Pseudamussium alicei: Latin description:
"Testa 19 mm. alta, 18 mm. lata, 3 1/2 mm. crassa, tenui cula, flabelliformis, subaequivalvis, utrinque convexiuscula, valvula dextra quam sinistra paululum convexior, subaequilateralis, leviter obliqua. Apices acuti marginem dorsualem paulo transeunt. Valvulae plicis 6-8 ac costellis confertis, tenuissimeque imbricatus, versus marginem nonnullis fortioribus, radiatim sculpta. Lineae quoque incrementi irregulares, versus marginem confertiores ac lamellosae accedunt. Auriculae posticae parvae, squamis acutis, radiatum ordinatis ornatae. Auriculae anticae multo majores. Auricula antica valvulae dextrae planulata, auriculam valvulae sinistrae superans, sat profunde emarginata, bipartita: supra costis 4 vel 5 radiantibus ac plicis incrementi ornata, infra tantum transverse arcuatim plicata. Plicae incrementi in marginem dorsualem spinas aliquot acutas formant. Auricula antica valvulae sinistrae costis 4 vel 5 radiantibus ac plicis incrementi ornata, a margine auriculae dextrae superatur. Valvularum pagina interna nitens, laevigata, radiatim costata et versus marginem tenuiter crenulatum, costellata. Cardo angustus, lamella laterali unica in valvula dextra tantum utrinque munitus, ac medio fossula ligamentari parva instructa. Color pallide lutescens." {fide Dautzenberg & Fischer, 1897)

Additional Description: Shell thin, compressed, and slightly oblique. Both valves with 8 to 9 radial ribs, with fine radial striae. Auricles very unequal. Color usually white, cream, or red. Size: Normal adult size range is 24 to 30 mm.

Description. - Shell always longer than wide. Left valve 9 ribs equally pronounced, right valve 8 primary ribs equally pronounced. Anterior auricles 1.70-1.73 times as large as posterior ones. Anterior auricle right valve 7 ribs, left valve 5 ribs. Posterior auricles right valve 4 ribs, left valve 3 ribs. Microsculpture of primary and secondary ribs of left valve and ribs of right valve composed of coalesced hollow riblets. Byssal notch broad, ctenolium relatively broad too. Top angle varying from 92°-98°. Colour generally uniformly white or cream, although red specimens have been examined also. Dimensions. - One of the complete specimens examined measured 23.2 mm height x 22.9 mm width x 4.5 mm depth.
Distribution. - Azores, Canary Islands, Cape Verde, and along the coast of West Africa south to Namibia. Remarks. - Actually this is not a truly European species, but as it originates from the Azores (central Atlantic) it is included in this study. It has clearly more resemblance to the southwest African Karnekampia gilchristi (Sowerby 3th, 1904), than to K. bruei or K. sulcata.

Pseudamussium alicei: From the Azores and along the coast of West Africa.
Habitat: Littoral to sublittoral zones, on sandy or gravelly bottoms.