are two basic arthrodontous peristome types. The first type is termed haplolepidous and consists of a single circle of 16 peristome teeth. This type of peristome is characteristic of subclass Dicranidae. The second type is the diplolepidous peristome found in subclasses Bryidae, Funariidae, and Timmiidae. In this type, there are two rings of peristome teeth—an inner endostome (short for endoperistome) and an exostome. The endostome is a more delicate membrane, and its teeth are aligned between the teeth of the exostome. There are a few mosses in the Bryopsida that have no peristome in their capsules. These mosses still undergo the same cell division patterns in capsule development, but the teeth do not fully develop. Classification In the past, the group Bryopsida included all mosses. Current circumscriptions of the group are more limited. Phylogeny A detailed phylogeny to the level of order, based on the work by Novíkov & Barabaš-Krasni 2015; Cole, Hilger & Goffinet 2021; Fedosov et al. 2016; Ignatov, Fedosov & Fedorova 2016. References Plant classes