Sentence Correction (SC) | Re: On a glacier in the high Himalayas, a Japanese zoologist has found a s

Good question, ziyuen. And yes, the commas are completely fine. The phrase inside the commas is just setting up a comparison with the midge, and the commas help separate it from the rest of the sentence.

Consider thefollowing:

Unlike any other known insect, midges live in glaciers.
Midges, unlike any other known insect, live in glaciers.

No problem with either of these, right? The comparison is correct, and in that second sentence, you clearly need the commas for separation. (C) is similar,