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Fig. 9 in Ontogeny and autecology of an Early Cretaceous trigoniide bivalve from Neuquén Basin, Argentina

Fig. 9. Changes implied on costae shape for the two recognized post-larval growth stages with oblique costae. Changes for the first stage (A→B). Changes for the second stage (B→C). Landmark-semilandmark reconstruction (A 1–C1), reconstruction represented by individuals of the ontogenetic series (A2–C2). Scale bars 2 mm.

Fig. 5 in Ontogeny and autecology of an Early Cretaceous trigoniide bivalve from Neuquén Basin, Argentina

Fig. 5. Individuals of Myophorella garatei Leanza, 1981 representing different size categories on the ontogenetic series; late Valanginian, Cerro Mesa. A–C. Stages recovered from growth lines; MCF-PIPH-428, drawn by camera lucida on lateral view (A2, B2, C2), enlargements (A1, B1, C1). D, E. Stages recovered from growth lines and photographed on lateral view. D. MCF-PIPH-428. E. MCF-PIPH-429. F–H. Individuals recovered on their final growth stage on lateral view. F. MCF-PIPH-428. G. MCF-PIPH-427. H. MCF-PIPH-429. I–K. Dorsal view of some individuals on different stages. I. MCF- PIPH-428. J. MCF-PIPH-429. K. MCF-PIPH-427.

Fig. 8 in Ontogeny and autecology of an Early Cretaceous trigoniide bivalve from Neuquén Basin, Argentina

Fig. 8. Allometry analysis for the width compared to the umbo-posterior point distance; black diamonds, first stage (isometric); white diamonds, second stage (allometric). A. Cartesian graphic of width vs. umbo-posteri- or point distance. B. Cartesian graphic of the same variables with both of them converted to logarithm; black continuous line, line of slope 1; grey dashed line, regression line for the first stage; black dashed line, regression line for the second stage.

Fig. 4 in Ontogeny and autecology of an Early Cretaceous trigoniide bivalve from Neuquén Basin, Argentina

Fig. 4. SEM photographs of the umbonal region of Myophorella garatei Leanza, 1981; late Valanginian, Cerro Mesa. A. MCF-PIPH-428, umbonal region of left valve showing the preserved prodissoconch (pd); detail of the prodissoconch (A1); same picture showing the discontinuities identified on the shell surface and their possible interpretation (A2). B. MCF-PIPH-428, prodissoconch in lateral (B1) and ventral (B2) views, together with early postmetamorphic shell; white arrow on B1 points to the antecarinal sulcus, white arrows on B2 indicate a discontinuity on the shell, probably the margin of prodissoconch I. C. MCF-PIPH-428, prodissoconch in ventral view together with early postmetamorphic shell. D. MCF-PIPH-428, umbonal region showing early postmetamorphic flank costae with Haidaia type ornamentation (white arrows) and early area development.

Fig. 7 in Ontogeny and autecology of an Early Cretaceous trigoniide bivalve from Neuquén Basin, Argentina

Fig. 7. Changes implied on general shell shape in lateral view for the two recognized post-larval growth stages. Changes for the first stage (AĄB). Changes for the second stage (BĄC). Landmark-semilandmark reconstruction (A 1 –C 1), reconstruction represented by individuals of the ontogenetic series (A –C ). Scale bars 2 mm.

Fig. 1 in Ontogeny and autecology of an Early Cretaceous trigoniide bivalve from Neuquén Basin, Argentina

Fig. 1. Schematic drawing of the shell of an adult specimen of Myopohorella garatei Leanza, 1981 showing the main features of trigoniides shell morphology. A. Left lateral view. B. Dorsal view.

Fig. 6 in Ontogeny and autecology of an Early Cretaceous trigoniide bivalve from Neuquén Basin, Argentina

Fig. 6. PCA of the general shell shape in lateral view, showing PC 1 (65.6% of variance), PC 2 (11.8% of variance) and PC 3 (9.1% of variance); black diamonds, first growth stage; white diamonds, second growth stage. A. PC 1 versus PC 2. B. PC 1 versus PC 3.

Fig. 3 in Ontogeny and autecology of an Early Cretaceous trigoniide bivalve from Neuquén Basin, Argentina

Fig. 3. Landmarks and semilandmarks used on geometric morphometric analyses; black dots, landmarks; grey dots, semilandmarks; white dots, helper points. A. Landmarks and semilandmarks used for the general shell shape analyses; 1, landmark 1, the umbo; 2, landmark 2, intersection between the escutcheon carina and the posterior margin; 3, landmark 3, intersection between the marginal carina and the posterior margin. B. Landmarks and semilandmarks used for the costae shape analysis.

Fig. 2 in Ontogeny and autecology of an Early Cretaceous trigoniide bivalve from Neuquén Basin, Argentina

Fig. 2. Location map of Neuquén Basin for the late Valanginian–Hauterivian according to Legarreta and Uliana (1991), and of the localities of Cerro Mesa and Bajada del Agrio in Neuquén Province, Argentina.

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Fig. 3 in A new turtle species of Brodiechelys from the Early Cretaceous of Spain: Systematic and palaeobiogeographic implications

Fig. 3. Phylogenetic hypotheses of the new taxon Brodiechelys royoi based on the modified data set of Sterli and de la Fuente (2011) proposed here (A), and on the data matrix proposed by Tong et al. (2012) (B). Values refer percentages under 100% obtained in the majority rule analyses.

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Fig. 2 in A new turtle species of Brodiechelys from the Early Cretaceous of Spain: Systematic and palaeobiogeographic implications

Fig. 2. Type specimens of Brodiechelys royoi sp. nov. from Morella (Castellón, Spain). A. CMP-3b/181, holotype, shell in dorsal (A1, A2) and ventral (A3, A4) views. B. CMP-3c/293, second right costal plate in dorsal (B1, B2) and ventral (B3, B4) views. C. CMP-3c/122, first right costal in dorsal (C1, C2) and ventral (C3, C4) views.

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Fig. 1 in A new turtle species of Brodiechelys from the Early Cretaceous of Spain: Systematic and palaeobiogeographic implications

Fig. 1. Geographical location of Morella (Castellón, Spain), the type locality of Brodiechelys royoi.

Fig. 3. A in A new species of the plagiaulacoid multituberculate mammal Eobaatar from the Early Cretaceous of southern Britain

Fig. 3. A. Outline location map of Southern Britain. B. Outline geological map of the Isle of Wight.

Fig.10. A. BMNH M 45658 in A new species of the plagiaulacoid multituberculate mammal Eobaatar from the Early Cretaceous of southern Britain

Fig.10. A. BMNH M 45658, an I2 tentatively referred to Loxaulax valdensis from the Early Cretaceous Hastings Beds Group, mainland Britain, in occlusal (A1) and distal (A2) views, line drawing (A3) to show features giving the erroneous impression that BMNH M 45658 may be a left I3. See text for a discussion. B. BMNH M 45483 a left I3 assigned to Eobaatar clemensi from the Early Cretaceous Wessex Formation, Isle of Wight, in occlusal (B1) and anterolabial (B2) views, line drawing (B3) as seen in B2. C. Normal light photograph of an indeterminate plagiaulacoid left I2 (part of SMNS 51981) from the Early Cretaceous Wessex Formation, Isle of Wight, in labial view (it was not possible to obtain scanning electron micrographs of the specimen which was glued to card by the original collector).

Fig. 7 in A new species of the plagiaulacoid multituberculate mammal Eobaatar from the Early Cretaceous of southern Britain

Fig. 7. Scanning electron micrographs of plagiaulacoid multituberculate Eobaatar clemensi sp. nov. from the Early Cretaceous Wessex Formation, Isle of Wight. A. BMNH M 45482, holotype left m1 in occlusal (A1, stereo pair) and oblique distolingual (A2) views. B. BMNH M 45557, paratype left m1 in occlusal view (stereo pair).

Fig. 9 in A new species of the plagiaulacoid multituberculate mammal Eobaatar from the Early Cretaceous of southern Britain

Fig. 9. Plagiaulacoid multituberculate Eobaatar clemensi sp. nov. from the Early Cretaceous Wessex Formation, Isle of Wight. Scanning electron micrographs of BMNH M 45483, a multituberculate left I3, in mesiolabial (A), lingual (B), and occlusal (C, stereo pair) views.

Fig. 2. A, B in A new species of the plagiaulacoid multituberculate mammal Eobaatar from the Early Cretaceous of southern Britain

Fig. 2. A, B. Multituberculate teeth from the Wessex Formation of the Isle of Wight tentatively referred by Butler and Ford (1975) to Loxaulax sp. A. Left m2 (part of SMNS 51981) in occlusal (A1), mesiolabial (A2), and distolabial (A3) views (hatched areas represent broken surfaces) (see also Fig. 8B). B. Left I2 (part of SMNS 51981) in labial (B1), mesial (B2), and occlusal (B3) views (see also Fig. 10C). C. For comparison, right I2 from Cliff End provisionally referred by Clemens (1963) to Loxaulax valdensis Simpson, 1928 in labial (C1) and lingual (C2) views.

Fig. 8 in A new species of the plagiaulacoid multituberculate mammal Eobaatar from the Early Cretaceous of southern Britain

Fig. 8. Plagiaulacoid multituberculate Eobaatar clemensi sp. nov. from the Early Cretaceous Wessex Formation, Isle of Wight. A. Scanning electron micrograph of BMHH M 45482 in occlusal view. B. Normal light photograph of the m2 part of SMNS 51981 in occlusal view, to show its possible relationship to m1(s) BMNH M 45482 and 45557 (it was not possible to obtain scanning electron micrographs of the specimen which was glued to card by the original collector).

Fig. 6 in A new species of the plagiaulacoid multituberculate mammal Eobaatar from the Early Cretaceous of southern Britain

Fig. 6. Outline drawing of the holotype specimen, BMNH M 45482, to show disposition of cusps and pits, and cusp abbreviations used in the text.

Fig. 5. A in A new species of the plagiaulacoid multituberculate mammal Eobaatar from the Early Cretaceous of southern Britain

Fig. 5. A phylogenetic tree for the Plagiaulacida. After Hahn and Hahn (2004) with amendments and additions. Geological time scale from Gradstein et al. 2004. Temporal distribution of taxa from Kielan−Jaworowska et al. 2004. Abbreviations for Jurassic and Cretaceous stages: Al, Albian; Ap, Aptian; Ba, Barremian; Be, Berriasian; Ce, Cenomanian; Ha, Hauterivian; J1–J2, Middle and Lower Jurassic; Ki, Kimmeridgian; Ox, Oxfordian; Ti, Tithonian; Va, Valanginian.