Confirmation of the range extension of Schilderina achatidea (Gray, 1837) (Mollusca: Gastropoda: Cypraeidae) from Galicia (Spain) in the north towards northern Namibia in the south of the Eastern Atlantic, pp 1-7, 1 map, pls I-IV, by Frank Nolf

Abstract: This paper confirms the presence of Schilderina achatidea (Gray, 1837) from Galicia (N Spain) to Cape Fria (Namibia). It turned out that it is not possible to differentiate specimens from the W Mediterranean Sea and localities along the West African coast. Except for S. achatidea verdensis Lorenz, 2017, there is no reason to recognize subspecies as oranica Crosse, 1896, inopinata Schilder, 1930 and longinqua Schilder & Schilder, 1938. These so-called subspecies refer to areas which are not separated from each other. Molecular analysis is needed to support this statement.

Keywords: Mollusca, Gastropoda, Cypraeidae, Schilderina achatidea, Bay of Biscay, Namibia, subspecies, range extension.

Mulinia lateralis (Say, 1822) (Mollusca: Bivalvia: Mactridae): comparison between native and introduced populations, and differences with Spisula subtruncata (da Costa, 1788), pp 8-11, 1 map, 1 table, 4 text figs, pls I-V, by Frank Nolf

Abstract: This paper reports finds of Mulinia lateralis (Say, 1822) from its native area, which is the western Atlantic Ocean, ranging from the Gulf of St Lawrence to the Gulf of Mexico and also from the North Sea, more specific from The Netherlands and the Belgian coast. Since June 2017 the presence of the dwarf surf clam has often been reported in the Dutch coast waters (a.o. Craeymeersch et al., 2019) and since January 2019 also on the Belgian beaches between Bredene and Knokke (Kerckhof, 2019; Vansteenkiste, 2021; Bauwens, 2021). A comparison between representatives from the W Atlantic and those found in Belgian coastal waters has been made and differences between Mulinia lateralis (Say, 1822) and Spisula subtruncata (da Costa, 1778) are commented and figured.

Keywords: Mollusca, Bivalvia, Mactridae, Mulinia lateralis, W Atlantic, North Sea, non-indigenous species.

Description of a new species in the genus Cymbium (Mollusca: Gastropoda: Volutidae) from Cameroon, pp 19-22, 1 map, pls I-XII, by Frank Nolf

Abstract: The present paper deals with the description of a new species within the genus Cymbium(Gastropoda: Volutidae) from Cameroon. A comparison is made with other species living in the same and adjacent waters.

Keywords: Cymbium, Volutidae, Gastropoda, Mollusca, new species, Cameroon.

Two new species of Terebridae from Ecuador, pp 35-39, pl 1, by Yves Terryn

Abstract: Neoterebra salangoensis sp. nov. and Neoterebra bonardi sp. nov. are described from Ecuador and compared to their morphological allies.

Keywords: Terebridae, Neoterebra, Neoterebra salangoensis sp. nov., N. bonardi sp. nov., N. elata (Hinds, 1844), N. guayaquilensis (E. A. Smith, 1880), N. ira (Pilsbry & H. N. Lowe, 1932), N. montijoensis (Pilsbry & H. N. Lowe, 1932), N. panamensis (Dall, 1908), N. polygonia (Reeve, 1860), N. sanjuanensis (Pilsbry & H. N. Lowe, 1932), N. shyana (Bratcher & Burch, 1970)