Subphylum

What are the distinguishing characteristics of subphylum Crustacea and Hexapoda? If you have a list of many different subphylum that would be great.

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... PHYLUM - which is an altogether different kettle of fish (ha ha!). Actually whales are not only in the same Phylum (Chordata), but also the same Subphylum (Vertebrata)... If the whales descend from a land animal (as Babinski says) like Pakicetus , you can begin to see the difficulties... Imagine ...

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... crustacea, implying that crustacea is a class. Wikipedia states that the shrimp belongs in the class malocostraca. It says that crustacea is a subphylum and not an class. These two sources of information seem to be contradicting each other. The book also states the grey wolf as being Canis ...

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Is it a member of the subphylum vertebra? yes

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If it's a fish then it is a chordate. Is it a member of the subphylum vertebra? Is it a non-vertebrate chordate?

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