There is an ID section, it is also for sexing plecos. Have a good scroll back through there and you should find heaps of good piccies.
Hypans if not mature are one of the hardest sorts to sex.
At least ancistrus bristlenoses have the decency to grow bristles if they are males.
Not your L333 sp. but still a Hypancistrus non the same, male and female characteristics are the same with this pair of L262 as should be with your L333
It is something we can consider for the profiles but it isn't something that can be sorted out immediately as we have a few things on here to do first.