Acutitomaria woehrmanni ( Koken, 1896 ) Nützel & Karapunar, 2023

Nützel, Alexander & Karapunar, Baran, 2023, On Triassic Murchisonia-like gastropods-surviving the end-Permian extinction to become extinct in the Late Triassic, Acta Palaeontologica Polonica 68 (3), pp. 539-559 : 554

Acutitomaria woehrmanni ( Koken, 1896) comb. nov.

Fig. 12 .

1896 Pseudomurchisonia woehrmanni Koken ; Koken 1896: 87, fig. 13.

1897 Pseudomurchisonia woehrmanni Koken ; Koken 1897: 106, fig. 30, pl. 6: 3.

2021 Pseudomurchisonia woehrmanni Koken ; Karapunar and Nützel 2021: 51.

Material.—Four fragments from the GBA, three of which were photographed and might represent Koken’s (1896) illustrated type specimen that is broken ( GBA 1897/003/0001). The label says “Unterer Rötelstein”, in the publications ( Koken 1896, 1897), the Feuerkogel is given as locality. GBA 1897/003/0001 is designated herein as lectotype.

Description.—Shell moderately high-spired, apical angle ca. 60°; early whorls not well-preserved but earliest whorls seem low trochospiral; whorls distinctly convex, ornamented with strong, densely spaced axial ribs and few spiral cords; axial ribs become knobby when crossing spiral cords in lower part of whorls; axial ribs become visible on third whorl where they are straight prosocline; selenizone appears within 4 th whorl, high on whorl face, flush to slightly concave with strong lunulae; in addition, selenizone has a fine ornament of converging spiral threads (so far unknown from this species); base convex with strong spiral cords and axial ribs with small and axially elongated nodes at intersections.

Stratigraphic and geographic range.—Carnian (Upper Triassic), Austria.

Figures

Fig. 12. Pleurotomariid vetigastropod Acutitomaria woehrmanni (Koken, 1896) “Unterer Rötelstein”, according to Koken (1896, 1897), Feuerkogel,Austria is given as locality. A. GBA 1897/003/0001, fragmented lectotype, early whorls in lateral view (A1), detail of whorl face in lateral view showing ornament, selenizone with lunulae and converging micro-ornament (A2), early whorls in oblique lateral (A3) and apical (A4) views, last whorl in lateral views (A5,A6).