Robust shell

About this species

Littoraria undulata, common name the robust shell, is a species of sea snail, a marine gastropod mollusk in the family Littorinidae, the winkles or periwinkles.

Text from the Wikipedia article “Littoraria undulata”, 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: 27 records
February: 24 records
March: 19 records
April: 15 records
May: 23 records
June: 31 records
July: 64 records
August: 15 records
September: 20 records
October: 15 records
November: 24 records
December: 20 records

Depth and water temperature

Depth

Mostly recorded at 0–7 m · Deepest record: 10 m

0–10 m: 9 records
10–20 m: 1 records

Water temperature

Recorded in surface water of 17–30 °C

16–18 °C: 4 records
18–20 °C: 2 records
20–22 °C: 14 records
22–24 °C: 23 records
24–26 °C: 42 records
26–28 °C: 76 records
28–30 °C: 188 records

Photos

(c) R Sreeja, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Thomas Mesaglio, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Cheryl Stinchcomb, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Boson, some rights reserved (CC BY) · CC BY · iNaturalist
(c) Shaunak Modi, some rights reserved (CC BY) · CC BY · iNaturalist

Names and classification

English: Robust shell, robust shell

Names in 1 more languages

Japanese: ホソスジウズラタマキビ

Other scientific names: Littoraria (Protolittoraria) undulata, Littorina (Littoraria) undulata, Littorina acuminata, Littorina tenuis, Littorina undulata, Littorinopsis undulata, Melarhaphe undulata

Similar species

Littoraria scabra
Littoraria intermedia
Littoraria lutea
Littoraria pallescens
Pyramid Noddiwink
Nodilittorina pyramidalis
Afrolittorina praetermissa

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).
496 open-data records from 1839 to 2022.
Species data updated October 30, 2026.