The Metzgeriales traditionally included fourteen families, as follows:
Allisoniaceae *
Aneuraceae
Calyculariaceae *
Fossombroniaceae *
Hymenophytaceae
Makinoaceae
Metzgeriaceae
Mizutaniaceae
Moerckiaceae
Pallaviciniaceae
Pelliaceae *
Petalophyllaceae *
Phyllothalliaceae
Sandeothallaceae *
Families marked with an asterisk * were classified in the separate order Fossombroniales by Crandall-Stotler and Stotler, but this grouping is not supported by subsequent analysis using DNA sequences.

Two additional families were formerly included within the Metzgeriales, but since have been transferred to other classes of liverwort.
 The Blasiaceae has been assigned its own order Blasiales, and phylogenetic studies show that it is more closely related to the Marchantiales than to members of the Metzgeriales.
 Likewise, the Treubiaceae is now in its own order Treubiales, within the recently recognized class Haplomitriopsida.

A 2016 analysis of liverwort classification has further reduced the Metzgeriales to include only two families, Metzgeriaceae and Aneuraceae, with all other previously included families dispersed into three additional orders: Fossombroniales, Pallaviciniales, and Pelliales.
The Metzgeriales traditionally included fourteen families, as follows:
Allisoniaceae *
Aneuraceae
Calyculariaceae *
Fossombroniaceae *
Hymenophytaceae
Makinoaceae
Metzgeriaceae
Mizutaniaceae
Moerckiaceae
Pallaviciniaceae
Pelliaceae *
Petalophyllaceae *
Phyllothalliaceae
Sandeothallaceae *
Families marked with an asterisk * were classified in the separate order Fossombroniales by Crandall-Stotler and Stotler, but this grouping is not supported by subsequent analysis using DNA sequences.
Two additional families were formerly included within the Metzgeriales, but since have been transferred to other classes of liverwort.  The Blasiaceae has been assigned its own order Blasiales, and phylogenetic studies show that it is more closely related to the Marchantiales than to members of the Metzgeriales.  Likewise, the Treubiaceae is now in its own order Treubiales, within the recently recognized class Haplomitriopsida.
A 2016 analysis of liverwort classification has further reduced the Metzgeriales to include only two families, Metzgeriaceae and Aneuraceae, with all other previously included families dispersed into three additional orders: Fossombroniales, Pallaviciniales, and Pelliales.
Metzgeriales