Coryman
Fish Crazy
Hi Folks,
I think it has reached the time when I need to clarify a few things regarding the so called Cory groups.
However, firstly just to straighten out one or two things. Copyright is something that the majority of people using the internet totally ignore, whether through pure ignorance or plain bloodymindedness. Frank knows I have had several articles ripped of from my site and was looking after my back in this instance. The fact is that every written word or picture taken is covered by international copyright law. Enforcing it is a totally different matter.
The other thing I want to make very clear is I do not expect everyCory enthusiast to be a member of Corydorasworld and by the same token I do not think that every Cory enthusiast has the right to expect all Cory information on CW should be free and there have been a couple that have actually demanded that it be so, and to be perfectly honest there have been just two, these I gave the titles of a couple of good Cory books that I know of.
OK the Cory groups.
Nijssen & Isbrücker in 1967 formulated Cory groups based on distribution, but it was not long before they realised that a system of grouping by geographical location was unworkable and was therefore disregarded.
The five groups were acutus, aeneus, barbatus, elegans and punctatus. As I already stated these were based on location and nothing else. The terms I use, 'aeneus group' and 'elegans group' are based on body shape and form alone in the 'elegans group' and colour and body shape in the 'aeneus group'. In the latter it is the similarity in colour pattern which causes the most confusion and the reason that are all called C. aeneus, however these group of fish are widely distributed throughout the South American continent and a number of them are considered by many (me included) to be distinct species in their own right.
It is relatively easy to determine species that would fall into the so called 'elegans' group just by their body shape alone, there are 11 species, 6 C-number species and 5 CW-number species, (22). All of these has a very similar mirrored, dorsal and ventral profile shape.
The 'elegans group' may very well be the next group of Corys to have the genus name changed, but that's not something that I have any control over, that's a scientists job.
Ian
I think it has reached the time when I need to clarify a few things regarding the so called Cory groups.
However, firstly just to straighten out one or two things. Copyright is something that the majority of people using the internet totally ignore, whether through pure ignorance or plain bloodymindedness. Frank knows I have had several articles ripped of from my site and was looking after my back in this instance. The fact is that every written word or picture taken is covered by international copyright law. Enforcing it is a totally different matter.
The other thing I want to make very clear is I do not expect everyCory enthusiast to be a member of Corydorasworld and by the same token I do not think that every Cory enthusiast has the right to expect all Cory information on CW should be free and there have been a couple that have actually demanded that it be so, and to be perfectly honest there have been just two, these I gave the titles of a couple of good Cory books that I know of.
OK the Cory groups.
Nijssen & Isbrücker in 1967 formulated Cory groups based on distribution, but it was not long before they realised that a system of grouping by geographical location was unworkable and was therefore disregarded.
The five groups were acutus, aeneus, barbatus, elegans and punctatus. As I already stated these were based on location and nothing else. The terms I use, 'aeneus group' and 'elegans group' are based on body shape and form alone in the 'elegans group' and colour and body shape in the 'aeneus group'. In the latter it is the similarity in colour pattern which causes the most confusion and the reason that are all called C. aeneus, however these group of fish are widely distributed throughout the South American continent and a number of them are considered by many (me included) to be distinct species in their own right.
It is relatively easy to determine species that would fall into the so called 'elegans' group just by their body shape alone, there are 11 species, 6 C-number species and 5 CW-number species, (22). All of these has a very similar mirrored, dorsal and ventral profile shape.
The 'elegans group' may very well be the next group of Corys to have the genus name changed, but that's not something that I have any control over, that's a scientists job.
Ian