The Andreaeales may perhaps be looked on as a divergent primitive branch of the same stock.    From Wordnik.com.  [Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria"] Reference

In the Andreaeales the columella does not extend to the upper end of the capsule, and the latter opens by a number of lateral slits.    From Wordnik.com.  [Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria"] Reference