DiscoverSpeciesOther invertebrates
Mutilated Keyhole Sand Dollar
Echinodiscus truncatus
- Usual depth8–33 m
- Water temperature24–30 °C
- Best monthsJanuary, June, and July
- How commonRare
Photo credit: (c) Ria Tan, some rights reserved (CC BY-SA) · CC BY-SA · iNaturalist
Where and when
Where it has been recorded
Worldwide
Loading the map
Best months
Worldwide (open data)
- January: 3 records
- February: 0 records
- March: 0 records
- April: 1 records
- May: 2 records
- June: 4 records
- July: 3 records
- August: 3 records
- September: 3 records
- October: 1 records
- November: 0 records
- December: 0 records
Depth and water temperature
Depth
Mostly recorded at 8–33 m · Deepest record: 39 m
Water temperature
Recorded in surface water of 24–30 °C
Photos
(c) Ria Tan, some rights reserved (CC BY-SA) · CC BY-SA · iNaturalist 
(c) Jason Alexander, some rights reserved (CC BY) · CC BY · iNaturalist
Names and classification
- English
- Mutilated Keyhole Sand Dollar
Other scientific names: Amphiope doderleini, Amphiope döderleini, Amphiope doederleini, Lobophora truncata
Similar species
Eared Keyhole Sand DollarSculpsitechinus auritus
- Slender Keyhole Sand Dollar
Sculpsitechinus tenuissimus
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.
- Conservation status as published by GBIF (IUCN Red List).
- 18 open-data records from 1965 to 2003.
- Species data updated November 2, 2026.
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