Laver: References & Edit History

Article Contributors

Primary Contributors

  • The Editors of Encyclopaedia Britannica
    Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree. They write new content and verify and edit content received from contributors.

Other Encyclopedia Britannica Contributors

Article History

Type Description Contributor Date
Article title updated for style. Nov 06, 2026
Invalidated site: Zipcode Zoo - Porphyra Vietnamensis. Dec 12, 2017
Expanded physical description. Feb 01, 2017
Add new Web site: The Natural History Museum - Porphyra Umbilicalis. Aug 09, 2010
Add new Web site: Zipcode Zoo - Porphyra Vietnamensis. Aug 08, 2010
Media added. Nov 02, 2007
Article revised and updated. Nov 02, 2007
Article added to new online database. Jul 20, 1998
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