Corydoras duplicareus is the similar species. To tell them apart, look at the pectoral fin spines. If they are serrated, you have Corydoras(ln9) duplicareus . If they are smooth on their edge, then you have Corydoras(ln9) adolfoi .

Here's an example of what to look for:

Cheers, Eric
https ...

Many shipments contain contaminants. Most of us consider them lucky finds. These two spp come from the same river and can be very difficult to tell apart, so I would not be too hard on the seller.
-Shane


What two especies are these, then? Adolfoi, and....? If you know what the other fish, I'd ...

Jools wrote: 29 Jan 2021, 14:03 Looks a bit like

Corydoras(ln9) duplicareus

.

Jools

I'm going to be super sad if that is the case. The seller came greatly recommended.

Hello All, I'm new here. I've been keeping tropical fish for about 2 years.
Anyway, I bought a group of c.Adolfoi online. I received them yesterday. I noticed a darker one, which the seller assured me was different because he was stressed and miffed by the journey, and that his colours would settle ...