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Article: Loricifera
- Article from:
- The Columbia Encyclopedia, Sixth Edition
CopyrightThe Columbia Encyclopedia, Sixth Edition. Copyright 2008 Columbia University Press. (Hide copyright information)
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Loricifera , phylum of microscopic animals discovered in 1974. They have spiny heads and unsegmented bodies encased in a vase-shaped anterior that can retract into the posterior trunk. Although research shows that the sexes are separate and they have a large brain, little else is known about them. Because they adhere tightly ...
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Article: Metamorphosis
Animal Sciences;
700+ words
... ... biology means the transition from a larval stage to an adult stage. In most animals ... development leads to the formation of a larval stage with very different characteristics ... The planula stage is the free-living larval stage. The medusa stage involves a single ...
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