Trilobita
Trilobita (trilobites; phylum Arthropoda) The most primitive arthropod class, known from more than 3900
fossil species. Inhabitants of
Palaeozoic seas, the trilobites appeared first in the early
Cambrian, had their widest distribution and greatest diversity in the Cambrian and
Ordovician Periods, and became extinct in the
Permian. The body was divided into three regions: an anterior
cephalon, comprising at least five, fused segments; a mid-body or
thorax, with a varying number of segments; and a hind region or
pygidium. All three regions were divided by a pair of furrows running the length of the body, giving a trilobite appearance (i.e. a median or axial lobe, flanked on either side by a lateral lobe). The mouth was situated in the middle of the central surface of the cephalon. Paired gill-bearing limbs were attached to the membranaceous,
pleural skeleton. X-ray studies show the eyes to have resembled the compound eyes of living arthropods (see
TRILOBITE EYE). Trilobites ranged in size from 0.5mm long planktonic (see
PLANKTON) forms to those nearly 1m in length; most species were 3–10 cm long. There were 9 orders:
Redlichiida;
Agnostida;
Naraoiidae;
Corynexochida;
Lichida;
Phacopida;
Ptychopariida; Asaphida; and
Proetida.
Cite this article
Pick a style below, and copy the text for your bibliography.
|
AOL EUROPE: AOL Europe launches AOL Europe In Interactive Marketing Group.
M2 Presswire; 9/6/1999; 700+ words
; M2 PRESSWIRE-6 September 1999-AOL EUROPE: AOL Europe launches AOL Europe Interactive Marketing Group (C)1994-99 M2 COMMUNICATIONS LTD RDATE:030999 * New pan-European advertising and e-commerce team for portfolio of world-leading...
|
|
Europe vs. United States: Which Industries are Leading the Global Productivity Race? Productivity Gains for Europe: there's good news - and bad.
PR Newswire; 6/27/2002; 700+ words
; ...of Information and Communication Technology (ICT) in Europe is underway, and if the ICT revolution in Europe looks familiar there is good reason. It appears that ICT diffusion in Europe is following a remarkably similar pattern across industries...
|
|
Europe adrift.
Magazine article from: World and I; 3/1/1998; ; 700+ words
; ...and political stability are examined as Europe adjusts to posh-Cold War realities...since 1989 have brought great changes to Europe, which is in a truly historic transition...undoubtedly continue and will determine Europe's self-identity, role in the twenty...
|
|
Europe '92: A Crusade, Not Just Trade
Newspaper article from: The Washington Post; 6/18/1989; ; 700+ words
; ...Americans make a mistake to think of the "Europe 1992" concept as merely a drive for a...that's the basic sales pitch made by Europe 1992 promoters. But beyond that, it...Europeans in the past few weeks, that Europe 1992 in the minds of some ardent advocates...
|
|
Europe 1992 poses a challenge for the US electronics industry. (Technology Update)
Magazine article from: EDN; 10/27/1988; ; 700+ words
; Europe 1992 poses a challenge for the US electronics...market products destined for customers in Europe. In 1992, the European Community's...neighbors. But it's far from certain that Europe will become more hospitable to foreign competitors...
|
|
SETAC Europe Hiring A New Executive Director
News Wire article from: Targeted News Service; 12/19/2008; 700+ words
; ...issued the following news release: SETAC Europe Executive Director Dr. Bart Bosveld is...congratulating and wishing him well, SETAC Europe is looking for candidates for the position of SETAC Europe Executive Director. (80% - 100% time...
|
|
Europe*Star Finalizes STELLAT Joint Venture With France Telecom.
Business Wire; 2/14/2001; 700+ words
; ...BUSINESS WIRE)--Feb. 14, 2001 Europe*Star and France Telecom have finalized...provide fixed satellite services across Europe, Africa, and the Middle East. The new...Stellat offers a unique opportunity for Europe*Star to accelerate and extend the coverage...
|
|
|
Europe Refining Industry to 2013 Investment Opportunities, Analysis and Forecasts of All Active and Planned Refineries in Europe.
Business Wire; 2/20/2009; 700+ words
; ...industry is available in its catalogue. Europe Refining Industry to 2013 Investment Opportunities...of All Active and Planned Refineries in Europe http://www.reportlinker.com/p0102230/Europe-Refining-Industry-to-2013-Investment...
|
|
|
Europe's Campaign Against Turkey
Newspaper article from: The Washington Post; 11/20/2002; ; 700+ words
; ...this direction lies not in America's hands but in Europe's. And Europe is about to blow it. Next month the European Union...Turkey was a candidate to join, becoming part of Europe has been Turkey's national obsession. Despite the...
|
|
Europe's b-to-b boom tantalizes U.S. firms; But diverse cultural and business environments make ventures tricky.(Statistical Data Included)
Magazine article from: B to B; 11/20/2000; ; 700+ words
; Europe's online b-to-b marketing efforts...be mistaken to think pushing forward in Europe is a walk in the park. A close examination...race to do business on the Web. To win in Europe, U.S. companies need to be adept at...
|
|
Europe
Book article from: The Columbia Encyclopedia, Sixth Edition
Europe , 6th largest continent, c.4,000...Strait of Gibraltar separate it from Africa. Europe is washed in the north by the Arctic Ocean...15,771 ft/4,807 m) in the Alps. Europe's lowest point (92 ft/28 m below sea...
|
|
Europe, James Reese 1880-1919
Book article from: Contemporary Black Biography
James Reese Europe 1880-1919 Musician, bandleader, musical...of the twentieth century, James Reese Europe emerged as the most renowned African American...dancing team of Irene and Vernon Castle, Europe became a major figure in promoting the...
|
|
Europe, Idea of
Dictionary entry from: New Dictionary of the History of Ideas
EUROPE, IDEA OF. In classical times Europe was above all a geographical and mythological notion, the word...bull brought her to the island of Crete. In the Middle Ages, Europe was identified with Western Christianity or the commonwealth...
|
|
Europe Through the Back Door Inc.
Book article from: International Directory of Company Histories
Europe Through the Back Door Inc. 130 4th Avenue...Tour Operators; 624190 Travel Aid Centers Europe Through the Back Door Inc. (ETBD) is...Steves reluctantly took his first journey to Europe with his parents. Steves' father and mother...
|
|
Conventional Forces in Europe Treaty
Encyclopedia entry from: West's Encyclopedia of American Law
CONVENTIONAL FORCES IN EUROPE TREATY The United States, the Soviet...Pact signed the Conventional Forces in Europe (CFE) Treaty on November 19, 1990...creating greater military stability in Europe. The CFE played a crucial stabilizing...
|
