Terminology: "Classified in" or "Classified as" I'm working on a paper where I find that it is easier to use the phrase '... classified in ...' rather than '... classified as ...'. Is this a correct usage of the word 'classified'?
For example, would it be correct to say "This individual is classified in the same group as that individual while my dog falls into a different group" or would I need to say "This individual is classified as human. That individual is also classified as human. In this regard, they come from the same group while my dog is in a separate, mutually exclusive, group."
NOTE: Please do not try to rephrase my example as an answer. This is to illustrate the use of 'classified in' and 'classified as' only.
 A: "Classified in" doesn't seem very idiomatic to me, but "classified into" does: "This individual is classified into the same group as that individual." Saying that "A is classified in B" makes it sound like B is a place where A is classified rather than a category it is classified into.
A: My preference would be almost exclusively to use as for any language about group membership rather than in, within, or into. The latter reminds me of urn models, and treats the group construct as an actual physical thing into which people can actually be placed. On the other hand, as denotes a label assignment and things or people with that label are somehow similar or equivalent. In fact the etymology of as comes from old English meaning "similarly". 
This is an important distinction, because falling into a group doesn't necessarily convey that individuals within that group are in any way more similar than other individuals in other groups. 
For instance, if you're in a rock band, you probably play a different instrument and have different skills than other members of your band. But, you would be classified as a bass guitarist because anyone else who is a bass guitarist shares more in common with you than others in their respective bands.
A: I would say:

This individual is classified with the same group as that individual,
  while my dog (falls into) is classified with a different group

"classified as" is used to describe the quality of a matter or person (in a formal, technical or scientific way), for example "this chemical is classified as toxic/as a weapon" or, maybe more formal, "a person is classified as (considered as) sick/a disease carrier"
"classified in" sounds strange, whereas, to me, "classified into" demands plural subject and object: " they are classified into three groups"
somebody correct me if I'm wrong
