Pseudonerinea? pseudomelaniformis Gründel, Keupp, Lang & Nützel, 2022

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

Pseudonerinea? pseudomelaniformis Gründel, Keupp, Lang & Nützel, 2022

Plate 12: figs 4–6

1965 – Pseudonerinea clio (d’Orbigny) – Cox: 172, pl. 30, figs 5–6.

? 1997 – Ceritella (Fibula) cottaldina (d’Orb.) – Fischer and Weber: 31, pl. 4, fig. 10

2019 – Pseudomelania ? sp. 2 – Gründel, Keupp and Lang: 100, pl. 1, figs 7–9.

* 2022 – Pseudonerinea? pseudomelaniformis n. sp. – Gründel, Keupp, Lang and Nützel 2022: 183; pl. 2, figs 1–7.

Material.

27 specimens, illustrated specimens SNSB-BSPG 2016 XXI 1894 –1895.

Description.

Shell very slender; a specimen is 32 mm high; whorls high; whorl face straight; suture slightly impressed; transition from whorl face to base evenly rounded; whorls smooth, at least on later whorls; aperture damaged, high oval with adapical outlet and an oblique siphonal abapical canal; inner columellar lip widened and detached.

Remarks.

Many species with a similar shell shape have been described, particularly in the genus Pseudomelania . Without knowledge of the aperture (it is unknown or insufficiently known in most cases), a comparison of these species is only possible to a limited extent.

Nudivagus ? sp. 2 sensu Gründel et al. (2019) has a wider shell with lower whorls, a spiral sculpture on the whorl face, and lacks a widened and detached columellar inner lip. Ceritella (Fibula) cottaldina (d’Orbigny) as depicted by Fischer and Weber (1997) is larger according to its holotype, but shows no other significant differences. The shape of the aperture is unclear: According to d’Orbigny (1851), it is broadly rounded abapically, however according to Fischer and Weber (1997), it shows the onset of a (not preserved?) channel. If P. cottaldina has an abapical canal, then it is probably identical to P. pseudomelaniformis .

Figures

Plate 12. (1, 2) Aphanoptyxis sinerugae sp. nov., holotype, SNSB-BSPG 2016 XXI 1891, (1) lateral view, height 98 mm, (2) basal view, width 40 mm. (3) Aphanoptyxis sinerugae sp. nov., paratype, SNSB-BSPG 2016 XXI 1892, columellar section, height 32 mm. (4–5) Pseudonerinea? pseudomelaniformis Gründel, Keupp, Lang & Nützel, 2022, SNSB-BSPG 2016 XXI 1894, abapertural and apertural lateral views, height 32 mm. (6) Pseudonerinea? pseudomelaniformis Gründel, Keupp, Lang & Nützel, 2022, SNSB-BSPG 2016 XXI 1895, lateral view, height 30 mm. (7) Nerinea donosa Gründel, Keupp, Lang & Nützel, 2022, SNSB-BSPG 2016 XXI 1896, lateral view, height 18 mm. (8–10) Nerinea donosa Gründel, Keupp, Lang & Nützel, 2022, SNSB-BSPG 2016 XXI 1897, (8, 10) lateral and basal view (9) detail of last whorl in lateral view, height of shell 19.5 mm, width 8 mm. (11) Nerinea donosa Gründel, Keupp, Lang & Nützel, 2022, SNSB-BSPG 2016 XXI 1898, lateral view, height 30 mm. (12) Nerinea donosa Gründel, Keupp, Lang & Nützel, 2022, SNSB-BSPG 2016 XXI 1899, lateral view, height 26 mm. (13, 14) Nerinea donosa Gründel, Keupp, Lang & Nützel, 2022, SNSB-BSPG 2016 XXI 1900, lateral and basal view, height 37 mm, width 11 mm. (15, 16) Nerinea moreana (d’Orbigny, 1851), SNSB-BSPG 2016 XXI 1901, abaperurtal and apertural view, height 85 mm. (17, 18) Nerinea moreana (d’Orbigny, 1851)?, SNSB-BSPG 2016 XXI 1902, lateral view and columellar section, height 27 mm. (19) Endoplocus inflatus Gründel, Keupp, Lang & Nützel, 2022, SNSB-BSPG 2016 XXI 1903, lateral view, height 34 mm.