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
LO	North Sea Compilation	Isthmocystis distincta	Costa and Davey, 1992	0 in amm_b_Speetoniceras inversum	130.91	39.329
FO	North Sea Compilation	Isthmocystis distincta	Riding and Thomas, 1992	0 in amm_b_Galbanites kerberus	144.52	39.936
LO	Q13_14	Isthmocystis distincta	Duxbury, 2001	0.15 in amm_b_Milanowskia speetonensis	129.772	44.957
FO	Northeast Greenland	Isthmocystis distincta	Nøhr-Hansen, 2025	0.76 in stage_Tithonian	144.574	53.195
FO	Central Danish Trough	Isthmocystis distincta	Heilmann-Clausen, 1987	0 in amm_b_Galbanites kerberus	144.52	43.382
FO	Haldager 1	Isthmocystis distincta	Davey, 1982	0 in amm_b_Galbanites kerberus	144.52	43.986
FO	Hold With Hope	Isthmocystis distincta	Nøhr-Hansen et al., 2019	0.75 in stage_Tithonian	144.635	53.706
FO	Volga Basin	Isthmocystis distincta	Harding et al., 2011	0.67 in amm_r_Virgatites virgatus	144.845	46.248
FO	Vocontian Basin	Isthmocystis distincta	Duxbury, 2024	0.25 in amm_t_Karakaschiceras inostranzewi	135.85	30.025
LO	Vocontian Basin	Isthmocystis distincta	Duxbury, 2024	0.2 in amm_t_Neocomites peregrinus	134.258	29.938
FO	Speeton	Isthmocystis distincta	Davey, 2001	0.55 in amm_b_Endemoceras regale	131.315	40.723
LO	Speeton	Isthmocystis distincta	Duxbury, 2023	0.5 in amm_b_Speetoniceras inversum	130.425	40.861
FO	Wollaston	Isthmocystis distincta	Alsen et al., 2023	0.2 in amm_s_Chetaites sibericus/Praetollia maynci	141.408	54.154