SUPPLEMENTAL DATA S3
Landmarks used in the geometric morphometric analysis. Numbered points: (1)
Most anterior point of the proximal half. (2) Point of maximum proximal curvature. (3)
Most posterior point of the proximal half. (4) Point of maximum posterior concavity. (5)
Most posterior point of the distal half. (6) Distal most point. (7) Most anterior point of the distal half. (8) Point of maximum anterior concavity.
Table S3. List of specimens sampled for the geometric morphometric analysis
Taxon Collection number Acamptonectes densus NBM1284-R Aegirosaurus leptospondylus SM (neotype) Arthropterygius chrisorum CMN 40608 Arthropterygius thalassonotus MOZ-PV 6145 Brachypterygius extremus NHMUK PV R3177 Brachypterygius extremus CAMSM J67556 Caypullisaurus bonapartei MACN-N-32 Cryopterygius kristiansenae PMO 214.578 Cryopterygius kielanae GMUL UŁ no. 3579-81 Grendelius alekseevi YKM 56702 Ichthyosaurus communis NHMUK PV R1162 Janusaurus lundi PMO 222.654 Keilhauia sp. PMO 222.667 Maiaspondylus lindoei UALVP 45635 Ophthalmosaurus icenicus NHMUK PV R2134 Palvennia hoybergeti PMO 222.669 “Platypterygius” americanus UW 5547 “Platypterygius” australis QM F3348 “Platypterygius” hauthali M LP 79-1-30-1 Stenopterygius quadriscissus GPIT Z04 Sumpalla argentina MOZ-PV 5788 Sveltonectes insolitus IRSNBR269 Temnodontosaurus SMNS 9445 Undorosaurus gorodischensis UPM EP-II-20(572)
Supplemental Fig. S3a. Canonical variate analysis (CVA). (red= Arthropterygius group; green= non-ophthalmosaurids; black= ophthalmosaurids).
Suppelental Fig. S3b. Principal component analysis of neoichthyosaurian humeri, delimited by PC1 and PC3. Humeri outlines represent mayor shape changes alongside positive and negative values of the PC1 and PC3 axes. (red= Arthropterygius group; green= non-ophthalmosaurids; black= ophthalmosaurids). Suppelental Fig. S3c. Principal component analysis of neoichthyosaurian humeri, delimited by PC1 and PC4. Humeri outlines represent mayor shape changes alongside positive and negative values of the PC1 and PC4 axes. (red= Arthropterygius group; green= non-ophthalmosaurids; black= ophthalmosaurids).