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Species · Crustaceans

Common pygmy woodlouse

Trichoniscus pusillus

391Records since 2000
JulyPeak month
50Counties with records

When it is recorded

Jan21
Feb17
Mar25
Apr53
May51
Jun58
Jul61
Aug19
Sep30
Oct24
Nov17
Dec1

GBIF records by month, 2000–2025 (all years combined).

Where it is recorded

#CountyNationRecordsShare
1Cambridgeshire England34
2Worcestershire England16
3Gwynedd Wales15
4Dorset England14
5Argyll and Bute Scotland13
6Pembrokeshire Wales13
7Causeway Coast and Glens Northern Ireland13
8Swansea Wales13
9Fermanagh and Omagh Northern Ireland13
10Highland Scotland12
11Powys Wales11
12Monmouthshire Wales10
13Mid and East Antrim Northern Ireland9
14Norfolk England8
15Ceredigion Wales8
195 England45 Scotland85 Wales57 Northern Ireland

Records per county (GADM level 2) and per nation; one record can count towards several areas. 50 counties in all.

About this species

Records since 2000
391
Peak month
July
Counties with records
50
Scientific name
Trichoniscus pusillus
Group
Crustaceans
NBN Atlas records since 2000
509
Conservation designations
GB Red List (2001 IUCN criteria)
Kingdom
Animalia
Phylum
Arthropoda
Class
Malacostraca
Order
Isopoda
Family
Trichoniscidae
Genus
Trichoniscus
Name with authority
Trichoniscus pusillus Brandt, 1833
Described
1833

Sources: GBIF occurrence data (CC0 / CC BY), JNCC Taxon Designations (OGL), NBN Atlas (open licences), Wikidata (CC0) · Wikidata Q2392251 · GBIF 2207872