Sonninia (Papilliceras) arenata (Quenstedt, 1886)

Sandoval, José, 2022, Sonniniidae Ammonitina, Middle Jurassic from Southern Spain: taxonomic, biostratigraphical and palaeobiogeographical analysis, Geodiversitas 44 (27), pp. 801-851 : 818

Sonninia (Papilliceras) arenata (Quenstedt, 1886) [M] ( Fig. 9C )

Ammonites arenatus Quenstedt, 1886: 482-484 , pl. 60, fig. 10 (HT).

Prepapillites arenatus – Buckman 1927: pl. 709.

Sonninia arenata – Dorn 1935: 38, pl. 7, fig. 1 (HT refigured), text-fig. pl. 3, figs 3, 4. — Schlegelmilch 1985: 60, pl. 16, fig. 4 (HT refigured).

Papilliceras arenatum – Maubeuge 1951: 49, pl. 3, fig. 2. — Sadki 1996: 175, pl. 5, fig. 1.

Sonninia patella arenata – Oechsle 1958: 102, pl. 12, fig. 10.

? Sonninia (Papilliceras) cf. S. (P.) arenata – Imlay 1964: B34, pl. 6, figs 1-3. — Imlay 1973: 68, pl. 26, fig. 11.

Sonninia (Papilliceras) arenata – Morton 1973: pl. 18, fig. 3; 1975: 73, pl. 11, figs 1, 2, pl. 12, figs 1, 2.

MATERIAL EXAMINED. — A.9.9.2.2-1.

REMARKS

The only available specimen is a BC fragment of a mediumsized specimen in which the coiling and the subrectangular whorl section, with gently convex flanks and ventral area with a high hollow keel, coincide with the HT of Papilliceras arenatum . The ornamentation consists of concave faint ridgeshaped ribs that end in the mid-lateral-tubercles.

DISTRIBUTION

According to Dietze et al. (2005: 23), the type horizon of Ammonites arenatus Quenstedt, 1886 lies in the Sauzei Zone. In Scotland, S. (P.) arenata is common in the Sauzei Zone ( Morton 1973, 1975), while in Morocco it occurs near the Laeviuscula-Propinquans boundary ( Sadki 1996). In Somerset-Dorset ( England), the S. micracanthica-arenata assemblage is from the Laeviuscula Zone ( Chandler et al. 2006: 366; Dietze et al. (2007: 12). In south-western Germany S. (P.) arenata appears from upper Laeviuscula and lower Sauzei (Propinquans) Zone ( Dietze et al. (2008, 2009, 2011b). The exact beds of the sole Subbetic specimen (collected by J.M. Tavera), from La Torquilla (Sierra Alta Coloma area), are not known, but the lithology is characteristic of the uppermost Laeviuscula Zone or lowermost Propinquans Zone.

Figures

FIG. 9. — A, Sonninia (Sonninia) schlumbergeri Haug, 1893 [m], JAC4.39.10,Laeviuscula Zone,Sierra de Alta Coloma (JAC4 section); B, Sonninia (Euhoploceras) nannomorpha (Buckman, 1923), n. comb. ([m], JAC22.5.9, Ovale Zone, Sierra de Alta Coloma (JAC22 section); C, Sonninia (Papilliceras) arenata (Quenstedt, 1886) [M], A.9.9.2.2-1, Propinquans Zone?, Sierra de Alta Coloma; D, Sonninia (Papilliceras?) sp. [M], JAC22.6.13, Ovale Zone, Sierra de Alta Coloma (JAC22