The earliest cornulitid on the internal surface of the illaenid pygidium from the Middle Ordovician of Estonia
The earliest cornulitid Cornulites sp. appears in the Darriwilian (Lasnamägi Regional Stage) of Estonia. Internal annulation is present in all Middle Ordovician cornulitids and could be a plesiomorphic character for the group. The encrusted trilobites are rare in the Ordovician of Estonia. Illaenid...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Estonian Academy Publishers
2017-10-01
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| Series: | Estonian Journal of Earth Sciences |
| Subjects: | |
| Online Access: | http://www.kirj.ee/public/Estonian_Journal_of_Earth_Sciences/2017/issue_4/earth-2017-4-193-197.pdf |