Lorica (biology) | Wikipedia audio article
Channel: wikipedia tts
Date: 30/10/2018

This is an audio version of the Wikipedia Article:
Lorica (biology)

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SUMMARY
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In biology, a lorica is a shell-like protective outer covering, often reinforced with sand grains and other particles that some protozoans and loriciferan animals secrete. Usually it is tubular or conical in shape, with a loose case that is closed at one end. An example is the protozoan genus Stentor, in which the lorica is trumpet-shaped. In the tintinnids, the  lorica is frequently transparent and is used as domicile. Halofolliculina corallasia has a lorica that is attached  as an outer structure, and into which it retracts when disturbed.
There are three phases in the formation of lorica: agglomeration in a natural cast; helical extension; and stabilization.