Stroborineceras sp.

Korn, Dieter & Bockwinkel, Jürgen, 2022, Early Carboniferous nautiloids from the Central Sahara, southern Algeria, European Journal of Taxonomy 831, pp. 67-108 : 79

Stroborineceras sp.

Fig. 9 , Table 4

Material examined

ALGERIA • 1 specimen; Sebkha de Timimoun 11 km south-west of Timimoun (locality TIM-B0); Grès de Kahla supérieur (Upper Pericyclus-Progoniatites Assemblage; early late Tournaisian); Korn et al. 2002 Coll.; illustrated in Fig. 9 ; MB.C.30455 • 6 specimens; Mouydir , south of Oued Temertasset (localities MOU-X, MOU-Y); Argiles de Teguentour (Upper Pericyclus-Progoniatites Assemblage; early late Tournaisian); Korn et al. 2002 Coll.; MB.C.30456.1 – MB.C.30456.5 , MB.C.30457 .

Description

Specimen MB.C.30455 is a 30 mm diameter phragmocone partially embedded in a haematite nodule ( Fig. 9A ). About half a whorl is recognisable, though some of it is damaged. The whorl profile is depressed and rectangular with a flat venter, angular ventrolateral shoulder and parallel flanks. On the flank there are four spiral lines of slightly different strength. The suture line shows a broadly rounded external lobe and a broadly rounded lateral lobe ( Fig. 9B ).

Figures

Fig. 9. Stroborineceras sp. from Oued Temertasset, specimen MB.C.30455 (Korn et al. 2002 Coll.). A. Lateral and ventral views. B. Suture line, at ww =9.4 mm, wh =6.6 mm. Scale bar units =1 mm.