Wallowiella (Plicaropsis) cancellata ( Stahl, 1824 )

Gründel, Joachim & Nützel, Alexander, 2024, Late Jurassic (Upper Kimmeridgian) gastropods from Saal near Kelheim (Germany, Bavaria), Zitteliana 98, pp. 19-72 : 19-72

Wallowiella (Plicaropsis) cancellata ( Stahl, 1824)

Plate 6 : figs 13, 14 (adult), Plate 7: figs 1, 2 (juvenile )

2015 Wallowiella (Plicaropsis) cancellata ( Stahl, 1824) – Gründel, Keupp and Lang: 88, pl. 4, figs 5–14; pl. 5, figs 1–4 (here more synonymy and chresonymy).

2016 Wallowiella (Plicaropsis) cancellata Stahl, 1824 ) – Gründel, Hostettler and Menkveld-Gfeller: 510, pl. 5, figs 5–11.

2017 Wallowiella (Plicaropsis) cancellata ( Stahl, 1824) – Gründel: 30, pl. 9 B.

Material.

Total of 27 specimens; 17 specimens from Saal; 10 specimens from Saal level 4, location 1 (“ Sohle 4, Fundstelle 1 ”); 2 specimens figured: SNSB – BSPG 2016 XXI 1773 –1774.

Remarks.

Many of the studied specimens from the Sylla collection differ from those reported by Gründel et al. (2015) by having an alternation of weak and strong spiral cords. These weaker spiral cords are, however, distinctly stronger than the lirae of Hayamiella schaeferi Gründel et al., 2015 in the same position. The nodes at the intersections of axial ribs and spiral cords are sometimes elongated like spines. The attribution of the present material to the species Wallowiella (Plicaropsis) cancellata is supported by the square pits formed by axial ribs and spiral cords on the shell and the formation of a knob on the outer lip.

Figures

Plate 6. (1, 2) Parvulatopsis? sp. 1, SNSB – BSPG 2016 XXI 1759, lateral and apical views, width 12 mm. (3) Neridomus hemisphaerica (Roemer, 1836), SNSB – BSPG 2016 XXI 1764, lateral view, width 33 mm. (4, 5) Neridomus hemisphaerica (Roemer, 1836), SNSB – BSPG 2016 XXI 651, lateral views, height 35 mm. (6, 7) Neridomus hemisphaerica (Roemer, 1836) with color pattern, SNSB – BSPG 2016 XXI 1765, lateral and apical views, width 36 mm. (8–12) Neritopsis? rotundatus sp. nov., holotype, SNSB – BSPG 2016 XXI 1767, (8–10) abapertural, apertural and apical views, width 15 mm, (11) detail in oblique apical view, width 11 mm, (12) basal view, width 15 mm. (13, 14) Wallowiella (Plicaropsis) cancellata (Stahl, 1824) (adult), SNSB – BSPG 2016 XXI 1773, lateral and basal views, width 21 mm.

Plate 7. (1, 2) Wallowiella (Plicaropsis) cancellata (Stahl, 1824) (juvenile), SNSB – BSPG 2016 XXI 1774, abapertural and apertural views, width 10 mm. (3, 4) Wallowiella (Plicaropsis) compacta Gründel, Keupp & Lang, 2015, SNSB – BSPG 2016 XXI 1775 (collection Lang), lateral and axial views, width 17 mm. (5–7) Wallowiella (Plicaropsis) compacta Gründel, Keupp & Lang, 2015, c SNSB – BSPG 2016 XXI 1776, abapertural and apertural views, width 18 mm. (8–10) Hayamiella subvaricosa (Brösamlen, 1909), SNSB – BSPG 2016 XXI 1777, abapertural, apertural and apical views, width 18 mm. (11, 12) Hayamiella? sp., SNSB – BSPG 2016 XXI 1778, abapertural and apical views, width 11 mm.