Richi has mentioned nearly all the Ptychochromis mentioned in Jean-Claude and Patrick's book. However, there are also 2 others, Pty. sp. Tarantsy and Pty. sp. Manampanihy, so it would seem that there are several species within the Ptychochromis genus.
Regarding the English version of the Mada book, next week, I am going to Patrick's home in Switzerland to complete the final English correction. Hopefully the book will be published in the near future.