Exostome striations

The peristomes of Erythrodontium often have an exostome truncated at or just above the horizontal striations. This was particularly common in E. julaceum (Schwaegr.) Par Erythrodontium barteri (Mitt.) Broth, has a consistent pattern of ornamentation, with the horizontal and vertical ornamentation overlain with papillae, fusions and occlusions and forming a distinctive pattern on the OPL combined with a consistent reticulate ornamentation on the upper exostome PPL (Figure 12.2C and Figure 12.3B). 

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