†Archaeocyathus (Spirocyathus) (archaeocyath sponge)
Archaeocyatha - Archaeocyathida - Archaeocyathidae
Alternative spelling: Spirocyathus
Parent taxon: Archaeocyathus according to V. J. Okulitch 1954
See also Okulitch 1950, Osadchaya et al. 1979 and Raymond 1931
Sister taxa: Archaeocyathus abacus, Archaeocyathus arborensis, Archaeocyathus atlanticus, Archaeocyathus chikinevae, Archaeocyathus dwighti, Flindersicyathus mcdamensis, Flindersicyathus aenigmatus, Sanxiacyathus sinuatus
Subtaxa: Archaeocyathus (Spirocyathus) yavorskii Spirocyathus constrictus
Ecology: stationary intermediate-level epifaunal suspension feeder
Distribution:
• Cambrian of Mexico (2 collections), the Russian Federation (7), United States (2: California)
Total: 11 collections each including a single occurrence