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An interactive radiocarbon database for the Canary Islands
<p>The dataset described in this work represents the first open-access compilation of uncalibrated radiocarbon dates for the archaeology of Canary Islands</p>
ERT data collected at the Corona volcano (Lanzarote, Canary Islands) during the European Space Agency (ESA) testing campaign PANGAEA-X 2017
<p>This dataset contains the ERT (Electrical Resistivity Tomography) data collected between 22 and 23 November 2017 at the Corona volcano (Lanzarote, Canary Islands, Fig. 1) for the detection of lava tubes and the stratigraphic investigation of planetary volcanic analogues. This geophysical survey was carried out within the European Space Agency (ESA) testing campaign PANGAEA-X 2017 (Bessone et al., 2018), aimed at integrating astronaut training-data collection, documentation, analogue field geology procedures with remote sensing and in situ geophysical methods. </p> <p>Two ERT profiles were acquired in NE-SW and NNE-SSW orientations (Fig. 1). These were located roughly orthogonal to the Corona lava tube system and as far as possible on top of the main lava tube axes. The longer profile, profile D, is 470 m in length and was obtained using 48 electrodes spaced 10 m apart. The profile orientation is from SW to NE (electrode 1 to 48). The profile was acquired to detect lava tubes in test site D (sub-area south) where the exact location of a lava tube was known thanks to a LiDAR TLS (Terrestrial Laser Scan) subsurface survey (Santagata et al., 2018). A shorter profile, profile E, is 235 m long and was obtained using 48 electrodes 5 m apart. The profile orientation is from SSW to NNE (electrode 1 to 48). This profile was acquired in test site E (sub-area north) to provide a more detailed investigation of the potential existence of inaccessible sections of the tube whose location could be indicated by the evidence of closely-spaced aligned collapse structures.</p> <p>Each profile was collected using measure sequences compounded by 276 Wenner-Schlumberger array quadrupoles which ensure high vertical resolution and signal amplitude and 328 dipole-dipole array quadrupoles which provide enhanced lateral resolution. A fully automatic multi-electrode resistivity meter SYSCAL Jr Switch-48 by IRIS Instruments (400 V max output voltage, 1200 mA max output current, 100 W max output power, <a href="http://www.iris-instruments.com/syscal-juniorsw.html">http://www.iris-instruments.com/syscal-juniorsw.html</a>), was used for data collection.</p> <p>At most of the measurement points, it was necessary to drill the basalt using a hand drilling machine in order to place the tips of the electrodes into the ground at a depth of approximately 40 cm. The electrodes also needed to kept moist to reduce contact resistance between the electrode and the ground. A large amount of water (up to 2 liters per point) was needed for profile D, situated in an area above the lava tubes with very porous dry soil cover.</p> <p>The dataset is presented as a spreadsheet format which has the "space" as separator and the ".txt" extension. The structure of such a file is the following one:</p> <p>#, El array, Spa1/4, Rho, Dev, M, Sp, Vp, In, Time, Spa5/12, M1/20</p> <p>- #: Data point number</p> <p>- El array: Electrode array</p> <p>- Spa. 1/4: four spacing parameters (corresponding to the electrode array – in m)</p> <p>- Rho: resistivity value (in Ohm.m)</p> <p>- Dev: standard deviation (quality factor, in %)</p> <p>- M: global chargeability value (induced polarization parameter (in mV/V – "=0" if only-resistivity data))</p> <p>- Sp: spontaneous polarization (measured just before the injection, in mV)</p> <p>- Vp: measured primary voltage (in mV)</p> <p>- In: injected current intensity (in mA)</p> <p>- Time: injection time (pulse duration, in s)</p> <p>- Spa. 5/8: other spacing parameters (in m)</p> <p>- Spa. 9/12: electrode elevation (in m)</p> <p>- M1/M20: partial chargeability values (induced polarization window (in mV/V – "=0" if only-resistivity data))</p> <p> </p> <p>Acknowledgements</p> <p>The authors are grateful to ESA and all PANGAEA-X 2017 staff, particularly Loredana Bessone, Matthias Maurer, Herve Stevenin and Igor Drozdovskiy for their participation in data collection during some of the experiments and to the MilesBeyond Team, particularly Francesco Maria Sauro for his logistical support. Regional and local remote sensing data were obtained by the Spanish Instituto Geográfico Nacional (https://www.ign.es) and Gobierno de Canarias (https://www.grafcan.es, <a href="https://opendata.sitcan.es/">https://opendata.sitcan.es</a>).</p> <p> </p> <p>References</p> <p>Bessone, L., et al., 2018, Testing technologies and operational concepts for field geology exploration of the Moon and beyond: the ESA PANGAEA-X campaign, Geophysical Research Abstract, #EGU2018-4013.</p> <p>Santagata, T., Sauro, F., Massironi, M., Pozzobon, R., Del Vecchio, U., Lazzaroni, M., Damiano, N., Tonello, M., Tomasi, I., Martínez-Frìas, J. and Mateo Medero, E., 2018. Subsurface laser scanning and photogrammetry in the Corona Lava Tube System, Lanzarote, Spain, EGU General Assembly 2018, pp. EGU2018-5290.</p>
Figure 3. Diplecogaster tonstricula n in Diplecogaster tonstricula, a new species of cleaning clingfish (Teleostei: Gobiesocidae) from the Canary Islands and Senegal, eastern Atlantic Ocean, with a review of the Diplecogaster-ctenocrypta species-group
Figure 3. Diplecogaster tonstricula n. sp., CCML uncat., paratype, specimen 1, 22.9 mm SL. Head lateral line system. (A) Dorsal view of head; (B) ventral view of head. Bar 1 mm.
Fig. 1 in Flower-visiting behaviour and habitats of the taxa of the Andrena wollastoni group (Hymenoptera, Anthophila, Micrandrena) on the Canary Islands compared to the Madeira Archipelago *
Fig. 1: (a) Typical crop-field margin with Hirschfeldia incana and Calendula arvensis, both frequently visited by Andrena catula (northern part of Gran Canaria, Zone IIb, 12th March 2018); photo: A. Schwabe. (b) Slope with ruderal vegetation (H. incana, frequently visited by A. g. gomerensis; additionally, Echium plantagineum and Psoralea bituminosa can be seen) with a grazed vegetation complex in the background (La Gomera, Zone IIb, 24th April 2016); photo: A. Schwabe. c: Road margin in the Teno area, with H. incana (frequently visited by A. a. tenoensis; additionally, E. plantagineum and Galactites tomentosus) (Tenerife, Zone IIA, 21st April 2016); photo: A. Schwabe. (d) A. a. tenoensis (female), collecting pollen on H. incana (margin of a small trail in the Teno area) (Tenerife, Zone IIA, 21st April 2016); photo: A. Schwabe.
Fig. 2 in Flower-visiting behaviour and habitats of the taxa of the Andrena wollastoni group (Hymenoptera, Anthophila, Micrandrena) on the Canary Islands compared to the Madeira Archipelago *
Fig. 2: (a) Habitat of the 'Cordillera Dorsal' species Descurainia lemsii, which is frequently visited by A. a. wildpreti (upper pine forest complex with rocky slopes, Zone III). Bottom right (not visited by A. a. wildpreti): Sideritis oroteneriffae ('Cordillera Dorsal' species); foreground: Adenocarpus viscosus (Tenerife, Montaña Ayosa; 22nd May 2019); photo: A. Schwabe. (b) Close-up of flowering and fruiting D. lemsii on a margin of rocky slopes in the Pinus canariensis forest complex (Tenerife, Montaña Ayosa; 26th May 2019); photo: A. Schwabe. (c) A. a. wildpreti (female, body length 7.7 mm); site and date of Fig. 2b; photo: A. Kratochwil. (d) Habitat of A. lineolata, visiting mainly D. bourgaeana (foreground) and Cytisus supranubius (white, background) (Tenerife, below Izaña, Teide area; Zone IV; 21st May 2019); photo: A. Schwabe.
Figure 2 in Parallel evolution in molar outline of murine rodents: the case of the extinct Malpaisomys insularis (Eastern Canary Islands)
Figure 2. Schematic representation of the modern and fossil murine rodents compared to Malpaisomys. Top, molecular phylogeny after Chevret (1994) and Chevret et al. (2001). A calibration of the time of divergence between taxa is given by reference to the divergence of the Rattus rattus lineage, estimated as having occurred 12 Mya (Chevret et al., 2001). The grey box includes the arvicanthine rodents, characterized by a herbivorous diet. Bottom, fossil lineages with investigated localities. Thick grey lines indicate taxa with stephanodont characteristics, thick black lines, complete stephanodonty. Crosses indicate extinct taxa.
Figure 1 in Amphi-Atlantic distribution of the Mancocumatinae (Cumacea: Bodotriidae), with description of a new genus dwelling in marine lava caves of Tenerife (Canary Islands)
Figure 1. Speleocuma guanche gen. et sp. nov. A, Ovigerous female, whole animal in lateral view. B, Adult male, whole animal in lateral view.
Figure 4 in Amphi-Atlantic distribution of the Mancocumatinae (Cumacea: Bodotriidae), with description of a new genus dwelling in marine lava caves of Tenerife (Canary Islands)
Figure 4. Speleocuma guanche gen. et sp. nov., ovigerous female. A, Right mandible. B, Pars incisa of the left mandible showing the lacinia mobilis. C, Maxillule. D, Maxilla. E, Maxilliped 1.
Figure 3 in Amphi-Atlantic distribution of the Mancocumatinae (Cumacea: Bodotriidae), with description of a new genus dwelling in marine lava caves of Tenerife (Canary Islands)
Figure 3. Speleocuma guanche gen. et sp. nov., ovigerous female A, Antenna 1. B, Maxilliped 2. C, Maxilliped 3. D, Pereopod 2. E, Pereopod 3. F, Pereopod 4. G, Last abdominal somite and uropod.
Figure 2 in Amphi-Atlantic distribution of the Mancocumatinae (Cumacea: Bodotriidae), with description of a new genus dwelling in marine lava caves of Tenerife (Canary Islands)
Figure 2. Speleocuma guanche gen. et sp. nov., preadult female, SEM micrographs. A, Anterior half of the carapace. B, Microstructure of the carapace showing the denticulate scales.
Figure 5 in Amphi-Atlantic distribution of the Mancocumatinae (Cumacea: Bodotriidae), with description of a new genus dwelling in marine lava caves of Tenerife (Canary Islands)
Figure 5. Speleocuma guanche gen. et sp. nov., adult male. A, Antennae 1 and 2. B, Mandible. C, Maxilula. D, Maxila. E, Maxilliped 2. F, Maxilliped 3. G, Pereopod 2. H, Pereopod 3. I, Pereopod 4. J, Pleopod. K, Uropod.
Figure 5 in Halacaridae (Acari) from Tenerife (Canary Islands)
Figure 5. Light-microscope images of halacarid species from Tenerife – A & B. Agaue adriatica (female) – Medial view of: tarsus I (A), telofemur I (B); C & D. Agauopsis tricuspis (male) – Medial view of: tarsus I (C), telofemur I (D); E–G. Halacarus actenos (male) – tarsus IV (E), integument (F), tip of gnathosoma (G); Rhombognathus procerus: H & J – female, I & K – male, ventral view of gnathosoma (H), genital openings (I, J, K).
Figure 9. Halacarus actenos Trouessart, 1889 in Halacaridae (Acari) from Tenerife (Canary Islands)
Figure 9. Halacarus actenos Trouessart, 1889 (male) – A. Dorsal view of idiosoma; B. Ventral view of idiosoma; C. Lateral view of palp; D. Chelicera; E. Medial view of leg I (Scale bars: A, B, E: 100 µm, C, D: 50 µm).
Figure 3 in Halacaridae (Acari) from Tenerife (Canary Islands)
Figure 3. Light-microscope images of halacarid species from Tenerife – A. Agaue adriatica (female); B. Agauopsis brevipalpus (female); C. Agauopsis microhyncha (male); D. Agauopsis tricuspis (male); E. Copidognathus lamelloides (male); F. Copidognathus magnipalpus (male); G. Copidognathus remipes (male); H. Halacarus actenos (male); I. Halacarus subtilis (female) (Scale bars: 100 µm).
Figure 6 in Halacaridae (Acari) from Tenerife (Canary Islands)
Figure 6. Light-microscope images of halacarid species from Tenerife – A. Medial view of leg I (Halacaropsis hirsuta- male), B. genital opening (H. hirsuta- male); C–E. Halacarus subtilis, anterior dorsal plate (C), ocular plate (D), posterior dorsal plate (E).
Figure 11. Rhombognathus procerus Bartsch, 1975 – A in Halacaridae (Acari) from Tenerife (Canary Islands)
Figure 11. Rhombognathus procerus Bartsch, 1975 – A. Dorsal view of idiosoma (female); B. Ventral view of idiosoma (female); C. Ventral view of gnathosoma (female); D. Detailed genital opening (male) (Scale bars: A–C: 100 µm, D: 50 µm).
Figure 2 in Review of the family Serranidae (Perciformes) from the Canary Islands (eastern-central Atlantic), with the first records of Serranus hepatus and Epinephelus aeneus
Figure 2. – Serranus hepatus from Tenerife, Canary Islands (GBIF-CFM-IEOCA 1199, 86.0 mm TL, 69.2 mm SL) (Credits: J.F. González-Jiménez, 2020).
Figure 1 in Review of the family Serranidae (Perciformes) from the Canary Islands (eastern-central Atlantic), with the first records of Serranus hepatus and Epinephelus aeneus
Figure 1. – The Canary Islands. Collection and sighting locations: (Ê) Serranus hepatus; (■) Epinephelus aeneus; (●) Epinephelus costae (map adapted from BlueChart Atlantic v9.5).
Figure 3 in Merluccius polli and M. senegalensis (Merlucciidae) as first records from the Canary Islands (north-eastern Atlantic), with morphology data
Figure 3. – Radiographs of M. senegalensis from the Canary Islands (TFMCBM-VP/01449, adult, 804 mm TL). Insert: Detail of five cervical vertebrae.
Figure 2 in Merluccius polli and M. senegalensis (Merlucciidae) as first records from the Canary Islands (north-eastern Atlantic), with morphology data
Figure 2. – Radiographs of M. polli from the Canary Islands (TFMCBM-VP/01952, maturing female, 624 mm TL). Insert: Detail of five cervical vertebrae.
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These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
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International Brain Laboratory public data
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OpenNeuro
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