Sentences with phrase «basal phylum»
Sponges or Porifera — there are over 8,000 species currently recognised — are the most basal phylum of metazoans.
https://www.sciencedaily.com/ Not exact matches
Finally, they conjecture that the basal animal phyla (Porifera, Cnidaria, Ctenophora) diverged between about 1200 and 1500 million years ago.