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Fig. 5 in Late Jurassic-Early Cretaceous oysters from Siberia: A systematic review

Fig. 5. Microstructure of studied gryphaeid oysters. A. Deltoideum delta (Smith, 1817), TsSGM 2068/87; Kimmeridgian, Dorset, England. B. Pernostrea uralensis (Zakharov, 1972), TsSGM 2068/45; Upper Volgian, Maurynya River, eastern slopes of the Northern Urals. Microstructure (A1, B1), cross section (A2, B2). RF, regularly foliated structure; HCF,?herringbone cross-foliated structure.

Fig. 1 in Late Jurassic-Early Cretaceous oysters from Siberia: A systematic review

Fig. 1. Geographical position of the studied oysters locations: 1, Lopsiya River; 2, Tolya River; 3, Maurynya River; 4, Yatriya River; 5, Boyarka River; 6, Bol'shaya Romanikha River; 7, Dyabaka-Tari River (after Zakharov 1966; Zakharov and Mesezhnikov 1974).

Fig. 4 in Late Jurassic-Early Cretaceous oysters from Siberia: A systematic review

Fig. 4. Measurements of morphometric parameters of oyster shells. D1, distance between posterior adductor muscle scar and anterior valve margin; D2, distance between posterior adductor muscle scar and posterior valve margin; D3, distance between posterior adductor muscle scar and ventral margin; D4, distance between posterior adductor muscle scar and dorsal margin; H, shell height; HCF, herringbone cross-foliated structure; Hla, ligament area height; Hpam, posterior adductor muscle scar height; L, shell length; LA, ligament area; LV, left valve; Lab, anterior bourrelet length; Lla, ligament area length; Lpam, posterior adductor muscle scar length; Lpb, posterior bourrelet length; Lr, resilifer length; PAM, posterior adductor muscle scar; RF, regularly foliated structure; RV, right valve.

Fig. 8 in Late Jurassic-Early Cretaceous oysters from Siberia: A systematic review

Fig. 8. Gryphaeid oyster Pernostrea mesezhnikovi sp. nov., Lower Volgian, Lopsiya River, Northern Urals. A. TsSGM 2068/28, paratype, details of right valve sculpture: fine radial striae (A1), exterior with Gastrochaenolites (A2), interior (A3). B. TsSGM 2048/21, interior of right valve. C. TsSGM 2068/29, interior of right valve.

Fig. 12 in Filling the Corallian gap: New information on Late Jurassic marine reptile faunas from England

Fig. 12. Tooth of the metriorhynchid reptile Metriorhynchus superciliosus de Blainville, 1853 (NHMUK PV OR 47044) from Heddington (Wiltshire), Corallian, in labial view (A), close up of labial ornamentation (B).

Fig. 14 in Filling the Corallian gap: New information on Late Jurassic marine reptile faunas from England

Fig. 14. Time calibrated phylogenetic tree of the main Jurassic Sub-Boreal Seaway marine reptile lineages stratigraphic ranges. A. Plesiosauria (modified from Fischer et al. 2015, 2017). B. Ichthyosauria (modified from Fischer et al. 2014). C. Thalattosuchia (Young et al. 2016; Foffa et al. 2017). MJML, Museum of Jurassic Marine Life—the Steve Etches Collection, Kimmeridge, UK.

Fig. 11 in Filling the Corallian gap: New information on Late Jurassic marine reptile faunas from England

Fig. 11. Teeth of the metriorhynchid reptile Tyrannoneustes. A. YORYM:2016.308, cf. Tyrannoneustes, from Malton (Yorkshire), middle Oxfordian, in labial (A1), axial (A2), and apical (A3) views, detail of the apex of the crown (A4, not to scale). B. NHMUK PV R3939, Tyrannoneustes lythrodectikos Young, Andrade, Brusatte, Sakamoto, and Liston, 2013a, from Peterborough (Cambridgeshire), Callovian, dentary tooth crushed at its base resulting more laterally compressed than in life, in labial (B1), axial (B2, B4), and lingual (B3) views.

Fig. 9 in Filling the Corallian gap: New information on Late Jurassic marine reptile faunas from England

Fig. 9. Teeth of Machimosaurini indet. from Corallian. A. OUMNH J.40669, unkown locality, "Corallian beds", Oxfordian, in labial (A1), axial (A2, A4), and lingual (A3) views. B. OUMNH J.50169, from Headington (Oxfordshire), middle Oxfordian, in lingual/axial oblique view.

Fig. 10 in Filling the Corallian gap: New information on Late Jurassic marine reptile faunas from England

Fig. 10. Teeth of the metriorhynchid reptile Torvoneustes sp. A. YORYM:2016.309, from Malton (Yorkshire), middle Oxfordian, in labial (A1), axial A2), and lingual (A3) views, and close ups of the carina and ornamentation (A4, A5, not to scale). B. CAMSM J.13309, from Malton (Yorkshire), middle Oxfordian, in labial (B1), axial (B2, B4), lingual (B3) views, and close ups of the carinae (B5, B6, not to scale). C–E. Comparative line drawings C, Torvoneustes carpenteri; D, T. mexicanus; E, T. coryphaeus) teeth (C1–E1, not to scale) and details of ornamentation (C2–E2, not to scale), the arrows in E2 show that the ornamentation does not interact with the carinae (modified from Barrientos-Lara et al. 2016).

Fig. 8 in Filling the Corallian gap: New information on Late Jurassic marine reptile faunas from England

Fig. 8. Ichthyosaurid reptile Ophthalmosaurinae indet. (CAMSM J.29866), basioccipital from Ampthill (Bedfordshire), Oxfordian, in posterior (A), lateral (B, E), anterior (C), dorsal (D), and ventral (F) views.

Fig. 7 in Filling the Corallian gap: New information on Late Jurassic marine reptile faunas from England

Fig. 7. Ichthyosaurid reptile cf. Ophthalmosaurus sp. (A) and Reptilia indet. (B) from Malton (Yorkshire), Oxfordian. A. NHMUK R 648, isolated crown, the exact view cannot be assessed. B. NHMUK PV R 6770, tooth in labial (B1), axial (B2, B4), lingual (B3), and apical (B5) views.

Fig. 6 in Filling the Corallian gap: New information on Late Jurassic marine reptile faunas from England

Fig. 6. Postcrania of Plesiosauria indet. A. OUMNH J.50338,?femur of a juvenile plesiosaur, from Headington (Oxfordshire),?middle Oxfordian, in lateral (A1), anterior (A2), medial (A3), posterior (A4), proximal (A5), and distal (A6) views. B. OUMNH J.10349, from Headington (Oxfordshire),?middle Oxfordian, fragment of a girdle element in ventral (B1) and dorsal (B2) views. C. OUMNH J.12340/1,2, from Hatford Farington (Berkshire), pectoral (C1) and dorsal (C2) vertebrae.

Fig. 5 in Filling the Corallian gap: New information on Late Jurassic marine reptile faunas from England

Fig. 5. Teeth of the pliosaurid reptile "Pliosaurus" grossouvrei Sauvage, 1873 (A, B) and "Pliosaurus" andrewsi Tarlo, 1960 (C). A. NHMUK PV OR 47044, from Malton (Yorkshire), middle Oxfordian, in labial (A1), axial (A2, A4), lingual (A3), and apical (A5) views. B. NHMUK PV OR 47971a, from Malton (Yorkshire), middle Oxfordian, in labial (B1), axial (B2), and oblique axial/labial (B3) views. C. NHMUK PV R3891, from Peterborough Cambridgeshire), Callovian, in lingual (C1) and axial (C2) views.

Fig. 2 in Filling the Corallian gap: New information on Late Jurassic marine reptile faunas from England

Fig. 2. Stratigraphic columns showing the Oxfordian geological succession the main Corallian fossiliferous counties (from Cope 2000; Wright 2006, 2009; Coe 1995). Abbreviations: Fm., Formation; L. Calc., Lower Calcareous; Mb., Member; W.L.M, Wheatley Limestone Member;? uncertain occurrence/lost specimen; * from Bedsfordshire. For explanations of animal silhouettes please see Fig. 1.

Fig. 3 in Filling the Corallian gap: New information on Late Jurassic marine reptile faunas from England

Fig. 3. Teeth of Plesiosauroidea. A. BRSMG Cd5593, cf. Muraenosaurus, from Seend (Whiltshire), lower to middle Oxfordian. B. OUMNH J.47559, Cryptroclididae indet., from Headington (Oxfordshire), middle Oxfordian. C. NHMUK PV R 2861, Muraenosaurus leedsi Seeley, 1874, from Peterborough (Cambridgeshire), Callovian. D. NHMUK PV R3539, Tricleidus seeleyi Andrews, 1909 from Peterborough (Cambridgeshire), Callovian. E. CAMSM J.30070, Cryptoclididae indet. from Ely (Cambridgeshire), Kimmeridgian. F. NHMUK PV R8621, Cryptoclidus eurymerus (Phillips, 1871) from Peterborough (Cambridgeshire), Callovian. G. NHMUK PV R8431, Kimmerosaurus langhami Brown, 1981 from Endcombe Bay (Dorset), Tithonian. A1, B, C4–G4, labial, A2, A3, C1–G1, C3–G3, axial, and C2–G2, lingual views. Note the similarities in the distribution and shape of ornamentation in A and E. C–G modified from Brown (1981).

Fig. 10 in Osteology and phylogeny of Late Jurassic ichthyosaurs from the Slottsmøya Member Lagerstätte (Spitsbergen, Svalbard)

Fig. 10. Basicranium of ophthalmosaurid ichthyosaur Undorosaurus? kristiansenae Druckenmiller, Hurum, Knutsen, and Nakrem, 2012 (PMO 214.578, holotype) from Spitsbergen, Svalbard, Slottsmøya Member Lagerstätte, Tithonian. A. Basioccipital posterior (A1), right lateral (A2), ventral (A3) and dorsal (A4) views. B. Basisphenoid in ventral (B1), dorsal (B2), and anterior (B3) views. C. Left stapes in posterior (C1), medial (C2), anterior (C3), and dorsal (C4) views.

Fig. 3 in Osteology and phylogeny of Late Jurassic ichthyosaurs from the Slottsmøya Member Lagerstätte (Spitsbergen, Svalbard)

Fig. 3. Explanatory drawing of the skeleton of ophthalmosaurid ichthyosaur Keilhauia sp. (PMO 222.667) from Spitsbergen, Svalbard, Slottsmøya Member Lagerstätte, Tithonian. Modified and corrected from Delsett et al. (2016).

Fig. 6 in Osteology and phylogeny of Late Jurassic ichthyosaurs from the Slottsmøya Member Lagerstätte (Spitsbergen, Svalbard)

Fig. 6. Cranial elements of ophthalmosaurid ichthyosaur Keilhauia sp. (PMO 222.667) from Spitsbergen, Svalbard, Slottsmøya Member Lagerstätte, Tithonian. A. Lower jaw fragment in dorsal view (anterior to the left). A3, detail of inner structures with arrow showing position of ventral-pointing tooth from the upper jaw, anterior to the right, in dorsal view. B. Right articular in medial (B1) and lateral (B2) views. C. Hyoid in lateral or medial view (anterior to the left). D–F. Teeth. Photographs (A1, B–F), μCT scan images (A2, A3).

Fig. 1. A in Osteology and phylogeny of Late Jurassic ichthyosaurs from the Slottsmøya Member Lagerstätte (Spitsbergen, Svalbard)

Fig. 1. A. Map of Svalbard archipelago and the main island Spitsbergen with excavation area marked with an asterisk. B. Geological map of the excavation sites for the SML ophthalmosaurid specimens described and discussed in this paper (red dots); see Fig. 2. Adapted from Hurum et al. (2012).

Fig. 2 in Osteology and phylogeny of Late Jurassic ichthyosaurs from the Slottsmøya Member Lagerstätte (Spitsbergen, Svalbard)

Fig. 2. Composite section of the Slottsmøya Member Lagerstätte with the ophthalmosaurids described and discussed in the text. Specimens described in this paper marked with an asterisk. Modified from Delsett et al. (2017). A bed with a high abundance of echinoderm fossils is set as marker bed (0 m) in the section (Hurum et al. 2012; Rousseau and Nakrem 2012).