Are there still any Corydoras species? I see that the splitters have been hard at work and sliced'n'diced the genus into a bunch of new smaller genera. Gastrodermus...Hoplisoma...Osteogaster...likely others...is Corydoras even still a legitimate genus anymore?
Just when you thought it was safe to go into the aquarium store...dang eggheads...
They were originally proposed and/or classified as separate genera, then lumped back together into Corydoras for a good while- though the 'subtypes'/'lineages'/clades' represented what were the former genera, and were still oftentimes mentioned as such.
The Corydoradinae has full right to be broken down into different genera IMO. The change is/was long overdue from a taxonomic standpoint. From a hobbyist standpoint, it seems unnecessary, but it does give more clarification on species hybridisation potential and general care and whatnot- something that was much more difficult to clarify to new keepers with all the talk of lineage numbers and the like.
Lineage 1, the long-snouted Corydoras, are now the true basal genus Corydoras.
Off the top of my head there is at least 200+ corydoras species and 700+ documented pleco species. I've been told there's probably 1000's of sp of ancistrus (bristlenose) but they're all "ugly" or similar enough looking that no one bothers lol.
Likely around ~700-1000+ total species of Corydoradinae, and anywhere from ~700-1200 estimated total species of Hypostominae, depending on who you ask. Though the numbers are declining due to extensive habitat destruction. The numbers are all estimates based on multiple factors.
There are about 150-250 potential species of Ancistrus, as opposed to 1000, with ~100 likely distinct species known to the hobby.
Generally, a lack of funding and availability of organised research as well as ready access to specimens is the main deterrent in describing most of the individual species of undescribed fish out there, not necessarily their ornamental worth or general 'attractiveness', though those factors certainly help somewhat.