Southern Pill Woodlouse - Armadillidium depressum


Armadillidium depressum is a dark grey to black species and may reach a length of 20 millimetres. It is very similar to Armadillidium vulgare (which may reach 18 millimetres). Both species are capable of rolling into a ball when disturbed but Armadillidium depressum can be distinguished because it leaves a gap when enrolled, instead of completely enclosing like Armadillidium vulgare. Another distinguishing feature is that its pleon curve outwards, causing a splayed appearance.

Identification difficulty

Found under stones and logs, also in old buildings etc.

When to see it

All year round.

Life History

Feeds on dead plant matter, and lives for 3 years.

UK Status

Mainly recorded in southwest Britain, near the English channel, but small populations also occur elsewhere throughout England.

VC55 Status

Rare or under recorded in Leicestershire and Rutland.

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Leicestershire & Rutland Map


Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

UK Map