flatworms!!

[wall1two]

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are they protostomes?

they don't have a coelom so i thought they couldn't be classified into proto are deut. yet i see they are classified at protostomes here and there. also do they have a hydrostatic skeleton or is that ONLY nematroda?

 

[Kahr]

Well, the traditional view places them under protostomia, while the molecular view breaks down protostomes into two sub groups, where they fall under lophotrochozoans. So take your pick, thought I doubt the latter will show up on the DAT.

Regarding hydrostatic skeletons: cnidarians, rotifers, annelids, flatworms, and nematodes.

Source: Campbell's bio.