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1,069 results for “bryozoans”
Figure 1 from: Klass AL, Sokolova SE, Kondakov AV, Bespalaya YV, Gofarov MY, Tomilova AA, Vikhrev IV, Bolotov IN (2018) An example of a possible leech-bryozoan association in freshwater. ZooKeys 794: 23-30. https://doi.org/10.3897/zookeys.794.28088
Figure 1 Map of Lena River basin, Eastern Siberia, with occurrence of the leech-bryozoan association in a floodplain lake (red dot).
Figure 2 from: Klass AL, Sokolova SE, Kondakov AV, Bespalaya YV, Gofarov MY, Tomilova AA, Vikhrev IV, Bolotov IN (2018) An example of a possible leech-bryozoan association in freshwater. ZooKeys 794: 23-30. https://doi.org/10.3897/zookeys.794.28088
Figure 2 Leech-bryozoan association from a floodplain lake in Lena River basin, Yakutia, Eastern Siberia, Russia. A Leeches Alboglossiphoniacf.papillosa in interstitial spaces between zooids of a Plumatellaaff.fungosa colony (ethanol-preserved sample). The red arrows indicate leech specimens. B Size frequency histogram of the leech sample (N = 25). C Dorsal and D Ventral view of adult leech. Photographs Svetlana E. Sokolova. Scale bars: 5 mm (A); 1 mm (C, D).
Text-fig. 2. Studied section at the Ďurkovec quarry. Note the co-occurrence of bryozoans and decapod crustaceans. in The Priabonian Bryozoan-Decapod Association From The Borové Formation (The Ďurkovec Quarry, Ne Slovakia) And Its Palaeoecological Implications
Text-fig. 2. Studied section at the Ďurkovec quarry. Note the co-occurrence of bryozoans and decapod crustaceans.
Fig. 5 in Correction to: Alcyonidium kuklinskii sp. nov., a new species of Antarctic ctenostome bryozoan with a key to all Antarctic species of the genus
Fig. 5 Maximum likelihood phylogenetic tree of Alcyonidium based on 646 unambiguously aligned nucleotide sites of the COI gene. Values on nodes represent posterior probabilities for BI (based on last 75% of trees) and bootstrap support (1000 replicates), respectively. Support values <50% are not shown. The scale bar represents one substitutional change per 100 nucleotide positions. * Sequence was generated during this study
Fig. 9 in A new species of the European freshwater bryozoan fauna: Plumatella similirepens WOOD, 2001 (Bryozoa, Phylactolaemata)
Fig. 9: Plumatella similirepens. Scanning electron micrograph of the suture. Scale bar = 20 µm. Fig. 10: Plumatella similirepens. Scanning electron micrograph of the sessoblast. a) Frontal valve. Scale bar = 100 µm. b) Detail of a). Scale bar = 50 µm. Fig. 11: Scanning electron micrograph of dorsal valve. a) Plumatella repens from the same hatchery. Scale bar = 100 µm. b) Detail of a). Scale bar = 50 µm. c) Typical Plumatella repens from an Italian natural site. Scale bar = 100 µm. d) Detail of c). Scale bar = 20 µm.
Figure 9. A, B in Brood chambers constructed from spines in fossil and Recent cheilostome bryozoans
Figure 9. A, B, Stichomicropora baccata (Canu & Bassler), Maastrichtian, Tennessee, USA, USNM 69954. A, ovicell with spines intact; note lateral foramina opening above facets in cryptocysts of the two neighbouring autozooids. B, ovicell with spines broken off to reveal gymnocystal floor. C-E, Stichomicropora sp. 6. C, D, Maastrichtian, North Carolina, USA, NHM BZ4859. C, part of colony with numerous ovicells. D, ovicell with spines intact. E, two damaged ovicells; Maastrichtian, Alabama, USA, NHM BZ4796. F, Stichomicropora sp. 7, broken ovicell showing the floor and lateral facets; Maastrichtian, North Carolina, USA, NHM BZ4186. Scale bars: A, B, D–F = 100 Mm; C = 1 mm.
Figure 24 in Brood chambers constructed from spines in fossil and Recent cheilostome bryozoans
Figure 24. Schematic diagrams showing the shape of the mural rim and positioning of ovicell spine bases in frontal aspect; number of spines in Stichomicropora is approximate. Note that variable species may appear more than once. A, Stichomicropora sp. 1. B, S. oceani. C, Stichomicropora sp. 6. D, Stichomicropora sp. 1, S. sicksi and S. sulcata. E, S. oceani, Stichomicropora sp. 3, and Stichomicropora sp. 5. F, Stichomicropora sp. 6 and S. baccata. G, Stichomicropora spp. 1, 2 and 4, S. sicksi, S. sulcata, S. erecta, S. biconstricta, S. cf. clathrata and S. punctilla. H, S. marginula, Stichomicropora sp. 3; I, Distelopora bipilata and D. langi. J, Stichomicropora spp. 6 and 7, S. baccata, S. subquadrata, Monoporella spp. 1 and 2, M. prisca, M. nodulifera, and M. exculpta. K, Gilbertopora larwoodi or Wilbertopora mutabilis. L, Distelopora bipilata. M, Monoporella multilamellosa and M.? vincentownensis. N,?Thoracopora sp. and Craticulacella schneemilchae. O, Leptocheilopora tenuilabrosa, Leptocheilopora sp. 1, and Leptocheilopora sp. 2. P, Distelopora spinifera and Unidistelopora krauseae. R, Macropora spp.
Figure 18. A-C, Leptocheilopora tenuilabrosa Lang. A in Brood chambers constructed from spines in fossil and Recent cheilostome bryozoans
Figure 18. A-C, Leptocheilopora tenuilabrosa Lang. A, group of zooids and an ovicell (centre); Santonian, Hampshire, England, NHM D21210. B, complete ovicell, showing costae; Santonian, Sussex, England, NHM D28892. C, broken ovicell; Santonian, Hampshire, England, NHM D21210. D-F, Leptocheilopora sp. 1, Campanian, Norfolk, England, NHM D55505. D, three broken ovicells and a heterozooid with an enlarged orifice (right centre). E, complete ovicell. F, another complete ovicell. Scale bars: A = 500 Mm; B, C, E, F = 100 Mm; D = 200 Mm.
Figure 8. A-C in Brood chambers constructed from spines in fossil and Recent cheilostome bryozoans
Figure 8. A-C, Stichomicropora sp. 3, Coniacian, Kent, England, NHM D4125. A, group of ovicellate and nonovicellate zooids; note closure plates sealing zooids in bottom left. B, ovicell represented by a gently convex line of spine bases of which the innermost are aligned along the mural rim of the distal zooid. C, another ovicell with spine bases arranged in a straighter line. D, Stichomicropora sp. 4, worn specimen with distally convex arches of two broken ovicells (centre and top centre); Coniacian, Luton, England, NHM D8185. E, F, Stichomicropora sp. 5, Cenomanian, Devon, England, NHM D55618. E, group of zooids with an ovicell (bottom right). F, ovicell spine bases arranged in a straight line along the mural rim of the distal zooid, except for the two most lateral spine bases which are more proximally placed and separated from the mural rim. Scale bars: A, E = 250 Mm; B, C = 50 Mm; D, F = 100 Mm.
Figure 19. A-D in Brood chambers constructed from spines in fossil and Recent cheilostome bryozoans
Figure 19. A-D, Leptocheilopora sp. 2. Lower Maastrichtian, Norfolk, England. A, group of zooids with complete and broken ovicells; NHM BZ5206. B, broken ovicells, that in the centre associated with an intramurally budded reparative zooid; NHM BZ5205. C, complete ovicell; NHM BZ5204. D, the same ovicell at higher magnification, showing apparent lateral fusions between costae. E, F, Leptocheilopora magna Lang, Campanian, Norfolk, England, NHM BZ5207. E, broken ovicell, showing horizontal slit. F, another broken ovicell. Scale bars: A = 500 Mm; B = 200 Mm; C, E, F = 100 Mm; D = 50 Mm.
Fig. 3 in Freshwater bryozoans in the backwaters of the Danube and Traun Rivers south-east of Linz, Upper Austria
Fig. 3: Bryozoans in the floodplain area south-east of Linz, zooids: a – Paludicella articulata, b – Fredericella sultana, c – Plumatella casmiana, d – Plumatella repens, e – Plumatella fungosa, f – Cristatella mucedo. Single zooid size: 1-2 mm.
Figure 15. A–E in Systematics of the bryozoan genus Macropora (Cheilostomata)
Figure 15. A–E, Monoporella exsculpta (Marsson, 1887), Cretaceous, Maastrichtian. A, B, SMF Voigt Collection 11247, Lower Maastrichtian, Basbeck, Hemmoor, Niedersachsen, Germany. A, broken ovicell. B, detail of broken edge of ovicell tilted to reveal costae (right medial and right lateral costal lumina arrowed). C–E, SMF Voigt Collection 7170, Upper Maastrichtian, St Petersburg, Maastricht, the Netherlands. C, autozooids, some with closure plates, a kenozooid (right of centre) and a mandibulate avicularium (lower right). D, two avicularia, the lower lacking a mandible and showing the deep rostral shelf, the upper with an intact mandible. E, fragment showing underside of frontal shield with pseudopores and a probable opesiule arrowed. F,?Macropora similis sp. nov., NHM BZ5379, Pliocene, Momoe-a-toa Tuff, Momea-toa, Chatham Island; interior of zooid showing in-situ operculum and underside of frontal shield with grooves diverging outwards from opesiules. Scale bars: A, C = 500 mm; D, F = 200 mm; B, E = 100 mm.
Figure 13. Macropora waimatukuensis Uttley, 1949 in Systematics of the bryozoan genus Macropora (Cheilostomata)
Figure 13. Macropora waimatukuensis Uttley, 1949,?Miocene, Waimatuku River, Southland, New Zealand, CM zb51, holotype. A, autozooids, two avicularia and a kenozooid. B, operculum of autozooid. C, orifice of avicularium showing deep pits in the distolateral corners of the oral shelf. D, operculum of avicularium and spine bases. E, two maternal zooids, that on the right with a broken ovicell. F, ovicell. Scale bars: A, E = 500 mm; B–D = 100 mm; F = 200 mm.
Figure 1 in Systematics of the bryozoan genus Macropora (Cheilostomata)
Figure 1. Large colony of Macropora levinseni Brown, 1952 encrusting a cobble from Goat Island Bay, Leigh, New Zealand. NHM 2007.3.28.1. Scale bar = 1 cm.
Figure 6 in Systematics of the bryozoan genus Macropora (Cheilostomata)
Figure 6. Macropora septispinosa sp. nov., Miocene, New Zealand. A–B, 'Onepunga Limestone', Onepunga, Canterbury, NHM D53510. A, group of zooids, including an avicularium (bottom centre). B, avicularium orifice. C, E, F, White Rock Limestone, White Rock Lime Quarry, Canterbury. C, autozooidal orifice, NHM BZ5372. E, ovicell, NHM BZ5373. F, broken ovicell showing floor and costal bases, NHM BZ5372. D, autozooids and avicularia, IGNS BZ 224, holotype, Forest Hill Limestone, Centre Bush Quarry, Southland. Scale bars: A = 1 mm; B, C = 200 mm, D–F = 500 mm.
Fig. 6 in Disporella guada sp. nov., an erect-ramose rectangulate cyclostome (Bryozoa, Stenolaemata) from the Caribbean Sea: convergent evolution in bryozoan colony morphology
Fig. 6. Bayesian analysis of the concatenated 18S + 28S rDNA dataset constructed using MrBayes ver. 3.6.2 under the GTR + I + G model of nucleotide evolution. The analysis was run for 10 million generations; 7 million generations were discarded as burn-in. Posterior probabilities are given at the nodes. All nodes with <0.95 posterior probabilities have been collapsed. The branch length scale bar indicates number of substitutions per site. Higher level classification is given at the right-hand side. Emboldened terminals indicate newly generated data.
Fig. 4 in Disporella guada sp. nov., an erect-ramose rectangulate cyclostome (Bryozoa, Stenolaemata) from the Caribbean Sea: convergent evolution in bryozoan colony morphology
Fig. 4. Disporella guada Harmelin, Taylor & Waeschenbach sp. nov. A. Paratype (NHMUK 2021.2.25.1). B–C, F–H. Holotype (MNHN-IB-2017-696). D–E. Paratype (NHMUK 2021.3.19.1). A. Frontal view of autozooids with short peristomes interspersed with kenozooids. B–C. Calcified diaphragms with a central lumen closing an autozooid (B) and a kenozooid (C). D–E, G. Longitudinal sections of zooids showing the moniliform walls with mural pustules, and the communication pores. F. Funnel-shaped diaphragm with a sectioned autozooid. H. Mural spines and pustules surrounding a communication pore.
FIGURE 4 in Morphological features of Late Ordovician (Sandbian) bryozoans from the basin of Khrevitsa River (north-western Russia) and description of a new species of the genus Prophyllodictya Gorjunova, 1987
FIGURE 4. Phylogenetic relationships of the genus Prophyllodictya Gorjunova, 1987
Fig. 9 in Morphogenetic gradients in graptolites and bryozoans
Fig. 9. Growth relations in compound monograptid colonies. A. Cladial generation in Cyrtograptus rigidus Tullberg, showing successive stages of budding of lateral cladium from aperture of a mother theca on the main stipe (A1–A5) and a mature rhabdosome with isochronous thecae showing the same size and shape interconneccted by broken lines (A). B. Delayed formation of a sicular cladium in Neodiversograptus nilssoni (Lapworth), where its first theca (12) is 6 isochronic with thecae 151–201 of the primary stipe (B) and therefore first theca of the sicular cladium (12) much more robust than the first theca of the pri1 mary cladium (11) (B). Not to scale. A, after Thorsteinsson (1955); B, from Palmer (1971) and Urbanek (1963).
Fig. 11 in Morphogenetic gradients in graptolites and bryozoans
Fig. 11. Astogeny of bryozoan colonies. A. Diagram based on Escharoides Milne Edwards and showing morphological variation in relatively simple bryozoan colony. All zooids have originated from the primary oozooid (A, ancestrula) and display a gradient in size and shape of zooecia until first repetitive zooids appear (3). This proximal series of zooids compose together the primary zone of astogenetic change. Further development leads to a series of zooids showing the same size and shape and making the primary zone of astogenetic repetition. A series of zooids near the growing edge (5–8) display a growth gradient, all of them will reach eventually morphology displayed by 4. B. Astogeny in a cheilostomate bryozoan Poricellaria d'Orbigny showing besides primary zone of astogenetic change and repetition, also cyclically repeating subsequent zones of change (S1C, S2C) as well as of repetition (S1R, S2R). While primary zone of astogenetic change begins with the ancestrula (A) subsequent zones of astogenetic change start with diminutive zooids which are not wholly comparable with ancestrula. In the given zone of astogenetic repetition zooids are alike and their morphology repeats this of the last generation of the preceding zone of astogenetic change. Successive zones of change occur over fewer generations, their zooecia become longer, more asymmetrical, may also change the budding pattern. Modified from Boardman et al. (1969).
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