Late Jurassic (Upper Kimmeridgian) Heterobranchia (Gastropoda) of the coral-facies of Saal near Kelheim and the viciniy of Nattheim (Germany) Author Gruendel, Joachim Institut fuer Geowissenschaften, Fachrichtung Palaeontologie, Freie Universitaet Berlin, Malteserstrasse 74 - 100, 12249 Berlin, Germany joachim.gruendel@lingua-pura.de Author Keupp, Helmut Institut fuer Geowissenschaften, Fachrichtung Palaeontologie, Freie Universitaet Berlin, Malteserstrasse 74 - 100, 12249 Berlin, Germany Author Lang, Fritz Drosselweg 16, 96114 Hirschaid, Germany Author Nuetzel, Alexander https://orcid.org/0000-0002-8852-7688 SNSB-Bayerische Staatssammlung fuer Palaeontologie und Geologie, Richard-Wagner-Str. 10, 80333 Muenchen, Germany & Department of Earth and Environmental Sciences, Paleontology and Geobiology, Ludwig-Maximilians-Universitaet Muenchen, Richard-Wagner-Str. 10, 80333 Muenchen, Germany text Zitteliana 2022 2022-12-12 96 179 221 http://dx.doi.org/10.3897/zitteliana.96.e84187 journal article http://dx.doi.org/10.3897/zitteliana.96.e84187 2747-8106-96-179 35B619086E6548B09A177281C2253391 FE0861D71BB454999EE6637C0D9B2B0C Volvocylindrites marcousana (Guirand & Ogerien , 1865) Plate 21: figs 3-5 *1865 - Bulla marcousana sp. nov. - Guirand and Ogerien : 388, figs 40, 41. 1872 - Volvula marcousana Guirand et Ogerien - Loriol in Loriol, Royer and Tombeck: 72, pl. 5, fig. 8. 1886-1888 - Volvula marcousana Guirand et Ogerien - Loriol in Loriol and Bourgeat: 53, pl. 3, figs 6-9. 1893 - Volvula marcousana Guirand et Ogerien - Loriol in Loriol and Lambert: 13, pl. 1, fig. 4. 1895 - Volvocylindrites marcousanus Guir. et Oger . - Cossmann: 87, pl. 4, fig. 14. 1927 - Cylindrites extensus nov. sp. - Maire: 122, pl. 6, figs 55-57. 2012 - Volvocylindrites marcousana (Guirand and Ogerien ) - Gruendel and Nuetzel : 37, fig. 3g-h. Material. Thirty-nine mostly juvenile specimens from Saal, collection Lang, SNSB-BSPG 2021 XV 99, 100. Description. The largest specimen is 12 mm high. The shell is slender cylindrical and convolute with tapering anterior portion. The last whorl completely covers all previous ones. No ornament is visible on the whorl face except of few spiral furrows on the abapical end of the shell in some specimens (not preserved in most specimens). The aperture stretches over the entire shell height. It is narrow and only somewhat widened anteriorly. It has a columellar callus with one or possibly two plaits. Remarks. Volvocylindrites marcousana ranges from the (upper) Oxfordian to the upper Kimmeridgian according to the literature. Spiral furrows are not mentioned in published descriptions. According to the literature this species has one or two plaits on the columella. Cylindrites extensus Maire, 1927 from the upper Rauracien (= middle Oxfordian) is similar but very slender. Similar slender forms have been illustrated by Loriol in Loriol and Bourgeat (1886-1888 : pl. 3, figs 6-7) as Volvula marcousana from the upper Kimmeridgian of Valfin. These slender forms are interpreted herein as variations of V. marcousana . Plate 21. (1-2) Ptychocylindrites condati (Guirand & Ogerien , 1865), Nattheim (collection Sauerborn); (1) apical view, width 5 mm; (2) lateral view, height 12 mm. (3-5) Volvocylindrites marcousana (Guirand & Ogerien , 1865). (3) SNSB-BSPG 2021 XV 99, Saal (collection Lang), lateral view, height 5.5 mm. (4-5) SNSB-BSPG 2021 XV 100, Saal (collection Lang); (4) lateral view, height 8.8 mm; (5) aperture, height 3.2 mm. (6-7) Sulcoactaeon sp. 1, SNSB-BSPG 2021 XV 101, Saal (collection Lang), lateral views, height 3.7 mm.