Petaloconchus intortus ( Lamarck, 1818 )

Petaloconchus intortus ( Lamarck, 1818) View in CoL

( Fig. 5E View FIG )

Serpula intorta Lamarck, 1818: 365 .

Petaloconchus intortus View in CoL – 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).