Archaeocyathid
Fossil
Also called Archaeocyath and Archaeocyatha
About it
Cup- and cone-shaped Early Cambrian reef builders with two porous walls joined by radial partitions; most experts class them as sponges. Found in South Australia, Labrador, Nevada, California, and Siberia.
- Type
- Fossil (other)
- Group
- Archaeocyathid (sponge)
- Colours
- grey, white, cream, pink
- Transparency
- opaque
- Periods
- Cambrian
Typical values: real specimens vary. For more, see mindat.org.