Which arachnids (except scorpions) glow under UV light?

[Gogyeng]

Scorpions display cuticular fluorescence due to the hyialin present in their exoskeleton. Are there any other similar cases amongst arachnida?

 

[chanda]

Some of the harvestmen will fluoresce under black light, as do some spiders. (Also a number of non-arachnid arthropods, including millipedes and assorted insects.)

See for example: http://www.shaman-australis.com/for...y-the-secret-world-of-fluorescent-arthropods/ and https://www.nickybay.com/2016/02/alien-transformations-under-ultraviolet.html

 

[Gogyeng]

Many spiders fluoresce under UV light, one wonders if it has to do with mimetism, specially with crab spiders sitting on flowers
Crab spiders (Tmarus, Tmarini) legs and cephalotoraz shine under UV light.
Bird dong spiders (Pasilobus),
The orb weaver, Paraplectana,

and other arthropoda
Diplopoda millipides,

https://royalsocietypublishing.org/doi/full/10.1098/rsbl.2007.0016
https://www.wired.com/2013/11/arthropods-are-having-a-secret-rave/