Nerinella? subscalaris ( Muenster in Goldfuss, 1844)

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

Nerinella? subscalaris ( Muenster in Goldfuss, 1844)

Plate 15: figs 6-12

*1844 - Nerinella subscalaris Münster - Goldfuss: 41, pl. 175, fig. 12.

*v1852 - Nerinea uniplicata - Quenstedt: 429, pl. 34, fig. 22.

?1852 - Nerinea suprajurensis - Quenstedt: 429, pl. 34, fig. 24.

v part1858 - Nerinea punctata Voltz, 1836 - Quenstedt: 767, pl. 94, figs 7-9 (original of fig. 8 seen).

v1858 - Nerinea uniplicata - Quenstedt: 766, pl. 94, fig. 6.

v*1858 - Nerinea suevica - Quenstedt: 767, pl. 94, fig. 10.

v1881-1884 - Nerinea suevica Quenstedt - Quenstedt: 525, pl. 205, figs 63-64.

v1881-1884 - Nerinea uniplicata - Quenstedt: 526, pl. 205, fig. 65.

v1881-1884 - Nerinea subscalaris Goldfuss - Quenstedt: 526, pl. 205, fig. 66.

vpart1881-1884 - Nerinea punctata Bronn, 1836 - Quenstedt: 527, pl. 205, figs 69-73 (original to fig. 73 seen).

1997 - Cossmannea (Eunerinea) subscalaris ( Münster, 1844) - Hägele: 130, pl. 12, fig. 6 left, p. 130 fig. lower left.

1997 - Nerinella suevica (Quenstedt, 1858) - Hägele: 132, fig. p. 132 left middle.

Material.

Thirteen specimens from Nattheim/Rinderberg, eight of which housed at BSPG (SNSB-BSPG 2021 XV 63-70), six specimens Tübingen: collection Quenstedt).

Description.

A large specimen is 63 mm high. The shell is very slender. The whorls are high and separated by oblique sutures. They have a broad, nearly horizontal ramp that is demarcated from whorl face by a sharp edge forming the periphery. The whorl face is straight, somewhat tapering abapically. The details of the ornament are commonly obscured by poor preservation. The whorls are ornamented by a spiral cord at about mid-whorl. The originals of Quenstedt (1881-1884) show further spiral cords. The transition from whorl face to base is demarcated by a rounded bulge that is covered by the following whorl of the spire whorls. The base is moderately convex. The aperture is elongated, rhomboid with a long, almost vertical canal. The aperture has a strong parietal plait, one somewhat weaker columellar plait, and one palatal plait.

Remarks.

Quenstedt (1858) erected Nerinea constricta suevica as a subspecies separate from Nerinea suevica that was introduced in the same year and in the same publication. The latter species, Nerinea suevica , is considered to represent a synonym of Nerinella subscalaris ( Münster in Goldfuss, 1844) as is indicated in the synonymy list, whereas Nerinea constricta suevica is seen as a nomen dubium herein (see Nerinea constricta dubia Quenstedt).

Relationships.

Eunerinea sp. 1 differs from Nerinella? subscalaris by having lower whorls, a row of stronger nodes at mid-whorl, a less pronounced ramp and a more pronounced spiral cord at the transition from whorl face to base. Nerinella turriculata d’Orbigny sensu Cossmann (1898) has higher whorls in relation to their width, lacks a pronounced spiral cord at mid-whorl and also lacks a palatal plait. Nerinella jollyana d’Orbigny sensu Cossmann (1898) has four stronger and additional weak spiral cords on the whorl face. Nerinella subelegans Étallon sensu Cossmann (1898) has lower whorls and its whorl face is ornamented by alternating weak and strong spiral cords.

Figures

Plate 15. (1 - 5) Nerinella ornata (d'Orbigny, 1852). (1 - 3) SNSB-BSPG 2021 XV 72, Saal (collection Lang); (1) lateral view, height 33 mm; (2) detail of ornament, height 10 mm; (3) whorl with plait, height 3 mm. (4) University Tuebingen (collection Quenstedt), Nattheim, lateral view, height 18 mm (original Quenstedt 1881 - 1884, pl. 205, fig. 74). (5) University Tuebingen (collection Quenstedt), Nattheim, lateral view, height ca. 14 mm (original to Quenstedt 1881 - 1884, pl. 205, fig. 75). (6 - 12) Nerinella? subscalaris (Muenster in Goldfuss, 1844). (6 - 7) SNSB-BSPG 2021 XV 63, Nattheim-Rinderberg; (6) lateral view, height 64 mm; (7) last whorls with aperture, height 38 mm. (8) University Tuebingen (collection Quenstedt), Nattheim, lateral view, height ca. 40 mm (original Quenstedt 1881 - 1884, pl. 205, fig. 63). (9) University Tuebingen (collection Quenstedt), Nattheim, lateral view, height ca. 30 mm (original to Quenstedt 1881 - 1884, pl. 205, fig. 64). (10 - 11) Collection University Tuebingen (collection Quenstedt), Nattheim; (10) lateral view, height ca. 38 mm (original to Quenstedt 1881 - 1884, pl. 205, fig. 66); (11) last whorls with aperture, height ca. 20 mm. (12) Collection University Tuebingen (collection Quenstedt), Nattheim, 26 mm, lateral view, height ca. 26 mm (original Quenstedt 1881 - 1884, pl. 205, fig. 73). (13 - 15) Nerinella? sp. 1, SNSB-BSPG 2021 XV 78, Saal (collection Lang); (13) lateral view, height 43 mm; (14) whorl with plaits, width 17 mm; (15) detail of ornament, height 17 mm.