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Table 2 Species categorised after geographic origin and period with the corresponding septal slope factor (short: septal slope) and palaeolatitude (after Kocsis & Scotese, 2020)

From: Is the relative thickness of ammonoid septa influenced by ocean acidification, phylogenetic relationships and palaeogeographic position?

Species Origin Latitude Septal slope Period
Arcestes sp. Austria (Goisern) 45 0.0018 Late Triassic (Norian)
Cladiscites sp. Timor − 25 0.0147 Late Triassic (Norian)
Halorites sp. Timor − 25 0.0098 Late Triassic (Norian)
Megaphyllites sp. Greece 40 0.0054 Late Triassic (Norian)
Discophyllites ebneri Timor − 25 0.0077 Late Triassic (Norian)
Monophyllites sp. Timor − 25 0.0067 Late Triassic (Norian)
Rhacophyllites neojurensis Timor − 25 0.0075 Late Triassic (Norian)
Psiloceras planorbis Germany 50 0.0047 Early Jurassic (Hettangian)
Psiloceras naumanni Austria (Schreinbach am Wolfgangsee) 45 0.0034 Early Jurassic (Hettangian)
Arietites sp. Switzerland 50 0.0012 Early Jurassic (Sinemurian)
Asteroceras sp. Germany/France 50 0.0019 Early Jurassic (Sinemurian)
Schlotheimia sp. Germany (Nürnberg) 50 0.0036 Early Jurassic (Hettangian-Sinemurian)
Fuciniceras cf. isseli Switzerland (Tessin, Arzo) 45 0.0064 Early Jurassic (Sinemur.)
Dactylioceras commune Great Britain (Yorkshire) 50 0.0037 Early Jurassic (Toarcian)
Lytoceras fimbriatum Germany (Schömberg b. Balingen) 50 0.0067 Early Jurassic
Leioceras sp. France (Belmont d'Azergues) 50 0.001 Early/Middle Jurassic (Toarcian, Aalenian)
Ludwigia bradfordensis Switzerland/Germany 50 0.0021 Middle Jurassic (Aalenian)
Staufenia opalinoides Germany (Baden-Württemberg) 50 0.0004 Middle Jurassic (Aalenian)
Macrocephalites compressus Switzerland (Anwil, Aargau) 45 0.0041 Middle Jurassic (Callovian)
Divisosphinctes besairei Madagascar (Sakaraha) − 20 0.0037 Late Jurassic (Oxfordian)
Argonauticeras besairei Madagascar (Majunga) − 40 0.0107 Early Cretaceous (Albian)
Cleoniceras sp. Madagascar (Majunga) − 40 0.0028 Early Cretaceous (Albian)
Desmoceras sp. Madagascar (Majunga) − 40 0.0078 Early Cretaceous (Albian)
Gaudryceras sp. Madagascar (Majunga) − 40 0.0124 Early Cretaceous (Albian)
Eogaudryceras umbilicostriatus Madagascar (Majunga) − 40 0.004 Early Cretaceous (Albian)