Common calpurnus
Calpurnus verrucosus
- Usual depth1–11 m
- Water temperature23–30 °C
- Best monthsMarch, July, and August
- How commonRare
Photo credit: (c) Georgina Jones, some rights reserved (CC BY-SA) · CC BY-SA · iNaturalist
About this species
Calpurnus verrucosus, the Umbilical Egg Shell or Warty/Little Egg Cowry, is a species of sea snail, a cowry, a marine gastropod mollusk in the family Ovulidae, the cowries.
Text from the Wikipedia article “Calpurnus verrucosus”, 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: 23 records
- February: 24 records
- March: 43 records
- April: 40 records
- May: 40 records
- June: 39 records
- July: 52 records
- August: 45 records
- September: 19 records
- October: 37 records
- November: 29 records
- December: 36 records
Depth and water temperature
Depth
Mostly recorded at 1–11 m · Deepest record: 33 m
Water temperature
Recorded in surface water of 23–30 °C
Photos
(c) Greg III Espera, some rights reserved (CC BY) · CC BY · iNaturalist 
(c) Bart, some rights reserved (CC BY) · CC BY · iNaturalist 
(c) 呂一起(Lyu yi-chi), some rights reserved (CC BY) · CC BY · iNaturalist 
(c) Nicola Crockford, some rights reserved (CC BY) · CC BY · iNaturalist 
(c) TonyT, some rights reserved (CC BY) · CC BY · iNaturalist 
(c) Georgina Jones, some rights reserved (CC BY-SA) · CC BY-SA · iNaturalist
Names and classification
- English
- Common calpurnus, Little egg cowrie, Umbilical egg shell, Umbilical ovula snail, Warty egg cowrie, common calpurnus, little egg cowrie, Little Egg Cowry, Toenail Egg Cowrie, Toenail Egg Cowry, umbilical egg shell, umbilical ovula snail, warty egg cowrie
Names in 5 more languages
- German
- Fingernagel-Eischnecke
- French
- Ovule-ongle
- Japanese
- セムシウミウサギ, ボタンウミウサギ
- Thai
- หอยไข่สะดือจุ่น
- Simplified Chinese
- 玉兔螺
Other scientific names: Bulla verrucosa, Ovula perla, Radius gibbus
Similar species
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).
- 267 open-data records from 1758 to 2012.
- Species data updated October 26, 2026.
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