Affinity Nematothallus

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apertures in nematothallopsis fringed filaments , sporting further development



a nematothallopsis aperture fringed multi-cellular filaments



spores surrounding aperture in nematothallopsis


some material assigned nematothallus closely resembles lichens, suggesting lichenous habit – although lichens evolved 5 times independently, not establish genetic affinity. biochemistry of organism not inconsistent algal affinity, edwards (1982) considers unlikely algae preserved coalified impressions. however, edwards note surface patterning have been produced in similar fashion surface layers in green algae – is, ends of tightly packed filaments causing indentation on surface layer. (just because formed in same way doesn t mean formed green algae, though.) affinity, aperture-bearing cuticles, coralline red algae; absence of biomineralization suggests stem-group level affiliation. whereas smith & butterfield contend material separate charcoalified lichen-like material, edwards insists material comes same lichen-like organism.








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