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#4291 · 🕷️ spiders & kin

Saddleback Harvestman

Mitopus morio

🕷️ Spiders & kin 📍 in the Netherlands
Saddleback Harvestman, photo 1 of 10
1/10 © Pascal Dubois · CC BY-NC 4.0

what is it?

Mitopus morio is a species of harvestman. It occurs in North America, Europe and Asia. It has been observed to walk using its first, third, and fourth sets of legs, using the unusually long second pair of legs to feel in front of it and probe its environment.

base stats

  • NL sightings 15iNaturalist, research grade
  • worldwide 8,582iNaturalist observations

Bars compare against all animals on log scales: up to 300,000 Dutch and 600,000 worldwide sightings (the most-seen species), 150 t (blue whale), 30 m and 400 years (Greenland shark).

fun facts

  • Spotted 15 times in the Netherlands on iNaturalist.
  • 8,582 observations worldwide on iNaturalist.
  • Scientifically named by Johan Christian Fabricius in 1779 (247 years ago).

fact sheet

English
Saddleback Harvestman
scientific name
Mitopus morio
class
Arachnida
order
Opiliones
family
Phalangiidae
sightings in NL
15
sightings in Europe
5,353
sightings worldwide
8,582
GBIF records in NL
871
weight
—
length
—
lifespan
—
named
1779 by Johan Christian Fabricius

relatives· Phalangiidae

Sources: iNaturalist taxon 324310, Wikidata Q2123386, GBIF 4553358, Wikipedia (EN), Wikipedia (NL). Intro text from Wikipedia (CC BY-SA 4.0).Updated 2026-10-24.

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