Straw sundial
Heliacus stramineus
- Usual depth22 m
- Water temperature23–29 °C
- Best monthsJuly
- How commonRare
Where and when
Where it has been recorded
Worldwide
Loading the map
Best months
Worldwide (open data)
- January: 1 records
- February: 1 records
- March: 0 records
- April: 0 records
- May: 1 records
- June: 1 records
- July: 4 records
- August: 0 records
- September: 0 records
- October: 1 records
- November: 2 records
- December: 0 records
Depth and water temperature
Depth
Mostly recorded at 22 m · Deepest record: 22 m
Water temperature
Recorded in surface water of 23–29 °C
Names and classification
- English
- Straw sundial, straw sundial
Names in 2 more languages
- German
- Stroh-Sonnenuhr, Stroh-Sonnenuhrschnecke
- Japanese
- ワライロナワメグルマ
Other scientific names: Architectonica gothica, Grandeliacus mortensenae, Heliacus (Grandeliacus) stramineus, Solarium (Torinia) stramineum, Solarium fulvum, Solarium stramineus, Trochus stramineus
Similar species
Variegated sundialHeliacus variegatus
channeled sundialHeliacus infundibuliformis
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).
- 42 open-data records from 1791 to 1999.
- Species data updated November 3, 2026.
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