Cryptoplocus subpyramidalis ( Münster, 1844 )

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

Cryptoplocus subpyramidalis ( Münster, 1844) in Goldfuss

Plate 13: fig. 19

1855 – Nerinea pyramidalis Münster – Peters: 361, pl. 4, figs 1–3.

1882 – Cryptoplocus subpyramidalis – Schlosser: 86, pl. 12, fig. 10.

2022 – Cryptoplocus subpyramidalis (Münster in Goldfuss, 1844) – Gründel, Keupp, Lang and Nützel: 200, pl. 14, fig. 6 (here more chresonymy and synonymy).

Material.

20 specimens and fragments (19 specimens from Saal; 1 specimen Saal, location 2, level 4 (“ Fundstelle 2, Sohle 4 ”); illustrated specimen SNSB-BSPG 2016 XXI 1922 .

Remarks.

The present material is only moderately preserved. The illustrated specimen is 14 cm high. The subsutural bulge is often not visible. The apical angle of the shell varies; there may be transitions to C. depressus . Cryptoplocus pyramidalis ( Münster, 1844) in Goldfuss, sensu Wieczorek (1979) is more slender; its shell width lies approximately between C. subpyramidalis and C. depressus ( Voltz, 1836) .

Figures

Plate 13. (1) Endoplocus staszycii (Zeuschner, 1849)?, SNSB-BSPG 2016 XXI 1905, lateral view, height 27 mm. (2) Endoplocus staszycii (Zeuschner, 1849)?, SNSB-BSPG 2016 XXI 1906, tranverse section of whorl showing plaits, height 9 mm. (3, 4) Endoplocus sp. 1, SNSB, SNSB-BSPG 2016 XXI 1909, lateral view and columellar section, height 41 mm. (5, 6) Endoplocus sp. 2, SNSB-BSPG 2016 XXI 1912, (5) whorls in transverse section, height 45 mm, (6) columellar section, height 74 mm. (7, 8) Endoplocus sp. 2, SNSB-BSPG 2016 XXI 1913, lateral view and columellar section, height 74 mm. (9) Ptygmatis bruntrutana (Thurmann, 1832), SNSB-BSPG 2016 XXI 1915, lateral view, height 11 mm. (10) Ptygmatis bruntrutana (Thurmann, 1832), SNSB-BSPG 2016 XXI 1916, whorl in transverse section, height 11 mm. (11, 12) Ptygmatis clio (d’Orbigny, 1852), SNSB-BSPG 2016 XXI 1917, (11) detail of columellar section, height 36 mm, (12) lateral view, height 69 mm. (13) Ptygmatis clio (d’Orbigny, 1852), SNSB XXI 1918, 13 a) lateral view, height 60 mm, (13 b) whorl in transverse section, height 11 mm. (14, 15) Ptygmatis clio (d’Orbigny, 1852), SNSB XXI 1919, lateral views, height 45 mm. (16–18) Bactroptyxis? subcochlearis (Münster in Goldfuss, 1844), SNSB XXI 1921, (16) lateral view, height 69 mm, (17) lateral view of early whorls, height 32 mm, (18) lateral view of late whorls, height 36 mm. (19) Cryptoplocus subpyramidalis (Münster in Goldfuss, 1844), SNSB-BSPG 2016 XXI 1922, lateral view, height 142 mm.