Swiss Journal of Geosciences

Table 1 Size classes of conch diameters as used in the text and in the Figs. 6–8

From: Size distribution of the Late Devonian ammonoid Prolobites: indication for possible mass spawning events

Size class	Max. diameter	Log diameter
1	1.3	0.1
2	1.6	0.2
3	2.0	0.3
4	2.5	0.4
5	3.1	0.5
6	3.9	0.6
7	5.0	0.7
8	6.3	0.8
9	7.8	0.9
10	10.0	1.0
11	12.5	1.1
12	15.6	1.2
13	20.0	1.3
14	25.0	1.4
15	31.3	1.5
16	40.0	1.6
17	50.0	1.7
18	62.5	1.8
19	80.0	1.9
20	100.0	2.0

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