Laevitomaria sp.

Szabó, János, 2017, Gastropods of the Lower Jurassic Hierlatz Limestone Formation, part 3. New pleurotomarioideans from the fauna of Hierlatz Alpe (Hallstatt, Austria), Fragmenta Palaeontologica Hungarica 34, pp. 9-48 : 42-43

Laevitomaria sp.

( Figs 137–139 )

Material – A single fragmentary, early teleoconch (GBA 2018/002/0012).

Measurements – Height: 11.5 mm, width: 11.5 mm.

Description – Four early teleoconch whorls with slightly convex surface and feebly impressed suture represent this species. The shell has a wide selenizone in midwhorl position. Just above the suture, a swollen belt in its early form is visible; this is a frequent morphological element in Laevitomaria . The peripheral angulation of the latest whorl indicates a rather flat base.

Network ornament of sharp spiral and collabral threads covers the whorls both above and below the selenizone that bears sparse lunulae and a midwhorl thread in similar strength and density as the neighbouring belts.

Remarks – The form and the network ornament refer to an early teleoconch of an unidentifiable Laevitomaria species.

Distribution – Within Sinemurian to lowermost Pliensbachian (Lower Jurassic) part of the Hierlatz Limestone Formation in Hierlatz Alpe, Hallstatt, Austria.

Figures

Figs 131–139. Laevitomaria species.– 131–133.Laevitomaria? sp. (GBA 2018/002/0013).– 131– 132. Lateral view (×3.6 and ×1). – 133. Basal view (×3.6). – 134–136. Laevitomaria periferialis (Szabó, 1980) (GBA 2018/002/0011/01). – 134–135. Lateral view (×2 and ×1). – 136. Apertural view (×2). – 137–139. Laevitomaria sp. (GBA 2018/002/0012). – 137–138. Lateral view (×1 and ×3). – 139. Apical view (×3)