Advertisement.

EnchantedLearning.com is a user-supported site.
As a bonus, site members have access to a banner-ad-free version of the site, with print-friendly pages.
Click here to learn more.

ad
(Already a member? Click here.)


EnchantedLearning.com Trilobite Go To a Trilobite Printout

Trilobites are extinct, hard-shelled marine animals that lived in the seas millions of years ago. They evolved at the beginning of the Paleozoic Era (over 500 million years ago) and went extinct during the late Permian period (248 million years ago). The Cambrian Period is known as "The Age of Trilobites."

Trilobites were very common and very diverse; over 15,000 species of trilobites are known. Some trilobites crawled along the sea floor, some swam, and others drifted with ocean currents. The different trilobite species probably had different diets; some were herbivores (eating plants), some were detrivores (eating decayed material) and some were scavengers (eating carrion).


Anatomy: Trilobites were marine invertebrates that had hard, three-lobed shells (the axial lobe and two pleural lobes), hence the name "trilobite". The body is divided into three parts, the cephalon (head), the segmented thorax, and the pygidium (tail piece). These arthropods had jointed legs, compound eyes, and antennae. They ranged in size from less than 1/4 inch (0.6 cm) to over 2 feet (0.6 m) long.

Protection: Many trilobites had protective spines. Some could roll up into a ball, and some could burrow into the sea floor.

Classification:Trilobites belonged to the Kingdom Animalia (animals), Phylum Arthropoda (arthropods), Superclass Trilobitomorpha, Class Trilobita, Orders (8): Agnostida, Asaphida, Corynexochida, Lichida, Phacopida, Proetida, Ptychopariida, Redlichiida.

Go To a Trilobite Printout



Information Sheets About Dinosaurs
(and Other Prehistoric Creatures)

Just click on an animal's name to go to that information sheet. If the dinosaur you're interested in isn't here, check the Dinosaur Dictionary or the list of Dinosaur Genera. Names with an asterisk (*) were not dinosaurs.
How to write a great dinosaur report.

For dinosaur printouts, click here.

For brief dinosaur fact sheets, click here.




Enchanted Learning®
Over 35,000 Web Pages
Sample Pages for Prospective Subscribers, or click below

Overview of Site
What's New
Enchanted Learning Home
Monthly Activity Calendar
Books to Print
Site Index

K-3
Crafts
K-3 Themes
Little Explorers
Picture dictionary
PreK/K Activities
Rebus Rhymes
Stories
Writing
Cloze Activities
Essay Topics
Newspaper
Writing Activities
Parts of Speech

Fiction
The Test of Time

Biology
Animal Printouts
Biology Label Printouts
Biomes
Birds
Butterflies
Dinosaurs
Food Chain
Human Anatomy
Mammals
Plants
Rainforests
Sharks
Whales
Physical Sciences: K-12
Astronomy
The Earth
Geology
Hurricanes
Landforms
Oceans
Tsunami
Volcano
Languages
Dutch
French
German
Italian
Japanese (Romaji)
Portuguese
Spanish
Swedish
Geography/History
Explorers
Flags
Geography
Inventors
US History

Other Topics
Art and Artists
Calendars
College Finder
Crafts
Graphic Organizers
Label Me! Printouts
Math
Music
Word Wheels

Click to read our Privacy Policy

E-mail


Enchanted Learning Search

Search the Enchanted Learning website for:



Advertisement.

Advertisement.


Copyright ©2001-2018 EnchantedLearning.com ------ How to cite a web page