Pliocene gastropod faunas from Kallo (Oost-Vlaanderen, Belgium) — Part 3. Caenogastropoda: Aporrhaidae to Muricidae, and Part 4. Buccinidae to Helicidae

With Parts 3 and 4 of the current series, the taxonomic revision of Pliocene gastropods from temporary exposures at Kallo (Oost-Vlaanderen, Belgium) is completed. Material collected from the early Pliocene Kattendijk Formation and the middle-late Pliocene Oorderen, Kruisschans and Merksem members of the Lillo Formation is described and illustrated, and stratigraphic and geographic ranges of species are discussed. Twenty-nine (sub)species are new to the Belgian Pliocene, viz. Lamellaria perspicua (Linné, 1758), Euspira cirriformis gottschei (Kautsky, 1925), Cryptonatica operculata (Jeffreys, 1885), Krachia zelandica (Beets, 1946), Cerithiopsis barleei Jeffreys, 1867, Cerithiopsis nana (Wood, 1848), Aclis ascaris (Turton, 1819), Cirsotrema (C.) fimbriosum exfimbriosum Sacco, 1891, Vitreolina philippii (Rayneval & Ponzi, 1854), Crinophteiros collinsi (Sykes, 1903), Pterynopsis binominatus (Staadt in Cossmann, 1909), Trophon barvicensis (Johnston, 1825), Anachis anglica (Bell in Wood, 1874), Fusinus longiroster (Brocchi, 1814), Babylonella fusiformis subangulosa (Wood, 1848), Pyramidella plicosa Bronn, 1838, Evalea divisa (J. Adams, 1797), Ondina obliqua (Alder, 1844), Anisocycla nitidissima (Montagu, 1803), Menestho britannica Bell, 1873, Brachystomia albella (Lovén, 1846), Diaphana minuta Brown, 1827, Cylichna concinna (Wood, 1839), Philine ventrosa (Wood, 1839), Philine denticulata (J. Adams, 1800) and Limacina atlanta (Mörch, 1874). Brachystomia cerullii nov. nom. is proposed to replace Brachystomia lineolata (Cerulli-Irelli, 1914) non Sandberger, 1859, while Cerithiopsis keukelaari is described as new, and previous records of ‘Cerithiopsis tuberculata (Montagu, 1803)’ are shown not to belong to that species but to four others.