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443 results for “Cephalopod”
Fig. 40 in Early-Middle Ordovician cephalopods from Ny Friesland, Spitsbergen - a pelagic fauna with Laurentian affinities
Fig. 40. Diagrams of relative siphuncular diameter and relative siphuncular distance of Eosomichelinoceras borealis gen. et sp. nov. from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. See Supp. file 1 for details of measurements.
Supplementary 1: Underwater photogrammetry for close-range 3D imaging of dry-sensitive objects: The case study of cephalopod beaks
<ul> <li>Technical advances in 3D imaging have contributed to quantifying and understanding biological variability and complexity. However, small, dry-sensitive objects are not easy to reconstruct using common and easily available techniques such as photogrammetry, surface scanning, or micro-CT scanning. Here we use cephalopod beaks as an example as their size, thickness, transparency, and dry-sensitive nature make them particularly challenging. We developed a new, underwater, photogrammetry protocol in order to add these types of biological structures to the panel of photogrammetric possibilities.</li> <li>We used a camera with a macro-photography mode in a waterproof housing fixed in a tank with clear water. The beak was painted and fixed on a colored rotating support. Three angles of view, two acquisitions, and around 300 pictures per specimen were taken in order to reconstruct a full 3D-model. These models were compared to others obtained with micro-CT scanning to verify their accuracy.</li> <li>The models can be obtained quickly and cheaply compared to micro-CT scanning, and have sufficient precision for quantitative inter-specific morphological analyses. Our work shows that underwater photogrammetry is a fast, non-invasive, efficient, and accurate way to reconstruct 3D models of dry-sensitive objects while conserving their shape. While the reconstruction of the shape is accurate, some internal parts cannot be reconstructed with photogrammetry as they are not visible. In contrast, these structures are visible using reconstructions based on micro-CT scanning. The mean difference between both methods is very small (10<sup>-5</sup> to 10<sup>-4</sup> mm) and is significantly lower than differences between meshes of different individuals.</li> <li>This photogrammetry protocol is portable, easy-to-use, fast, and reproducible. Micro-CT scanning, in contrast, is time-consuming, expensive and non-portable. This protocol can be applied to reconstruct the 3D shape of many other dry-sensitive objects such as shells of shellfish, cartilage, plants and other chitinous materials.</li> </ul>
Figure 8 from: Wittmann KJ, Griffiths CL (2017) Three new species of Heteromysis (Mysida, Mysidae, Heteromysini) from the Cape Peninsula, South Africa, with first documentation of a mysid-cephalopod association. ZooKeys 685: 15-47. https://doi.org/10.3897/zookeys.685.13890
Figure 8 - Heteromysis fosteri sp. n., paratype male (A, F–H) with 6.0 mm body length and paratype female 8.0 mm (B–E). A male tarsus with part of merus pertaining to third thoracic endopod, caudal aspect B the same for female, detail (C) shows subbasally toothed seta D tarsus of fourth thoracic endopod, caudal, detail (E) shows subbasally toothed seta F eighth thoracopod with penis, caudal G third male pleopod, rostral H telson, dorsal.
Figure 9 from: Wittmann KJ, Griffiths CL (2017) Three new species of Heteromysis (Mysida, Mysidae, Heteromysini) from the Cape Peninsula, South Africa, with first documentation of a mysid-cephalopod association. ZooKeys 685: 15-47. https://doi.org/10.3897/zookeys.685.13890
Figure 9 - A subadult female of Heteromysis octopodis sp. n. with 11 mm body length from tide pool B multi-species association inside den in 3 m depth, occupied by Octopus vulgaris, to the right with the crab Guinusia chabrus; upper arrow points to a mysid school of what we assume to be H. octopodis sp. n., lower arrow to a different but undetermined mysid species. A, B from Miller's Point, Cape Peninsula, South Africa; in situ images by Craig Foster B image is taken of the same octopus den from which the samples were collected, but on a different date.
Figure 5 from: Wittmann KJ, Griffiths CL (2017) Three new species of Heteromysis (Mysida, Mysidae, Heteromysini) from the Cape Peninsula, South Africa, with first documentation of a mysid-cephalopod association. ZooKeys 685: 15-47. https://doi.org/10.3897/zookeys.685.13890
Figure 5 - Heteromysis cancelli sp. n., paratype male with 6.9 mm body length (A, C–E), paratype female 6.4 mm (B, F) A eighth thoracopod with penis, caudal aspect B tarsus of female eighth thoracic endopod, caudal C uropods, dorsal D telson, dorsal E, F terminal margin of sixth pleonite, lateral, in male (E) versus female (F).
Figure 7 from: Wittmann KJ, Griffiths CL (2017) Three new species of Heteromysis (Mysida, Mysidae, Heteromysini) from the Cape Peninsula, South Africa, with first documentation of a mysid-cephalopod association. ZooKeys 685: 15-47. https://doi.org/10.3897/zookeys.685.13890
Figure 7 - Heteromysis fosteri sp. n., paratype females with 7.0 mm (A) and 8.0 mm (C–H, L) body length, paratype male 6.0 mm (B, J, K). A cephalic region plus anterior part of carapace in female, dorsal view B male antennula, dorsal C epipod of first thoracopod, caudal D–H series of dactylus with claw in thoracic endopods 1, 3-5, 8 of female, caudal J tip of claw of third thoracic endopod in male K, L terminal margin of sixth pleonite, lateral, in male (K) versus female (L) M nauplioid larva at substage 3, lateral.
Figure 4 from: Wittmann KJ, Griffiths CL (2017) Three new species of Heteromysis (Mysida, Mysidae, Heteromysini) from the Cape Peninsula, South Africa, with first documentation of a mysid-cephalopod association. ZooKeys 685: 15-47. https://doi.org/10.3897/zookeys.685.13890
Figure 4 - Heteromysis cancelli sp. n., paratype male with 6.9 mm body length (A, F–J), paratypes female 6.1 mm (B, C) and 6.4 mm (D, E). A male third thoracopod, caudal aspect B tarsus of female thoracic endopod 3, rostral, detail (C) shows modified seta D fourth thoracopod, rostral, detail (E) shows modified seta F tarsus of sixth thoracic endopod, rostral G–J series of male pleopods 1, 4, 5, rostral.
Figure 6 from: Wittmann KJ, Griffiths CL (2017) Three new species of Heteromysis (Mysida, Mysidae, Heteromysini) from the Cape Peninsula, South Africa, with first documentation of a mysid-cephalopod association. ZooKeys 685: 15-47. https://doi.org/10.3897/zookeys.685.13890
Figure 6 - Microphotographs of adult female of Heteromysis fosteri sp. n. with 7 mm body length (A) and of adult male of Heteromysis octopodis sp. n. with 9 mm (B), each from Miller's Point, Cape Peninsula, South Africa. A laboratory photo by C.L. Griffiths B in situ image by Craig Foster, this last with background cleaned with electronic tools.
Figure 1 from: Wittmann KJ, Griffiths CL (2017) Three new species of Heteromysis (Mysida, Mysidae, Heteromysini) from the Cape Peninsula, South Africa, with first documentation of a mysid-cephalopod association. ZooKeys 685: 15-47. https://doi.org/10.3897/zookeys.685.13890
Figure 1 - Ex-situ microphotographs of Heteromysis cancelli sp. n. from False Bay, Simonstown, Cape Peninsula, South Africa; adult males with 6–7 mm body length in lateral (A) or in dorsal view (B), respectively. Aquarium photos by C.L. Griffiths.
Figure 3 from: Wittmann KJ, Griffiths CL (2017) Three new species of Heteromysis (Mysida, Mysidae, Heteromysini) from the Cape Peninsula, South Africa, with first documentation of a mysid-cephalopod association. ZooKeys 685: 15-47. https://doi.org/10.3897/zookeys.685.13890
Figure 3 - Heteromysis cancelli sp. n., paratype female with 6.4 mm body length (A, C, D, H, J, L, M) with one of its larvae (N), paratype male 6.9 mm (B, E–G, K). A maxilla, caudal B first thoracopod, caudal aspect, with thoracic sternites 1-8, ventral C second maxilliped, ventral, detail (D) shows modified seta E–M series of dactylus in thoracic endopods 1-8 with claw (if present), caudal N nauplioid larva at late substage 2, lateral.
Figure 10 from: Wittmann KJ, Griffiths CL (2017) Three new species of Heteromysis (Mysida, Mysidae, Heteromysini) from the Cape Peninsula, South Africa, with first documentation of a mysid-cephalopod association. ZooKeys 685: 15-47. https://doi.org/10.3897/zookeys.685.13890
Figure 10 - Heteromysis octopodis sp. n., paratype adult male with 8.8 mm body length (A, D–K), paratype subadult females with 9.0 mm (B, L) and 8.8 mm (C). A cephalic region plus anterior part of carapace in male, dorsal view B anterior margin of antennular trunk in subadult female, dorsal C epipod of first thoracopod, caudal D–H series of dactylus with claw in thoracic endopods 1, 3-5, 8, caudal J fourth male pleopod, rostral K, L terminal margin of sixth pleonite, lateral, in male (K) versus subadult female (L).
Figure 11 from: Wittmann KJ, Griffiths CL (2017) Three new species of Heteromysis (Mysida, Mysidae, Heteromysini) from the Cape Peninsula, South Africa, with first documentation of a mysid-cephalopod association. ZooKeys 685: 15-47. https://doi.org/10.3897/zookeys.685.13890
Figure 11 - Heteromysis octopodis sp. n., paratype adult male with 8.8 mm body length. A tarsus with part of merus pertaining to third thoracic endopod, caudal aspect, details show subbasally toothed seta on merus (B) versus subbasally barbed seta on carpus (C) D tarsus with part of merus pertaining to fourth thoracic endopod, caudal, detail (E) shows subbasally toothed seta F eighth thoracopod with penis, caudal G telson, dorsal.
Figure 2 from: Wittmann KJ, Griffiths CL (2017) Three new species of Heteromysis (Mysida, Mysidae, Heteromysini) from the Cape Peninsula, South Africa, with first documentation of a mysid-cephalopod association. ZooKeys 685: 15-47. https://doi.org/10.3897/zookeys.685.13890
Figure 2 - Heteromysis cancelli sp. n., paratype male with 6.9 mm body length (A, E–H), paratype female 6.4 mm (B–D, J). A, B cephalic region plus carapace in male (A) versus female (B), dorsal view, details show pore groups (C, D) on carapace E male antennula, dorsal F labrum, obliquely ventral G mandibles with right palpus, caudal H labium, ventral J maxillula, caudal.
Fig. 8. A–G in Variability of conch morphology in a cephalopod species from the Cambrian to Ordovician transition strata of Siberia
Fig. 8. A–G. Phosphatised siphuncle connecting rings of ellesmeroceratid nautiloids (interpreted below as Ruthenoceras elongatum Korde, 1949) from sample Ang-6, block No. 2, probably latest Furongian Ust-kut Formation found at Pashino on the Angara River, Siberia, Russia. ZPAL N. IV/152, 148, 147, 153, 151, 149, 150, respectively. Specimens in dorsal views, also details in higher magnification (B2 and B3; see also Dzik 2010: fig. 7f), except ventral (E1) and lateral (E2) views. ZPAL N. IV/148 and 150 (see also Dzik 2010: fig. 7b and c). H. For comparison the earliest Cambrian (Tommotian) " hyolith" Turcutheca crassaecochlia Syssoiev, 1962, ZPAL MoXX/7 from the Tommotian (Dokidocyathus lenaicus Zone) at Bydyangaia on the Lena River, central Yakutia of possible distant cephalopod affinity, probably mature specimen with displaced embryonic part preserved as a glauconitic internal mold, lateral (H1) and posterior ("ventral") (H2) views (see also Dzik 2010: fig. 7b and c).
Figure 7 in Spatiotemporal patterns in marine fish and cephalopods communities across scales: using an autoregressive spatiotemporal clustering model. A study of fish and cephalopods of the Eastern English Channel
Figure 7. – Eastern English Channel spatial community from low (blue) to high (red) median densities of numbers/ km2 in log scale are mapped, S522c1 (A), S522c2 (B).
Figure S3 in Spatiotemporal patterns in marine fish and cephalopods communities across scales: using an autoregressive spatiotemporal clustering model. A study of fish and cephalopods of the Eastern English Channel
Figure S3. – Eastern English Channel spatial community from low (blue) to high (red) median densities of numbers/km2 in log scale are mapped, S782c1 (A), S782c2 (B), S1043sc1 (C), S1043sc2 (D), S1043sc3 (E).
Figure 6 in Spatiotemporal patterns in marine fish and cephalopods communities across scales: using an autoregressive spatiotemporal clustering model. A study of fish and cephalopods of the Eastern English Channel
Figure 6. – Absolute values of spatial-temporal hierarchical clustering at a 522 km2 scale. The rectangle outlines the communities that where find statistically significant by ASTEC given the approximately unbiased p-values in percentage (red). The light grey numbers represent the edge number of the tree.
Figure 1. – Eastern English Channel spatial grid using a in Spatiotemporal patterns in marine fish and cephalopods communities across scales: using an autoregressive spatiotemporal clustering model. A study of fish and cephalopods of the Eastern English Channel
Figure 1. – Eastern English Channel spatial grid using a triangular mesh at a 522 km2 (A), 782 km2 (B) and 1043 km2 (C) average scale with the geographic coordinates in WGS84 of all the English Channel groundfish hauls survey from 1995 to 2014 (blue). The red points are the vertices used to define the mesh.
Figure 10 in Spatiotemporal patterns in marine fish and cephalopods communities across scales: using an autoregressive spatiotemporal clustering model. A study of fish and cephalopods of the Eastern English Channel
Figure 10. – Alosa sp. from low (blue) to high (red) median densities of numbers/ km2 in log scale for 522 km2 for the Eastern English Channel.
Figure 4 in Spatiotemporal patterns in marine fish and cephalopods communities across scales: using an autoregressive spatiotemporal clustering model. A study of fish and cephalopods of the Eastern English Channel
Figure 4. – Spatial hierarchical clustering at a 522 km2 scale. The rectangle outlines the communities that where find statistically significant by ASTEC given the approximately unbiased p-values expressed in percentage (red). The light grey numbers represent the edge number of the tree.
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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.