Schafbergia Gatto and Monari, 2010

Gründel, Joachim & Nützel, Alexander, 2013, Evolution and classification of Mesozoic mathildoid gastropods, Acta Palaeontologica Polonica 58 (4), pp. 803-826 : 814-815

Genus Schafbergia Gatto and Monari, 2010

Fig. 7D .

Type species: Chemnitzia crenata Stoliczka, 1861 , original designation; Pliensbachian ; Austria .

Included species: Chemnitzia crenata Stoliczka, 1861 , Pliensbachian;? Chemnitzia turgida Stoliczka, 1861 , Sinemurian; Proacirsa (Schafbergia) zirettoensis Gatto and Monari,2010 , Sinemurian–Pliensbachian.

Emended diagnosis.—Shell shape similar to that of Proacirsa ; protoconch unknown; early teleoconch whorls ornamented with several spiral ribs on the abapical whorl portion which are intersected by numerous axial ribs; intersections of axial and spiral ribs nodular; axial ribs reduced after a few whorls; mature teleoconch whorls with numerous weak spiral ribs which are somewhat more distinct in the abapical portion of the whorls; base with numerous somewhat broadened spiral ribs.

Remarks.— Proacirsa differs in having three spiral ribs which are distributed over the entire whorl face and in having fewer axial ribs in the early teleoconch whorls, in having rather broad spiral ribs on the base and a smooth whorl face in mature teleoconch whorls.

Stratigraphic and geographic range.—Sinemurian to Pliensbachian, Early Jurassic; Italy, Austria, Hungary.

Figures

Fig. 7. Type species and examples for Triassic and Jurassic genera of the family Gordenellidae. A. Camponella pianozensis (Zardini, 1985), Cassian Formation, S Tyrol, Italy, Late Triassic; from Bandel (1995: pl. 8: 7). B. Proacirsa sp., cf. struvii (Lahusen, 1883), Dubki near Saratov, Russia, late Callovian; from Gründel (2005: pl. 5: 12, 16). Whole specimen (B1), protoconch (B2). C. Proacirsa laevigata (Eudes−Deslongchamps, 1843), erratic boulder from Bauer−Wehrland, Germany, Callovian; from Gründel (2000: pl. 1: 15). D. Schafbergia crenata (Stoliczka, 1861), Schafberg near St. Wolfgang, Austria, late Pliensbachian; from Szabó (2008: fig. 87B).