Admetula serrata ( Bronn, 1831 )

Harzhauser, Mathias & Landau, Bernard, 2012, A revision of the Neogene Cancellariid Gastropods of the Paratethys Sea 3472, Zootaxa 3472, pp. 1-71 : 9

Admetula serrata ( Bronn, 1831)

Cancellaria serrata Bronn, 1831: 44 .

Cancellaria (Bonellitia) serrata (Bronn) — Sacco 1894: 43, pl. 3, figs 5–10.

Cancellaria brandenburgi Boettger 1902: p. 38 .

Cancellaria brandenburgi Bttgr — Boettger 1906: 50.

Cancellaria brandenburgi Boettger — Zilch 1934: 260, pl. 17, fig. 22.

Bonellitia serrata ( Bronn, 1831) — Chirli 2002: 77, pl. 37, figs 9–16 [cum syn].

Admetula serrata ( Bronn, 1831) — Landau et al. 2006: 85, pl. 8, figs 5–6 [cum syn].

Bonellitia serrata ( Bronn, 1831) — Chirli & Richard 2008: 56, pl. 11, fig. 3.

Bonellitia serrata ( Bronn, 1831) — Sosso & Dell’Angelo 2010: 43, p. 60 unnumbered fig. top row middle.

Bonellitia serrata ( Bronn, 1831) — Caprotti 2011: 73 pars [non figs 9O–P Ovilia cf. andaluciensis (Landau, 1984) ].

Type material. The whereabouts of the types from the Pliocene of Italy are unknown ( Davoli 1982) .

Studied material. 10 specimens from Bologna and Modena ( Italy) NHMW 1863 /0023/0067.

Discussion. When describing Cancellaria brandenburgi as a new species, Boettger (1902) already recognised the similarity with Cancellaria serrata Bronn, 1831 and based his species on the more slender shell. The shape of Admetula serrata ( Bronn, 1831) , however, is variable and comprises bulky and slender shells (see Chirli 2002). Therefore, we follow Landau et al. (2006) and treat Boettger’s species as a synonym of Admetula serrata ( Bronn, 1831) . See Zilch (1934) for an illustration of a Paratethyan specimen of that species.

Distribution. The species appears during the Burdigalian in the Proto –Mediterranean Sea ( Sacco 1894) and spreads into the Paratethys during the early Middle Miocene. It seems to retreat from the Paratethys already during the Serravallian. It is quite common during the Late Miocene of the Proto –Mediterranean Sea and experiences its maximum distribution during the Pliocene, when it is known also from the North East Atlantic ( Spain) and the North Sea Basin (Harmer 1916). It finally, disappears in the Mediterranean Sea during the Piacenzian (Pliocene) ( Landau et al. 2006).

Paratethys —early and middle Badenian: Vienna Basin ( Austria: Baden–Sooss), Transylvanian Basin ( Romania: CoŞteiu de Sus). Proto –Mediterranean Sea —Burdigalian ( Italy: Colli Torinesi), Tortonian ( Italy: Montegibbio, Stazzano, Sant’Agatha), Early Pliocene ( Spain: Estepona; France: Roussillon; Italy), Piacenzian ( Italy). North Sea —Early Pliocene ( Great Britain).