
Montfortia subemarginata
- Usual depth0 m
- Water temperature14–30 °C
- Best monthsJanuary, March, and April
- How commonRare
Photo credit: (c) Manuel CABALLER, some rights reserved (CC BY) · CC BY · iNaturalist
About this species
Montfortia subemarginata, common name the emarginate limpet, is a species of sea snail, a marine gastropod mollusk in the family Fissurellidae, the keyhole limpets and slit limpets.
Text from the Wikipedia article “Montfortia subemarginata”, licensed CC BY-SA 4.0. Read the article
Where and when
Where it has been recorded
Worldwide
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Best months
Worldwide (open data)
- January: 16 records
- February: 5 records
- March: 18 records
- April: 20 records
- May: 6 records
- June: 6 records
- July: 11 records
- August: 8 records
- September: 12 records
- October: 8 records
- November: 6 records
- December: 8 records
Depth and water temperature
Depth
Mostly recorded at 0 m · Deepest record: 0 m
Water temperature
Recorded in surface water of 14–30 °C
Names and classification
Other scientific names: Emarginula australis, Emarginula subemarginata, Hemitoma subemarginata
Similar species

black keyhole limpetAmblychilepas nigrita
Latticed Keyhole LimpetDiodora lineata
Notched False LimpetEmarginula candida
Cap-shaped False LimpetMontfortula rugosa
Sources and credits
Names and taxonomy: WoRMS (CC BY 4.0) and the GBIF Backbone (CC BY 4.0). Photos: iNaturalist observers, each under the licence shown (CC0, CC BY or CC BY-SA).
- Depth, temperature, months and maps: records from OBIS and GBIF under CC0 or CC BY.
- Descriptions: Wikipedia, licensed CC BY-SA, each linked to its article.
- Conservation status as published by GBIF (IUCN Red List).
- 168 open-data records from 1942 to 2014.
- Species data updated November 4, 2026.
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