Data plotted here is from DINOSTRAT, available via Zenodo: DOI: 10.5281/zenodo.18375303. Please cite Bijl, 2022 https://doi.org/10.5194/essd-14-579-2022 when using this data.

Distribution


Plots are based on the following information

FO/LO	Location	Taxon	Source	Calibration	Age (Ma)	Paleolatitude
FO	Arctic Basin	Ambonosphaera calloviana	Bujak et al., 2022	0 in amm_b_Proplanulites koenigi	164.6	73.297
LO	Arctic Basin	Ambonosphaera calloviana	Bujak et al., 2022	0 in amm_b_Quenstedtoceras mariae	161.53	73.58
FO	Barentz Sea	Ambonosphaera calloviana	Smelror, 1994	1 in stage_Bathonian	165.29	65.022
LO	Barentz Sea	Ambonosphaera calloviana	Smelror, 1994	0 in stage_Oxfordian	161.53	65.424
LO	Milne Land	Ambonosphaera calloviana	Smelror, 1988a	0.75 in amm_b_Peltoceras athleta	162.565	50.746
FO	Milne Land	Ambonosphaera calloviana	Smelror, 1988a	0.5 in amm_b_Sigaloceras calloviense	163.67	50.657
FO	Vega	Ambonosphaera calloviana	Århus et al., 1989	0.05 in amm_b_Peltoceras athleta	162.887	53.555
LO	Kong Karls Land	Ambonosphaera calloviana	Smelror, 1988b	0.5 between 0 amm_b_Quenstedtoceras lamberti 1 amm_b_Quenstedtoceras mariae	161.055	67.08
FO	Kong Karls Land	Ambonosphaera calloviana	Smelror, 1988b	0.6 between 0 amm_b_Macrocephalites herveyi 1 amm_b_Peltoceras athleta	163.586	66.782
FO	Nordvik Peninsula	Ambonosphaera delicata	Nikitenko et al., 2008	0.2 in amm_s_Craspedites taimyrensis	143.294	74.642
LO	Nordvik Peninsula	Ambonosphaera delicata	Nikitenko et al., 2008	0.15 in amm_s_Unzoned	137.134	73.115
LO	Arctic Basin	Ambonosphaera staffinensis	Williams et al., 2025	0 in stage_Berriasian	143.1	71.271
FO	Isle of Skye	Ambonosphaera staffinensis	Riding and Thomas, 1997	0.8 in amm_b_Perisphinctes cautisnigrae	157.368	43.977
LO	Isle of Skye	Ambonosphaera staffinensis	Riding and Thomas, 1997	0.5 in amm_b_Rasenia cymodoce	152.72	44.49
LO	Central Danish Trough	Ambonosphaera staffinensis	Heilmann-Clausen, 1987	0.4 in amm_b_Prodichotomites	135.15	42.992
LO	Haldager 1	Ambonosphaera staffinensis	Davey, 1982	0 in amm_b_Galbanites okusensis	144.72	43.99
LO	Nordvik Peninsula	Ambonosphaera staffinensis	Nikitenko et al., 2008	0.5 in amm_s_Hectoroceras kochi	138.755	73.517
LO	Moray Firth	Ambonosphaera staffinensis	Duxbury, 2018	0.35 in amm_b_Polyptychites	136.31	44.428
LO	Volga Basin	Ambonosphaera staffinensis	Harding et al., 2011	0.5 in amm_r_Craspedites nodiger	142.985	45.915
LO	Paksa	Ambonosphaera utera	Shulgina et al., 1994	0.15 in amm_s_Unzoned	137.134	73.139
FO	Paksa	Ambonosphaera utera	Shulgina et al., 1994	0 in stage_Berriasian	143.1	74.617