Darriwilian (Middle Ordovician) worms of southern Sweden
| العنوان: | Darriwilian (Middle Ordovician) worms of southern Sweden |
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| المؤلفون: | Mats Eriksson, Petra Tonarová, Olle Hints, Anders Lindskog, Thomas Servais |
| المصدر: | GFF; 138(4), pp 502-509 (2016) |
| بيانات النشر: | Informa UK Limited, 2016. |
| سنة النشر: | 2016 |
| مصطلحات موضوعية: | Sweden, Palynology, scolecodonts, 010506 paleontology, Polychaete, orthoceratite limestone, biology, priapulids, Scolecodont, Paleontology, Geology, 010502 geochemistry & geophysics, biology.organism_classification, 01 natural sciences, Taxon, Middle Ordovician, Stage (stratigraphy), polychaetes, Ordovician, Assemblage (archaeology), 0105 earth and related environmental sciences |
| الوصف: | The record of scolecodonts (polychaete jaws) from the Ordovician of Sweden is very poor. In this paper, we document a Darriwilian (Middle Ordovician) assemblage recovered from palynological samples from the “orthoceratite limestone” (Lanna and Holen limestones) of Mount Kinnekulle, Västergötland, southern Sweden. The collection of diminutive specimens forms an assemblage taxonomically composed mainly of simple placognath (mochtyellids, xanioprionids) and ctenognath (tetraprionids) taxa, whereas labidognaths (polychaetaspids) and taxa with other evolutionary grade-type apparatuses are very rare or absent. In addition, putative priapulid (penis worm) teeth were identified, possibly representing the first fossil representatives recorded in Sweden. The highest scolecodont abundance coincides with the lower to middle part of the “Täljsten” interval (lower Kunda Baltoscandian Stage). These strata are interpreted as having been formed during a marked regressional phase, suggesting that the palaeobathymetry and/or bottom substrate was optimal for polychaete colonization at that time. This new assemblage from Kinnekulle adds to the global scolecodont record in which data on Middle Ordovician and older specimens are still rudimentary but of importance for understanding early polychaete phylogeny. |
| وصف الملف: | application/pdf |
| تدمد: | 2000-0863 1103-5897 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::86ede660fd80ea0fab2c4300d68d7746 https://doi.org/10.1080/11035897.2016.1181102 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....86ede660fd80ea0fab2c4300d68d7746 |
| قاعدة البيانات: | OpenAIRE |
PDF full text from Publisher | تدمد: | 20000863 11035897 |
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