| Bulletin of geosciences | |
| A silicified tommotiid from the lower Cambrian of Greenland | |
| Skovsted CB1 | |
| 关键词: Small Shelly Fossils; Tommotiida; eccentrothecimorph; Brachiopoda; silicification; Greenland; | |
| DOI : | |
| 来源: Czech Geological Survey | |
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【 摘 要 】
ThreespecimensofaneweccentrothecimorphtommotiidaredescribedfromtheParalleldalFormationofNorthGreenland.Thespecimensarealltubularstructurescomposedofanumberofindividualsclerites.Thescleriteswerearrangedinrings,whichfusedtoformarigidtubeduringontogeny.Thetubehasabasalaperturepresumablyallowingattachmenttoahardsubstrate.Inmorphology,bothindividualscleritesandthetubularscleritomeareremarkablysimilartospecimensofEccentrothecafromSouthAustralia.However,theGreenlandspecimensaresilicifiedandmayhavebeeneitherweaklymineralisedorcalcareousinoriginalcomposition.Inthisrespecttheydifferfromallpreviouslyknowntommotiids,considerablyexpandingtheultrastructuraldisparityoftheTommotiidaandallowingcomparisontoanewrangeofpossiblelophotrochozoanfossils.
【 授权许可】
Unknown
【 预 览 】
| Files | Size | Format | View |
|---|---|---|---|
| RO201912090783259ZK.pdf | 2992KB |  download |
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