Find research datasets worth reusing
Search datasets from major research repositories and use ShareScore to quickly assess how well each record supports discovery, access, and reuse.
38
datasets available to search
ShareScore release 0.9.0
Dataset results
38 results for “Plumatella”
Fig. 18 in Reproductive biology, embryonic development and matrotrophy in the phylactolaemate bryozoan Plumatella casmiana
Fig. 18 Ultrastructure of the anterior hemisphere of a bilayered embryo and embryo sac shortly before bud formation in Plumatella casmiana (TEM). a Overview of embryonic epithelia and embryo sac. The embryo shows high prismatic ectoderm and flattened mesodermal cells. Ectodermal cells possess filiform extensions on their lateral sides. b Detail of an embryonic ectodermal cell showing filiform processes, mitochondria, numerous free ribosomes and a multivesicular body in the apical part of the cell. c Detail of a mesodermal cell of the embryo sac. In contrast to the embryonic cells, it shows a lower density of ribosomes, but much more vacuoles and endoplasmatic reticulum. Presumed site of exocytosis towards the lumen of the embryo sac is marked by an arrow. d Detail of the mesoderm of the embryo including large vacuoles with unknown content (asterisks). Arrow shows an extension of the cell membrane towards the basal lamina. Abbreviations: bl basal lamina, eme embryonic ectoderm, emm embryonic mesoderm, er endoplasmatic reticulum, esm mesoderm of the embryo sac, mi mitochondria, mvb multivesicular body, nu nucleus, nuc nucleolus, ri ribosomes
Fig. 15 in Reproductive biology, embryonic development and matrotrophy in the phylactolaemate bryozoan Plumatella casmiana
Fig. 15 Longitudinal sections of brooded larvae of Plumatella casmiana. a. The embryo sac is conspicuous. The larval mantle is ciliated (arrowhead) and in earlier stages restricted to the anterior pole of the larva. Halfway along the longitudinal axis the mantle forms a deep groove (arrows). Two almost differentiated buds are present in the larva. b
Fig. 16 in Reproductive biology, embryonic development and matrotrophy in the phylactolaemate bryozoan Plumatella casmiana
Fig. 16 Semithin sections of late embryonic stages of Plumatella casmiana. a, b Longitudinal sections of an early larva. The mantle is not yet ciliated and a mantle fold is present in the equatorial region. Posterior of the mantle fold, the ring-shaped contact zone ('placenta') of elongated cells of the larval ectoderm is in contact with the mesoderm of the embryo sac (partly seen in a). The embryo sac is rather thin but still includes voluminous cells (arrowheads), some with cytoplasmatic inclusions (arrows). c, d Oblique cross section of an advanced larva showing contact areas of the larva to the cells of the embryo sac. The ringshaped 'placenta' is disrupted where the mantle fold overgrows the larva in posterior direction. e–i Contact cells (asterisks) in early larvae. These cells are either formed by cytoplasmatic extensions of embryonic/larval cells (e, f), or their origin is unclear (g, h). In some cases they appear to belong to the embryo sac (i). Abbreviations: b bud, e embryo/ larva, ecd ectoderm of the larva, ebs embryo sac, ma larval mantle, msd mesoderm of the larva, mf mantle fold, pac placenta cells
Fig. 13 in Reproductive biology, embryonic development and matrotrophy in the phylactolaemate bryozoan Plumatella casmiana
Fig. 13 Bud formation in an advanced embryo of Plumatella casmiana. Semithin sections. The border between the ectodermal and mesodermal layer of the embryo sac wall are shown by a dashed line in a and d. a, b Different section levels of same embryo showing proliferating cells (arrows in b) of the anlage of the bud, close to the posterior pole of the larva. Buds are two-layered and protrude into the lumen of the embryo. c, d. Two-layered polypide anlage (asterisk) consisting of an inner (epidermal/ectodermal) and outer (peritoneal/mesodermal) budding layer. Abbreviations: ebs embryo sac, eme embryonic ectoderm, emm embryonic mesoderm
Fig. 12 in Reproductive biology, embryonic development and matrotrophy in the phylactolaemate bryozoan Plumatella casmiana
Fig. 12 Semithin sections of a bilayered embryo of Plumatella casmiana. The border between the ectodermal and mesodermal layer of the embryo sac wall are highlighted by a dashed line in a, b. a Distal part of the embryo sac and the posterior pole of the embryo. The ectodermal lining of the embryo sac is thin except at its attachment area to the body wall (upper part of image). b Dark cytoplasmic inclusion (arrow) in the mesodermal embryo sac layer. Multiple lipids are visible as light brown inclusions. The embryonic mesoderm consists of flattened cells, and the ectodermal cubic or prismatic cells occasionally show vacuoles (asterisks). In some areas it has tight contact to the dissolving embryo sac ectoderm (arrowhead). c Embryo sac showing voluminous cells of the embryo sac mesoderm (asterisks) and an almost completely reduced ectodermal layer. The ovary is in tight association with the embryo sac with apparent contacts (arrows). d Ectodermal cell of the embryo showing extension towards the mesoderm of the embryo sac (arrow). Abbreviations: b polypide bud, eme embryonic ectoderm, emm embryonic mesoderm, ese ectoderm of embryo sac, esm mesoderm of embryo sac, mec maternal ectoderm cells, ov ovary
Fig. 11 in Reproductive biology, embryonic development and matrotrophy in the phylactolaemate bryozoan Plumatella casmiana
Fig. 11 Bilayered embryo of Plumatella casmiana at the beginning of bud formation. Semithin sections. The border between the ectodermal and mesodermal layer of the embryo sac are shown by the dashed line in b & c. a Double-layered embryo with fully formed mesoderm. Towards the proximal, suspended end of the sac, the mesodermal cells of the embryo are thinner. At one point the embryo sac shows a perforation through which the embryo protrudes (arrow). b Same embryo as in a but a more median section of the embryo and the embryo sac showing mesoderm thickness. Note also the much smaller plug of maternal ectodermal cells towards the body wall. c Detail of the distal end of the embryo sac showing less staining of ectodermal embryo sac cells compared to the remaining cells. d–f Details of contact areas between embryo and embryo sac. Individual cells of the embryonic ectoderm show cytoplasmic extensions (arrows) towards the embryo sac. The mesoderm of the embryo sac projects toward the embryonic ectoderm (d, left arrow). Abbreviations: b polypide bud, clc coelomocyte, eme embryonic ectoderm, emm embryonic mesoderm, ebs embryo sac, mec maternal ectoderm cells, ov ovary
Fig. 8 in Reproductive biology, embryonic development and matrotrophy in the phylactolaemate bryozoan Plumatella casmiana
Fig. 8 Schematic drawings of the embryonic development of Plumatella casmiana. a Blastula stage situated at the suspended end of the embryo sac which consists of an external mesodermal layer and an ectodermal part inside that entirely surrounds the embryo at this stage. b Early mesoderm formation from ectodermal cells (red) of the prospective aboral pole of the embryo. Maternal ectoderm in the proximal, suspended end has started to diminish in this stage. c Progressed mesoderm formation showing its progression from the upper attached site towards the suspended, lower area of the embryo sac. The mesoderm of the embryo sac is connected to the embryonic ectoderm via contact cells where the ectodermal lining is reduced. d Late embryo with commencing bud formation at the aboral pole. The maternal ectoderm is in contact with some embryonic ectodermal cells (arrows). The mesoderm of the embryo sac is connected to the embryonic ectoderm via contact cells. e Late embryo with mantle fold formation. A distinct ring-shaped contact zone has formed at this stage. Abbreviations: b polypide bud, bwm body wall musculature of the maternal cystid, coc coelomic cavity, e embryo, eme embryonic ectoderm, emm embryonic mesoderm, ebs embryo sac, ese ectoderm of embryo sac, esm mesoderm of embryo sac, ed epidermis (ectodermal origin), mec maternal ectoderm cells, mf mantle fold of larval mantle, pac placenta cells, pt peritoneum (mesodermal origin). Colors: peritoneum and mesodermal layer of embryo sac, yellow; epidermis and ectodermal layer layer of embryo sac, green; ectoderm of embryo, red; mesoderm of embryo, blue; contact cells, violet
Fig. 9 3D in Reproductive biology, embryonic development and matrotrophy in the phylactolaemate bryozoan Plumatella casmiana
Fig. 9 3D reconstruction of early embryos of Plumatella casmiana based on serial semithin sections. a Embryo consisting of several blastomeres at the suspended end of the bilayered embryo sac. The inner, ectodermal lining of the embryo sac begins to disappear at the suspended end (asterisk). Embryonic contact cells are in connection to the embryo sac. b Blastula with central cavity. The maternal ectoderm cells are now restricted to the contact area towards the body wall. c Early mesoderm formation. d Advanced stage with mesoderm formation completed. Abbreviations: cnc contact cells, e embryo, eme embryonic ectoderm, emm embryonic mesoderm, esm mesoderm of the embryo sac, mec maternal ectoderm cells. Colors: Mesodermal part of embryo sac, yellow; ectodermal part of embryo sac, green; embryonic ectoderm, red; embryonic mesoderm, blue; contact cells, violet
Fig. 7 in Reproductive biology, embryonic development and matrotrophy in the phylactolaemate bryozoan Plumatella casmiana
Fig. 7 Contact areas of embryos of Plumatella casmiana and the maternal ectoderm. Semithin sections. The border between the ectodermal and mesodermal layer of the embryo sac are shown by the dashed line in a–c. a Blastula stage in a bilayered embryo sac. The latter consists of a thick (outer) mesoderm and a thin inner lining of maternal ectoderm. One blastomere of the embryo is in contact (arrow) with the adjacent ectodermal cell of the embryo sac. The cytoplasm of the connected maternal ectoderm cell stains less intense than adjoining cells. b Detail of the embryo sac with a maternal ectodermal cell (arrow) in contact with the blastomere. c Detail of a blastula showing contact of a blastomere with the maternal ectoderm in the proximal area of the embryo sac. d Late embryo showing several ectodermal cells at the posterior pole of the embryo forming contact with the remaining maternal ectodermal cells (arrow). Abbreviations: e embryo, ebs embryo sac, eme embryonic ectoderm, emm embryonic mesoderm, mec maternal ectoderm cells, ov ovary
Fig. 6 in Reproductive biology, embryonic development and matrotrophy in the phylactolaemate bryozoan Plumatella casmiana
Fig. 6 Late embryo of Plumatella casmiana, longitudinal section. a Overview of the large thin-walled embryo sac next to the ovary with mature oocytes. The embryo oc- cupies almost the entire cavity of the brood sac and has started to form buds in its distal region. b Ectodermal cells (asterisks) of the posterior pole of the embryo are in direct contact to the maternal ectodermal cells of the embryo sac. c Early bud formation. Ectodermal cells proliferate (arrows) and ingress, while the adjoining mesoderm thickens and surrounds the ectodermal ingression. d Establishment of contact between the embryonic ectoderm (asterisk) and the mesodermal layer of the embryo sac. The bor- der between the ectodermal and mesodermal layer of the embryo sac is shown by a dashed line in b and c. Abbreviations: ebs embryo sac, eme embryonic ectoderm, emm embryonic mesoderm, mec maternal ectoderm cells
Fig. 3 in Reproductive biology, embryonic development and matrotrophy in the phylactolaemate bryozoan Plumatella casmiana
Fig. 3 Ovary and embryo sac formation in Plumatella sp. a Early ovary in the body wall. Embryo sac formation occurs next to the ovary with its initial stage detectable by proliferation of the epidermal layer. b More progressed stage than in 'a' with the ovary and embryo sac protruding more into the body cavity of the zooid. c The oocyte number increases, and the largest and most mature oocytes are situated at the free end of the ovary towards the coelomic cavity. d Embryo sac with enclosed early embryo in the proximal part. The distal part towards the body wall is plugged by maternal cells from the epidermis. Abbreviations: b bud, e embryo, ebs embryo sac, ese embryo sac ectoderm, esm embryo sac mesoderm, mec maternal ectodermal cells, ooc oocyte, ov ovary
Fig. 2 a, b in Reproductive biology, embryonic development and matrotrophy in the phylactolaemate bryozoan Plumatella casmiana
Fig. 2 a, b Whole mounts of autozooids of Plumatella sp. a General view of a zooid with retracted polypide. b Close-up of the cystid wall showing a young polypide bud, an ovary with few oocytes and a developing embryo sac. Abbreviations: b bud, ebs embryo sac, l lophophore, o orifice, ooc oocytes, ov ovary, t tentacles, ts tentacle sheath
Fig. 7. Plumatella reticulata Wood 1988. A in Freshwater bryozoans of Korea-observations on living colonies and three new records
Fig. 7. Plumatella reticulata Wood 1988. A, Sessoblasts; B, Reticulated irregular ridges on the frontal fenestra of A; C, Annulus; D, Lateral wall, sessoblast. Scale bars: A = 100 μm, B, C = 50 μm, D = 30 μm.
Fig. 5. Plumatella casmiana Oka, 1907. A in Freshwater bryozoans of Korea-observations on living colonies and three new records
Fig. 5. Plumatella casmiana Oka, 1907. A, Colony (white arrow); B, Leptoblast; C, Dorsal view, Sessoblast; D, Lateral view, sessoblast. Scale bars: A= 2 mm, B-D = 100 μm.
Fig. 12 in A new species of the European freshwater bryozoan fauna: Plumatella similirepens WOOD, 2001 (Bryozoa, Phylactolaemata)
Fig. 12: Scanning electron micrograph of the suture. a) Plumatella repens from the same hatchery. b) Typical Plumatella repens from an Italian natural site. Scale bars = 20 µm.
Fig. 5 in A new species of the European freshwater bryozoan fauna: Plumatella similirepens WOOD, 2001 (Bryozoa, Phylactolaemata)
Fig. 5: Plumatella similirepens. Scanning electron micrograph of dorsal valve. a) Paved annulus with three series of regularly distributed tubercles. Scale bar = 100 µm. b) Detail of a) showing nodules on both annulus and fenestra and polar region. Scale bar = 50 µm.
Fig. 1 in A new species of the European freshwater bryozoan fauna: Plumatella similirepens WOOD, 2001 (Bryozoa, Phylactolaemata)
Fig. 1: Plumatella similirepens. Longitudinal striations (arrow) of a fragment of the encrusted ectocyst. Scale bar = 100 µm
FIGURE 11. Plumatella wiebachi n in Review of freshwater Bryozoa (Phylactolaemata) of Central Africa with descriptions of two new species
FIGURE 11. Plumatella wiebachi n. sp., Specimen No. 56. (a) Colony surrounded by sessoblasts, scale bar = 3 mm; (b) colony showing greater detail, scale bar = 1 mm; (c) floatoblast valves with dorsal valve on the left, scale bar = 100 μm; (d–g) com-parison of statoblasts in Plumatella javanica and Plumatella wiebachi n. sp. (d) P. javanica floatoblast fenestra showing optical points of light around each tubercle; (e) P. javanica sessoblast from the author's personal collection from Thailand showing relatively large tubercles; (f) P. wiebachi n. sp. floatoblast fenestra showing the absence of such points of light; (g) P. wiebachi n. sp. sessoblast showing relatively small tubercles. Scale bars for figs. 11d–g = 100 μm.
FIGURE 3. Plumatella javanica Kraepelin, 1906. A, B in Freshwater Bryozoa of Okinawa, Japan, with descriptions of Rumarcanella gen. nov. (Phylactolaemata: Plumatellidae) and two new species
FIGURE 3. Plumatella javanica Kraepelin, 1906. A, B, colony on a stone at two magnifications. C, SEM micrograph of floatoblast, ventral view. D, enlarged view of the fenestra surface in C, showing the small, irregular pores.
FIGURE 7. Plumatella jariensis n in New species, genera, families, and range extensions of freshwater bryozoans in Brazil: the tip of the iceberg?
FIGURE 7. Plumatella jariensis n. sp. a) floatolast valves: dorsal (left) and ventral (right), scale bar = 100 µm.; b) Detail of floatoblast periphery showing small projections, scale bar = 25 µm; c) Lateral view of floatoblast showing the taper to an acute angle, scale bar = 20 µm. d) Portion of a colony showing well sclerotized curitula, scale bar = 2 cm; e) Detail showing abrupt transition from sclerotized to soft parts, scale bar = 0.5 mm.
ScienceDex guides
Understand access before you commit
These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
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)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
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.