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1,817 results for “Late Cretaceous”
Fig. 2 in Isolated theropod teeth associated with a sauropod skeleton from the Late Cretaceous Allen Formation of Río Negro, Patagonia, Argentina
Fig. 2. Abelisaurid tooth of Morphotype I (IIPG-02) from "Dino 1" site (S 39°08'; W 67°40'), Paso Córdoba locality, 14 km southwest of the town of General Roca, Río Negro Province; Allen Formation (middle Campanian–early Maastrichtian, Upper Cretaceous); in labial (A1), lingual (A2), mesial (A3), distal (A4), apical (A5), and basal (A6) views; detail of marginal undulations (A7); mesial (A8) and distal (A9) denticles at the apical three-fourths of the crown height; detail of the mesial denticles at the apical three-fourths of the crown height (A10). Abbreviations: cs, concave surfaces; mca, mesial carina; dca, distal carina; sps, spalled surface; ids, interdenticular sulcus; idsp; interdenticular space.
Fig. 20 in Late Cretaceous mega-, meso-, and microfloras from Lower Silesia
Fig. 20. Relative proportions of palynomorphs groups in the section RK-4, Rakowice Małe (A) and Żeliszów (B). Numbers on the left-hand side of the diagrams refer to distances (in cm) of samples from reference levels (see text for further explanation).
Fig. 15 in Late Cretaceous mega-, meso-, and microfloras from Lower Silesia
Fig. 15. Semi-schematic reconstructions of the presumed main forest-forming angiosperms in the Coniacian–Santonian of Lower Silesia, Poland. A. Dewalquea aff. gelindenensis de Saporta and Marion, 1873 (compare Fig. 12A, B). B. Platanites sp. 1 (compare Fig. 16C; lateral leaflets hypothetical, supposed similar to those of Platanites marginatus, see Johnson 1996: fig. 86). C. Dryophyllum westerhausianum (Richter, 1904) Halamski and Kvaček comb. nov. (compare Fig. 8C, E). D. Platanites willigeri Halamski and Kvaček, sp. nov. (compare Fig. 14A, C). E. Dewalquea insignis Hosius and von der Marck, 1880 (compare Fig. 10F). F, G. Ettingshausenia sp. 1 (compare Fig. 13G, D). Not to scale. Drawings by Bogusław Waksmundzki.
Fig. 13 in Late Cretaceous mega-, meso-, and microfloras from Lower Silesia
Fig. 13. Representatives of the platanoid Ettingshausenia from the North Sudetic Basin, Lower Silesia, Poland. A–C, E. Ettingshausenia cf. superstes (Velenovský, 1882) Kvaček and Halamski in Halamski and Kvaček, 2015, Assemblage 2 (Coniacian). A. Leaf fragment MB.Pb.2008/336, Zbylutów. B. Incomplete leaf MB.Pb.2008/333b, Wartowice; general view (B2), enlargement of the apical part (B1). C. Leaf fragment MB.Pb.2008/334, Zbylutów. E. Leaf fragment MB.Pb.2008/332, Zbylutów. D, F, G. Ettingshausenia sp. 1, Ulina, Assemblage 6 (Santonian?). D. Subcomplete leaf MB.Pb.2008/264. F. Incomplete leaf MGUWr 5616p. G. Incomplete leaf MB.Pb.2008/338.
Fig. 11 in Late Cretaceous mega-, meso-, and microfloras from Lower Silesia
Fig. 11. Taphonomy of the eudicot angiosperm Dewalquea insignis Hosius and von der Marck, 1880 from the North Sudetic Basin, Lower Silesia, Poland. A. Fragmentary compound leaf MB.Pb.2008/325.1, Bolesławiec, Assemblage 8 (Santonian); general view (A1) and enlargement of fragments of two leaflets to show venation and teeth (A2). B. Accumulation of leaflets (presumably from the same compound leaf) MGUWr 5639p accompanied by Salicites? sp. and unidentified vegetal remains, Ulina?, Assemblage 8? (Santonian?).
Fig. 9 in Late Cretaceous mega-, meso-, and microfloras from Lower Silesia
Fig. 9. Fagalean angiosperm Dryophyllum westerhausianum (Richter, 1904) Halamski and Kvaček comb. nov. from Ulina, North Sudetic Basin, Lower Silesia, Poland, Assemblage 6 (lower–middle Santonian). A. Fragmentary leaflet MGUWr 5619p showing venation and serration. B. Enlargements of venation of fragments of two leaflets MB.Pb.2008/339 (see the entire specimen in Fig. 8C). C. Probable trifoliolate leaf MB.Pb.2008/0342 with two fragmentarily preserved leaflets.
Fig. 7 in Late Cretaceous mega-, meso-, and microfloras from Lower Silesia
Fig. 7. Taphonomy of the fagalean angiosperm Dryophyllum westerhausianum (Richter, 1904) Halamski and Kvaček comb. nov. from Ulina, North Sudetic Basin, Lower Silesia, Poland, Assemblage 6 (lower–middle Santonian). A. Three leaflets (arrows indicate the two largest ones possibly from the same leaf) and several incomplete or fragmentary Laurophyllum? sp. MB.Pb.2008/347. B. Four fragmentarily preserved leaflets (arrows indicate the two largest ones possibly belonging to the same leaf) MGUWr 5617p.
Fig. 19 in Late Cretaceous mega-, meso-, and microfloras from Lower Silesia
Fig. 19. Spores (A–G, K, N–O) and pollen (H–J, L–M, P) from the North Sudetic Basin, Lower Silesia, Poland, Palynoassemblage B (lower–mid- dle Santonian). A. Cingutriletes clavus Dettmann, 1963, borehole KB18, depth 42.3 m. B. Echinatisporis sp., borehole KB18, depth 42.3 m. C. Baculatisporites parvopunctatus Weyland and Greifeld, 1953, borehole KB18, depth 29.8 m. D. Cicatricosisporites potomacensis Brenner, 1963, borehole KB13, depth 88.6 m. E. Klukisporites pseudoreticulatus Couper, 1958, borehole KB13, depth 94.5 m. F. Trilobosporites sp., borehole KB18, depth 38.3 m. G. Distaltriangulisporites perplexus (Singh, 1964) Singh, 1971, borehole KB13, depth 94.5 m. H. Catinipollis lwowekensis RanieckaBobrowska, 1984, holotype (slide 13/11, 48.5/110.2; repository unknown), borehole KB18, depth 35.0 m; equatorial focal plane (H1), focal plane on the surface (H2). I. Cerebropollenites mesozoicus (Couper, 1958) Nilsson, 1958, borehole KB17, depth 47.5 m. J. aff. Pecakipollis sp., borehole KB8, depth 77.5 mm. K. Clavifera cf. triplex (Bolkhovitina, 1953) Bolkhovitina, 1966, borehole KB13, depth 28.6 m. L. Piolencipollis sp., borehole KB16, depth 99 m; specimen illustrated by Raniecka-Bobrowska (1984, 1989: pl. 218: 2). M. Ephedripites virginiaensis Brenner, 1963, borehole KB18, depth 39.3 m. N. Cicatricosisporites dorogensis Potonié and Gelletich, 1933, borehole KB17, depth 38.0 m. O. Foveogleicheniidites sp., borehole KB18, depth 38.3 m. P. Podocarpidites sp., borehole KB8, depth 84.3 m. Photographs from the unpublished report by Raniecka-Bobrowska (1968).
Fig. 3 in Late Cretaceous mega-, meso-, and microfloras from Lower Silesia
Fig. 3. SEM micrographs of sporangia and spores of Konijnenburgia cf. galleyi (Miner, 1935) Kvaček and Dašková, 2010; MB.Pb.2008/372, Żerkowice, North Sudetic Basin, Lower Silesia, Poland, Assemblage 4 (upper Coniacian?–lower Santonian?). A. Complete sporangium (A1), transverse section of a sporangium showing sporangial walls surrounding spores (A2), sporangium fragment showing thickly cutinised cells of the annulus (arrow) (A3).
Fig. 4 in Late Cretaceous mega-, meso-, and microfloras from Lower Silesia
Fig. 4. Late Coniacian?–early Santonian? ferns from the North Sudetic Basin, Lower Silesia, Poland. A. Cladophlebis? sp. 2, fragment of a pinna MGUWr 7556p, Żeliszów, Assemblage 5. B. Cladophlebis sp. 1, fragment of a pinna MB.Pb.2018/0067, Rakowice Małe, Assemblage 5. C. Coniopteris? sp., fragment of a pinna MB.Pb.2018/0006 (rachis arrowed), Rakowice Małe, Assemblage 5. D–G. Konijnenburgia cf. galleyi (Miner, 1935) Kvaček and Dašková, 2010, Assemblage 4. D. Fragment of a pinna MB.Pb.2018/0062, Rakowice Małe. E. Accumulation of isolated pinnules MB.Pb.2008/373.2a (E1) and enlargement of a pinnule with sori (E2), Żerkowice. F. Two isolated pinnules MB.Pb.2008/373.1 (F1) and enlargement of the longest pinnule in the studied material with sori (F2), Żerkowice. G. Fragment of a pinna MB.Pb.2008/373.2b, Żerkowice.
Fig. 1 in Late Cretaceous mega-, meso-, and microfloras from Lower Silesia
Fig. 1. Geographic, palaeogeographic, and geologic context of the studied flora. A. Late Cretaceous palaeogeography of Central and Northern Europe after Ron Blakey from Csiki-Sava et al. 2015, modified after data in Chatziemmanouil 1982; Surlyk in Voigt et al. 2008; Halamski 2013; Halamski et al. 2016). The red asterisk shows the presumed position of the studied flora. ESI, East Sudetic Island; WSI, West Sudetic Island. B. Geographical location of the study area in Central Europe. C. Bedrock geological map of northern Silesia (pre-Cenozoic redrawn, simplified and partly corrected after Kozdrój et al. 2001; Cenozoic simplified after Sawicki 1966, 1995) with approximate locations of early, early middle, and late Coniacian palaeoshores (after Leszczyński 2018: fig. 40A, B, D). The studied localities (see Appendix 1) are shown by asterisks, black for those whose location is known in detail, white for those for which a precise location cannot be given.
Fig. 6 - Amazighopsis cretacica n. gen., n in Amazighopsidae, a new family of decapod macruran astacideans from the late Cretaceous (Cenomanian-Turonian) of Gara Sbaa, Southeastern Morocco
Fig. 6 - Amazighopsis cretacica n. gen., n. sp. A) reconstruction. B) close-up of the occlusal margins of P1 chela.
Fig. 4 - Amazighopsis cretacica n. gen., n in Amazighopsidae, a new family of decapod macruran astacideans from the late Cretaceous (Cenomanian-Turonian) of Gara Sbaa, Southeastern Morocco
Fig. 4 - Amazighopsis cretacica n. gen., n. sp., MSNM i27545, close-up of the telson without diaeresis and with movable spines on lateral margin (arrows) and uropodal exopod without diaeresis (x 6.81).
Fig. 2 - Amazighopsis cretacica n. gen., n in Amazighopsidae, a new family of decapod macruran astacideans from the late Cretaceous (Cenomanian-Turonian) of Gara Sbaa, Southeastern Morocco
Fig. 2 - Amazighopsis cretacica n. gen., n. sp., MSNM i27546, Paratype. A) General view in natural light (x 1.23). B) General view in UV light (x 1.12).
Fig. 1 - Amazighopsis cretacica n. gen., n in Amazighopsidae, a new family of decapod macruran astacideans from the late Cretaceous (Cenomanian-Turonian) of Gara Sbaa, Southeastern Morocco
Fig. 1 - Amazighopsis cretacica n. gen., n. sp., MSNM i27545, Holotype. A) General view in natural light (x 1.51). B) General view in UV light (x 1.44).
Fig. 3 - Amazighopsis cretacica n. gen., n in Amazighopsidae, a new family of decapod macruran astacideans from the late Cretaceous (Cenomanian-Turonian) of Gara Sbaa, Southeastern Morocco
Fig. 3 - Amazighopsis cretacica n. gen., n. sp., MSNM i27646, Paratype. A) General view in natural light (x 2). B) General view in UV light (x 1.71).
FIGURE 3 in A multicarpellate fruit from Late Cretaceous sediments of South Bohemia, Czech Republic
FIGURE 3. Schematic line drawings of the gynoecium of Covidifructus multicarpellatus. (A) Longitudinal median section through the gynoecium showing its complex internal morphology with a remaining floral apex and an empty space (asterisk) in the centre of the ovary; arrowheads indicate stigma positions; grey shaded areas indicate potential stigmatic secretion forming an extra-gynoecial compitum across neighbouring stigmas; pollen grains and hypothetical pathways of pollen tubes are given in orange; dashed orange line indicates hypothetical pathway of pollen tube reaching a stigma via growth through the extra-gynoecial compitum; dashed black line indicates area of postgenital carpel union in the centre of the ovary (symplicate region); arrows indicate area of irregular ovary closure shown in (B); placentation is axile with the seeds (green) attached in the distalmost part of the ovary. (B) Line drawing showing zone ovary closure (see also Figure 1C, F) as seen from above, radial lines correspond to ventral slits of individual carpels; carpel flanks meet in an irregular pattern in the centre of the gynoecium; the area of closure is flattened (compressed; indicated by dashed ellipse), and the 10 carpels are roughly arranged in a double row facing each other (dashed line in centre of figure) rather than in a smooth circle.
FIGURE 2 in A multicarpellate fruit from Late Cretaceous sediments of South Bohemia, Czech Republic
FIGURE 2. Covidifructus multicarpellatus gen. et sp. nov. specimen No. NMP F3200, scale bars equal 300 µm in all figures, series of microCT sections of premature capsular fruit. (A) Volume rendering of fruit in lateral view; lines B-F indicate approximate levels of transverse sections shown in the following images. (B) Transverse section at the level of styles and stigmas. (C) Transverse section at the level of the symplicate zone of the gynoecium where the carpels are postgenitally united in the centre of the ovary; distalmost parts of locules and seeds are visible. (D) Transverse section at the level of the empty space (asterisk) where carpels do not meet in the centre of the ovary. (E) Transverse section at the level of the synascidiate zone of the gynoecium, i.e., below the enclosed floral apex and the empty space. (F) Transverse section through the very base of the fruit showing the basal-most parts of the locules. (G) Longitudinal median section showing empty space in the centre of the ovary (asterisk) and axile ovule/seed attachment (arrow) in the distalmost part of the ovary. (H) Longitudinal tangential section with one seed rendered and coloured in green. (I) Transverse section at the level of seed attachment in the distal part of the ovary, with one seed rendered and coloured in green.
FIGURE 1 in A multicarpellate fruit from Late Cretaceous sediments of South Bohemia, Czech Republic
FIGURE 1. Covidifructus multicarpellatus gen. et sp. nov.; specimen No. NMP F3200; scale bars equal 100 µm in all figures. (A) Small premature capsular fruit in lateral view, semi-globose in overall shape; SEM. (B) Fruit seen in apical view; note preformed dorsal lines of fruit dehiscence; SEM. (C) Close-up of fruit apex showing styles and stigmatic areas (asterisks); note irregular closure of ovary in the very centre; SEM. (D) MicroCT volume rendering, lateral view, showing 10 elongate seeds (green), one seed per carpel. (E) MicroCT volume rendering, apical view, showing regular arrangement of carpels and seeds. (F) Detail of central ovary closure (dashed line); note that some of the carpel flanks (arrowheads) do not extend to the very centre of the closure zone; SEM.
FIGURE 1 in Dental ecomorphology and macroevolutionary patterns of North American Late Cretaceous metatherians
FIGURE 1. Phylogenetic tree of our extant comparative sample generated using TimeTree (www.timetree.org; Kumar et al., 2017).
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