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	Speeton	Nelchinopsis critina	Duxbury, 2023	0.5 in amm_b_Craspedodiscus gottschei	128.405	41.41
LO	Speeton	Nelchinopsis critina	Duxbury, 2023	1 in amm_b_Craspedodiscus gottschei	127.99	41.523
LO	Scotian Margin	Nelchinopsis kostromiensis	Williams et al., 1993	0.8 in stage_Hauterivian	127.72	35.793
FO	Scotian Margin	Nelchinopsis kostromiensis	Williams et al., 1993	0.15 in stage_Valanginian	136.935	35.777
FO	North Sea Compilation	Nelchinopsis kostromiensis	Costa and Davey, 1992	0 in amm_b_Polyptychites	136.72	39.661
LO	North Sea Compilation	Nelchinopsis kostromiensis	Costa and Davey, 1992	0.75 in amm_b_Simbirskites marginatus	127.45	39.981
LO	Q13_14	Nelchinopsis kostromiensis	Duxbury, 2001	0 in amm_b_Paracrioceras rarocinctum	126.5	45.868
FO	Q13_14	Nelchinopsis kostromiensis	Duxbury, 2001	0 in amm_b_Prodichotomites	135.55	45.264
FO	Northeast Greenland	Nelchinopsis kostromiensis	Nøhr-Hansen, 2025	0.68 in stage_Valanginian	134.232	52.573
LO	Northeast Greenland	Nelchinopsis kostromiensis	Nøhr-Hansen, 2025	1 in stage_Hauterivian	126.5	53.214
FO	Central Danish Trough	Nelchinopsis kostromiensis	Heilmann-Clausen, 1987	0 in amm_b_Endemoceras amblygonium	132.6	42.835
LO	Central Danish Trough	Nelchinopsis kostromiensis	Heilmann-Clausen, 1987	1 in amm_b_Simbirskites variabilis	126.5	43.65
LO	Hold With Hope	Nelchinopsis kostromiensis	Nøhr-Hansen et al., 2019	1 in stage_Hauterivian	126.5	53.698
FO	Hold With Hope	Nelchinopsis kostromiensis	Nøhr-Hansen et al., 2019	0.75 in stage_Valanginian	133.875	53.023
FO	Moray Firth	Nelchinopsis kostromiensis	Duxbury, 2018	0.2 in amm_b_Polyptychites	136.486	44.421
FO	Broyon	Nelchinopsis kostromiensis	Monteil, 1992a	0 in amm_t_Neocomites neocomiensiformis	136.72	31.563
FO	Vocontian Basin	Nelchinopsis kostromiensis	Duxbury, 2024	0.65 in amm_t_Saynoceras verrucosum	134.847	29.974
LO	Speeton	Nelchinopsis kostromiensis	Duxbury, 2023	0.95 in amm_b_Simbirskites variabilis	126.538	41.918
LO	Svalbard	Nelchinopsis kostromiensis	Nøhr-Hansen, 2025	0.3 in stage_Barremian	124.97	67.32
FO	Wollaston	Nelchinopsis kostromiensis	Alsen et al., 2023	0.5 in stage_Valanginian	135.15	53.727