The inclusion of Cyclostomata in Gymnolaemata is inaccurate - it may reflect an obsolete classification.
Cyclostomata is the only extant Order in Stenolaemata. It contains six Suborders - Articulata etc.
There are roughly 24 extant families - Crisiidae etc. Some of these are in the Stenolaemata Class, without specified Order.
I intend to make these corrections soon See Classification in the "Bryozoa Home Page":
Phil Bock 11 March 2005