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
Kimmeridge Clay N Yorkshire	Kalyptea stegasta	Bailey et al., 1997	0.25 in amm_b_Pectinatites pectinatus	147.21	NA
North Sea Compilation	Kalyptea stegasta	Riding and Thomas, 1992	0 in amm_b_Garantiana garantiana	169.27	39.82651615
North Sea Compilation	Kalyptea stegasta	Riding and Thomas, 1992	1 in amm_b_Pavlovia pallasioides	146.27	39.4097627
Calvados	Kalyptea stegasta	Feist-Burkhardt and Monteil, 1997	1 in amm_b_Witchellia laeviuscula	170.32	35.9038616
Calvados	Kalyptea stegasta	Feist-Burkhardt and Monteil, 1997	1 in amm_b_Zigzagiceras zigzag	166.97	36.0391011
Hausen	Kalyptea stegasta	Feist-Burkhardt, 1990	0.1 in amm_b_Sonninia propinquans	170.297	37.7592792375
Australia Synthesis	Kalyptea wisemaniae	Helby et al., 1987	0.33 in stage_Berriassian	141.31799999999998	-63.78197147777778
Australia Synthesis	Kalyptea wisemaniae	Helby et al., 1987	0.8 in stage_Tithonian	144.328	-62.68310408888889
Czestochowa	Kalyptea diceras	Poulsen, 1998	0.9 in amm_t_Procerites aurigerus	167.03	42.020331066666664
Czestochowa	Kalyptea stegasta	Poulsen, 1998	0.9 in amm_t_Procerites aurigerus	167.03	42.020331066666664
Isle of Skye	Kalyptea stegasta	Riding and Thomas, 1997	0.75 in amm_b_Macrocephalites herveyi	164.77249999999998	43.064812025
Isle of Skye	Kalyptea stegasta	Riding and Thomas, 1997	0 in amm_b_Peltoceras athleta	162.91	43.28297078888889
Figueira Da Foz	Kalyptea stegasta	Smelror et al., 1991	0.4 in amm_t_Bullatimorphites bullatus	165.046	31.077953486
Kong Karls Land	Kalyptea diceras	Smelror, 1988b	0.5 between 0 amm_b_Quenstedtoceras lamberti 1 amm_b_Quenstedtoceras mariae	161.055	67.01490723214286
North Sea Basin	Kalyptea stegasta	Copestake and Partington, 2023	1 in amm_b_Erymnoceras coronatum	162.91	43.19670122857143

Histogram