(Fig. 5E)
Serpula intorta Lamarck, 1818: 365.
Petaloconchus intortus – Van Dingenen et al. 2016: 65, pl. 5, fig. 15. — Landau et al. 2018: 246, pl. 74, fig. 1.
MATERIAL AND DIMENSIONS. — Maximum height 4.0 mm, width 8.2 mm. — RGM.1364906 (10), leg. WG; RGM.1364971 (17), leg. ACJ; RGM.1365071 (100+), leg. AWJ; RGM.1365216 (1), leg. AWJ.
SPECIES CHARACTERISATION. — Irregularly coiled gastropod with round cross-section; surface details worn in all material and protoconch lacking.
DISTRIBUTION. — Lower Miocene: Proto-Mediterranean, Italy (Sacco 1896b). — Lower-Middle Miocene: NSB, Belgium (Glibert 1952), Germany (Anderson 1964; Moths 1989), Netherlands (Janssen 1984). Middle Miocene: Atlantic, Aquitaine Basin, (Cossmann & Peyrot 1924; Lozouet et al. 2001), Loire Basin, France (Glibert 1949); Paratethys, Poland (Friedberg 1914; Bałuk 1970, 1975), Austria (Hörnes 1856; Tejkal et al. 1967; Schultz 1998), Bulgaria (Kojumdgieva & Strachimirov 1960), Hungary (Strausz 1966), Romania (Moisescu 1955; Stancu & Andreescu 1968); Proto-Mediterranean, Karaman Basin, Turkey (Erünal-Erentoz 1958; Landau et al. 2013). — Upper Miocene: Atlantic, NW France (Landau et al. 2018); Proto-Mediterranean, Italy (Sacco 1896b), Tunisia (Stchepinsky 1938). — Lower Pliocene: NSB, England (Wood 1848; Harmer 1918), Belgium (Glibert 1958; Marquet 1998); Atlantic, NW France (Van Dingenen et al. 2016), Spain (González-Delgado 1986; Landau et al. 2011), Morocco (Lecointre 1952); western Mediterranean, NE Spain, (Martinell & Domènech 1984; Solsona 1998), France (Fontannes 1879); central Mediterranean, Italy (Sacco 1896b; Palla 1967; Caprotti 1974; Anfossi et al. 1983; Baroncelli 2001); Tunisia (Fekih 1975). — Lower-Upper Pliocene: Atlantic, Mondego Basin, Portugal (Zbyszewski 1959; Silva 2001); western Mediterranean, Spain (Landau et al. 2004); central Mediterranean, Italy (Malatesta 1974; Cavallo & Repetto 1992). — Upper Pliocene-Pleistocene: NW France (Brébion 1964). — Lower Pleistocene: Atlantic, Selsoif (this paper); central Mediterranean, Italy (Cerulli-Irelli 1912; Taviani et al. 1998).
REMARKS
Specific identity is difficult to establish due to lack of protoconch in the studied material. Here tentatively assigned to Petaloconchus intortus (Lamarck, 1818), a common species in fossil faunas from North West Europe. The modern species Petaloconchus glomeratus (Linnaeus, 1758) is similar to P.intortus except for the protoconch, absent in the specimens from Selsoif. For further discussion see Landau et al. (2018: 246).