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228 results for “marine sponge”
Fig. 2 in New Records and Range Extensions of Some Marine Sponges (Porifera: Demospongiae and Homoscleromorpha) from the Andaman Islands, India; Part of the Indo-Burma Biodiversity Hotspot.
Fig. 2. Spheciospongia globularis (Dendy, 1922). (A) Specimen in situ. (B) Specimen after preservation. (C1) Large sized Tylostyles. (C2) Medium sized Tylostyles. (C3) Small sized Tylostyles. (C4) Spiraster. (D) Longitudinal section. (E) Longitudinal section. (F) Transverse section.
Fig. 14. Plakortis communis Muricy, 2011 in New Records and Range Extensions of Some Marine Sponges (Porifera: Demospongiae and Homoscleromorpha) from the Andaman Islands, India; Part of the Indo-Burma Biodiversity Hotspot.
Fig. 14. Plakortis communis Muricy, 2011. (A) Specimen after preservation. (B1) Diods. (B2) Y-shaped triods. (C) Longitudinal section. (D) Longitudinal section. (E) Transverse section. (F) Transverse section.
Fig. 12 in New Records and Range Extensions of Some Marine Sponges (Porifera: Demospongiae and Homoscleromorpha) from the Andaman Islands, India; Part of the Indo-Burma Biodiversity Hotspot.
Fig. 12. Axinyssa mertoni (Hentschel, 1912). (A) Specimen after preservation. (B) Close view of fistular structure. (C) Oxea. (D) Longitudinal section. (E) Longitudinal section. (F) Transverse section. (G) Transverse section.
Fig. 4 in New Records and Range Extensions of Some Marine Sponges (Porifera: Demospongiae and Homoscleromorpha) from the Andaman Islands, India; Part of the Indo-Burma Biodiversity Hotspot.
Fig. 4. Cliothosa aurivilli (Lindgren, 1897). (A) in situ specimen. (B) Papillar connection with the inside body mass of sponge. (C) Space inside the dead coral bored by the sponges. (D1) Thick Tyalostyles. (D2) Thin Tyalostyles. (D3) Amphiaster. (E) Longitudinal section. (F) Transverse section.
Text-fig. 3. Stratigraphic section through part of the Ashawq Formation at the Omanitherium type locality, Dhofar Governorate, Oman. Beds A–D are indurated cliff-forming strata identified in the accompanying field photographs (Textfigs 4, 5). Note the increase in marine influence as one ascends through the section, the fauna in Beds A and B being dominated by freshwater molluscs and land snails, with few brackish water specimens, whereas the biota in Bed D is frankly marine with a single specimen of the freshwater snail Pila. Bed C yielded Vermetus, oysters and sponges, but also contains abundant land snails and a low diversity of freshwater gastropods. in Large Mammals From The Rupelian Of Oman - Recent Finds
Text-fig. 3. Stratigraphic section through part of the Ashawq Formation at the Omanitherium type locality, Dhofar Governorate, Oman. Beds A–D are indurated cliff-forming strata identified in the accompanying field photographs (Textfigs 4, 5). Note the increase in marine influence as one ascends through the section, the fauna in Beds A and B being dominated by freshwater molluscs and land snails, with few brackish water specimens, whereas the biota in Bed D is frankly marine with a single specimen of the freshwater snail Pila. Bed C yielded Vermetus, oysters and sponges, but also contains abundant land snails and a low diversity of freshwater gastropods.
Sponge diversification in marine lakes: implications for phylogeography and population genomic studies on sponges
<p class="MsoNormal"><span>The relative influence of geography, currents and environment on gene flow within sessile marine species remains an open question. Detecting subtle genetic differentiation at small scales is challenging in benthic populations due to large effective population sizes, general lack of resolution in genetic markers, and because barriers to dispersal often remain elusive. Marine lakes can circumvent confounding factors by providing discrete and replicated ecosystems. Using high-resolution double digest restriction-site associated DNA sequencing (4,826 Single Nucleotide Polymorphisms, SNPs), we genotyped populations of the sponge <em>Suberites diversicolor </em><span>(n=125) to test the relative importance of spatial scales (1-1,400km), local environmental regimes, and permeability of seascape barriers in shaping population genomic structure. </span>With the SNP dataset we show strong intra-lineage population structure, even at scales <10km (average F<sub>ST</sub> = 0.63), that was not detected previously using single markers. Most variation was explained by differentiation between populations (AMOVA: 48.8%) with signatures of population size declines and bottlenecks per lake. Though the populations were strongly structured, we did not detect significant effects of geographic distance, local environments, or degree of connection to the sea on population structure, suggesting mechanisms such as founder events with subsequent priority effects may be at play. We show that the inclusion of morphologically cryptic lineages that can be detected with the COI marker can reduce the obtained SNP set by almost 90%. Future work on sponge genomics should confirm that only one lineage is included. Our results call for a reassessment of poorly dispersing benthic organisms that were previously assumed to be highly connected based on low-resolution markers.</span></p>
Sponge diversification in marine lakes: implications for phylogeography and population genomic studies on sponges
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Phototransduction in a marine sponge provides insights into the origin of animal vision: CEL-Seq2 analyses
<p>Most cellular organisms respond to light. In animals, the phototransduction system has evolved from localised light-detecting photoreceptors to ultimately complex eyes and vision. Here, we investigate the origin of metazoan photodetection and transduction by comparing well-characterised opsin-based photosystems in neural animals with those in the sponge <em>Amphimedon queenslandica</em>. Although sponges lack neurons and opsin genes, they can respond rapidly to light. In <em>Amphimedon </em>larva, this is guided by the light-sensing posterior pigment ring. We first use cell type-specific transcriptomes to reveal that genes that characterise eumetazoan Gt- and Go-mediated photosystems are enriched in the <em>Amphimedon </em>pigment ring. We then apply a suite of cell signalling pathway agonists and antagonists to swimming larvae exposed to directional light. These experiments implicate metabotropic glutamate receptors, phospholipase-C, protein kinase C and voltage-gated calcium channel in larval phototaxis. We find that U-73122-inhibition of phospholipase-C, a key transducer of the Gq-mediated pathway, completely reverses phototactic behaviour. Together, these results are consistent with aneural sponges sharing with neural metazoans an ancestral set of signal transduction pathways that have been maintained in these disparate photosensory systems since the last common animal ancestor.</p>
Fig. 7 in New Records and Range Extensions of Some Marine Sponges (Porifera: Demospongiae and Homoscleromorpha) from the Andaman Islands, India; Part of the Indo-Burma Biodiversity Hotspot.
Fig. 7. Geographical extension of Biemna fortis (Topsent, 1897).
Fig. 15 in New Records and Range Extensions of Some Marine Sponges (Porifera: Demospongiae and Homoscleromorpha) from the Andaman Islands, India; Part of the Indo-Burma Biodiversity Hotspot.
Fig. 15. Geographical extension of Plakortis communis Muricy, 2011.
Fig. 1 in New Records and Range Extensions of Some Marine Sponges (Porifera: Demospongiae and Homoscleromorpha) from the Andaman Islands, India; Part of the Indo-Burma Biodiversity Hotspot.
Fig. 1. Study Area.
Fig. 11 in New Records and Range Extensions of Some Marine Sponges (Porifera: Demospongiae and Homoscleromorpha) from the Andaman Islands, India; Part of the Indo-Burma Biodiversity Hotspot.
Fig. 11. Geographical extension of Oceanapia fistulosa (Bowerbank, 1873).
Fig. 5 in New Records and Range Extensions of Some Marine Sponges (Porifera: Demospongiae and Homoscleromorpha) from the Andaman Islands, India; Part of the Indo-Burma Biodiversity Hotspot.
Fig. 5. Geographical extension of Cliothosa aurivilli (Lindgren, 1897)
Data and code for: Trapped DNA fragments in marine sponge specimens unveil north Atlantic deep-sea fish diversity
<p>Sponges pump water to filter feed and for diffusive oxygen uptake. In doing so, trace DNA fragments from a multitude of organisms living around them are trapped in their tissues. Here we show that the environmental DNA retrieved from archived marine sponge specimens can reconstruct the fish communities at the place of sampling and discriminate North Atlantic assemblages according to biogeographic region (from Western Greenland to Svalbard), depth habitat (80–1600 m), and even the level of protection in place. Given the cost associated with ocean biodiversity surveys, we argue that targeted and opportunistic sponge samples – as well as the specimens already stored in museums and other research collections – represent an invaluable trove of biodiversity information that can significantly extend the reach of ocean monitoring.</p>
Phototransduction in a marine sponge provides insights into the origin of animal vision: CEL-Seq2 analyses
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Data and code for: Trapped DNA fragments in marine sponge specimens unveil north Atlantic deep-sea fish diversity
Open the record for dataset details and reuse information.
FIGURE 4 in A checklist of marine sponges (Porifera) of peninsula India
FIGURE 4. Selected collection sites as examples of habitats and sponge diversity A: Sponge (Auletta lyrata) and hard corals on rocky beds in Grande Island, Goa, B: Cup-shaped Axinella sp. from Netrani Island, Karnataka, C: Encrusting Spheciospongia vagabunda in the midst of turf algae on the coral beds of Gulf of Mannar, and D: Fan-shaped, Callyspongia (Callyspongia) sp. from Muttom, Tamil Nadu [Photos A.M.George]
FIGURE 1 in A checklist of marine sponges (Porifera) of peninsula India
FIGURE 1. Survey stations (yellow dots) on the west and east coastline of south India. *Station Codes: A-Minicoy; B-Kadmat; C-Agatti; D-Kavaratti; E-Grande Island (Goa State); F-Netrani Island (Karnataka State); G-Vizhinjam (Kerala State); H-Enayam; I-Kolachel; J-Kadiapattnam; K-Muttom inshore; L-Muttom offshore, Kelakkal; M-Muttom offshore, Melakkal; N-Kanyakumari; O-Leepuram; P-Chinnamuttom; Q-Hare Island; R-Manauli Island; S-Kurusadi Island; (Q-S Gulf of Mannar Islands, Eastern India).
FIGURE 3 in A checklist of marine sponges (Porifera) of peninsula India
FIGURE 3. Distributional differences of number of sponge specimens in each of the 19 surveyed stations (from top southwest to southeast).
FIGURE 5 in Cyclacanthia n. g. (Demospongiae: Poecilosclerida: Latrunculiidae incertea sedis), a new genus of marine sponges from South African waters, and description of two new species
FIGURE 5. Skeletal architecture showing massive choanosomal tracts and tangential ectosome, and irregular palisade of microscleres: A–B. C. cloverlyae sp. nov. [SAMH 5080]; C–D. C. mzimayiensis sp. nov. [SAMH 5082]; E–F. C. mzimayiensis sp. nov. [SAM H5081];
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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
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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.