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Showing 1 to 20 of 23 for “"bryozoan"”.
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Cretaceous bryozoan fossils from Needs Camp, South Africa
… conservation. Published literature regarding bryozoan fossils from South Africa comprise of four papers with the most recent being a little over two decades old. The upper and lower Needs Camp quarries in the Igoda Formation, situated about 20 km northwest of East London, is of great …
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Interactions Between The Nudibranch Okenia Zoobotryon And Its Bryozoan
… and its egg masses are found attached to the bryozoan Zoobotryon verticillatum throughout the year. Okenia zoobotryon is thought to live, feed, and reproduce exclusively on Z. verticillatum, which would make this a very specialized predator-prey interaction. The primary goal of my study was to …
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Cladistic Analysis of the Paleozoic Bryozoan Families Monticuliporidae and Mesotrypidae
Two closely related families of Ordovician bryozoans, the Monticuliporidae and the Mesotrypidae, collectively contain 12 genera that have been reclassified repeatedly by various authors. Using published illustrations for the type specimens of each genus, character states for 267 morphological …
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ΣΥΜΒΟΛΗ ΣΤΗ ΜΕΛΕΤΗ ΤΩΝ ΒΡΥΟΖΩΩΝ ΤΟΥ ΑΙΓΑΙΟΥ
… ECOLOGY, ZOOGEOGRAPHY AND PALAEOECOLOGY OF THE BRYOZOAN FAUNA IN THE AEGEAN SEA IS THE MAIN PURPOSE OF THIS DISSERTATION . ON THE WHOLE 192 SPECIES WERE IDENTIFIED: (18 CTENTOSTOMATA - 131 CHEILOSTOMATA - 43 CYCLOSTOMATA). OF THESE 51 SPECIES ARE REFERRED FOR THE FIRST TIME FROM THE GREEK SEAS. …
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Habitat ecology of the native subtidal snail, Lacuna vincta, in the Gulf of Maine and the impact of two introduced species
… the Gulf of Maine. The impact of the introduced bryozoan, Membranipora membranacea (L.), and the green alga, Codium fragile (Sur.) Hariot subsp. tomentosoides (van Goor) Silva, on Lacuna vincta was investigated. Results from field samplings, reciprocal transplantations, and laboratory experiments …
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High-Resolution Sequence Stratigraphy of Paleogene, Nontropical Mixed Carbonate/Siliciclastic Shelf Sediments, North Carolina Coastal Plain, U. S. A.
… and wave-swept shoreface and shallow shelf); bryozoan and echinoderm grainstones/packstones (storm reworked middle shelf); and fine skeletal wackestones and planktonic marls (slightly storm-winnowed to sub-wave base, deeper shelf). Paleogene deposition on this high-energy, open-shelf was …
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Controls on mineralisation in the Cadeby formation (lower magnesian linestone)
… history. High energy carbonate facies and bryozoan patch reefs are devoid of mineralization, whereas lower energy facies may host stratiform sulphides and baryte. Mineralization is also related to former displacive evaporites, either by direct replacement or by precipitation in voids …
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Sequence Stratigraphy of Middle-Mississippian Carbonates of the Southern Appalachians: Tuscumbia Limestone, Tuscumbia, AL
… one subfacies were identified: F1: echinoderm, bryozoan mudstone/wackestone facies and Fla: muddy echinoderm chert, F2: echinoderm, bryozoan packstone/grainstone facies, F3: echinoderm, spicule cherty mud facies, and F4: fine-grained quartz sandstone facies. Fland Fla are interpreted to be …
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Distribution and predictors of non-indigenous marine species within South Africa's MPA network
… an overall highest biomass in the mid-shore. The bryozoan, Bugula dentata, was also widespread - present in MPAs across all three ecoregions. The invasive acorn barnacle, Balanus glandula, and bisexual mussel, Semimytilus algosus, both exhibited high levels of invasion in MPAs on the west coast. …
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Depositional environments and diagenesis of the Ratcliffe interval, Madison group (Mississippian), Williston Basin, North Dakota
… is comprised of six major facies: 1) brachiopod-bryozoan-echinoderm wackestone/packstone, 2) peloid packstone/wackestone, 3) oolite-peloid packstone, 4) laminated mudstone, 5) quartz siltstone packstone, and 6) anhydrite-dolomite mudstone. These facies were deposited in a regressive setting.</p> …
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Long-term change in the invertebrates of Zandvlei Estuary, with focus on the invasive reef worm Ficopomatus enigmaticus
… One of these is the hitherto unrecorded alien bryozoan, Conopeum seurati. Further research is required to understand the effects of long-term salinity change on the growth of F. enigmaticus and the role of F. enigmaticus as an ecosystem engineer.
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Iron minerals in sedimentary phosphorites of the southeastern United States
… shark teeth of Florida and North Carolina and in bryozoan zooecium of Tennessee. The oxidizing conditions accompanying weathering in the terrigenous sand and clay environments of central Florida alter these inclusions to goethite (FeOOH), which occurs as pseudomorphs after the iron sulfides. …
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Molecular phylogenetics of the Metazoan clade Lophotrochozoa
… 4 investigates the Hox gene complement of the bryozoan Bugula turrita. Six Hox genes were recovered, including an ortholog of the posterior class gene Post2, which is a synapomorphy for the Lophotrochozoa. The identification of a Post2 ortholog provides evidence of a close relationship between …
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Climate change and invasive species interact to impact succession and diversity in Gulf of Maine marine fouling communities
… listerianum and Didemnum sp.) and one encrusting bryozoan ( Membranipora membranacea) have become members of the fouling community. Results from these studies revealed a 33% change in species composition since 1982, succession between 1979 and 1982 was directional, leading towards a stable climax …
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Paleozoology of cores from the Tyler Formation (Pennsylvanian) in North Dakota, U.S.A.
… are present. Invertebrate species include 1 bryozoan, 15 brachiopods, 14 bivalves, 2 gastropods, 2 cephalopods, 2 annelids, 2 branchiopoda, at least 2 ostracodes, 2 malacostracans, 1 insect, and 1 echinoderm. Chordates include 1 "nonmarine" shark, at least 1 paleoniscoid fish, and 1 possible …
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The oligo-miocene sediments of the Maltese Islands
… four species involved, primarily with the aid of bryozoan growth-form studies. A new fossil fish horizon in western Malta is also discussed.A number of tectonic structures previously referred to as "sinks" are re-defined, and a prolonged episode of Cainozoic cavern development, associated with …
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Sequence stratigraphy and the development of a clinoformal carbonate ramp on an abandoned delta system: Mississippian Fort Payne--Salem Interval, Kentucky
… carbonates; high-energy ramp margin, crinoidal-bryozoan grainstones; deeper ramp mounds, skeletal grainstone/packstone sheets and channel-fills interlayered with shale or calcisiltite; and slope deposits of siliceous calcisiltite. Regional slopes on the paleoshelf edge and ramp margin are 0.5 to …
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Updip Sequence Development on a Mixed Carbonate-Siliciclastic Continental Shelf, Paleogene, North Carolina, Eastern U.S.A.
… shoreface sandy-mollusk rudstones, offshore bryozoan grainstone-packstones and subwave base fine wackestone-packstone and marl. The Eocene sequences commonly are bounded by hardgrounds, overlain by thin local lowstand sands and consist of a thin transgressive unit (commonly absent), overlain …
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Sedimentology, Diagenesis and Reservoir Characteristics of Eocene Carbonates Sirt Basin, Libya
… molluscan wackestone/packstone, nummulitic-bryozoan packstone, bryozoan wackestone; (2) mid-ramp, dominated by nummulitic packstone and Discocyclina-nummulitic wackestone; and (3) outer-ramp, dominated by fragmented nummulitic packstone. Troughs were dominated by thick successions of lime …
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