Fissidens subgen. Aloma, the scariosus- and bryoides-type of peristome in the light of the phylogenetic tree by Suzuki et al.

Abstract

The scariosus type of peristome and the bryoides peristome were considered by Pursell and Bruggeman-Nannenga to be diagnostic for subgen. Aloma and subgen. Fissidens respectively. Several later authors did not recognize these peristome types nor did they recognize subgen. Aloma. In a recent molecular study, however, subgen. Aloma emerges as a clade of equal rank to subgenus Fissidens. Based on this and on numerous observations of peristomes the scariosus- and bryoides-type peristome are retrieved from oblivion, compared to each other, re-described and illustrated.