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Species · Worms (annelids)

Great snail-leech

Glossiphonia complanata

1,516Records since 2000
SeptemberPeak month
62Counties with records

When it is recorded

Jan1
Feb6
Mar141
Apr259
May154
Jun70
Jul67
Aug70
Sep377
Oct248
Nov97
Dec3

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

Where it is recorded

#CountyNationRecordsShare
1Gwynedd Wales171
2Pembrokeshire Wales118
3Powys Wales115
4Isle of Anglesey Wales112
5Carmarthenshire Wales89
6Monmouthshire Wales80
7Wrexham Wales59
8Denbighshire Wales54
9Worcestershire England50
10Ceredigion Wales44
11Swansea Wales29
12Conwy Wales27
13Aberdeenshire Scotland18
14Cambridgeshire England16
15Herefordshire, County of England16
173 England110 Scotland1,183 Wales

Records per county (GADM level 2) and per nation; one record can count towards several areas. 62 counties in all.

About this species

Records since 2000
1,516
Peak month
September
Counties with records
62
Scientific name
Glossiphonia complanata
Group
Worms (annelids)
NBN Atlas records since 2000
1,709
Kingdom
Animalia
Phylum
Annelida
Class
Clitellata
Order
Rhynchobdellida
Family
Glossiphoniidae
Genus
Glossiphonia
Name with authority
Glossiphonia complanata (Linnaeus, 1758)
Described
1758
Contributing datasets
21

Sources: GBIF occurrence data (CC0 / CC BY), JNCC Taxon Designations (OGL), NBN Atlas (open licences), Wikidata (CC0) · Wikidata Q1548964 · GBIF 2307956