Perichaetia lateral

In conclusion, the question, Did pleurocarpous mosses originate before the Cretaceous has to be answered, Yes, they did. Overall similarity and, especially lateral perichaetia of Palaeodichelyma provide enough evidence for this. Even if the dating of the deposits with Palaeodichelyma shifts to the basal Cretaceous, the fact of its distribution in several localities means its origin must be at least in the Late Jurassic. Bryokhutuliinia and Muscites fontinaloides can also be pleurocarps, though additional evidence is necessary to say this for sure. 

Camptochaete arbuscula (Figure 15.3A) has an architectural unit made up of a primary module, consisting of a stolon, stipe and frond axis secondary modules, determinate lateral branches of the frond axis, the frond axis and the lateral branches together making up the frond tertiary modules, determinate lateral branches of the secondary modules perigonia and perichaetia (lateral on secondary fertile axes on the frond axis) and flagelliferous frond axis tips which become... 

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