Maccoyoceras sp.

Korn, Dieter & Klug, Christian, 2023, Early Carboniferous coiled nautiloids from the Anti-Atlas (Morocco), European Journal of Taxonomy 885, pp. 156-194 : 170

Maccoyoceras sp.

Fig. 10

Material examined

MOROCCO • 1 specimen; Anti-Atlas, southeast of Gara el Itima , 31.5 km east-northeast of Taouz ; Zrigat Formation; Korn & Ebbighausen 2007 Coll.; MB.C.31288 .

Description

Specimen MB.C.31288 is a weathered fragment of about a quarter of a whorl of the body chamber. It belongs to a specimen with a conch diameter of about 100 mm. Shell ornament is not preserved. The conch is evolute (uw/dm is about 0.50); the whorl profile is subquadratic with a slightly concave venter, subangular ventrolateral shoulders, sinuous flanks with a broadly rounded umbilical margin and a convex dorsum ( Fig. 10 ).

Figures

Fig. 10. Maccoyoceras sp. from Gara el Itima SE. Specimen MB.C.31288 (Ebbighausen & Korn 2004 Coll.); lateral view and whorl profile. Scale bar units=1 mm.