Im a lurker here for a few years now....and just recently got the chance to add a corruscans to my collection of tsns.
Being so rare to find, I feel the responsibility to share some of the observations and learnings I have to the community....
The corruscans looks like a fasciatum, long nose profile from the top. When side by side with a punctifer, viewed from above, I find the nose longer, while the punctifer's look wider and short much like reticulatum.
I dont have a fasciatum nor a reticulatum, so Im comparing to fishing pictures and videos from their respective countries.
I only have 3 punctifers, a corruscans and a tigrinum.
They're exported from Argentina and can cost quite a bit.
Behaviorally, they like to school with my punctifers, Im assuming since they're from the same fasciatum clade. Staying on the sides of the tank rather than boldly staying in the center. In contrast my tigrinum who boldly stay in the center area of the tank. Behaviorally, I think they enjoy being huddled together.