11 
Anomobryum 
442-458 
41 
Anomodon 
459-488 
86 
Antitrichia 
489-499 
27 
Aongstroemia 
500-513 
22 
Aongstroemiopsis 
514-515 
4 
Aptychella 
516-525 
23 
Aptychopsis 
526 
1 
Archidium 
527-537 
24 
Arthrocormus 
538-540 
9 
Aschisma 
541-542 
8 
Astomum 
543-548 
11 
Atractylocarpus 
549 
1 
Atrichopsis 
549a 
2 
Aulacomnium 
550-563 
42 
Aulacopilum 
564-568 
6 
Austinia 
569-571 
6 
Baldwiniella 
572 
1 
Barbella 
573-617 
103 
Barbula 
618-789 
464 
Barnesia 
790 
1 
Bartramia 
791-830 
112 
Bartramidula 
831-838 
12 
Bartramiopsis 
839 
2 
Bellia 
840 
1 
Bescherellia 
841-844 
10 
Bestia 
845 
3 
Bissetia 
846 
2 
Blindia 
847-853 
14 
Boulaya 
854 
2 
Brachelyma 
855 
1 
Brachydontium 
856-858 
8 
Brachymenium 
859-899 
226 
Brachythecium 
900-1014 
395 
Braithwaitea 
1015 
4 
Braunfelsia 
1016-1022 
19 
