This page represents the following TreeOfLife-200M taxonomic path.[1]
Direct image inspection for museum specimen photographs from the TreeOfLife-200M records was not possible in this environment (image host returned access errors). Therefore, the visual description below focuses on higher-level, architecture-based morphology reported for the class in the available literature summary.
Agyrekocyathus (treated in the source within the Archaeocyatha framework, class-level usage) is characterized by nonspiculate, calcareous archaeocyathan cups. These cups have microgranular microstructure and, in most cases, are composed of original magnesium calcite.
Cup architecture is typically archaeocyathan, with one or two porous walls surrounding an inner/central cavity. The intervallum (the space between walls and cavity) may contain internal skeletal elements such as septa (porous/aporous), pseudosepta, taeniae/pseudotaenial networks, dictyonal networks, syringes, and/or tabulae. A minority of taxa show alternative cup architecture described as chaetetid or thalamid (successive-chamber) construction.
Forms may be solitary or modular, and some taxa exhibit a secondary calcareous skeleton.
The class-level taxon is reported with a Cambrian temporal range (Terreneuvian–Furongian).
The source reports that “Agyrekocyathus” corresponds to class-level usage within Archaeocyatha, with historical equivalence and synonymy involving rank/orthography changes (including names such as “Archaeocyathinae” and related substituted forms).