Calcicaulis V.P. Shuysky & D.I. Schirschova in V.P. Shuysky, 1987 genus accepted

Catenaella V.P. Shuysky, 1987 genus accepted

Boodleaceae Børgesen, 1925 family accepted

Bestjachica P.N. Kolosov in A.K. Bobrov, 1970 genus accepted

Issinella E.A. Reitlinger, 1954 genus accepted

Parmacaulis V.P. Shuysky & D.I. Schirschova in V.P. Shuysky, 1987 genus accepted

Culmiella V.P. Shuysky in V.P. Shuysky & D.I. Schirschova in V.N. Dubatolov & T.A. Moskalenko, 1988 genus accepted

Siphonocladaceae Schmitz, 1879 family accepted

Valoniaceae Kützing, 1849 family accepted