Nudivagus? sp. 2

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

Nudivagus? sp. 2

Plate 9: fig. 18

Material.

2 specimens from Saal, SNSB-BSPG 2016 XXI 1844 –1845.

Description.

Shell high-spired, slender with high whorls; a specimen is 35 mm high; shell flanks straight; whorl face slightly convex; periphery just above abapical suture; suture distinct; whorl face covered with numerous faint spiral cords that are wider than spiral furrows in between; some furrows consist of rows of minute pits; fine ornamentation only faintly visible due to preservation; transition from whorl face to moderately convex, anomphalous base evenly rounded; no sculpture visible on base; aperture damaged, oval, pointed adapically; it is unclear whether an abapical canal was present.

Remarks.

Nudivagus sp. 1 sensu Gründel et al. (2019) has significantly lower whorls and the transition from whorl face to base has an edge. Pseudomelania valfinensis Loriol in Loriol and Bourgeat 1886–1888 is larger and more slender, the whorls are higher and the base is more convex. Pseudomelania kobyi Loriol in Loriol and Koby (1890) is taller and more slender, the whorls are higher and it lacks spiral sculpture.

Figures

Plate 9. (1, 2) Ditretus sp., cf. rostellaria (Buvignier, 1852), SNSB SNSB-BSPG 2016 XXI 1808, (1) lateral view, height 25 mm, (2) detail of ornament, height 12 mm. (3, 4) Ditretus sp., cf. rostellaria (Buvignier, 1852), SNSB-BSPG 2016 XXI 1809, lateral views, height 23 mm. (5) Cryptoptyxis? spinosus sp. nov., holotype, SSNSB-BSPG 2016 XXI 1824, apertural and abapertural lateral views, height 22 mm. (6, 7) Coninoda strekwera Gründel, Keupp & Lang, 2019, SNSB-BSPG 2016 XXI 1827, lateral view and longitudinal section, height 33 mm. (8, 9) Tropacerithium cumaritum Gründel, Keupp & Lang, 2019, SNSB-BSPG 2016 XXI 1830, (8) detail of last whorl, height 4 mm, (9) lateral view, height 7 mm. (10–12) Exelissa? aff. corallense (Buvignier, 1843), SNSB-BSPG 2016 XXI 1835, locality 1985, above coral stock, level 2 (“ Fundort 1985, über Korallenstock, Sohle 2 ”), (10) lateral view, height 12 mm, (11) apex in lateral view, height 5 mm, (12) last two whorls in lateral view, height 7 mm. (13, 14) Exelissa ursicina (Loriol in Loriol and Koby 1889), SNSB-BSPG 2016 XXI 1836, (13) l ateral view, height 10 mm, (14) basal view, width 4.5 mm. (15–17) Turritella lucagrita sp. nov., holotype, SNSB-BSPG 2016 XXI 1840, (15) lateral view, height 75 mm, (16) earliest preserved whorls in lateral view, height 40 mm, (17) last whorls in lateral view, height 46 mm. (18) Nudivagus? sp. 2, SNSB-BSPG 2016 XXI 1844, lateral view, height 35 mm. (19) Neuburgensia angulata sp. nov., paratype, SNSB-BSPG 2016 XXI 1848, collection Lang, last whorl with aperture, height 6 mm.