Brown Purse Shell
Isognomon perna
- Usual depth13 m
- Water temperature20–30 °C
- Best monthsJanuary, February, and July
- How commonRare
About this species
Isognomon perna, the brown purse shell or rayed tree oyster, is a bivalve in the family Isognomonidae common in the Indo-Pacific including Hawaii.
Text from the Wikipedia article “Isognomon perna”, 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: 12 records
- February: 12 records
- March: 7 records
- April: 6 records
- May: 6 records
- June: 9 records
- July: 11 records
- August: 9 records
- September: 1 records
- October: 8 records
- November: 3 records
- December: 6 records
Depth and water temperature
Depth
Mostly recorded at 13 m · Deepest record: 13 m
Water temperature
Recorded in surface water of 20–30 °C
Names and classification
- English
- Brown Purse Shell, Rayed Tree Oyster
Names in 2 more languages
- Japanese
- カイシアオリ
- Simplified Chinese
- 花紋障泥蛤
Other scientific names: Isognomon roberti, Isognomon sulcatum, Isogonum marsupiale, Melina pernaeformis, Ostrea perna, Perna costellata, Perna eremita, Perna limoides, Perna linnaei, Perna marsupium, Perna samoensis, Perna sulcata
Similar species
- Round Toothed Oyster
Isognomon ephippium
- Elongate Toothed Oyster
Isognomon isognomum
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).
- 309 open-data records from 1767 to 2021.
Log what you see on your next dive
The free DiveHive diver app keeps your logbook with every sighting and shows what lives at the site you dive next.