Zygopleura Koken, 1892

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 : 163

Genus Zygopleura Koken, 1892

Type species: Turritella hybrida Münster, 1841 ; Late Triassic , northern Italy .

Zygopleura sp.

Fig. 18 .

Material.—Two larval shells, both from bulk samples; 1 from Lago Antorno ( PZO 12711); 1 from Misurina Landslide ( PZO 12836); Italy, Carnian, Triassic.

Description.—Broadly conical larval shells with immersed initial whorls; whorls smooth except for sub- and suprasutural rows of minute nodules; specimen from Lago Antorno ( Fig. 18A ) broken; 0.67 mm high, 0.57 mm wide; specimen from Misurina Landslide ( Fig. 18B ) 1.02 mm high, 0.85 mm wide.

Remarks.—The larval shells at hand are typical of zygopleurid protoconchs ( Bandel 1991; Nützel 1998).

Figures

Fig.18. Zygopleurid larval shells of Zygopleura sp.from LagoAntorno (A) and Misurina Landslide (B), northern Italy, Cassian Formation, Carnian, Upper Triassic. PZO 12836 (A) and PZO 12711 (B), in lateral view.