Table 1. Age, locality, size, and diversity of studied samples from the Cassian Formation.

Samples from Lago Antorno, Misurina landslide, Settsass, and Stuores are from previous studies (Hausmann et al., 2019, unpublished data; Nützel & Kaim, 2014; Hausmann & Nützel, 2015). See ‘Methods’ for applied measures. Indices based on 10 most abundant species per sample. PPD = pairwise proportional dissimilarity. Mean PPD with regard to other samples. Inferred relative water depth is based on ranking detailed in Table S1: Positive values refer to deeper settings, negative values to shallower settings.

Locality	Stratigraphic age (ammonite biozone, substage)	Coordinates		Reference	No. of specimens	Berger-Parker dominance index	Evenness	Mean PPD	Inferred relative water depth rank
Costalaresc	austriacum, Julian	46.53995N	12.16390E	This study	315	0.73	0.29	0.91 ± 0.04	−1
Lago Antorno	probably austriacum, Julian	46.59438N	12.26100E	Hausmann et al. (2019, unpublished data)	216	0.31	0.50	0.88 ± 0.06	−4.5
Misurina landslide	probably austriacum, Julian	46.59490N	12.25962E	Hausmann et al. (2019, unpublished data)	558	0.30	0.48	0.89 ± 0.06	−2
Picolbach	aon, Julian	46.53427N	11.92253E	This study	213	0.28	0.54	0.92 ± 0.04	4
Rumerlo cliff	probably aonoides, Julian	46.53375N	12.09882E	This study	229	0.22	0.54	0.91 ± 0.04	−4
Rumerlo ski slope	aonoides, Julian	46.53684N	12.10214E	This study	33	0.21	0.58	0.93 ± 0.05	−5
Settsass	aon, ”Cordevolian”	46.51733N	11.95846E	Nützel & Kaim (2014)	296	0.24	0.50	0.91 ± 0.04	2
Stuores	aon, ”Cordevolian”	46.52872 N	11.93672E	Hausmann & Nützel (2015)	1026	0.33	0.53	0.95 ± 0.02	−6