Nerinea? sp. 1

Gruendel, Joachim, Keupp, Helmut, Lang, Fritz & Nuetzel, Alexander, 2022, Late Jurassic (Upper Kimmeridgian) Heterobranchia (Gastropoda) of the coral-facies of Saal near Kelheim and the viciniy of Nattheim (Germany), Zitteliana 96, pp. 179-221 : 179

Nerinea? sp. 1

Plate 19: figs 6-8

Material.

Two incomplete specimens from Saal (one specimen collection Lang, SNSB-BSPG 2021 XV 90, one specimen collection Schäfer, SNSB-BSPG 2021 XV 91).

Description.

The larger specimen is 67 mm high. The multi-whorled shell is slender. The apical whorls are missing. The whorl height is about one third of its width. The whorl face is weakly convex to straight. The sutures are somewhat impressed. The early whorls are ornamented with 2-3 distinct spiral cords. The subsutural spiral cord is weakly knobby. Later whorls have numerous rather weak spiral cords (respectively lirae). Weak axial ribs emerge from the adapical suture and fade rapidly in an abapical direction. The base is flat with an angular transition to the whorl face. Other details are not preserved.

Remarks.

The present material is too poorly preserved and cannot be identified.

Relationships.

Ptygmatis crassa Étallon sensu Loriol in Loriol and Bourgeat (1886-1888) has higher whorls, a more distinct ramp and smaller knobs. Nerinea guirandi Loriol in Loriol & Bourgeat, 1886-1888 has higher whorls, a more distinct ramp and, at least on the early whorls, more distinct knobs. Ptygmatis guirandi Loriol sensu Cossmann (1898) has higher whorls, a more concave whorl face, and knobs are restricted to the early whorls.

Figures

Plate 19. (1 - 2) Nerinea bruntrutana Thurmann, 1832 sensu Quenstedt (1881 - 1884); University Tuebingen (collection Quenstedt), Nattheim; (1) aperture, height ca. 22 mm; (2) lateral view (original Quenstedt 1881 - 1884, pl. 206, fig. 2). (3 - 4) Nerinea mandelslohi Bronn sensu Quenstedt (1881 - 1884); (3) University Tuebingen (collection Quenstedt), Nattheim, fragment in lateral view, height ca. 31 mm (original Quenstedt 1881 - 1884, pl. 206, fig. 11). (4) University Tuebingen (collection Quenstedt), Nattheim, fragment in lateral view, height ca. 21 mm (original Quenstedt 1881 - 1884, pl. 206, fig. 12). (5) Nerinea teres (Goldfuss, 1844) sensu Quenstedt (1881 - 1884), collection University Tuebingen (collection Quenstedt), Nattheim, fragment in lateral view, height 12 mm (original to Quenstedt 1881 - 1884, pl. 206, fig. 26). (6 - 8) Nerinea? sp. 1; (6) SNSB-BSPG 2021 XV 90, Saal (collection Lang), lateral view, height 67 mm. (7 - 8) SNSB-BSPG 2021 XV 91, Saal (collection Schaefer); (7) lateral view, height 21 mm; (8) detail of ornament, width 8.5 mm. (9 - 11) Gen. et sp. Indet, SNSB-BSPG 2021 XV 92, Saal (collection Lang); (9) lateral view, height 19 mm; (10) base, width 9 mm; (11) last whorls with aperture, height 12 mm.