A case of stolen identity: Calliostoma lithocolletum, and the description of a ew species from the Canary Islands, pp. 1-16, 2 maps, 2 text figs, pls I-X, by Frank Nolf & Steve Hubrecht

Abstract: Calliostoma lithocolletum Dautzenberg, 1925 is only known from the holotype. Due to apparent careless control of the original description and the holotype, the name C. lithocolletum has been attributed by Nordsieck & García-Talavera (1979) to a species with different characteristics and colour. In the last decennia the mistake was taken over by subsequent authors, creating a chaos in the difficult study of eastern Atlantic calliostomatids. In this paper, the confused species from the Canary Islands is compared with the original species and described as Calliostoma simulatum.

Keywords: Mollusca, Gastropoda, CALLIOSTOMATIDAE, Calliostoma lithocolletum, Calliostoma simulatum sp. nov., Canary Islands, eastern Atlantic.

A tiny new Calliostoma species from Senegal, pp. 17-24, pls I-V, by Frank Nolf & Steve Hubrecht

Abstract: At the end of the past century a dozen specimens of a small Calliostoma species were offered for sale by the late Marcel Pin (Dakar, Senegal) as C. dubium (Philippi, 1844). In fact, that shell was very different from ‘C. dubium’ [(synonym of C. conulus (L., 1758)] and it revealed to be a new species, described as Calliostoma pini in this paper.

Keywords: Mollusca, Gastropoda, CALLIOSTOMATIDAE, Calliostoma pini sp. nov., Senegal, eastern Atlantic.

Description of a new species within the genus Propeamussium (Bivalvia: Propeamussiidae) from the Mississippi River Delta, pp. 25-29, 1 map, pls I-II, by Arne Ghys

Abstract: A new species of the family PROPEAMUSSIIDAE from the Gulf of Mexico is described on morphological basis and compared with congeneric species from the family in that region.

Keywords: Mollusca, Bivalvia, Pectinoidea, PROPEAMUSSIIDAE, Propeamussium, USA, Gulf of Mexico, new species.

Clelandella namibiensis (Gastropoda: Trochoidea: Trochidae: Cantharidinae), a new species from SW Africa, pp. 31-40, pls I-VII, by Frank Nolf

Abstract: Clelandella namibiensis sp. nov. from Namibia (SW Africa), is described in this paper and compared with similar species from the eastern Atlantic.

Keywords: Mollusca, Gastropoda, CALLIOSTOMATIDAE, Clelandella, Clelandella namibiensis sp. nov., Namibia, E Atlantic.