Are There Examples of New Species with Minimal Changes in Appearance?

[Alex_Sanders]

Is there any new species defined by taxonomy (unable to cross-breed, therefore a new species) that has very little change in appearances comparing to the "original species" it deviate from?

For instance, a mosquito separated from the original horde long enough, or due to genetic mutation, which made them impossible to breed with the original horde, but still looks quite the same to the original ones? I hope you got the over all idea.

 

[baywax]

Here's one... its not that new since it was discovered in 1979...

http://ijs.sgmjournals.org/cgi/reprint/29/2/102.pdf

Just google this "new species by separation" and you'll have a fair gamut of research to do.

 

[Ygggdrasil]

If you count viruses as showing speciation events, then there are many examples of new virus emergence. For example, HIV is a relatively new species of virus.