Endoplocus staszycii ( Zeuschner, 1849 )

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

Endoplocus staszycii ( Zeuschner, 1849) ?

Plate 13: figs 1, 2

? 1850 – Actaeon staszycii n. sp. – Zeuschner: 130, pl. 17, figs 16–19.

1855 – Nerinea staszycii Zeuschner – Peters: 350, Tas. 2, figs 6–9.

1870 – Nerinea staszycii Zeuschner – Gemmellaro: 16, pl. 3, figs 8–10.

1998 – Endoplocus staszycii ( Zeuschner, 1849) – Wieczorek: 319, pl. 2, figs 4–6 (here more chresonymy and synonymy).

Material.

4 specimens, SNSB-BSPG 2016 XXI 1905 –1908.

Description.

Shell stout with egg-shaped outline, consisting of few whorls; largest specimen 27 mm high; body whorl higher than the spire; whorl face weakly convex; whorls relatively high, smooth; sutures marked by a narrow ramp; transition from whorl face to base evenly rounded; base strongly convex, smooth; aperture not preserved; 2 (3?) columellar and palatal plaites as well as a parietal plait visible in longitudinal section.

Remarks.

According to Peters (1855), Nerinea staszycii Zeuschner, 1850 is a very variable species. The specimens illustrated by Peters (1855, pl. 2: figs 6–9) correspond to the present material assigned to this species. Actaeon staszycii Zeuschner, 1850 is more slender, the spire is higher and it has more whorls. Itieria austriaca Zittel, 1873 has a subsutural row of nodes. Nerinea staszycii Zeuschner sensu Gemmellaro (1870) has a lower last whorl in relation to the spire height and the shell is more slender. Phaneroptyxis simmenensis Ooster sensu Cossmann (1898) is more slender and its body whorl is more cylindrical.

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.