Neptunea 6(4)

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Description of Drillia annielonae, a new species closely related to Drillia angolensis Odhner, 1923 (Mollusca: Gastropoda: Drilliidae), pp. 1-5, plates I-IV by Frank Nolf & Johan Verstraeten.

In the last decade a number of shells have been offered as ‘Drillia angolensis Odhner, 1923’. In fact it rarely happens one of them is really that species. The shells are at present known from a somewhat restricted area off Luanda, Angola. Specimens of the new species Drillia annielonae present a certain similarity to D. angolensis, but are more elongated. They are uniformly white coloured or provided with brown colour between the white oblique costae.
Furthermore, a lectotype for the controversial species D. angolensis is introduced.

Key words: GASTROPODA, DRILLIIDAE, Drillia annielonae, Drillia angolensis, new species, introduction lectotype, Angola.

Clavatula knudseni (Mollusca: Gastropoda: Clavatulidae): a new turrid species from West Africa, pp. 10-13, plates I-IX by Frank Nolf & Johan Verstraeten.

A new turrid species, apparently similar to Clavatula mystica and C. regia, is described from Senegal, Gambia and Ivory Coast. The species is dark orange or olive-brown coloured and is provided with a large number of oblique ribs on the last whorl of a small shell.

Key words: GASTROPODA, CLAVATULIDAE, Clavatula knudseni, new species, Senegal.

About a possible further range extension for Clavatula mystica (Reeve, 1843)(Mollusca: Gastropoda: Clavatulidae), pp. 23-26, plates I-IV by Frank Nolf.

Typical specimens of Clavatula mystica (Reeve, 1843) have been found in Abidjan (Ivory Coast) and Ambriz (North Angola), which means a serious range extension compared to the geographic distribution described by other authors (Boyer & Hernández, 2004). These individuals are completely similar to those from NW Africa, but as no other specimens have been described from the Gulf of Guinea until now, only a provisional expansion of the real distribution of this species can be stated at present.

Key words: GASTROPODA, CLAVATULIDAE, Clavatula mystica, range extension, Ivory Coast, Angola.