Erratothilda Gründel, 1997

Gründel, Joachim & Nützel, Alexander, 2013, Evolution and classification of Mesozoic mathildoid gastropods, Acta Palaeontologica Polonica 58 (4), pp. 803-826 : 808

Genus Erratothilda Gründel, 1997

Fig. 3C .

Type species: Eucycloidea erratica Gründel, 1990 , original designation; glacial erratic boulder from Bauer−Wehrland / Mecklenburg−Vorpommern, NE Germany, Callovian .

Included species: Eucycloidea erratica Gründel, 1990 , Callovian; Erratothilda dziki Kaim, 2004 , Valanginian; Erratothilda krawczynski Kaim, 2004 , Valanginian;? Erratothilda wascherae Gründel, 2006 , Late Bathonian.

Emended diagnosis.—Shell and ornament basically as in Angulathilda . However, Erratothilda has three or more primary spiral ribs. Erratothilda has a pronounced micro−ornament.

Remarks.—The characteristic micro−ornament has not been shown for Erratothilda wascherae Gründel, 2006 which comes from a locality at which the preservation is not sufficient to show such fine details.

Stratigraphic and geographic range.—Questionable Bathonian, certainly from the Callovian to Early Cretaceous; Germany,? France.

Figures

Fig. 3. Type species and examples for Jurassic genera of the family Mathildididae. A. Carinathilda carinata Gründel, 1997, bore Kłęby (formerly Klemmen) 1/37, Poland, Bathonian; from Gründel (1997: pl. 7: 98). B. Angulathilda calloviensis (Gründel, 1997), erratic boulder from Hohendorf near Wolgast 3/96/3, Germany, Callovian; from Gründel (1997: pl. 7: 98, 101). Whole specimen (B1), detail of the ornament (B2). C. Erratothilda erratica (Gründel, 1990), erratic boulder from Bauer−Wehrland, Germany, Callovian; from Gründel (1997: pl. 7: 104, 105). Whole specimen (C1), detail showing ornament (C2).