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12 results for “Palmatolepis”
Fig. 5 in Early Frasnian ostracods from the Arche quarry (Dinant Synclinorium, Belgium) and the Palmatolepis punctata Isotopic Event
Fig. 5. Early Frasnian ostracods from the access path to the Arche quarry, Dinant Synclinorium, Belgium. A. Bairdia (Orthobairdia) sp. B in Becker (1971). Carapace in right (A) and dorsal (A) views. Sample AR−06−23. IRScNB n° b5086. B. Bairdiacypris sp. B, aff. B. martinae Casier and Lethiers, 1997. Car1 2 apace in right (B) and dorsal (B) views. Sample AR−06−28. IRScNB n° b5087. C. Bairdiacypris sp. D. Poorly preserved carapace in right (C) and dorsal 1 2 1 (C) views. Sample AR−06−25. IRScNB n° b5088. D. Bairdiacypris sp. indet. Poorly preserved carapace in right (D) and dorsal (D) views. Sample 2 1 2 AR−06−28. IRScNB n° b5089. E. Bairdiacypris breuxensis Casier and Olempska, 2008. Carapace in right lateral view. Sample AR−06−26. IRScNB n° b5090. F. Acratia evlanensis Egorov, 1953. Poorly preserved carapace in right lateral view. Sample AR−06−23. IRScNB n° b5091. G. Acratia sp. indet. Carapace in right lateral view. Sample AR−06−27. IRScNB n° b5092. H. Schneideria groosae Becker, 1971. Carapace in right lateral view. Sample AR−06−28. IRScNB n° b5093. I–M. Cryptophyllus materni (Bassler and Kellett, 1934). I. Valve. Sample AR−06−26. IRScNB n° b5094. J. Valve. Sample AR−06−26. IRScNB n° b5095. K. Internal view of a valve. Sample AR−06−27. IRScNB n° b5096. L. Broken valve showing the stack of moults. Sample AR−06−26. IRScNB n° b5097. M. Carapace in dorsal view. Sample AR−06−27. IRScNB n° b5098. N. Cryptophyllus sp. A. Valve in lateral (N) and dorsal 1 (N) views. Sample AR−06−23. IRScNB n° b5099. Scale bars 200 µm.
Fig. 4 in Early Frasnian ostracods from the Arche quarry (Dinant Synclinorium, Belgium) and the Palmatolepis punctata Isotopic Event
Fig. 4. Early Frasnian ostracods from the access path to the Arche quarry, Dinant Synclinorium, Belgium. A. Jenningsina lethiersi Becker, 1971. Poorly preserved carapace in right lateral view. Sample AR−06−26. IRScNB n° b5071. B. Favulella lecomptei Becker, 1971. Carapace in right (B1) and dorsal (B2) views. Sample AR−06−26. IRScNB n° b5072. C. Bairdiocypris sp. 5 sensu Magne (1964). Poorly preserved carapace in right (C) and ventral (C) views. Sample 1 2 AR−06−17. IRScNB n° b5073. D, E. Bairdiocypris sp. C. D. Broken carapace in right lateral view. Sample AR−06−26. IRScNB n° b5074. E. Broken carapace in dorsal view. Sample AR−06−26. IRScNB n° b5075. F–J. Microcheilinella archensis sp. nov. F. Carapace in right lateral (F) and dorsal (F) views. Sample 1 2 AR−06−26. IRScNB n° b5076. G. Holotype. Carapace in right lateral view. Sample AR−06−27. IRScNB n° b5077. H. Carapace in right lateral view. Sample AR−06−28. IRScNB n° b5078. I. Ventral view of a carapace. Sample AR−06−27. IRScNB n° b5079. J. Anterior (J) and posterior (J) views of a carapace. Sam1 2 ple AR−06−28. IRScNB n° b5080. K. Healdianella? sp. B in Becker (1971). Carapace in right (K) and dorsal (K) views. Sample AR−06−28. IRScNB n° b5081. 1 2 L. Bairdia (Rectobairdia) paffrathensis Kummerow, 1953. Poorly preserved carapace in right lateral view. Sample AR−06−23. IRScNB n° b5082. M–O. Bairdia (Rectobairdia) chalonensis sp. nov. M. Holotype. Carapace in right lateral (M) and dorsal (M) views. Sample AR−06−23. IRScNB n° b5083. N. Carapace in 1 2 right lateral view. Sample AR−06−26. IRScNB n° b5084. O. Carapace in right lateral view. Sample AR−06−26. IRScNB n° b5085. Scale bars 200 µm.
Fig. 3 in Early Frasnian ostracods from the Arche quarry (Dinant Synclinorium, Belgium) and the Palmatolepis punctata Isotopic Event
Fig. 3. Early Frasnian ostracods from the access path to the Arche quarry, Dinant Synclinorium, Belgium. A, B. Refrathella incompta Becker, 1971. A. Carapace in right (A) and dorsal (A) views. Sample AR−06−28. IRScNB n° b5055. B. Left valve. Sample AR−06−26. IRScNB n° b5056. C–E. Uchtovia 1 2 materni Becker, 1971. C. Heteromorph carapace in left lateral view. Sample AR−06−26. IRScNB n° b5057. D. Heteromorph carapace in dorsal view. Sample AR−06−28. IRScNB n° b5058. E. Tecnomorph carapace in dorsal view. Sample AR−06−28. IRScNB n° b5059. F, G. Hypotetragona tremula Becker, 1971. F. Heteromorph carapace in left lateral view. Sample AR−06−23. IRScNB n° b5060. G. Tecnomorph carapace in dorsal view. Sample AR−06−28. IRScNB n° b5061. H–J. Scobicula gracilis sp. nov. H. Holotype. Carapace in left lateral (H) and dorsal (H) views. Sample AR−06−20. IRScNB n° b5062. 1 2 I. Carapace in left lateral view. Sample NI−07−136 from the Sourd d'Ave Member in the Nismes section. IRScNB n° b5063. J. Carapace in left lateral view. Sample NI−07−12 from the Chalon Member in the Nismes section. IRScNB n° b5064. K. Cavellina? sp. A. Carapace in left (K) and dorsal (K) views. Sam1 2 ple AR−06−26. IRScNB n° b5065. L–N. Plagionephrodes laqueus praelaqueus ssp. nov. L. Holotype. Carapace in right lateral (L) and dorsal (L) views. 1 2 Sample AR−06−27. IRScNB n° b5066. M. Internal view of right valve. Sample AR−06−17. IRScNB n° b5068. N. Internal view of left valve. Sample AR−06−18. IRScNB n° b5069. O. Plagionephrodes ineptus Becker, 1971. Carapace in right (O) and dorsal (O) views. Sample AR−06−28. IRScNB n° 1 2 b5070. Scale bar 200 µm.
Fig. 1 in Early Frasnian ostracods from the Arche quarry (Dinant Synclinorium, Belgium) and the Palmatolepis punctata Isotopic Event
Fig. 1. Locality map of the Arche quarry, the Lion quarry and the Frasnes railway section; the access path to the Arche quarry indicated by arrow.
Fig. 2 in Early Frasnian ostracods from the Arche quarry (Dinant Synclinorium, Belgium) and the Palmatolepis punctata Isotopic Event
Fig. 2. Lithologic sections of the Chalon Member and of the extreme base of the Arche Member exposed on the north−eastern side and on the south−eastern side of the access path to the Arche quarry.
Fig. 6 in Temporal dynamics of the geographic differentiation of Late Devonian Palmatolepis assemblages in the Prototethys
Fig. 6. Size (estimated by the zeroth harmonic of a Fourier analysis of the platform outline) and shape variations of Palmatolepis (Manticolepis) through Coumiac (France), Mrirt (Morocco), Xom Nha (Vietnam) and Thong Pha Phum (Thailand). Shape is estimated by the score on PC1 (25.5%) and by the score on PC1sf (24.4%). The symbols represent the average value per level; error bars correspond to the 95% confidence interval. The grey beld corresponds to the Upper Kellwasser (UKW). Open symbols: Frasnian; grey and black symbols: Famennian; circles = Coumiac, squares = Mrirt, triangles = Xom Nha, diamond = Thong Pha Phum. Grey boxes = the 3 time−slices.
Fig. 1 in Temporal dynamics of the geographic differentiation of Late Devonian Palmatolepis assemblages in the Prototethys
Fig. 1. Palaeogeographic map of the Late Devonian showing the location of the sections considered in the present study (after Scotese and McKerrow 1990; Scotese and Golonka 1992). Circle = Coumiac Upper Quarry (France), square = Mrirt (Morocco), triangle = Xom Nha (Vietnam), diamond = Thong Pha Phum (Thailand).
Fig. 5 in Temporal dynamics of the geographic differentiation of Late Devonian Palmatolepis assemblages in the Prototethys
Fig. 5. Differences in size and shape variance through time and space. A. Size distribution of the Palmatolepis (Manticolepis) elements per geographical region and per time slice. Each dot corresponds to a value. Size is estimated by the zeroth harmonic of a Fourier analysis of the platform outline. B. Shape distribution, of the Palmatolepis (Manticolepis) elements per geographical region and per time slice. Shape is estimated by the scores on PC1. Each dot corresponds to a value. C. Distribution of the size−free shape, estimated by the scores on PC1sf, of the Palmatolepis (Manticolepis) elements per geographical region and per time slice. Each dot represents single specimen; the grey beld corresponds to the Upper Kellwasser (UKW). Abbreviations: M, mean (Kruskall−Wallis); V, variance (Levene test).
Fig. 2 in Temporal dynamics of the geographic differentiation of Late Devonian Palmatolepis assemblages in the Prototethys
Fig. 2. Stratigraphical logs of the four compared sections, Coumiac (France), Mrirt (Morocco), Xom Nha (Vietnam) and Thong Pha Phum (Thailand). The studied levels are marked by a black circle. In gray, the dysoxic Kellwasser (UKW = Upper Kellwasser). Pa., Palmatolepis.
Fig. 3 in Temporal dynamics of the geographic differentiation of Late Devonian Palmatolepis assemblages in the Prototethys
Fig. 3. Upper view of a Palmatolepis (Manticolepis) element.
Dataset and script to: Morphometric variance, evolutionary constraints and their change through time in Late Devonian Palmatolepis conodonts
<p>Phenotypic variation is the raw material of evolution. Standing variation can facilitate response to selection along "lines of least evolutionary resistance", but selection itself might alter the structure of the variance. Shape was quantified using 2D geometric morphometrics in <i>Palmatolepis </i>conodonts through the Late Devonian period. Patterns of variance were characterized along the record by the variance-covariance matrix (P-matrix) and its first axis (Pmax). The Late Frasnian was marked by environmental oscillations culminating with the Frasnian/Famennian mass extinction. A shape response was associated with these fluctuations, together with a deflection of the Pmax and the P-matrix. Thereafter, along the Famennian, <i>Palmatolepis </i>mean shape shifted from broad elements with a large platform to slender elements devoid of platform. This shift in shape was associated with a reorientation of Pmax and the P-matrix, due to profound changes in the functioning of the elements selecting for new types of variants. Both cases provide empirical evidences that moving adaptive optimum can reorient phenotypic variation, boosting response to environmental changes. On such time scales, the question seems thus not to be whether the P-matrix is stable, but how it is varying in response to changes in selection regimes and shifts in adaptive optimum.</p>
Dataset and script to: Morphometric variance, evolutionary constraints and their change through time in Late Devonian Palmatolepis conodonts
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