Fig. 5
From: The oldest ammonoids of Morocco (Tafilalt, lower Emsian)
Praechebbites debaetsi n. gen. n. sp. a, b Corroded paratype PIMUZ 36652, lateral and ventral views, showing regular ribbing on the flattened venter at ca. 50 mm dm, ×1. c, d Poorly preserved paratype PIMUZ 36653, ventral and lateral views, showing regularly-spaced, convex flank ribbing, ×1.5. e, f Corroded paratype PIMUZ 36651, ventral and lateral views, showing traces of ribbing on the flattened venter and advolute coiling at maturity (dm almost 100 mm), ×1