| Share
 

crustacean

Types of Crustaceans

The most important classes of Crustacea are Branchiopoda, which includes the brine shrimp; Maxillopoda, which includes the barnacles and copepods; Ostracoda, which includes the mostly very small seed shrimp; and Malacostraca, which includes the familiar shrimp, crayfish, lobsters, and crabs. Most of the smaller marine crustaceans can be found in plankton (see marine biology) and thereby occupy an important position in the marine food chain. For example, the crustacean subclass Copepoda supplies the food of the crustacean crustacean order Euphausiacea, the euphausids or krill, shrimplike creatures that are the food of baleen whales and other marine animals. Other copepods supply food for small fish, and still others exist as parasites on the skin and gills of fish. Best known of the smaller freshwater crustaceans are members of the genus Daphnia (water fleas), the fairy shrimp (a phyllopod that swims inverted), and Cyclops (a copepod). The order Isopoda includes the only large group of truly terrestrial crustaceans. Known as woodlice, sow bugs, or pillbugs, these small animals can be found under the bark of trees, beneath stones and rocks, and in other damp places. When disturbed they curl up armadillolike, withdrawing into the exoskeleton.

Sections in this article:

The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.

More on crustacean Types of Crustaceans from Infoplease:

See more Encyclopedia articles on: Zoology: Invertebrates


Premium Partner Content
HighBeam Research
Documents Images and Maps Reference
(from Newspapers, Magazines, Journals, Newswires, Transcripts and Books)

Research our extensive archive of more than 80 million articles from 6,500 publications.

Additional search results provided by HighBeam Research, LLC. © Copyright 2005. All rights reserved.

24 X 7

Private Tutor

Click Here for Details
24 x 7 Tutor Availability
Unlimited Online Tutoring
1-on-1 Tutoring