Spirifer
Fossil
Also called Spiriferid
About it
Winged brachiopod with a long straight hinge, a fold down the middle, and radiating ribs; the spiral support of its feeding organ is sometimes preserved inside. Common in Devonian and Carboniferous limestones worldwide.
- Type
- Fossil (brachiopod)
- Group
- Brachiopod
- Colours
- grey, brown, tan, gold
- Transparency
- opaque
- Periods
- Devonian, Carboniferous
Typical values: real specimens vary. For more, see mindat.org.