Isopoda is an
order of
crustaceans that includes
woodlice and their relatives. Most isopods are small greyish or whitish animals with rigid, segmented
exoskeletons. They have two pairs of
antennae, seven pairs of jointed limbs on the
thorax, and five pairs of branching
appendages on the
abdomen for
respiration.
Aquatic species live in marine or freshwater habitats, mostly on the bottom, but some can swim for a short distance.
Terrestrial forms tend to be found in cool, moist places. Around 4,500 species dwell in salt water, 500 in fresh water and another 5,000 on land. Some isopods eat dead or decaying plant and animal matter, others are
grazers or strain food particles from the water around them, a few are
predators, and some are parasitic, mostly on fish. Some species are able to roll themselves into a ball to conserve moisture or as a defence mechanism. The fossil record of isopods dates back to the
Carboniferous period (in the
Pennsylvanian epoch), at least 300 million years ago, when they lived in shallow seas. (
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Yahoo! confirms that hackers infiltrated its network in late 2014 and stole information associated with at least 500 million user accounts – the largest
data breach reported to date.
1963 – The University of East Anglia was founded in
Norwich, England, after talk of establishing such a university in the city began as early as the 19th century.
This Wikipedia is written in
English. Started in 2001 (2001), it currently contains
5,251,295 articles.
Many other Wikipedias are available; some of the largest are listed below.
Isopoda is an
order of
crustaceans that includes
woodlice and their relatives. Most isopods are small greyish or whitish animals with rigid, segmented
exoskeletons. They have two pairs of
antennae, seven pairs of jointed limbs on the
thorax, and five pairs of branching
appendages on the
abdomen for
respiration.
Aquatic species live in marine or freshwater habitats, mostly on the bottom, but some can swim for a short distance.
Terrestrial forms tend to be found in cool, moist places. Around 4,500 species dwell in salt water, 500 in fresh water and another 5,000 on land. Some isopods eat dead or decaying plant and animal matter, others are
grazers or strain food particles from the water around them, a few are
predators, and some are parasitic, mostly on fish. Some species are able to roll themselves into a ball to conserve moisture or as a defence mechanism. The fossil record of isopods dates back to the
Carboniferous period (in the
Pennsylvanian epoch), at least 300 million years ago, when they lived in shallow seas. (
Full article...)
Yahoo! confirms that hackers infiltrated its network in late 2014 and stole information associated with at least 500 million user accounts – the largest
data breach reported to date.
1963 – The University of East Anglia was founded in
Norwich, England, after talk of establishing such a university in the city began as early as the 19th century.
This Wikipedia is written in
English. Started in 2001 (2001), it currently contains
5,251,295 articles.
Many other Wikipedias are available; some of the largest are listed below.