 -- Z1C21X01
 -- Z1C21X01
 -- Z1C21S02
 -- Z1C21S03
- Nickname: Terminator
- Diagnosis: Large element with long cust with deep costa, and lateral
rami with wide-spaced denticles meeting in inverted "V"
- Collected: Site Z,
in Nashville, Tennessee, USA, from Upper Ordovician deposits.
- Estimated Age: about 450 million years old.
- Dimensions: scale bar is .5 mm
- Comments: Very long, sharp cusp. Z1C21S03 image not scaled.
|