Ví dụ về việc sử dụng Crinoids trong Tiếng anh và bản dịch của chúng sang Tiếng việt
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These are crinoids, sponges, black corals.
Although the basic echinoderm pattern offivefold symmetry can be recognised, most crinoids have many more than five arms.
Crinoids 98% Inadunates and camerates died out.
In the Midwestern United States, fossilized segments of columnal crinoids are sometimes known as Indian beads.[23] Crinoids are the state fossil of Missouri.[24].
Crinoids comprise three basic sections; the stem, the calyx, and the arms.
This makes it highly likely that these sea urchins are predators of the crinoids, and that the crinoids flee, offering part of their stem in the process.[10].
Colorful crinoids at shallow waters of Gili Lawa Laut.
Specimens of the sea urchin Calocidaris micans present in a meadow of the crinoid Endoxocrinus parrae, have been shown to contain large quantities of stem portions(or columnals) in the direct vicinity of living crinoids, some of which were upended.
These are crinoids, sponges, black corals. There're some more fishes.
Aided by Count G. Münster he issued the important Petrefacta Germaniae(1826-1844), a work which was intended to illustrate the invertebrate fossils of Germany, but it was left incomplete after the sponges,corals, crinoids, echinids and part of the mollusca had been figured.
The majority of living crinoids are free-swimming and have only a vestigial stalk.
Crinoids feed by filtering small particles of food from the sea water with their feather like arms.
While it has been known that stalked crinoids move, before this recording the fastest motion of a crinoid was 0.6 metres/hour(2 ft/h) 0.167 mm/s(millimeters per second).
Crinoids usually have a stem used to attach themselves to a substrate, but many live attached only as juveniles and become free-swimming as adults.
Dense submarine thickets of long-stemmed crinoids appear to have flourished in shallow seas, and their remains were consolidated into thick beds of rock.
Crinoids Temporal range: Ordovician- Recent PreЄ Є O S D C P T J K Pg N Crinoid on the reef of Batu Moncho Island, Indonesia Scientific classification Kingdom: Animalia Phylum: Echinodermata Subphylum: Crinozoa Class: Crinoidea Miller, 1821[1] Subclasses Articulata(540 species)†Flexibilia†Camerata†Disparida.
Generally speaking, crinoids living in environments with relatively little plankton have longer and more highly branched arms than those living in rich environments.[9].
Some fossil crinoids, such as Pentacrinites, seem to have lived attached to floating driftwood and complete colonies are often found.
Grains are crinoid fragments.
After 10-16 months, the crinoid becomes ready to reproduce.
There are only about 600 extant crinoid species,[8] but they were much more abundant and diverse in the past.
The crinoid nervous system is divided into three parts, with numerous connections between them.
Examples of free-swimming crinoid fossils include Marsupitsa, Saccocoma, and Uintacrinus.
The 2005 recording showed a crinoid moving across the seabed at the much faster rate of 4 to 5 centimeters per second(144 to 180 meters per hour).
Fossilised crinoid columnal segments extracted from limestone quarried on Lindisfarne, or found washed up along the foreshore, were threaded into necklaces or rosaries, and became known as St. Cuthbert's beads.
The 2005 recording showed a crinoid moving much faster, at a rate of 4-5 centimeters/second(144 to 180 meters per hour).[16].
Even the free-swimming feather stars sometimes go through this stage, with the adult eventually breaking away from the stalk.[9]Within 10 to 16 months the crinoid will be able to reproduce.
Echmatocrinus is a problematic Cambrian animal which resembles a crinoid or an octocoral. It is known only from the Burgess shale.[1] 5 specimens of Echmatocrinus are known from the Greater Phyllopod bed, where they comprise< 0.1% of the community.[2].
Because of the great depths at which this crinoid lives, its behaviour has been little studied. When observed from a submersible, the roots were immersed in the sediment, the lower two thirds of the stem were held vertically and the upper third curved and the arms opened to form a filtration fan held perpendicular to the substrate and often slightly reflexed.
It is native to deep water in the North Atlantic Ocean.[1] It was first described by the Scottish marine zoologist Charles Wyville Thomson(who had been chief scientist on the Challenger Expedition) and named in honour of Pelham Aldrich, a British naval officer and explorer.[2]It is believed to be the crinoid living at the greatest depth.[3].