MONOMEROUS THALLI

Click here for illustrations
Click here for the coaxial thalli, here for the non-coaxial thalli, and here for the dimerous thalli.

	RECENT	FOSSIL
T H I N S E C T.			T H I N S E C T.
	Thin section images showing the basal non-coaxial core filaments running from left to right, parallel to the substrate (former hypothallus); they turn outward to form the peripheral filaments (former perithallus) which arranged at right angles to the substrate.
	RECENT	FOSSIL
S E M			S E M
	In opposite to the Recent example, the original cell walls of the fossil SEM-sample are leached and cell lumina are filled by sparry calcite.