Bonellitia bonellii ( Bellardi, 1841 )

Harzhauser, Mathias & Landau, Bernard, 2012, A revision of the Neogene Cancellariid Gastropods of the Paratethys Sea 3472, Zootaxa 3472, pp. 1-71 : 9-10

Bonellitia bonellii ( Bellardi, 1841)

Figs 3A, 4A 1–A 3

Cancellaria bonellii Bellardi 1841: 24 , pl. 3, figs 3–4.

Cancellaria Bonellii Bell. — Hörnes 1848: 19.

Cancellaria Bonellii Bell. —Hörnes 1854: 315, pl. 34, figs 19a–b.

Cancellaria Bonellii Bell. — Hoernes & Auinger 1890: 273.

Cancellaria (Bonellitia) Bonellii (Bell.) — Sacco 1894: 42, pl. 3, fig. 1.

Admete (Bonellitia) bonellii (Bellardi) — Sieber 1936: 101.

Sveltia taurina [sic] Bellardi— Moisescu 1955: 280, pl. 2, figs 4–4a [non Cancellaria lyrata var. taurinia Bellardi, 1841 ]. Bonellitia bonellii (Bell.) — Sieber 1956: 245.

Admete (Bonellitia) bonellii ( Bellardi 1841) — Kojumdgieva & Strachimirov 1960: 162, pl. 42, fig. 19.

Cancellaria (Bonellitia) bonellii Bellardi, 1841 — Strausz 1966: 385, pl. 44, figs 1, 4.

Cancellaria (Bonellitia) bonellii unicosticillata Sacco — Csepreghy-Meznerics 1969a: 93, pl. 5, figs 3, 38.

? Admete (Bonellitia) bonelli (Bellardi) — Hölzl 1973: 194.

Bonellitia bonellii ( Bellardi, 1841) — Chirli 2002: 76, pl. 37, figs 1–8.

Bonellitia bonellii ( Bellardi, 1841) — Landau et al. 2006: 84, pl. 8, figs 3–4 [cum syn].

Bonellitia bonellii ( Bellardi, 1841) — Chirli & Richard 2008: 56, pl. 11, figs 1–2.

Bonellitia bonellii ( Bellardi, 1841) — Brunetti et al. 2009: 57, Figs 1A–I.

Type material. syntype BS.045.10.001, Museo Regionale di Scienci Naturali , Torino ( Italy); S. Agata ( Italy), Tortonian (Late Miocene) [data from Ferrero-Mortara et al. 1984] .

Studied material. 7 spec. Baden ( Austria) NHMW 1846 /0037/0296, 2009z0068/0016; 6 spec. Baden–Sooss ( Austria) NHMW 1869 /0001/0088; 1 spec. Bad Vöslau ( Austria) NHMW 1862 /0001/0323; 6 spec. Möllersdorf ( Austria) NHMW 1866 /0001/0698; 2 spec. Steinebrunn ( Austria) NHMW 1871 /0011/0024; 9 spec. Lăpugiu de Sus ( Romania) NHMW 1865 /0001/0216; 4 spec. Hrušovany (Czech Rep.) NHMW 1861 /0011/0082.

Illustrated material. Figs 3A, 4A 1–A 3: specimen illustrated in Hörnes (1854, pl. 34, figs 19a–b), Baden ( Austria), height: 16.2 mm, width: 10.0 mm, NHMW 2009z0098/0016.

Discussion. See Landau et al. (2006) for a detailed description. The specimen illustrated by Hörnes (1854) has a rather homogenous sculpture whilst most other specimens in the collection of the NHM tend to develop a more pronounced sculpture, with tiny spines at the intersections of the axial ribs and spiral cords. These agree fully with Pliocene representatives of that species as illustrated by Chirli (2002) and Landau et al. (2006). Similarly, the protoconch with the depressed initial part is identical to that of the Pliocene specimen illustrated in Landau et al. (2006). The angulated whorls and the densely spaced spiral threads on the sutural ramp allow a separation from Admetula serrata ( Bronn, 1831) . A strongly sculptured specimen from Romania was erroneously identified as Sveltia taurinia ( Bellardi, 1841) by Moisescu (1955). Sveltia taurinia is an Early Miocene Italian species, which clearly differs from the Romanian Middle Miocene shell in its slender shell and incised sutures.

Distribution. This species is widespread during the Badenian in the Paratethys Sea and occurs also along the coasts of the North East Atlantic at that time. During the Late Miocene it is recorded from the Proto –Mediterranean Sea, where it persists up to the Piacenzian ( Landau et al., 2006). The record from the Early Miocene of the North Alpine Foreland Basin in Hölzl (1973) is dubious.

Paratethys —Badenian: Vienna Basin ( Czech Republic: Hrušovany; Austria: Niederleis, Steinebrunn, Bad Vöslau, Baden, Baden–Sooss, Möllersdorf); Eisenstadt–Sopron Basin ( Austria: Forchtenau, Walbersdorf; Hungary: Sopron); Mecsek Mountains and Pannonian Basin ( Hungary: Letkés, Bóta); Transylvanian Basin ( Romania: Lăpugiu de Sus); Dacian Basin ( Bulgaria: Urovene). North East Atlantic —Middle Miocene: Aquitaine Basin ( France). Proto –Mediterranean Sea —Late Miocene: Italy (Montegibbio); Early Pliocene: Italy, Spain; Piacenzian: Italy.