Flat Top Shell

Steromphala umbilicalis

4,533Records since 2000

SeptemberPeak month

43Counties with records

When it is recorded

Jan26

Feb60

Mar130

Apr425

May640

Jun604

Jul605

Aug531

Sep814

Oct408

Nov90

Dec110

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

#	County	Nation	Records
1	Pembrokeshire	Wales	374
2	Ceredigion	Wales	302
3	Cornwall	England	279
4	Devon	England	233
5	Ards and North Down	Northern Ireland	169
6	Gwynedd	Wales	126
7	Plymouth	England	95
8	Isles of Scilly	England	90
9	Highland	Scotland	80
10	Dorset	England	78
11	Argyll and Bute	Scotland	64
12	North Ayrshire	Scotland	60
13	Dumfries and Galloway	Scotland	55
14	Swansea	Wales	55
15	Newry, Mourne and Down	Northern Ireland	51

802 England319 Scotland1,422 Wales407 Northern Ireland

Records per county (GADM level 2) and per nation; one record can count towards several areas. 43 counties in all.

Records since 2000: 4,533
Peak month: September
Counties with records: 43
Scientific name: Steromphala umbilicalis
Group: Molluscs
NBN Atlas records since 2000: 4,029
Most recorded in: Pembrokeshire, Ceredigion, Cornwall, Devon, Ards and North Down, Gwynedd, Plymouth, Isles of Scilly, Highland, Dorset, Argyll and Bute, North Ayrshire +3
Conservation designations: GB Red List (2001 IUCN criteria)
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Order: Trochida
Family: Trochidae
Genus: Steromphala
Name with authority: Steromphala umbilicalis (da Costa, 1778)
Described: 1778
Contributing datasets: 63