Definition & Betydelse | Engelska ordet TRILOBITE

Definition av TRILOBITE

1. trilobit

Exempel på hur man kan använda TRILOBITE i en mening

• In terms of anatomical comparison, the earliest redlichiid species are probably ancestral to all other trilobite orders and share many primitive characters.
• Walcott described Marrella informally as a "lace crab" and described it more formally as an odd trilobite.
• Walcott began his professional paleontology career by discovering new localities, such as the Walcott-Rust quarry in upstate New York and the Georgia Plane trilobite beds in Vermont, and by selling specimens to Yale University.
• Cotton & Braddy (2000) place it in a new "Trilobite clade" containing the Trilobita, recognizing the close affinities of the nektaspids to trilobites.
• One Asaphida line, the Superfamily Asaphoidea, shows a continuous evolution of eyestalks, from individuals with stubby eyes to Asaphus kowalewskii, a trilobite with long eyestalks.
• He was the first to describe a trilobite fossil found on the South Shetland Islands in the Antarctic, a pycnogonid, and the presence of glacial erratics.
• That so many species of trilobite developed eyestalks suggests that they were trying to overcome increased turbidity, or there was some sort of massive selective pressure leading these trilobites to bury themselves in the substrate up to their eyes.
• Considered the most diverse and abundant fossil site in the British Isles, more than 700 types of fossil have been found at the site, 86 of which are unique to the location, including Calymene blumenbachii, a trilobite nicknamed the Dudley Bug or Dudley Locust by 18th century quarrymen.
• Geological change is recognized by fossil signposts such as the giant trilobite, plesiosaur, and the mosasaur, who inhabited the area of what is now Manitoba nearly 80 million years ago.
• Cleber Redondo, a deputy art director, created image by digitally manipulating an image of a naked mole-rat, adding fangs and a "bony growth" (based on a trilobite) with a "red-hot" front edge.
• fluctivagus, fossils of olenid trilobite Jujuyaspis and planktonic graptolite Anisograptus matanensis are present in a nearby section.
• Its tiny compound eyes and the shovel-like anterior of the head suggests a burrowing lifestyle, and an exoskeleton marked with many small pores which, in life, probably housed hair-like sensory setae in life, allowed the trilobite to feel which portions of its body were covered with sediment.
• When used in paleontology, suture can also refer to fossil exoskeletons, as in the suture line, a division on a trilobite between the free cheek and the fixed cheek; this suture line allowed the trilobite to perform ecdysis (the shedding of its skin).
• There are various paleontologically significant objects, apart from the already mentioned graptolites it is possible to find the trilobite Warburgella rugulosa typical for the base of Devonian period, the conodont Icriodus wolschmidti and the chitinozoan Agnochitina chlupaci.
• The most promising cases of phylogenetic classification are those in which similar trace fossils show details complex enough to deduce the makers, such as bryozoan borings, large trilobite trace fossils such as Cruziana, and vertebrate footprints.
• If it were a nektonic or planktonic trilobite, the spherical glabellum, coupled with its rib cage-like pleural lobes and spine-like cephalon cheeks would have presented serious impediments to its hydrodynamic ability, and would have been either a drifter, or a very leisurely swimmer, feeding on phytoplankton, or slow-moving zooplankton.
• The Llandoverian Epoch ended with the Ireviken event which killed off 50% of trilobite species, and 80% of the global conodont species.
• The trilobite biozones can be useful to correlate and identify events in different places, like identifying unconformity sequences from a missing biozones or correlates events happening in a neighbouring block (like Tarim block).
• In the Hamilton Group of New York, they are found with Eldredgeops, Dipleura and Bellacartwrightia, a trilobite that resembles Greenops but has much larger pygidial spines.
• Ductina is a genus of extinct, small to average sized, eyeless phacopid trilobite, that lived during the Devonian.

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