How To Use Ostracod In A Sentence
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This type of ornamentation is often found in crustaceans including Daphnia, many species of ostracodes, and other Cambrian bivalved arthropods such as Isoxys.
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Ostracod faunal characteristics and ecological distribution are diverse from each other in different qualitative substrates of the tidal zone.
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Additionally, I am addressing the highly neglected taxonomy of many of the marine meiofaunal groups (nematodes, copepods, ostracods, amphipods, acarines, etc).
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Bradoriids are small bivalved arthropods, historically considered to be the oldest members of the Ostracoda.
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Recent evidence suggests that the compound eyes of myodocopid ostracods may be phylogentically non-homologous to those of other arthropods.
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The oldest fossil related to all modern vertebrates, the ostracoderm a jawless, bony-plated fish, dates to about 490 million years ago.
Trout and Salmon of North America
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[[ostracoderm]] s jawless fish related to present-day [[lamprey]]
Conservapedia - Recent changes [en]
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Ostracods shed the carapace with each molt, whereas the conchostracans simply add material to the carapace as they grow.
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Adult land-locked fish eat mostly zooplankton, especially larger varieties such as copepods, cladocerans, mysids, and ostracods.
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By the Middle Devonian the armoured jawless ostracoderms were in decline, and instead the jawed fish were undergoing a great evolutionary radiation in both the sea and in freshwater.
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But this is by no means all, -- not only is there this external resemblance between the thoracic armour of the crustacean and the bivalve shell, but the two sides of the ostracod and phyllopod thorax are connected together also by an adductor muscle!
On the Genesis of Species
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With their armored head shield and trunk shield composed of overlapping bony plates, the placoderms appear at first glance extremely similar to the ostracoderms (armoured jawless fish).
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Steve's microfossil search achieved success: he found a fossil ostracod!
MDRS-88 sol 6: Life on Mars
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A Lower Pennsylvanian silicified ostracode fauna occurs just above the conformable Mississippian-Pennsylvanian boundary within the Barnett Formation in Texas.
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These were jawless, armored fish informally called ostracoderms, but more correctly placed in the taxon Pteraspidomorphi.
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Young feed on planktonic cladocerans, copepods, ostracods, and mites; chironomid, trichopteran and ephemeropteran larvae; and bottom ooze.
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Based on diatom-inferred salinity and Mg/Ca ratios in ostracode calcite derived from sediment cores taken at three sites in North Dakota (USA) -- Moon Lake, Coldwater Lake and Rice Lake -- the authors constructed three 2000-year histories of lake-water salinity in order to infer regional patterns of drought.
New Content on CO2 Science
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Rare ostracods (microscopic crustaceans) support the mollusc evidence, with species typical of small or seasonal water bodies.
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Interestingly, the only ostracods with compound eyes are mostly very active swimmers; many are scavengers or predators.
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The coarser fraction of chalk consists mainly of the skeletal debris of foraminifera, calcispheres, bivalve fragments, echinoid plates, and bryozoan, ostracod, and coral debris.
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If lancelets and the fossil ostracoderms are considered out-groups to living craniates, then the brains of the earliest craniates must have been very small for their body size.
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Although phylogenetic tests in ostracods are relatively clear, morphological evidence is somewhat ambiguous.
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Enamel, or enameloid tissue covering tubercles, was clearly described in Ordovician vertebrates such as the ostracoderms.
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Ostracods shed the carapace with each molt, whereas the conchostracans simply add material to the carapace as they grow.
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The fossil content consists of ammonites, belemnites, brachiopods, echinoderms, bivalves, crinoids, gastropods, ostracodes and benthic foraminifers.
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The diurnal vertical migration of planktonic Ostracoda is studied based on the analysis of stratified samples of zooplanktons in the IONESS system.
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Ostracods are small crustaceans enclosed in a bivalved carapace.
Crustacea
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Mg/Ca ratios in ostracode Crustacea shells are influenced by the water temperature in which the shell is secreted and the Mg/Ca ratio in the water.
Post-1980 Proxies #3: Chesapeake Bay Mg/Ca « Climate Audit
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Sedimentological investigations indicate a lacustrine depositional setting proximal to the coast, an interpretation also supported by the pulmonate molluscs and ostracods.
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This lower interval has already been analysed for pollen, diatoms, ostracods, and gastropods.
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The fossil content consists of ammonites, belemnites, brachiopods, echinoderms, bivalves, crinoids, gastropods, ostracodes and benthic foraminifers.
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The ontogeny and dimorphic features of many early Middle Ordovician ostracode species are still poorly known.
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Other fossil seed, leaf, beetle, ostracod, snail and fish remains come from a carbonaceous siltstone that represents a local waterlogged habitat.
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On the whole the maxillopodan groups Ostracoda and Cirripedia and the Malacostraca have left the most significant fossil records.
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During this period the agnathan and gnathostome fishes, too, gave rise to many distinctive groups: the armoured ostracoderm and placoderms, the bony fishes, and elasmobranchs to populate marine and freshwater environments.
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On a new terrestrial genus and species of Scottiinae Crustacea, Ostracoda from Australia, with a discussion on the phylogeny and the zoogeography of the subfamily, Zoologischer Anzeiger, 243:21-36.
Archive 2008-04-01
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[[ostracoderm]] s jawless fish related to present-day [[lamprey]] s and
Conservapedia - Recent changes [en]
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Adult land-locked fish eat mostly zooplankton, especially larger varieties such as copepods, cladocerans, mysids, and ostracods.
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Ostracodes are small animals, most of which have a two valved shell.
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Adult land-locked fish eat mostly zooplankton, especially larger varieties such as copepods, cladocerans, mysids, and ostracods.
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Subtidal lithologies contain peloids, ostracodes, bivalves, gastropods and oncoids (with less common benthic foraminifera and calcareous algae).
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With their armored head shield and trunk shield composed of overlapping bony plates, the placoderms appear at first glance extremely similar to the ostracoderms (armoured jawless fish).
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Because of their size, the reticulations in the large and small mesh size fossil arthropods are unlikely to represent individual cells, counter to the situation found by Okada in modern ostracods.
