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T. nepaeolicus

What is a blastoid?

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T. nepaeolicus

Can someone explain to me what a blastoid is? Britannica was absolutely useless and so I turned to here for a better explanation. Are they related to crinoids in any way?

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Ludwigia

Blastoid. It took me 10 seconds to google this. :P

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Tidgy's Dad

Or use the search function on TFF

I explained it on Saturday. 

 

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Ruger9a

Here are some sample photos

20191219_115428 (2).jpg

DSCN9361.JPG

150927303448-2.jpg

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grandpa

Love the 1st one.  Is it a Deltablastus?

 

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Ruger9a

Yes they are - Deltoblastus permicus

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Tidgy's Dad

They are lovely specimens. :wub:

You can clearly see the petaloid food-grooves. 

These are called ambulacrum and had tiny filaments that brought microscopic food up to the mouth which is the sort of star shaped bit in the centre of the top. The five holes around it are, in four cases, hydrospires, for respiration, and the biggest one is the anus. 

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Ruger9a

Thanks Tidgy's Dad.  They are in my display cabinet for my viewing pleasure:-)

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