Fig. 7From: Size distribution of the Late Devonian ammonoid Prolobites: indication for possible mass spawning eventsHistograms showing the size distribution of the four species Prolobites aktubensis Bogoslovsky 1969, Prionoceras divisum (Münster 1832), Platyclymenia annulata (Münster 1832), and Platyclymenia subnautilina (Sandberger 1855) within the Platyclymenia annulata Zone of the Kattensiepen localityBack to article page