[Taxacom] a game of 2 letter generic names

[Kenneth Kinman]

Hi Stephen,
      Ia, as in Ia io (Chiroptera)
      Ba, as in Ba humbugi (Mollusca)

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Stephen wrote:
2 letter generic names pose some frustrating problems for searches.
For example, if you do an ION search, you get a big red error message
saying 'Query should be at least 2 characters long' !!! Eg.
http://www.organismnames.com/query.htm?q=Ea&searchType=simple&so=a0 
I currently know 3 such names in zoology, Aa, Do, and Ea (see details
here: http://species.wikimedia.org/wiki/Category:2_letter_genera) 
does anyone know of any others (in zoology)?