Brachytrematidae? gen. and sp. indet.

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

Brachytrematidae? gen. and sp. indet.

Plate 8: fig. 5

Material.

1 specimen, Saal, SNSB-BSPG 2016 XXI 1781 .

Description.

Shell turbiniform, 29 mm high, only partly preserved; whorls convex with numerous spiral cords and widely spaced axial ribs; first recognizable sculpture consists of edge directly above abapical suture; several weak spiral cords and axial ribs between edge and abapical suture; in the course of ontogeny, a spiral cord above edge and a weakly tubercular spiral cord appears between both; several spiral cords between edge and abapical suture; axial ribs become bulging and form rounded nodes at intersections with edge and several spiral cords on both sides of edge; adapical end of ribs thickened, node-like; some axial ribs thickened, varix-like; faint spiral lirae (that cannot be seen in detail due to preservation) between adapical suture and edge; spiral cord at border to base nodular; base slightly convex, with remains of spiral cords but shell largely chipped off so that only steinkern is exposed there.

Figures

Plate 8. (1) Saalensia birugata Gründel, Keupp & Lang, 2019, SNSB-BSPG 2016 XXI 1779, lateral view, height 16 mm. (2–4) Loriolotrema sp., SNSB-BSPG 2016 XXI 1780, apertural, apical and basal view, width 18 mm. (5) Brachytrematidae? gen. and sp. indet., SNSB-BSPG 2016 XXI 1781, abapertural view, height 29 mm. (6, 7) Oonia kimmeridgiensis sp. nov., holotype, SNSB-BSPG 2016 XXI 1791, apertural and abapertural, height 18 mm. (8, 9) Globularia? sp., SNSB-BSPG 2016 XXI 1794, abapertural and oblique lateral view, width 42 mm. (10, 11) Pictavia? sp., SNSB-BSPG 2016 XXI 1790, abapertural and oblique abapertural view, height 20 mm. (12) Eustoma sp., SNSB-BSPG 2016 XXI 1801, apertural view, height 24 mm. (13, 14) Eustoma sp., SNSB-BSPG 2016 XXI 1802, (13) lateral view, height 31 mm, (14) basal view, width 10 mm. (15–17) Eustoma? gracilis sp. nov., holotype, SNSB-BSPG 2016 XXI 1804, (15–16) basal and lateral view, width 18 mm, (17) detail of ornament of last whorl, height 15 mm.