Hemicidaridae
![](/Images/godic/202501/17/Hemicidaridae_-_Asterocidaris_species3450.JPG")
![Pseudocidaris spine; Matmor Formation (Middle Jurassic) of Makhtesh Gadol, Israel.](/Images/godic/202501/17/Pseudocidaris_spine_Jurassic3450.jpg")
Hemicidaridae is a family of fossils sea urchins in the classis Echinoidea.
These epifaunal grazer-deposit feeders lived in Jurassic and Cretaceous ages (from 189.6 to 112.6 Ma).
Hemicidaridae
/ˌhemi'sidərədi:/
英汉-汉英词典
半头帕海胆科
词组 | 习惯用语
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- spermicidal adj. 杀精子的
- germicidal adj. 杀菌的；有杀菌力的
- hemispheric adj. 半球形状的；半球的
- radiochemistry n. 放射能化学
Hemicidaridae n. [古生] 半头帕海胆科
英语百科
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