Foissner & Stoeck 2006. Rigidothrix goiseri nov. gen., nov. spec. (Rigidotrichidae nov. fam.), a new 'flagship' ciliate from the Niger floodplain breaks the flexibility-dogma in the classification of stichotrichine spirotrichs (Ciliophora, Spirotrichea). European Journal of Protistology, 42(4), November 2006: 249-267