Scurriopsis cragolis, Gründel & Nützel, 2024

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

Scurriopsis cragolis sp. nov.

Plate 1: figs 2–4

Etymology.

Arbitrary word formation.

Holotype.

SNSB – BSPG 2016 XXI 1602 (Plate 1 : figs 2–4), Sylla collection.

Paratypes.

3 specimens, SNSB – BSPG 2016 XXI 1603 –1605.

Description.

Limpet with almost straight to slightly convex sides in lateral view; distinctly longer than wide in dorsal view; outline in dorsal view oval to rounded subrectangular, slightly tapering posteriorly or anteriorly; apex distinctly decentral in direction of the tapering side of the shell; shell ornamented with numerous, densely spaced fine but distinct radial ribs and much finer co-marginal concentric threads. The holotype is 26 mm long.

Differential diagnosis.

Hennocquia saalensis Gründel et al. (2017) from the same locality and stratigraphic position is smaller, the shell is broadly elliptic in dorsal view and has distinctly convex sides in lateral view; its very weak radial ribs are confined to the anterior and posterior parts of the shell and its dominant ornament consists of strengthened growth lines. Scurria oxyconus Zittel sensu di Stefano (1884) is larger and the shell is broader in dorsal view and has more convex sides in lateral view; its apex is situated in an almost central position. Fissurella kobyi Loriol, 1890 (in Loriol and Koby) is smaller and has more convex sides in lateral view; it has fewer and stronger axial ribs, its apex has a hole as is typical for fissurellids. Dietrichella moreana ( Buvignier, 1843) sensu Gründel et al. (2020 a) has more convex sides in lateral view, is broader oval in dorsal view and lacks axial ribs.

Figures

Plate 1. (1) Patella sp., SNSB – BSPG 2016 XXI 1601, collection O. Neubauer, dorsal view, length 7 mm. (2–4) Scurriopsis cragolis sp. nov. holotype, SNSB – BSPG 2016 XXI 1602, (2–3) lateral and dorsal views, length 16 mm, (4) detail of ornament, height ca. 5.8 mm. (5–8) Scurriopsis sp., SNSB – BSPG 2016 XXI 1606, (5) dorsal view, length 8 mm, (6) detail in dorsal view, width 3.5 mm, (7–8) lateral view and detail of ornament, height 6 mm. (9–10) Pseudorhytidopilus? quadratus sp. nov., holotype, SNSB – BSPG 2016 XXI 1607, dorsal and lateral views, largest diameter 21 mm. (11) Pseudorhytidopilus? quadratus sp. nov., paratype, SNSB – BSPG 2016 XXI 1608, dorsal view, largest diameter 16 mm. (12) Leptomaria goldfussi (Sieberer, 1907), SNSB – BSPG 2016 XXI 1616, lateral view, height 25 mm. (13, 14) Leptomaria goldfussi (Sieberer, 1907), SNSB – BSPG 2016 XXI 1617, early whorls and detail of ornament, (13) height 16.5 mm, (14) height 14 mm. (15, 16) Leptomaria goldfussi (Sieberer, 1907), SNSB – BSPG 2016 XXI 1618, aperture and base, width 24 mm.