Spurred starshell

About this species

Astralium calcar is a species of sea snail, a marine gastropod mollusk in the family Turbinidae, the turban snails.

Text from the Wikipedia article “Astralium calcar”, 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: 23 records
February: 14 records
March: 10 records
April: 9 records
May: 9 records
June: 15 records
July: 14 records
August: 7 records
September: 8 records
October: 7 records
November: 17 records
December: 8 records

Depth and water temperature

Depth

Mostly recorded at 0–27 m · Deepest record: 26.8 m

0–10 m: 11 records
10–20 m: 1 records
20–30 m: 2 records

Water temperature

Recorded in surface water of 24–30 °C

22–24 °C: 2 records
24–26 °C: 26 records
26–28 °C: 39 records
28–30 °C: 71 records

Photos

(c) H. Zell, some rights reserved (CC BY-SA) · CC BY-SA · iNaturalist
(c) Shellnut, some rights reserved (CC BY-SA) · CC BY-SA · iNaturalist
(c) Richard Parker, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Tom Riggle, some rights reserved (CC BY-SA) · CC BY-SA · iNaturalist
(c) portioid, some rights reserved (CC BY) · CC BY · iNaturalist

Names and classification

English: Spurred starshell, Spurred starsnail, spurred starshell, spurred starsnail

Names in 3 more languages

German: Sternschnecke
Japanese: クルイウラウズ
Korean: 작은바퀴고둥

Other scientific names: Astraea calcar, Calcar sporio, Turbo calcar

Similar species

Astralium rhodostomum
blue-mouthed turban
Astralium stellare

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).
183 open-data records from 1758 to 2009.
Species data updated October 26, 2026.