I think one of the differences of Chiloglanis Vs euchilichthys is the structure of the lower jaw.
luckily it's very well visible on these really excellent pictures.
this fish has a narrow lower jaw with grouped long pointed teeth
this mouth structure points at a fairly carnivorous fish. with lower teeth like that it's more than capable of peeling crustaceans or pulling snails from their shell.
to me the structure of the sucker reminds me of -for example- the Vampire Pleco.
now this fish has a wide band of small teeth on the lower jaw; it's a very different mouth.
now this fish is likely to be much more of an omnivore or even an aufwuchsfeeder. it has the apparatus of scraping a wide swap of algae with inverts in it.
this fish is more like Chaetostoma. wich is a grazer.
one of them is Chiloglanis, the other Euchilichthys.
my money's on the carnivorous one being Chiloglanis, but I'm not a 100% sure.
. Only in Kobayagawas The World of Catfishes at page 12 there is photo of leopardina which doesn't have so long dorsal fin. But it seems that the fish at that photo is still juvenile. And I really think that I have three more of that same species
. I bought them as rebeli which they are not but the wholesaler has got them from Cameroon and that was the closest looking syno he could find. They are still pretty small, about 6-8cm but they look very much same with the bigger one. So I think the yellow one is from Cameroon too. I will post some photos when I get them.
), the dark one you have shown pictures of is from Congo...so you have not showed a shot of the grey one from Cameroon , is this correct?
black one