Ptychocylindrites condati (Guirand & Ogerien , 1865)

Gruendel, Joachim, Keupp, Helmut, Lang, Fritz & Nuetzel, Alexander, 2022, Late Jurassic (Upper Kimmeridgian) Heterobranchia (Gastropoda) of the coral-facies of Saal near Kelheim and the viciniy of Nattheim (Germany), Zitteliana 96, pp. 179-221 : 179

Ptychocylindrites condati (Guirand & Ogerien, 1865)

Plate 21: figs 1, 2

* 1865 - Bulla condati sp. nov. - Guirand and Ogérien: 388, figs 38, 39.

1886-1888 - Cylindrites condati Guirand and Ogérien - Loriol in Loriol and Bourgeat: 51, pl. 3, figs 4, 5.

non 1893 - Cylindrites condati Guirand and Ogérien - Greppin: 26, pl. 3, fig. 9.

1895 - Ptychocylindrites condati Guir. et Ogér. - Cossmann: 89, pl. 4, figs 28-32.

1895 - Ptychocylindrites condati (Guir. et Og). - Cossmann: 72, pl. 3, figs 4-6.

1917 - Ptychocylindrites caudati Cossmann - Nalivkin and Akimov: 41, pl. 3, fig. 27.

1997 - Cylindrites (Ptychocylindrites) condati (Guirand & Ogérien, 1865) - Hägele: 120, fig. p. 121 upper right.

2012 - Ptychocylindrites condati (Guirand & Ogérien, 1865) - Gründel and Nützel: 37, fig. 3 d-f.

Material.

One specimen from the Nattheim area (collection Sauerborn).

Description.

The specimen is 13 mm high. The shell is slender, fusiforme and convolute with weakly convex flanks. The apex is blunt. The last whorl covers all previous ones in lateral view. Some of the earlier whorls can be seen in apical view. The adapical portion of the last whorl is bulging and possibly knobby (uncertain due to poor preservation). This portion of the shell is narrower than the portion below it and is demarcated by a shallow furrow. No ornament is visible. The damaged aperture stretches from the adapical furrow to the base. It is very narrow and somewhat broadened at its abapical termination. The columella has two strong plaits.

Remarks.

Seemingly, only the type species Ptychocylindrites condati can be assigned to the genus Ptychocylindrites with certainty. It ranges from the Oxfordian to the Kimmeridgian according to the literature. It seems unclear whether this species was long-lived or several species have been identified as this taxon. Cylindrites condati sensu Greppin (1893) does not belong to this species. If Greppin’s (1893) illustration is accurate, then this specimen represents a much slenderer, probably undescribed species. Tornatellina corallina sensu Quenstedt (1881-1884) differs significantly from Ptychocylindrites condati . It is slenderer and lacks a bulging adapical portion of the last whorl.

Figures

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.