Finally an answer...

[kinyonga]

About 20 years ago Lynn Raw noticed some "organs" on the scales of the chamaeleo chamaeleons I owned only at that time we didn't know what they were for sure...finally I think this might be the answer!
http://www.sciencedirect.com/science/article/pii/S2314808X16301440

 

[laurie]

I am glad you have an answer, but that was a long time coming.

 

[Fireborn]

Cool

 

[kinyonga]

It was a long time...but it's not something that seems to get attention! There are lots more important (to survival) things that get studied first...and rightly so!