Tetrapygus niger
A species of Tetrapygus Scientific name : Tetrapygus niger Genus : Tetrapygus
Tetrapygus niger, A species of Tetrapygus
Botanical name: Tetrapygus niger
Genus: Tetrapygus
Content
Description
Description
The oral (under) surface of the test is flattened while the aboral (upper) surface is shallowly domed. There is a small apical disc and the ambulacral areas are straight. There are up to five large primary tubercles in rows in the inter-ambulacral areas, interspersed with smaller secondary tubercles. The mouth is surrounded by a sunken subpentagonal peristome which is half as wide as the test. The primary spines are moderately long while the secondary spines are short. The colour of this sea urchin is purplish-black.
* Disclaimer: The judgment on toxicity and danger is for reference only. We DO NOT GUARANTEE any accuracy of such judgment. Therefore, you SHALL NOT rely on such judgment. It is IMPORTANT TO SEEK PROFESSIONAL ADVICE in advance when necessary.
Scientific Classification
Phylum
Echinoderms Class
Sea urchins Order
Arbacioida Family
Arbaciidae Genus
Tetrapygus Species
Tetrapygus niger 
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