SCHAUMS IS WRONG flatworms/protosomes?

[pistolpete007]

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schaums had to make a mistake on this or im going crazy

ph410 "flatworms (platyhelminthes) and proboscis worms (rhynochocoela) have no coelom whatsoever.
Pseudocoelomates include rotifera and nematoda.

4rd paragraph says coelomate bilateria soon diverged into two major branches in animal kingdom, based on differences in developing embry: deuterosomes and protosomes......Major protosome phyloa are PLATYHELMINTHES, NEMATODA, mullusca annelida, and arthropoda

IT JUST SAID PLATHYHELMINTHS DOESNT HAVE A COELOM and nematoda are pseudocoelmata?!?!?

 

[Bruinlove]

I think both statements are true. Flatworms don't have any coelom, but it is protostome.

 

[pistolpete007]

but protosme is a subsection of animals w/ coeloum ithought?

 

[Dae204]

According to Campbell's Biology (which I find pretty reliable), "The COELOMATE phyla are divided into two distinct grades: Protostomia and Deuterostomia. Mollusks, annelids, arthropods and several other phyla represent one of these grades and are collectively called protosomes." (Chapter 32 of 6th edition)

And few paragraphs before that, flatworms and round worms are labeled as acoelomates and pseudocoelomates respectively.

I think Shwaum's review is wrong about this topic? 😕