Table 1 Taxa of the studied ammonites

Phylloceratoidea

 Ptychophylloceras cf. dacquei

MAn-4514

Sakaraha area, SW–Madagascar

Upper Oxfordian, Jurassic

40

V → RV

10

 Ptychophylloceras cf. dacquei

MAn-4515

Sakaraha area, SW–Madagascar

Upper Oxfordian, Jurassic

40

V → RV

15

 Ptychophylloceras cf. dacquei

MAn-4516

Sakaraha area, SW–Madagascar

Upper Oxfordian, Jurassic

40

V → RV

19

 Calliphylloceras sp.

MAn-4511

Sakaraha area, SW–Madagascar

Upper Oxfordian, Jurassic

21

V

12

 Calliphylloceras sp.

MAn-4511

Sakaraha area, SW–Madagascar

Upper Oxfordian, Jurassic

52

V

20

 Holcophylloceras sp.

MAn-4510

Sakaraha area, SW–Madagascar

Upper Oxfordian, Jurassic

41

V → C

16

 Euphylloceras cf. velledae

MAo-1770

Ambatolafia area, Central Madagascar

Lower Albian, Cretaceous

28

V

5

 Euphylloceras sp.

MAo-1769

Ambatolafia area, Central Madagascar

Lower Albian, Cretaceous

30

V

23

 Phyllopachyceras sp.

MAo-1771

Ambatolafia area, Central Madagascar

Lower Albian, Cretaceous

22

NC, V

12

Lytoceratoidea

 Eotetragonites umbilicostriatus

MAo-1773

Ambatolafia area, Central Madagascar

Lower Albian, Cretaceous

36

V, DV

24

 Eotetragonites umbilicostriatus

MAo-1774

Ambatolafia area, Central Madagascar

Lower Albian, Cretaceous

39

V

18

 Eotetragonites umbilicostriatus

MAo-1775

Ambatolafia area, Central Madagascar

Lower Albian, Cretaceous

22

NC, V

17

 Eotetragonites umbilicostriatus

MAo-1776

Ambatolafia area, Central Madagascar

Lower Albian, Cretaceous

30

NC, V, FV

24

 Tetragonites popentensis

MAo-1798

Teshionakagawa area, Hokkaido

Lower Campanian, Cretaceous

25

NC, V

5

Hildoceratoidea

 Leioceras opalinum

MAn-4518

Heiningen, SW–Germany

Lower Aalenian, Jurassic

27

NC

–

Perisphinctoidea

 Perisphinctidae indet

MAn-4501

Sakaraha area, SW–Madagascar

Upper Oxfordian, Jurassic

19

C

5

 Kranaosphinctes sp.

MAn-4500

Sakaraha area, SW–Madagascar

Upper Oxfordian, Jurassic

26

NC, C

4

 Divisosphinctes besairiei

PA-10151b

Sakaraha area, SW–Madagascar

Upper Oxfordian, Jurassic

94

C

8

 Divisosphinctes sp.

MAn-4498

Sakaraha area, SW–Madagascar

Upper Oxfordian, Jurassic

23

C

6

 Divisosphinctes sp.

MAn-4499

Sakaraha area, SW–Madagascar

Upper Oxfordian, Jurassic

73

C

8

 Epaspidoceras jeanneti

MAn-4505

Sakaraha area, SW–Madagascar

Upper Oxfordian, Jurassic

31

NC

–

Desmoceratoidea

 Desmoceras latidorsatum

MAo-1781

Ambatolafia area, Central Madagascar

Lower Albian, Cretaceous

35

RV

6

 Desmoceras latidorsatum

MAo-1782

Ambatolafia area, Central Madagascar

Lower Albian, Cretaceous

33

RV

7

 Desmoceras latidorsatum

MAo-1783

Ambatolafia area, Central Madagascar

Lower Albian, Cretaceous

34

RV

6

 Desmoceras latidorsatum

MAo-1784

Ambatolafia area, Central Madagascar

Lower Albian, Cretaceous

34

RV

6

 Desmoceras latidorsatum

MAo-1785

Ambatolafia area, Central Madagascar

Lower Albian, Cretaceous

35

NC, RV

17

 Desmoceras latidorsatum

MAo-1786

Ambatolafia area, Central Madagascar

Lower Albian, Cretaceous

35

RV

14

 Desmoceras latidorsatum

MAo-1787

Ambatolafia area, Central Madagascar

Lower Albian, Cretaceous

18

NC, RV

16

 Desmoceras latidorsatum

MAo-1788

Ambatolafia area, Central Madagascar

Lower Albian, Cretaceous

38

NC, RV

23

 Puzosia saintoursi

MAo-1792

Ambatolafia area, Central Madagascar

Lower Albian, Cretaceous

38

C

15

 Puzosia saintoursi

MAo-1793

Ambatolafia area, Central Madagascar

Lower Albian, Cretaceous

18

C

8

 Puzosia saintoursi

MAo-1794

Ambatolafia area, Central Madagascar

Lower Albian, Cretaceous

87

RV

12

 Puzosia saintoursi

MAo-1795

Ambatolafia area, Central Madagascar

Lower Albian, Cretaceous

35

C

4

 Puzosia saintoursi

MAo-1796

Ambatolafia area, Central Madagascar

Lower Albian, Cretaceous

–

C

8

 Puzosia saintoursi

MAo-1797

Ambatolafia area, Central Madagascar

Lower Albian, Cretaceous

52

C

20

 Umsinenoceras linguatuberculatum

MAo-1791

Ambatolafia area, Central Madagascar

Lower Albian, Cretaceous

18

C

3

 Neosilesites ambatolafrensis

MAo-1780

Ambatolafia area, Central Madagascar

Lower Albian, Cretaceous

23

C

10

 Neosilesites sp.

MAo-1777

Ambatolafia area, Central Madagascar

Lower Albian, Cretaceous

–

C

3

 Neosilesites sp.

MAo-1778

Ambatolafia area, Central Madagascar

Lower Albian, Cretaceous

18

RV, C

7

 Canadoceras kossmati

MAo-1799

Teshionakagawa area, Hokkaido

Lower Campanian, Cretaceous

49

V → C

19

 Menuites sp.

MAo-1800

Teshionakagawa area, Hokkaido

Lower Campanian, Cretaceous

40

V → C

8