Sonninites sulcatus ( Buckman, 1889 ) Sandoval, 2022

Sandoval, José, 2022, Sonniniidae Ammonitina, Middle Jurassic from Southern Spain: taxonomic, biostratigraphical and palaeobiogeographical analysis, Geodiversitas 44 (27), pp. 801-851 : 821-822

Sonninites sulcatus ( Buckman, 1889) , n. comb. [m] ( Fig. 9 H-J)

Lillia sulcata Buckman, 1889: 109 , pl. 22, figs 32, 33, pl. 33, fig. 1 (LT here designated).

Sonninia sulcata – Haug 1893: 290, text-fig. 5, pl. 9, figs 1-3, pl. 10, fig. 9.

Sonninia deltafalcata – Haug 1893: 293, pl. 9, fig. 8 (non figs 5, 9).

Pelekodites sulcatus – Pavia 1983: 60, pl. 5, figs 4, 5. — Sandoval 1990: 147, pl. 2, fig. 2.

Pelekodites sp. – Pavia 1983: 60, pl. 5, figs 6, 7.

Maceratites sulcatus “sensu” Haug 1893 – Fernández-López 1985: 107, pl. 10, fig. 12.

Pelekodites sulcatus [m] – Dietze et al. 2009: 27, pl. 4, fig. 4.

MATERIAL EXAMINED. — JAC3.60.1 , JAC3.60.2 , JAC3.83.2 , JAC3.89.1 , JAC3’.8.1 , JAC3’.15.1 , JAC11.8.30 , JAC11.8.32 , JAC4.54.1 , JAC21.(14-8).1 , JAC21.17.6 , JAC21.18.6 JAC21.25.1 , JAC21. R.1 , JAQ 1.8.1 and APM.71 .

MEASUREMENTS. — See Table 10.

DESCRIPTION

Small shells, moderately evolute coiling (U/D varying from 0.33 to 0.37 in the Subbetic specimens and is 0.39 in the specimen figured by Buckman [1888: pl. 22, figs 32, 33]; LT here designated). The whorl section is suboval with convex flanks in the inner and intermediate whorls, becoming compressed subrectangular with almost flat flanks and a wide, rounded ventral area in the adult BC. The wide venter has a low keel bordered by wide grooves throughout the PH that fade progressively in the BC and disappear near the adult peristome, which bears well-developed lateral apophyses and a small ventral rostrum. In the inner whorls, flexuous, subradial, simple or paired ribs end in a small tubercle near the umbilical seam. In the middle whorls, the ribs become more proverse and generally become paired in a thickening near the umbilical edge. In the adult BC, the ribs attenuate, mainly in the middle part of the flanks, where they can almost disappear. The septal suture is not well preserved in the Subbetic specimens.

REMARKS

The Subbetic specimens differ from the HT in being slightly smaller, having a more compressed whorl section, and being somewhat more involute. However, they coincide well with the specimens figured by Haug (1893), Pavia (1983, especially with the specimens nominated as Pelekodites sp. ), Fernández-López (1985), and by Dietze et al. (2009). Sonninites sulcatus n. comb. [m] occurs frequently in the same beds as Sonninites felix [M], suggesting that the two taxa may be a dimorphic pair.

DISTRIBUTION

According to Buckman (1889: 109) the type of “ Lillia sulcata ” comes from the Humphriesianum Zone of Bradford Abbas (Dorset, England). The specimens figured by Haug (1893) are from the Sauzei Zone (Bayeux and Nancy, France). In the Digne area of south-eastern France, “ P. ” sulcatus occurs in the Propinquans Zone ( Pavia 1983). In the Iberian Range ( Spain), this species appears in the Humphriesianum Zone, in a presumably reworked material (Fernández-López 1985). In Kahlenberg, near Ringsheim, Upper Rhine Valley (SW Germany), “ P. ” sulcatus occurs in the upper part of the Sauzei Zone (Propinquans Zone, Hebridica Subzone; Dietze et al. 2009, 2011b). In the Subbetic, Sonninites sulcatus n. comb. is relatively common in the Propinquans Zone but rarer in the Laeviuscula Subzone, from some Median Subbetic sections of Sierra de Alta Coloma area (Granada and Jaén Provinces).

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