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trilobite

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n. 三叶虫

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三叶虫

WordNet (r) 3.0 (2006) (WordNet)

trilobite
n 1: an extinct arthropod that was abundant in Paleozoic times;
had an exoskeleton divided into three parts

The Collaborative International Dictionary of English v.0.48 (gcide)

Trilobite \Tri"lo*bite\ (tr[imac]"l[-o]*b[imac]t), n. [Cf. F.
trilobite. See {Trilobate}.] (Paleon.)
Any one of numerous species of extinct arthropods belonging
to the order Trilobita. Trilobites were very common in the
Silurian and Devonian periods, but became extinct at the
close of the Paleozoic. So named from the three lobes usually
seen on each segment.
[1913 Webster]

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Ordovician Trilobites: Flexicalymene meeki, Flexicalymene retrorsa . . .
The third image is of a prone Flexicalymene retrorsa (my identification) trilobite from the Arnheim formation in Mt Orab, Ohio Note the relatively narrow cephalon (head) Image 4 is of a Isotellus maximus trilobite from the Ordovician Arnheim formation in Mt Orab, Ohio
Oklahoma Trilobites - Theisen Quarry - The Fossil Forum
Thank you for the very nice report on your visit to the Theisen Trilobite quarry In June of 2014, I had the pleasure to fossil hunt with Leon and thoroughly enjoyed it
Trilobite Papers 1762–2025: Years in Review - Page 2 - Fossil News . . .
Here is the complete list of 152 trilobite papers published in 2018 Page one of this thread is reserved for the previous years to be added in the near future Alberti, M 2018 Leonaspis bassei n sp (Trilobita, Odontopleuridae) aus dem basalen Rupbach-Schiefer (Ober-Emsium; Rhenoherzynikum) [Leonaspis bassei n sp (Trilobita, Odontopleuridae) from the basal Rupbach Slate (Upper Emsian
States (in the U. S. ) Where Trilobites Have and have not been Found
I did lots of online searching on which states trilobites have and haven't been found in, and compiled this Its not as straight forward as you might think Green means trilobites have been found in that state on the surface and are native to that area Yellow means technically a trilobite has be
Thiesen Trilobite Quarry In Ok - The Fossil Forum
We visited the Leon Thiesen's trilobite quarry near Clarita, Oklahoma last month We found a fairly complete set of fauna including six or seven species of trilobites
Trilobite City - Lake Cayuga, Ny - The Fossil Forum
Trilobite City - Trip Report - Lake Cayuga, NY Nan and I wanted to combine fossils and fishing at Lake Cayuga, one of the finger lakes and one of our favorite places in New York but we didn't know if there were any fossils there A little Google research revealed that there are a dozen gorges (we hiked at one) and several very good fossil sites
New York Trilobite sites. please - The Fossil Forum
I will be in Western NY on Sunday and Monday this coming weekend, and would like some recommendations for sites to visit I will be travelling from NY City to Canandaigua, and am willing to stop on the way if there is an interesting trilobite collecting site--I am flexible on which way I drive, e
Could trilobites still be alive? Any sightings of them? - Reddit
Trilobites are probably the most famous type of creature that is said to have died out during the Permian-Triassic Extinction event 250 million years ago, but given the vastness of the ocean and the fact that we've only explored very little of it, I think it's possible for the trilobite to still be alive Has anyone heard of any supposed trilobite sightings?
Collecting Lower Cambrian Trilobites In The Mojave Desert
6 Marble Mountain Fossil Beds Amboy DAG One of the classic Cambrian trilobite fossil sites in the western U S is located at this beautiful outcrop in a 60 foot thick formation over 550 million years old Trilobites were small marine crustaceans that resembled modern day horseshoe crabs
Possible reasons for survival of proetidan trilobites past the Devonian
It's well-known that extinction events at the end of the Devonian wiped out all trilobite groups except Proetida, which survived until the mass extinction at the end of the Permian Has there been research in recent years as to why proetidan trilobites outlived the Devonian?

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