Urlocella Gründel, 1998

Gründel, Joachim & Nützel, Alexander, 2013, Evolution and classification of Mesozoic mathildoid gastropods, Acta Palaeontologica Polonica 58 (4), pp. 803-826 : 817-818

Genus Urlocella Gründel, 1998

Fig. 9J .

Type species: Urlocella minuera Gründel, 1998 , original designation; Bathonian to Callovian, Poland and NE Germany.

Included species: Urlocella minuera Gründel, 1998 , Bathonian–Callovian; Urlocella sp. nov. sensu Gründel 1998, Pliensbachian; Urlocella cf. minuera Gründel, 1998 sensu Bandel 2005 , Pliensbachian.

http://dx.doi.org/10.4202/app.2012.0052

Emended diagnosis.—Shell slender; whorls convex; suture deep; protoconch tofanellid, consisting of about two whorls; first teleoconch whorl wider than protoconch; teleoconch ornament consists of parasigmoidal axial ribs and spiral ribs; teleoconch ornament reduced during ontogeny; base convex, not demarcated from whorl face; aperture broadly oval.

Remarks.— Kaim (2004) considered Urlocella to represent a synonym of Chrysallida Carpenter, 1856 . However, Bandel (2005) did not accept this because Chrysallida has no tofanellid protoconch and therefore represent a genus of the Pyramidellidae . Instead Bandel (2005) considered Urlocella to represent a synonym of Graphis . We consider this synonymy to be unlikely as was outlined above (see Remarks un− der Graphis ).

Stratigraphic and geographic range.—Pliensbachian to Callovian; Germany, Poland.

Figures

Fig. 9. Type species and examples for Triassic and Jurassic genera of the family Tofanellidae. A, B. Tofanella laevigata (von Münster, 1841), Cassian Formation, Alpe di Specie, Dolomites, N Italy, Late Triassic A. From Bandel (1995: pl. 10: 1). B. From Bandel (1995: pl. 10: 2). C. Cristalloella (Cristalloella) cassiana Bandel, 1995, Cassian Formation, Campo, Dolomites, N Italy, Late Triassic; from Bandel (1995: pl. 10: 9). D. Cristalloella (Wonwalica) minuta Schröder, 1995, Wąwał, Poland, Valanginian; from Schröder (1995: pl. 10: 1). E. Neodonaldina elongata (Zardini, 1978), Cassian Formation, Alpe di Specie, Dolomites, N Italy, Late Triassic. Protoconch (E1) from Bandel (1996: fig. 5d), whole specimen (E2) from Bandel (1996: fig. 6a). F. Graphis rotundata (Gründel, 1998), borehole Heringsdorf 4/63, Germany, middle Callovian; from Gründel (1998: pl. 1: 5). G. Graphis albida (Kanmacher, 1798), Pliocene, Nice/France; from Bandel (2005: fig. 64). H. Camponaxis lateplicata (Klipstein, 1843), Cassian Formation, Misurina, Dolomites, N Italy, Late Triassic; from Bandel (1995: pl. 14: 3). I. Usedomella laevigatoidea (Gründel, 1993), borehole Kłęby 1/37 (formerly Klemmen), Poland, Callovian; from Gründel (1998: pl. 2: 19). J. Urlocella minuera Gründel, 1998, bore Kłęby 1/37, late Bathonian; from Gründel (1998: pl. 1: 11).