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Even though steadily increasing, biofluorescence is a rarely documented phenomenon in vertebrates. Within
geckos, only six species have been shown to produce fluorescence and only one case of dermal fluorescence has
been reported. Here, we report on the discovery of dermal fluorescence in the Dune Sand Gecko (Stenodactylus
doriae), the Eastern Sand Gecko (S. leptocosymbotes), and the Arabian Web-footed Sand Gecko (Trigonodactylus
arabicus), three closely-related, nocturnal, desert-adapted Arabian geckos. We show that there are interspecific
differences in fluorescent regions which might be linked to the habitat preference and behaviour of each species.
Our results are in agreement with prior hypotheses suggesting that desert-adapted geckos might use dermal
biofluorescence for conspecific signalling. With the present work, we expand the current knowledge on skin
fluorescence in reptiles and provide new insights on fluorescence of desert-adapted geckos.
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© 2024 The Authors. This is an open access article under the CC BY-NC license (http://creativecommons.org/licenses/by nc/4.0/)