; File content; JPI Oceans - Ecological Aspects of Deep-Sea Mining; JPIO-MiningImpact; Manganese nodules, relative volume; Manganese nodules, volume; MARUM; MUC; MUC-23; MultiCorer; Number of slice; Number of voxels, matrix sediment; Sediment, bioturbated lower layer, relative volume; Sediment, bioturbated lower layer, volume; Sediment, homogenized upper layer, relative volume; Sediment, homogenized upper layer, volume; SO268/2; SO268/2_107-1; Sonne_2; X-ray attenuation, matrix sediment, mean; X-ray attenuation, matrix sediment, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 10420 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 6
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    Computed tomography analysis of multicorer SO268/2_135-1, core 1 (2024)
    PANGAEA
    Details
    Publication Date: 2024-06-23
    Description: Selected multicorer cores of R/V Sonne cruise SO268-2 were scanned by a Toshiba Aquilion 64 computer tomograph (CT) at the hospital Klinikum Bremen-Mitte with an x-ray source voltage of 120 kV and a current of 600 mA. The CT image stacks have a resolution of 0.35 mm in x/y-direction and 0.5 mm resolution in z-direction (0.3 mm reconstruction unit). Images were reconstructed using Toshiba's patented helical cone beam reconstruction technique (TCOT) and are provided in DICOM-format. The data were processed with the ZIB edition of the Amira software (version 2021.03; Stalling et al., 2005; http://amira.zib.de). Within Amira, the core liners, including about 2 mm of the core rims, were deleted from the data set. Mangan nodules with diameters 〉~1 mm, open bioturbation traces, an unidentified organism (only present in core SO268-2-200-1 MC18), the natural bioturbated and surficial homogenised sediment were segmented by a marker-based watershed segmentation and visualized in 3D. Subsequently, the sediment components were quantified (MaterialStatistics module; volume per slice) and the mean and standard deviation of the sediment x-ray attenuation (MaterialStatistics module; statistics per slice per label; to avoid marginal averaging effects the sediment label was reduced by three voxels) were determined.
    Keywords: Binary Object; Bioturbation; Bioturbation, volume; Center for Marine Environmental Sciences; Clarion-Clipperton Fraction Zone, North East Pacific Ocean; Computer tomography (CT) Toshiba Aquilion 64; DEPTH, sediment/rock; File content; JPI Oceans - Ecological Aspects of Deep-Sea Mining; JPIO-MiningImpact; Manganese nodules, relative volume; Manganese nodules, volume; MARUM; MUC; MUC-27; MultiCorer; Number of slice; Number of voxels, matrix sediment; Sediment, bioturbated lower layer, relative volume; Sediment, bioturbated lower layer, volume; Sediment, homogenized upper layer, relative volume; Sediment, homogenized upper layer, volume; SO268/2; SO268/2_135-1; Sonne_2; X-ray attenuation, matrix sediment, mean; X-ray attenuation, matrix sediment, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 11056 data points
    Location Call Number Expected Availability
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  • 7
    facet.materialart.
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    Computed tomography analysis of multicorer SO268/2_135-1, core 2 (2024)
    PANGAEA
    Details
    Publication Date: 2024-06-23
    Description: Selected multicorer cores of R/V Sonne cruise SO268-2 were scanned by a Toshiba Aquilion 64 computer tomograph (CT) at the hospital Klinikum Bremen-Mitte with an x-ray source voltage of 120 kV and a current of 600 mA. The CT image stacks have a resolution of 0.35 mm in x/y-direction and 0.5 mm resolution in z-direction (0.3 mm reconstruction unit). Images were reconstructed using Toshiba's patented helical cone beam reconstruction technique (TCOT) and are provided in DICOM-format. The data were processed with the ZIB edition of the Amira software (version 2021.03; Stalling et al., 2005; http://amira.zib.de). Within Amira, the core liners, including about 2 mm of the core rims, were deleted from the data set. Mangan nodules with diameters 〉~1 mm, open bioturbation traces, an unidentified organism (only present in core SO268-2-200-1 MC18), the natural bioturbated and surficial homogenised sediment were segmented by a marker-based watershed segmentation and visualized in 3D. Subsequently, the sediment components were quantified (MaterialStatistics module; volume per slice) and the mean and standard deviation of the sediment x-ray attenuation (MaterialStatistics module; statistics per slice per label; to avoid marginal averaging effects the sediment label was reduced by three voxels) were determined.
    Keywords: Binary Object; Bioturbation; Bioturbation, volume; Center for Marine Environmental Sciences; Clarion-Clipperton Fraction Zone, North East Pacific Ocean; Computer tomography (CT) Toshiba Aquilion 64; DEPTH, sediment/rock; File content; JPI Oceans - Ecological Aspects of Deep-Sea Mining; JPIO-MiningImpact; Manganese nodules, relative volume; Manganese nodules, volume; MARUM; MUC; MUC-27; MultiCorer; Number of slice; Number of voxels, matrix sediment; Sediment, bioturbated lower layer, relative volume; Sediment, bioturbated lower layer, volume; Sediment, homogenized upper layer, relative volume; Sediment, homogenized upper layer, volume; SO268/2; SO268/2_135-1; Sonne_2; X-ray attenuation, matrix sediment, mean; X-ray attenuation, matrix sediment, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 10352 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 8
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    Computed tomography analysis of multicorer SO268/2_135-1, core 20 (2024)
    PANGAEA
    Details
    Publication Date: 2024-06-23
    Description: Selected multicorer cores of R/V Sonne cruise SO268-2 were scanned by a Toshiba Aquilion 64 computer tomograph (CT) at the hospital Klinikum Bremen-Mitte with an x-ray source voltage of 120 kV and a current of 600 mA. The CT image stacks have a resolution of 0.35 mm in x/y-direction and 0.5 mm resolution in z-direction (0.3 mm reconstruction unit). Images were reconstructed using Toshiba's patented helical cone beam reconstruction technique (TCOT) and are provided in DICOM-format. The data were processed with the ZIB edition of the Amira software (version 2021.03; Stalling et al., 2005; http://amira.zib.de). Within Amira, the core liners, including about 2 mm of the core rims, were deleted from the data set. Mangan nodules with diameters 〉~1 mm, open bioturbation traces, an unidentified organism (only present in core SO268-2-200-1 MC18), the natural bioturbated and surficial homogenised sediment were segmented by a marker-based watershed segmentation and visualized in 3D. Subsequently, the sediment components were quantified (MaterialStatistics module; volume per slice) and the mean and standard deviation of the sediment x-ray attenuation (MaterialStatistics module; statistics per slice per label; to avoid marginal averaging effects the sediment label was reduced by three voxels) were determined.
    Keywords: Binary Object; Bioturbation; Bioturbation, volume; Center for Marine Environmental Sciences; Clarion-Clipperton Fraction Zone, North East Pacific Ocean; Computer tomography (CT) Toshiba Aquilion 64; DEPTH, sediment/rock; File content; JPI Oceans - Ecological Aspects of Deep-Sea Mining; JPIO-MiningImpact; Manganese nodules, relative volume; Manganese nodules, volume; MARUM; MUC; MUC-27; MultiCorer; Number of slice; Number of voxels, matrix sediment; Sediment, bioturbated lower layer, relative volume; Sediment, bioturbated lower layer, volume; Sediment, homogenized upper layer, relative volume; Sediment, homogenized upper layer, volume; SO268/2; SO268/2_135-1; Sonne_2; X-ray attenuation, matrix sediment, mean; X-ray attenuation, matrix sediment, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 12212 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 9
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    Unknown
    Computed tomography analysis of multicorer SO268/2_200-1, core 12 (2024)
    PANGAEA
    Details
    Publication Date: 2024-06-23
    Description: Selected multicorer cores of R/V Sonne cruise SO268-2 were scanned by a Toshiba Aquilion 64 computer tomograph (CT) at the hospital Klinikum Bremen-Mitte with an x-ray source voltage of 120 kV and a current of 600 mA. The CT image stacks have a resolution of 0.35 mm in x/y-direction and 0.5 mm resolution in z-direction (0.3 mm reconstruction unit). Images were reconstructed using Toshiba's patented helical cone beam reconstruction technique (TCOT) and are provided in DICOM-format. The data were processed with the ZIB edition of the Amira software (version 2021.03; Stalling et al., 2005; http://amira.zib.de). Within Amira, the core liners, including about 2 mm of the core rims, were deleted from the data set. Mangan nodules with diameters 〉~1 mm, open bioturbation traces, an unidentified organism (only present in core SO268-2-200-1 MC18), the natural bioturbated and surficial homogenised sediment were segmented by a marker-based watershed segmentation and visualized in 3D. Subsequently, the sediment components were quantified (MaterialStatistics module; volume per slice) and the mean and standard deviation of the sediment x-ray attenuation (MaterialStatistics module; statistics per slice per label; to avoid marginal averaging effects the sediment label was reduced by three voxels) were determined.
    Keywords: Binary Object; Bioturbation; Bioturbation, volume; Center for Marine Environmental Sciences; Clarion-Clipperton Fraction Zone, North East Pacific Ocean; Computer tomography (CT) Toshiba Aquilion 64; DEPTH, sediment/rock; File content; JPI Oceans - Ecological Aspects of Deep-Sea Mining; JPIO-MiningImpact; Manganese nodules, relative volume; Manganese nodules, volume; MARUM; MUC-40; Multicorer with television; Number of slice; Number of voxels, matrix sediment; Sediment, bioturbated lower layer, relative volume; Sediment, bioturbated lower layer, volume; Sediment, homogenized upper layer, relative volume; Sediment, homogenized upper layer, volume; SO268/2; SO268/2_200-1; Sonne_2; TVMUC; X-ray attenuation, matrix sediment, mean; X-ray attenuation, matrix sediment, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 9784 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 10
    facet.materialart.
    Unknown
    Computed tomography analysis of multicorer SO268/2_207-1, core 5 (2024)
    PANGAEA
    Details
    Publication Date: 2024-06-23
    Description: Selected multicorer cores of R/V Sonne cruise SO268-2 were scanned by a Toshiba Aquilion 64 computer tomograph (CT) at the hospital Klinikum Bremen-Mitte with an x-ray source voltage of 120 kV and a current of 600 mA. The CT image stacks have a resolution of 0.35 mm in x/y-direction and 0.5 mm resolution in z-direction (0.3 mm reconstruction unit). Images were reconstructed using Toshiba's patented helical cone beam reconstruction technique (TCOT) and are provided in DICOM-format. The data were processed with the ZIB edition of the Amira software (version 2021.03; Stalling et al., 2005; http://amira.zib.de). Within Amira, the core liners, including about 2 mm of the core rims, were deleted from the data set. Mangan nodules with diameters 〉~1 mm, open bioturbation traces, an unidentified organism (only present in core SO268-2-200-1 MC18), the natural bioturbated and surficial homogenised sediment were segmented by a marker-based watershed segmentation and visualized in 3D. Subsequently, the sediment components were quantified (MaterialStatistics module; volume per slice) and the mean and standard deviation of the sediment x-ray attenuation (MaterialStatistics module; statistics per slice per label; to avoid marginal averaging effects the sediment label was reduced by three voxels) were determined.
    Keywords: Binary Object; Bioturbation; Bioturbation, volume; Center for Marine Environmental Sciences; Clarion-Clipperton Fraction Zone, North East Pacific Ocean; Computer tomography (CT) Toshiba Aquilion 64; DEPTH, sediment/rock; File content; JPI Oceans - Ecological Aspects of Deep-Sea Mining; JPIO-MiningImpact; Manganese nodules, relative volume; Manganese nodules, volume; MARUM; MUC-41; Multicorer with television; Number of slice; Number of voxels, matrix sediment; Sediment, bioturbated lower layer, relative volume; Sediment, bioturbated lower layer, volume; Sediment, homogenized upper layer, relative volume; Sediment, homogenized upper layer, volume; SO268/2; SO268/2_207-1; Sonne_2; TVMUC; X-ray attenuation, matrix sediment, mean; X-ray attenuation, matrix sediment, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 11584 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
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