Temnocheilus sp.

Korn, Dieter & Klug, Christian, 2023, Early Carboniferous coiled nautiloids from the Anti-Atlas (Morocco), European Journal of Taxonomy 885, pp. 156-194 : 166

Temnocheilus sp.

Fig. 8

Material examined

MOROCCO • 1 specimen; Anti-Atlas, region south-west of Rissani ; basal Mougoui Ayoun Formation; Karaoui Coll.; PIMUZ 39516 .

Description

The fragmentary specimen PIMUZ 39516 has a conch diameter of 80 mm ( Fig. 8A ). It shows the coronate, strongly depressed whorl profile (ww/wh ~1.80), the flat area of flank and umbilical wall, the narrowly rounded ventrolateral shoulder and the flattened but convex venter ( Fig. 8B ). The ventrolateral shoulder is decorated with about 10 rounded tubercles on half a volution. The internal suture line possesses a deep, V-shaped rectangular internal lobe ( Fig. 8C ) caused by an inflexion of the strongly concave septum.

Figures

Fig. 8. Temnocheilus sp.; specimen PIMUZ 39516 (Karaoui Coll.) from south-east of Rissani. A. Lateral view. B. Whorl profile. C. Suture line, at ww ~43 mm, wh ~ 23 mm. Scale bar units =1 mm.