Witchellia sayni Haug, 1893

Sandoval, José, 2022, Sonniniidae Ammonitina, Middle Jurassic from Southern Spain: taxonomic, biostratigraphical and palaeobiogeographical analysis, Geodiversitas 44 (27), pp. 801-851 : 832

Witchellia sayni Haug, 1893 [M]

( Fig. 13B )

Witchellia sayni Haug, 1893: 308 .

Ludwigia corrugata – Douvillé 1885: 26, pl. 2, figs 1 (LT designed by Dietze et al. 2007) to fig. 5, pl. 3, figs 1, 2, text-figs 6, 7.

Witchellia cf. sayni – Pavia 1983: pl. 4, fig. 2.

Witchellia sayni – Fernández-López 1985: 74, text-fig. 8J, pl. 5, fig.3. — Fernández-López et al. 1988: 312, pl. 1, fig.5. — Hernández-Molina et al. 1991: fig. 13.5. — Sadki 1996: 172, pl. 4, fig. 3. — Dietze et al. 2007: 13, pl. 6, figs 1a, b (LT refigured). — Galácz et al. 2015: 10, pl. 3, fig. 3. — Chandler & Whicher 2015: pl. 19, fig. 1.

non Witchellia sayni – Sandoval 1990: 146, pl. 1, fig. 5.

MATERIAL EXAMINED. — JAC3. R.6 , JAC4.37.1 , JAC11.(4-7).1 , JAC11.3a’.3 , JAC11. R.24 , JAC22.4.1 , JFA.14.16 and JFA.(14-16).1 .

MEASUREMENTS. — See Table 17.

DESCRIPTION

Medium to large macroconchs, relatively evolute (U/D varying between 0.35 and 0.37 in the available specimens). The ovate to subrectangular compressed whorl section has an almost vertical umbilical wall and a rounded umbilical edge, flat to gently convex flanks, and has a venter with a high keel. The innermost whorls are not preserved and the dense intermediate whorl ribs arise near the umbilical edge, where some may be grouped. Subsequently, the ribs, mainly simple, are radial or slightly proverse in the lower two thirds of the flank and bend forward in the upper third, being erased near the keel. In the BC, the ribs fade somewhat, but are not erased. The aperture and septal suture is not preserved in the Subbetic specimens.

REMARKS

The Subbetic specimens strongly resemble the LT of the species, mainly in the coiling, whorl section, and ribbing, but are smaller and lack or barely have a tabulated ventral area.

DISTRIBUTION

The exact stratigraphic situation of the type of W. sayni , which is from ‘couche ocreuse, Ovale Zone? of the Vallée de Valaury’ (S. France) remains uncertain (see Dietze et al. 2007: 34). The species has been cited from the Ovale and Laeviuscula zones in France ( Douvillé 1885; Haug 1893; Gillet 1937; Pavia 1983; De Baets et al. 2008); England ( Chandler et al. 2006, 2014; Chandler & Whicher 2015); Germany ( Dietze et al. 2007); Hungary ( Galácz et al. 2015); Spain, both in the Iberian Cordillera (Fernández-López 1985; Fernández-López et al. 1988) and in the Subbetic basin ( Sandoval 1983, 1990; Hernández-Molina et al. 1991); and Morocco ( Sadki 1994, 1996). The stratigraphic range of the species is probably restricted to the interval compressed between the Ovale Zone and Laeviuscula Zone (Trigonalis Subzone).

Figures

FIG. 13. — A, Witchellia hyalina (Buckman, 1924) [M], JAC11.8.21, Propinquans Zone,Patella Subzone, Sierra de Alta Coloma (JAC11 section); B, Witchellia sayni Haug, 1893 [M], JAC11.(4-7).1, Laeviuscula Zone?, Sierra de Alta Coloma (JAC11 section); C, Witchellia laeviuscula (J. de C. Sowerby, 1824) [M], JAC3.71.2, Laeviuscula Subzone, Sierra de Alta Coloma (JAC3 section); D-F, Witchellia companyi n. sp. [M], JAC11.8.16 (HT), JAC11.8.22, JAC11.8.14, Propinquans Zone, Patella Subzone, Sierra de Alta Coloma (JAC11 section); G, H, Witchellia striata n. sp. [M]; G, JAC11.4.27 (HT), Laeviuscula Zone, Trigonalis Subzone, Sierra de Alta Coloma (JAC11 section); H, JAC4.36.1, Laeviuscula Zone, Sierra de Alta Coloma (JAC4 section). Scale bar: 1 cm.