Barnea pseudotruncata (Mollusca: Bivalvia: Pholadidae), a new species from Western Sahara (Morocco, W Africa), pp 1-5, 1 map, 1 table, 2 text figs, pls I-VII, by Frank Nolf & Johan Verstraeten

Abstract: A new Barnea species (PHOLADIDAE) is described from Western Sahara (Morocco, W Africa). It was already known but wrongly identified in recent literature, and never described due to a lack of material.

Keywords: New species, Barnea, PHOLADIDAE, Bivalvia, Western Sahara.

About the presence of Pholas dactylus Linnaeus, 1758 (Mollusca: Bivalvia: Pholadidae) in NW African and South African waters, pp 13-16, 1 map, 2 text figs, pls I-III, by Frank Nolf

Abstract: Although Pholas dactylus Linnaeus, 1758 is already known to live in Senegal and South Africa (Huber, 2015 – CD Rom: Chapter 5: Systematic listing of 8,500 valid species) few specimens are actually reported from these two areas due to a lack of material. Even von Cosel and Gofas (2020) did not mention this species in their extensive review of West African bivalves. Moreover, specimens from Western Sahara were mistaken for Pholas campechiensis Gmelin, 1791 by shell collectors and dealers. To end this widespread confusion both species are illustrated and commented on their differences.

Keywords: Pholas, PHOLADIDAE, Bivalvia, Western Sahara, South Africa.

Acesta arnaudi (Mollusca: Bivalvia: Limidae), a new species from the southwestern Indian Ocean), pp 21-28, 3 maps, 2 tables, 2 text figs, pls I-XI by Frank Nolf

Abstract: A new species of Acesta from the Crozet Islands (SW Indian Ocean) is described and compared with related species. This is the first record of an Acesta from the sub-Antarctic area. About 1981 the French biologist Patrick Arnaud already made a description in the manuscript of this species under the name Acesta subantarctica, but his paper has never been published for unknown reasons. In honour of his scientific work on the French southern islands, especially on the genus Acesta, the new species is dedicated to P. Arnaud. Furthermore, single valves and fragments of two other species were found off Marion Island and Amsterdam Island. One of them is similar with Acesta saginata Marshall, 2002, a species described from New Zealand and probably erroneously reported from New Caledonia.

Keywords: Mollusca, Bivalvia, LIMIDAE, Acesta, new species, Crozet Islands, SW Indian Ocean.