Oval Trough Shell

About this species

Cyclomactra ovata is a species of marine bivalve in the family Mactridae. It is endemic to New Zealand.

Text from the Wikipedia article “Cyclomactra ovata”, 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: 15 records
February: 15 records
March: 12 records
April: 12 records
May: 8 records
June: 7 records
July: 11 records
August: 11 records
September: 19 records
October: 10 records
November: 12 records
December: 22 records

Depth and water temperature

Depth

Mostly recorded at 0–4 m · Deepest record: 15 m

0–10 m: 10 records
10–20 m: 1 records

Water temperature

Recorded in surface water of 13–18 °C

12–14 °C: 5 records
14–16 °C: 3 records
16–18 °C: 12 records

Photos

(c) Lisa Bennett, some rights reserved (CC BY), uploaded by Lisa Bennett · CC BY · iNaturalist
(c) Javier, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Javier, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Shaun, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Arnim Littek, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Shaun, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Chris Ecroyd, some rights reserved (CC BY) · CC BY · iNaturalist

Names and classification

English: Oval Trough Shell

Other scientific names: Mactra deluta, Mactra inflata, Mactra lavata, Spisula ovata, Standella aequalis, Standella inflata

Similar species

Reddish Mactra
Austromactra rufescens
Diamond Clam
Crassula aequilatera
Contrary Mactra
Austromactra contraria
Agate Trough Shell
Mactra achatina
Mactra maculata
Mactrotoma angulifera

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).
218 open-data records from 1923 to 2020.
Species data updated November 1, 2026.