Slug mites

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Slug mites

Although the FSC guide (page 8) says that the mites which run around on slugs are Riccardoella limacum, they are actually Riccardoella (Proriccardoella) oudemansi (Thor, 1932). Dave Gibbs found this paper by Zabludovskaya & Badanin which demonstrates that the mites on slugs are R. oudemansi, not R. limacum: http://mail.izan.kiev.ua/vz-pdf/2010/2/06_Zabludovska-Badanin.pdf

Dave used this ID paper to check the identity of some mites on a Tandonia budapestensis slug in his garden: http://bionames.org/references/9509117b78453fbd0f762c97873c642f

They were R. oudemansi, as expected. Annotated photo here: http://www.brc.ac.uk/psl/photo/riccardoella-oudemansi-slug-mite

 

Also note that according to Fauna Europaea, R. limacum is absent from Britain. I'm not sure how much weight to give to that - mites on snails in Britain could be either R. oudemansi, R. limacum or other species. Worth checking.

Species category: 

Good Stuff!

That's awesome!

I was looking for the A Fain paper back in 2013 as I found a few of this group on both slugs and snails during Andy's 1kmsq doodah - but failed to find it, and gave up when I figured flagellate setae would be impossible under the compound.

Looking at the Fain images.. I wonder if I was wrong and the flagellate setae of r.limacum might be visible at x600 - I'm guessing Steve's microscope grab is x400, so i'm hoping that these differences would be visible (to the naked eye) dry - however if the bothridia on r.oudesmani don't show as flagellate at x600 then its not a good character... also looks like there are setae differences on the setae on the leg segements on the flip side.

The only other thing to note is that the figure is for females - my French is non-existant - are the differences likely to apply to both sexes?

Cheers,

Matt (soon to be hoovering molluscs)

Has anyone come to a

Has anyone come to a conclusion on the UK slug mites?  I've collected some from our African Land Snails and need a bit of help with an ID...

 

Cheers

 

Richard

 

Very fascinating story, I

Very fascinating story, I rarely met this information, but you opened my eyes 192.168.l.l