We show here that changing the classical white-light illumination for a deep-blue or UV light source has several advantages. The "dirt removal" combined with the "light conveyance" phenomenon speeds up and eases significantly the visualisation of identification markers. It may be possible that in certain cases this approach would avoid the need for staining, or even the use of immunological approaches that are often necessary for revealing certain details. And as even the tiniest of hairs "light up" it may be that scanning electron microscopy could prove sometimes unnecessary for identification.
"Dirt" is generally not a problem when examining terrestrial animals, but the "light conveyance phenomenon" is also a great help for revealing fine details on the bodies of land invertebrates (data not shown).
An additional advantage of both phenomena is that they will facilitate the scientific drawing process. For instance, the picture of Figure 1B (right panel) can very easily be transformed into a simple line drawing with Photoshop or an equivalent program.
To the best of our knowledge both the "dirt removal" and the "light conveyance" phenomena were never reported before. Both are extremely convenient when studying invertebrates as identification markers are much easier visualized with only a change of light colour. The same "light conveyance" phenomenon facilitates also the visualization of small organisms that under normal light regimes remain invisible. We cannot exclude that what we call "light conveyance phenomenon" is in reality the fluorescence of a resistant fluor that is very commonly found in all groups we investigated thus far, and which has a very large excitation and emission spectrum. Although we cannot be sure about the physical explanation of the phenomenon, its usefulness for the taxonomist remains without doubt.
The use of blue light-elicited autofluorescence in medicine started only a few years ago and was found to be very helpful for distinguishing between normal and abnormal or cancerous tissues [6–9]. Autofluorescence depends on the presence of endogenous fluors that are of changing type and which differ in concentrations between various tissues [6, 8]. These differences allow therefore visualizing tissue morphological or physiological changes or tissue invasion . By these means the MD can repair or remove the "abnormal" tissues while leaving the healthy tissues unharmed.
In a few reports, autofluorescence is also used to distinguish between closely resembling spores [10–12] or pollen . It can also help by distinguishing between live and dead cells  or by allowing the detection of insect larvae which contaminate food .
In our screens we often detect specific fluorescence patterns on the animals' bodies and these may provide new identification-markers for correct or if not, easier identification.
These additional fluorescence patterns may allow distinction between similar species  or lead to the identification of thus far invisible sexual dimorphism or patterns that change during development.
These patterns are presently ignored by the animal taxonomist, but should not be excluded as they may represent additional valid identification markers
In conclusion, we believe that inspecting specimens with different light colours, most importantly with UV or deep blue light, will greatly facilitate the identification of specimens. Moreover, this approach has the potential to detect (sub)species, dimorphisms or developmental patterns, which under normal light regimes remain completely invisible and may be still unknown to science.