Cidaroida (Fossil Sea Urchin) Ring
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Cidaroida (Fossil Sea Urchin) Ring
3D
Published 2015-01-19T21:48:10+00:00
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Description
Cidaroida is an order of primitive sea urchins, the only living order of the subclass Perischoechinoidea. All other orders of this subclass, which were even more primitive than the living forms, became extinct during the Mesozoic.
Their primary spines are much more widely separated than in other sea urchins, and they have no gills. Other primitive features include relatively simple plates in the test, and the ambulacral plates continuing as a series across the membrane that surrounds the mouth.
Printing Details
Printed at 0.20mm layer height, with 10% infill. This took 27 minutes and used 4g of filament.
Technical Information
发表的日期 | 19/01/2015 |
让时间去下载 | 27 - 53 分钟 |
材料数量 | 4 g |
尺寸大小 | 35 x 40 x 17 mm |
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