The recent apple snails of Africa and Asia (Mollusca: Gastropoda: Ampullariidae: Afropomus, Forbesopomus, Lanistes, Pila, Saulea): a nomenclatural and type catalogue. The apple snails of the Americas: addenda and corrigenda Author Cowie, Robert H. text Zootaxa 2015 3940 1 1 92 journal article 10.11646/zootaxa.3940.1.1 5013eaff-bb37-4be3-a1ea-43c11d0cf5d1 1175-5326 288204 B5D45D1B-4B52-4F0B-8AF6-B587F8857475 nyassanus Lanistes nyassanus Dohrn, 1865 : 233 . Type material —location unknown [possibly destroyed, not found in MCZ or NHMUK (cf. Dance 1986 : 210 )]. Type locality —“south end of Nyassa... Lake Pamolombue” [south end of Lake Malawi ... Lake Malombe]. Distribution —no additional information. Remarks . Gaudion (1880: 35) and Bourguignat (1879: 39) both listed it from the Zambezi, probably considering the type locality part of the Zambezi system, although it is the Shire River, a tributary of the Zambezi, that connects Lakes Malawi and Malombe, and Dohrn (1865: 233) explicitly said it was not found in the Zambezi. Brown (1980 : 52, 1994: 61) and Berthold (1990: 48) incorrectly stated that it was endemic to Lake Malawi . Valid species, teste Kobelt (1911: 17) , who placed it in Meladomus , and G.B. Sowerby III (1916: 67), Pilsbry & Bequaert (1927: 187) , Brown (1980 : 52, 1994: 61) and Berthold (1991: 246) , who all placed it in Lanistes s . str . Type species of Nyassana Bourguignat, here synonymized with Lanistes Montfort. olivacea Ampullaria olivacea Lamarck, 1816: 12 , pl. 457, figs. 1a, b. Type material —location unknown [not listed in MNHG ( Mermod 1952: 97 )]. Type locality —[no locality given]. Remarks . Lamarck (1822a: 178) listed olivacea Lamarck in the synonymy of guinaica Lamarck. Synonym of varica Müller , teste Pilsbry & Bequaert (1927: 187; as “Bory de St. Vincent ”) .