''Gymnocoidum'' is a genus of calcareous alga known from Permian strata.
For details of its classification, see
Gymnocodiaceae
This family of alga
Algae ( , ; : alga ) is an informal term for any organisms of a large and diverse group of photosynthetic organisms that are not plants, and includes species from multiple distinct clades. Such organisms range from unic ...
.
References
Enigmatic red algae taxa
Fossil algae
Red algae genera
{{red algae-stub