Coelostylina sp. 2

Hausmann, Imelda M., Nützel, Alexander, Roden, Vanessa Julie & Reich, Mike, 2021, Palaeoecology of tropical marine invertebrate assemblages from the Late Triassic of Misurina, Dolomites, Italy, Acta Palaeontologica Polonica 66 (1), pp. 143-192 : 156

Coelostylina sp. 2

Fig. 12C .

Material.— One specimen ( PZO 12692 ) from the Misurina Landslide surface sample, Italy, Carnian, Triassic .

Description.—This fusiform shell consists of about four whorls (apex missing), has largely smooth, convex whorls with almost straight orthocline growth lines and a faint spiral micro-striation.

Remarks.—This form resembles Coelostylina species, for instance Coelostylina (Pseudochrysalis) stotteri (Klipstein, 1843) (see Zardini 1978: pl. 30: 6), to some degree but an umbilical chink seems to be absent.

Figures

Fig. 12. Caenogastropods from Lago Antorno (A) and Misurina Landslide (B–F), northern Italy, Cassian Formation, Carnian, Upper Triassic. A. Unidentified caenogastropod, PZO 12829, in lateral view.B. Coelostylina sp.1, PZO 12691, in apertural view. C. Coelostylina sp. 2, PZO 12692, in lateral view. D. Flemingella bistriata (Münster, 1841), PZO 12713, in apertural view. E. Coelochrysalis pupaeformis (Münster, 1841), PZO 12714, in lateral view, with constriction of last whorl. F. Coelochrysalis pupaeformis (Münster, 1841), PZO 12715, deformed specimen in lateral view, showing constriction of last whorl.