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 |
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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 |
| _version_ | 1811316359066288128 |
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| author | Olev Vinn Ursula Toom Mare Isakar |
| author_facet | Olev Vinn Ursula Toom Mare Isakar |
| author_sort | Olev Vinn |
| collection | DOAJ |
| description | 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 pygidia and cranidia were encrusted by cornulitids and trepostome bryozoans. The encrustation of both Middle Ordovician and Late Ordovician trilobites took place post mortem. The studied hard substrate communities of Middle Ordovician and Late Ordovician trilobite pygidia and cranidia are typical of the Ordovician. |
| first_indexed | 2024-04-13T11:47:18Z |
| format | Article |
| id | doaj.art-9c4f2708f2334a4788e1422a785a5fbd |
| institution | Directory Open Access Journal |
| issn | 1736-4728 1736-7557 |
| language | English |
| last_indexed | 2024-04-13T11:47:18Z |
| publishDate | 2017-10-01 |
| publisher | Estonian Academy Publishers |
| record_format | Article |
| series | Estonian Journal of Earth Sciences |
| spelling | doaj.art-9c4f2708f2334a4788e1422a785a5fbd2022-12-22T02:48:09ZengEstonian Academy PublishersEstonian Journal of Earth Sciences1736-47281736-75572017-10-0166419319710.3176/earth.2017.1910.3176/earth.2017.19The earliest cornulitid on the internal surface of the illaenid pygidium from the Middle Ordovician of EstoniaOlev Vinn0Ursula Toom1Mare Isakar2Department of Geology, Institute of Ecology and Earth Sciences, University of Tartu, Ravila 14A, 50411 Tartu, Estonia; olev.vinn@ut.eeDepartment of Geology, School of Science, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia; ursula.toom@ttu.eeGeological Museum, Natural History Museum, University of Tartu, Vanemuise 46, 51014 Tartu, Estonia; mare.isakar@ut.eeThe 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 pygidia and cranidia were encrusted by cornulitids and trepostome bryozoans. The encrustation of both Middle Ordovician and Late Ordovician trilobites took place post mortem. The studied hard substrate communities of Middle Ordovician and Late Ordovician trilobite pygidia and cranidia are typical of the Ordovician.http://www.kirj.ee/public/Estonian_Journal_of_Earth_Sciences/2017/issue_4/earth-2017-4-193-197.pdftrilobitesencrustationtentaculitoidscornulitidsOrdovicianBaltica. |
| spellingShingle | Olev Vinn Ursula Toom Mare Isakar The earliest cornulitid on the internal surface of the illaenid pygidium from the Middle Ordovician of Estonia Estonian Journal of Earth Sciences trilobites encrustation tentaculitoids cornulitids Ordovician Baltica. |
| title | The earliest cornulitid on the internal surface of the illaenid pygidium from the Middle Ordovician of Estonia |
| title_full | The earliest cornulitid on the internal surface of the illaenid pygidium from the Middle Ordovician of Estonia |
| title_fullStr | The earliest cornulitid on the internal surface of the illaenid pygidium from the Middle Ordovician of Estonia |
| title_full_unstemmed | The earliest cornulitid on the internal surface of the illaenid pygidium from the Middle Ordovician of Estonia |
| title_short | The earliest cornulitid on the internal surface of the illaenid pygidium from the Middle Ordovician of Estonia |
| title_sort | earliest cornulitid on the internal surface of the illaenid pygidium from the middle ordovician of estonia |
| topic | trilobites encrustation tentaculitoids cornulitids Ordovician Baltica. |
| url | http://www.kirj.ee/public/Estonian_Journal_of_Earth_Sciences/2017/issue_4/earth-2017-4-193-197.pdf |
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