Wortheniopsis margarethae ( Kittl, 1894 )

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 : 553-554

Wortheniopsis margarethae ( Kittl, 1894)

Fig. 9 .

1894 Pleurotomaria margarethae Kittl n.f.; Kittl 1894: 114, pl. 6: 1–3. 1895 Wortheniopsis margarethae Kittl sp.; Böhm 1895: 220, text-fig.

6; pl. 14: 24.

Material.— Two specimens, NHMW 1884 /0006/0872/1, 2, from the Anisian (Middle Triassic), Marmolada Limestone, Italy .

Description.—Shell moderately high-spired, acutely conical, with four preserved whorls (earlier whorls missing), 15 mm high, 10 mm wide; whorls high, with convex to slightly angulated profile and incised suture; whorls above sinus steeply sloping, with prosocline growth lines and faint subsutural spiral cords; sinus situated on faint angulation, high on whorl face; whorl face below sinus with prosocyrt growth lines and wide, faint spiral bands; transition to base rounded; base anomphalous, ornamented with wide imbricated spiral bands.

Remarks.—The specimens placed in Wortheniopsis quirini Stoppani, 1860 ) by Kittl (1899) are figured herein ( Fig. 10 ). Their whorls are more angulated, and although poorly preserved, they show the characteristic imbricated spiral bands.

Stratigraphic and geographic range.—Ladinian (Middle Triassic), Marmolada, Italy.

Triassic gastropods erroneously identified as Murchisonia -like gastropods

Figures

Fig. 9. Goniasmatid? caenogastropod Wortheniopsis margarethae (Kittl, 1894), Ladinian, Marmolada Limestone, Italy. A. NHMW 1884/0006/0872/1, in lateral (A1) and apertural (A3) views, detail of last preserved whorl in lateral view (A2) to show growth lines (course indicated with dashed line). B. NHMW 1884/0006/0872/2, in lateral view (B1), detail of last preserved whorl in lateral view (B2).

Fig. 10. Goniasmatid? caenogastropod Wortheniopsis quirini (Stoppani, 1860), Ladinian, Marmolada Limestone, Italy. A. NHMW 1969/1102/0000/1, original of Koken (1899, pl. 1: 14), in lateral view (A1), detail of last preserved whorl in lateral view (A2). B. NHMW 1969/1102/0000/2, original of Koken (1899: pl. 1: 15), in lateral view (B1), detail of last preserved whorl in lateral view (B2). C. NHMW 2019/0177/0020, juvenile specimen, in lateral (C1) and oblique lateral (C2) views.