Data plotted here is from DINOSTRAT, available via Zenodo: DOI: 10.5281/zenodo.7791273. Please cite Bijl, 2022 https://doi.org/10.5194/essd-14-579-2022 when using this data.


Plots are based on the following information

Location	Taxon	Source	Calibration	Age (Ma)	Paleolatitude
Vega	Valensiella ovulum	Århus et al., 1989	0.05 in amm_b_Peltoceras athleta	162.887	53.476862168749996
Arctic Basin	Valensiella dictydia	Bujak et al., 2022	0.75 in amm_b_Procerites hodsoni	165.8	73.09372428571429
Arctic Basin	Valensiella ovulum	Bujak et al., 2022	0 in amm_b_Kosmoceras jason	163.47	73.32359542857142
Arctic Basin	Valensiella dictydia	Bujak et al., 2022	0 in amm_b_Quenstedtoceras mariae	161.53	73.51499028571428
Cabo Mondego	Valensiella ovulum	Correia et al., 2019	0 in amm_t_Parkinsonia parkinsoni	168.72	30.729761466666666
Calvados	Valensiella ovulum	Feist-Burkhardt and Monteil, 1997	0.75 in amm_b_Stephanoceras humphriesianum	169.82750000000001	35.923743825
Calvados	Valensiella ovulum	Feist-Burkhardt and Monteil, 1997	0.7 in amm_b_Zigzagiceras zigzag	167.32999999999998	36.0245679
Scotian Margin	Valensiella spp.	Williams et al., 1993	0.15 in stage_Aalenian	174.13	27.97299761
Scotian Margin	Valensiella spp.	Williams et al., 1993	0.2 in stage_Kimmeridgian	153.672	32.56701598666667
534	Valensiella ovulum	Habib and Drugg, 1983	1 in mag_M24n	150.85309044515594	20.72729161125621
Australia Synthesis	Valensiella delicata	Helby et al., 1987	0.8 in stage_Berriassian	138.78	-64.70852477777778
Australia Synthesis	Valensiella delicata	Helby et al., 1987	0.5 in stage_Tithonian	146.17000000000002	-62.010641055555546
Denmark3	Valensiella spp.	Poulsen and Riding, 2003 sensu Riding et al., 2010	0.4 in stage_Bajocian	169.808	44.93928006857143
Czestochowa	Valensiella ovulum	Poulsen, 1998	0.5 in amm_b_Sigaloceras calloviense	163.67000000000002	41.60991826666667
Caucasus	Valensiella ovulum	Smelror and Lominadze, 1989	1 in amm_b_Proplanulites koenigi	163.87	37.64025
Figueira Da Foz	Valensiella dictydia	Smelror et al., 1991	0.4 in amm_t_Bullatimorphites bullatus	165.046	31.077953486
Milne Land	Valensiella dictydia	Smelror, 1988a	0 in amm_b_Cardioceras cordatum	159.66	50.980530275
Milne Land	Valensiella ovulum	Smelror, 1988a	0 in amm_b_Clydoniceras discus	165.5	50.509439375
Milne Land	Valensiella ampulla	Smelror, 1988a	0.5 in amm_b_Macrocephalites herveyi	164.945	50.55420914375
Milne Land	Valensiella vermiculata	Smelror, 1988a	1 in amm_b_Oxycerites orbis	165.5	50.509439375
Milne Land	Valensiella ovulum	Smelror, 1988a	0.75 in amm_b_Peltoceras athleta	162.565	50.74619481875
Milne Land	Valensiella ampulla	Smelror, 1988a	1 in amm_b_Proplanulites koenigi	163.87	50.6409253625
Milne Land	Valensiella vermiculata	Smelror, 1988a	0.5 in amm_b_Proplanulites koenigi	164.235	50.61148218125
Milne Land	Valensiella dictydia	Smelror, 1988a	0.5 in amm_b_Sigaloceras calloviense	163.67000000000002	50.6570586125
Kong Karls Land	Valensiella dictydia	Smelror, 1988b	0.5 between 0 amm_b_Quenstedtoceras lamberti 1 amm_b_Quenstedtoceras mariae	161.055	67.01490723214286
Kong Karls Land	Valensiella ovulum	Smelror, 1988b	0.7 between 0 amm_b_Macrocephalites herveyi 1 amm_b_Peltoceras athleta	163.302	66.73607860714286
Barentz Sea	Valensiella dictydia	Smelror, 1994	0.5 in stage_Bathonian	166.73	64.86844562142858
Barentz Sea	Valensiella dictydia	Smelror, 1994	0 in stage_Oxfordian	161.53	65.42403219285714
Dorset-Yorkshire	Valensiella spp.	Woollam and Riding, 1983	0 in amm_b_Garantiana garantiana	169.27	38.1586258
North Sea Basin	Valensiella ampulla	Copestake and Partington, 2023	1 in amm_b_Oxycerites orbis	165.5	43.09549142857143
North Sea Basin	Valensiella vermiculata	Copestake and Partington, 2023	0.25 in amm_b_Macrocephalites herveyi	165.1175	43.110438435714286

Histogram