Diloma zelandicum
- Usual depth0–1 m
- Water temperature12–18 °C
- Best monthsJanuary, April, and December
- How commonRare
Photo credit: (c) Saryu Mae 前 朝琉, some rights reserved (CC BY), uploaded by Saryu Mae 前 朝琉 · CC BY · iNaturalist
About this species
Diloma zelandicum is a species of sea snail, a marine gastropod mollusc in the family Trochidae, the top snails or top shells.
Text from the Wikipedia article “Diloma zelandicum”, licensed CC BY-SA 4.0. Read the article
Where and when
Where it has been recorded
Worldwide
Loading the map
Best months
Worldwide (open data)
- January: 31 records
- February: 19 records
- March: 13 records
- April: 45 records
- May: 17 records
- June: 22 records
- July: 13 records
- August: 12 records
- September: 18 records
- October: 15 records
- November: 19 records
- December: 36 records
Depth and water temperature
Depth
Mostly recorded at 0–1 m · Deepest record: 10.5 m
Water temperature
Recorded in surface water of 12–18 °C
Photos
(c) Javier, some rights reserved (CC BY), uploaded by Javier · CC BY · iNaturalist 
(c) Emily Roberts, some rights reserved (CC BY) · CC BY · iNaturalist 
(c) Saryu Mae 前 朝琉, some rights reserved (CC BY) · CC BY · iNaturalist 
(c) Emily Roberts, some rights reserved (CC BY) · CC BY · iNaturalist 
(c) Kelvin Perrie, some rights reserved (CC BY) · CC BY · iNaturalist 
(c) John Steel, some rights reserved (CC BY) · CC BY · iNaturalist 
(c) Kelvin Perrie, some rights reserved (CC BY) · CC BY · iNaturalist
Names and classification
Other scientific names: Trochus atrovirens, Trochus zelandicus
Similar species
Scorched monodontDiloma aethiops
Speckled PeriwinkleDiloma concameratum
Mudflat Top ShellDiloma subrostratum
Knobbed Top SnailDiloma bicanaliculatum
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).
- 367 open-data records from 1922 to 2003.
- Species data updated November 2, 2026.
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