Introduction to Placozoa The simplest of all known animals. http://www.ucmp.berkeley.edu/phyla/placozoa/placozoa.html (Added: Mon Jul 02 2001)
Phylum Placozoa- the “Plate” Animals A description of this unispecific phylum. http://www.teaching-biomed.man.ac.uk/bs1999/bs146/biodiversity/placoz.htm (Added: Sat Jan 26 2002)