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I spotted this guy in Switzerland. It's clearly an Opilione (Harvestman), but I really know nearly enough about this diverse group to be able to identify the species.

Unidentified Opilione

Sorry, I didn't think to place any reference near it for scale. Can anyone tell me the species or at least the genus? (Bonus points if anyone can guess what it's feeding on)

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you smashed the poor guy? – Devashish Das Jul 21 '14 at 5:40
@DevashishDas No of course not; I didn't harm either one. I saw him, took the photo, then moved on. – p.s.w.g Jul 21 '14 at 5:43
Sorry, i was just kidding. Anyway, is this is the one?… – Devashish Das Jul 21 '14 at 5:46
It could be. The coloration is similar. Can you find another image that more shows back a bit more clearly and cite the species? – p.s.w.g Jul 21 '14 at 5:49
up vote 3 down vote accepted

It is probably Daddy Longlegs (Leiobunum vittatum)

this invert color image show the resemblance.

enter image description here


Might be eating a cockroach:



It might be Mitopus morio(modern harvestman)

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Thanks for the response. I'm a little skeptical of this identification though. First, in my image, there is a dark stripe down the back behind the eyes, but in yours, the body appears almost entirely dark with light fringes on the side and light joints. Second, several sources claim the distribution of Leiobunum vittatum is limited to North America, but my specimen was from Switzerland. I'll leave the question open for now, but I'll keep looking into it. – p.s.w.g Jul 21 '14 at 6:28
@p.s.w.g: I think you are right. But I am pretty sure genus is correct. Look for a species which have two parallel sets of dots on the back in that genus. – Devashish Das Jul 21 '14 at 6:35
Age and sex may be a factor for body color. – Devashish Das Jul 21 '14 at 7:45
Yes, I'm pretty sure it's a Mitopus morio. The coloration and patterning is correct, as well as the distribution. – p.s.w.g Jul 21 '14 at 13:47

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