Sinuarbullina sp. 3

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 : 171

Sinuarbullina sp. 3

Fig. 25B, C .

Material.—Two shells (PZO 12852, 12853) from Lago Antorno bulk samples, Italy, Carnian, Triassic.

Description.—Shell slender, 0.4 mm wide, 1.1 mm high ( Fig. 25B ).

Remarks.—This species is distinct from the two Sinuarbullina species in being more slender and having higher whorls and more oblique sutures. Moreover, the protoconch is smaller than in the other Sinuarbullina species.

Figures

Fig. 25. Heterobranch gastropods from Lago Antorno (A–C) and from Misurina Landslide (D, E), northern Italy, Cassian Formation, Carnian, Upper Triassic. A. Sinuarbullina sp. 1, PZO 12850, in apertural view. B. Sinuarbullina sp. 3, PZO 12852, in lateral view. C. Sinuarbullina sp. 3, PZO 12853, in lateral view. D. Sinuarbullina sp. 1, PZO 12736, in apertural view. E. Sinuarbullina sp. 2, PZO 12738, in lateral view.