(from the article `shipworm`) ...important shipworms, i.e., those causing the most damage, are members of the genus Teredo, which includes about 15 species. Other genera are ... Found on http://www.britannica.com/eb/a-z/x/3
Xy·loph'a·ga noun [ New Latin See Xylophagous .] (Zoology) A genus of marine bivalves which bore holes in wood. They are allied to Pholas. Found on http://www.encyclo.co.uk/webster/X/3