Old-woman dosinia

About this species

Dosinia anus, commonly named the ringed dosinia, coarse dosinia, coarse biscuit shell and tuangi-haruru, in the Māori language, is a species of saltwater clam, a marine bivalve mollusc in the family Veneridae, the venus clams. The species is common to both of the main islands of New Zealand, where it is the largest and heaviest species in the genus, occasionally exceeding 80 mm in diameter. It buries itself in clean fine sandy substrata, sub-tidally down to 15 m deep.

Text from the Wikipedia article “Dosinia anus”, 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: 52 records
February: 74 records
March: 65 records
April: 110 records
May: 62 records
June: 58 records
July: 76 records
August: 65 records
September: 71 records
October: 68 records
November: 48 records
December: 65 records

Depth and water temperature

Depth

Mostly recorded at 1–10 m · Deepest record: 137 m

0–10 m: 18 records
10–20 m: 0 records
20–30 m: 0 records
30–40 m: 0 records
40–50 m: 0 records
50–60 m: 0 records
60–70 m: 0 records
70–80 m: 0 records
80–90 m: 0 records
90–100 m: 0 records
100–110 m: 0 records
110+ m: 2 records

Water temperature

Recorded in surface water of 13–18 °C

12–14 °C: 1 records
14–16 °C: 16 records
16–18 °C: 16 records

Photos

(c) Saryu Mae 前朝琉, some rights reserved (CC BY), uploaded by Saryu Mae 前朝琉 · CC BY · iNaturalist
(c) Arnim Littek, some rights reserved (CC BY), uploaded by Arnim Littek · CC BY · iNaturalist
(c) Arnim Littek, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Debra Baker, some rights reserved (CC BY) · CC BY · iNaturalist
(c) John Barkla, some rights reserved (CC BY) · CC BY · iNaturalist
(c) John Barkla, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Arnim Littek, some rights reserved (CC BY) · CC BY · iNaturalist

Names and classification

English: Old-woman dosinia, old-woman dosinia

Names in 1 more languages

German: Greisinnenmuschel

Other scientific names: Artemis anus, Cytherea (Artemis) anus, Cytherea anus, Dosinia (Austrodosinia) anus, Dosinia (Austrodosinia) horrida, Dosinia horrida

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).
562 open-data records from 1930 to 2013.
Species data updated November 2, 2026.