Welcome to the Monsecour Brothers specimen shells website!

We are David and Kevin Monsecour, both shell collectors. Like most shell dealers the hobby grew and so many shells were acquired that we started selling shells next to our normal professions. We both specialised in different families, and almost don't have a general collection, so many of the species you can find on this site are not even in our own collections. Read more about us in the about us section.

A big part of our stock are shells from older collections we were able to buy in the past; there are some pieces that were once easy to get, but now very hard to obtain. We also have lots of fresh shells from all over the world. We have personal suppliers in Madagascar, the Philippines, Australia and regular input from other places.

All shells are selected and normally quality and size is indicated. The goal is to supply every sample of shells with a picture of one of the specimens available. This will most probably take some months, as the shell sales are next to our professions. When you want to see a not yet photographed shell or you want to know more about a shell with missing data, don't hesitate to contact us! We will supply you with photographs and place them online.

HAPPY SHELLING!
David & Kevin

Newest shells

Semicassis bisulcata - (Schubert & Wagner, 1829)
Philippines. Masbate. Trawled. August 2006.
F+ / 50mm
#60667
chip in columella.
4.00 EUR
8 Nov 2026
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Semicassis bulla - Kuroda & Habe, 1951
Hawaiian islands. N of Oahu. in lobster trap 100m.
F+ / 47mm
#60664
sipho imperfect.
20.00 EUR
8 Nov 2026
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Semicassis craticulata - Euthyme, 1885
South Africa. KwaZulu Natal. off Scottborough. Trawled at 135m. March 2006.
F+ / 45mm
#60663
7.00 EUR
8 Nov 2026
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Semicassis angasi - Iredale, 1927
Australia. Queensland. Sandy Cape. Trawled at 120m. December 2014.
F+ / 39mm
#60661
sipho imperfect
10.00 EUR
8 Nov 2026
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Semicassis angasi - Iredale, 1927
Australia. Queensland. Dingo Beach. in sand at low tide. December 1991.
F++ / 41mm
#60660
10.00 EUR
8 Nov 2026
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Semicassis pyrum - (Lamarck, 1822)
Australia. New South Wales. Eden. Trawled at 365m.
F+ / 45mm
#60658
6.00 EUR
8 Nov 2026
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Top shells

Barycypraea fultoni fultoni - (Sowerby, 1903)
South Africa. Natal. Ramsgate. Dredged at 90m. 2017.
F++ / 60mm
#26901
Live-taken, very slender specimen with a very beautiful pattern. Shell slightly unequelly rounded. One tiny imperfection in the columellar callus, probably a repelled octopus attack.
6500.00 EUR
18 Jun 2026
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Tonna dolium - (Linnaeus, 1758)
Philippines. Palawan. From fishermen. April 2010.
F+ / 121mm
#22981
Freak specimen with almost flat spire and strongly angulated shoulders.
40.00 EUR
23 May 2026
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Zoila eludens eludens - Raybaudi, 1991
Australia. WA. Exmouth. Muiron islands. Dived on sponge at 25-30m.
F+++ / 69mm
#52809
High dorsum. Bulbous. Good colouration.
1600.00 EUR
4 Jun 2025
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Zoila jeaniana praeclara - Lorenz, 2020
Australia. WA. S Zuytdorp Cliffs. By ROV at 85m.
F++ / 69mm
#52806
Very nice colouration.
1950.00 EUR
4 Jun 2025
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Barycypraea fultoni fultoni - (Sowerby, 1903)
South Africa. Natal. Trafalgar. Trawled at 60-75m. 2021.
F+++ / 58mm
#52804
live-taken. High margins. Warm colours.
7450.00 EUR
4 Jun 2025
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Naquetia fosteri - D'Attilio and Myers, 1987
Israel. Eilat. March 2005.
F++ / 71mm
#46976
w/o. Rare species in good condition.
1200.00 EUR
1 May 2024
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