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Journal Article

Conostoma chappellicum n. sp., lagenostomalean ovules from Kentucky Free

Sara P. Stubblefield, Gar W. Rothwell
Published: 01 September 1980
Journal of Paleontology (1980) 54 (5): 1012–1016.
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Journal Article

On the structural similarity of the Paleozoic ovules Conostoma platyspermum and C. Leptospermum Free

G. W. Rothwell, T. N. Taylor, C. Clarkson
Published: 01 January 1979
Journal of Paleontology (1979) 53 (1): 49–54.
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Hooked stems and cardiocarpalean ovules from the Shanjiaoshu tuff assemblage. Scale bars = 1 mm unless otherwise stated. (a) Longitudinal section of an axis (stem or rachis?) covered with prominent sharp sclerotic ennations, interpreted as a gigantopterid. Gui-Tuf.1.19. (b) Enlargement of ennations from Figure 5a. (c) Peel of large ovule in near longitudinal section with thick integument and large, circular glands towards the outside of the sarcotesta. Gui-Tuf.1.20. (d) Wafer of large ovule in longitudinal section with thick integument, large circular hemispherical concavities showing former position of glands, and distal commissure (arrow). Gui-Tuf.1.21. (e–g) Serial wafered sections though distal apex of incomplete ovule showing thick but irregularly margined integument, and prominent commissure; (e) Gui-Tuf.1.22, (f) Gui-Tuf.1.23, (g) Gui-Tuf.1.24; all scale bars = 2 mm. (h) Partially fragmented non-glandular cardiocarpalean ovule with thin integument and preserved nucellus. Gui-Tuf.1.25. (i) Non-glandular cardiocarpalean ovule with thin integument and cellular megagametophyte. Gui-Tuf.1.26. (j) Transverse section of ovule with thin integument and lateral ribs containing single, terete vascular bundles. Gui-Tuf.1.27. (k) Ovule with thin integument and partial geopetal in-fill of the integumentary cavity. Gui-Tuf.1.28.

Hooked stems and cardiocarpalean ovules from the Shanjiaoshu tuff assemblag... Available to Purchase

Published: 01 November 2004
Figure 5. Hooked stems and cardiocarpalean ovules from the Shanjiaoshu tuff assemblage. Scale bars = 1 mm unless otherwise stated. (a) Longitudinal section of an axis (stem or rachis?) covered with prominent sharp sclerotic ennations, interpreted as a gigantopterid. Gui-Tuf.1.19. (b) Enlargement
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Examples of glossopterid ovulate genera found in Antarctica. A) Plumsteadia ovata, a multiovulate morphology and the most common ovulate organ found across Antarctica. B) A new genus collected during the 2012 Antarctic field season with Ottokaria-like (multiovulate) morphological features. C) Lidgettoniopsis ramulus, a newly described genus from the central Transantarctic Mountains, with scale-leaf morphology. All scale bars  =  5 mm.

Examples of glossopterid ovulate genera found in Antarctica. A) Plumsteadi... Available to Purchase

Published: 01 July 2013
FIGURE 1— Examples of glossopterid ovulate genera found in Antarctica. A) Plumsteadia ovata , a multiovulate morphology and the most common ovulate organ found across Antarctica. B) A new genus collected during the 2012 Antarctic field season with Ottokaria -like (multiovulate) morphological
Journal Article

ON PALEOZOIC PLANTS FROM MARINE STRATA: HEXALOBA FINISENSIA NEW GENUS AND SPECIES, A TRIGONOCARPALEAN OVULE FROM THE VIRGILIAN (UPPER PENNSYLVANIAN: GZHELIAN) FINIS SHALE OF TEXAS Available to Purchase

MICHAEL T. DUNN, GENE MAPES, GAR W. ROTHWELL
Published: 01 January 2002
Journal of Paleontology (2002) 76 (1): 173–180.
DOI: https://doi.org/10.1666/0022-3360(2002)076<0173:OPPFMS>2.0.CO;2
...MICHAEL T. DUNN; GENE MAPES; GAR W. ROTHWELL Abstract Twenty permineralized ovules were recovered from a mixed marine and terrestrial assemblage from the Finis Shale near Jacksboro, Texas, USA. The strata have been dated as Virgilian (upper Pennsylvanian: Gzhelian) based on ammonoid biostratigraphy...
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View PDF for article title, ON PALEOZOIC PLANTS FROM MARINE STRATA: HEXALOBA FINISENSIA NEW GENUS AND SPECIES, A TRIGONOCARPALEAN <span class="search-highlight">OVULE</span> FROM THE VIRGILIAN (UPPER PENNSYLVANIAN: GZHELIAN) FINIS SHALE OF TEXAS
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Journal Article

ANTARCTICA: ENHANCING THE LINKS ACROSS TIME AND SPACE OF THE PERMIAN GLOSSOPTERIDS Available to Purchase

PATRICIA E. RYBERG
Journal: PALAIOS
Published: 01 July 2013
PALAIOS (2013) 28 (7): 415–417.
DOI: https://doi.org/10.2110/palo.2013.SO4
...FIGURE 1— Examples of glossopterid ovulate genera found in Antarctica. A) Plumsteadia ovata , a multiovulate morphology and the most common ovulate organ found across Antarctica. B) A new genus collected during the 2012 Antarctic field season with Ottokaria -like (multiovulate) morphological...
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View PDF for article title, ANTARCTICA: ENHANCING THE LINKS ACROSS TIME AND SPACE OF THE PERMIAN GLOSSOPTERIDS
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Journal Article

An Upper Permian permineralized plant assemblage in volcaniclastic tuff from the Xuanwei Formation, Guizhou Province, southern China, and its palaeofloristic significance Available to Purchase

JASON HILTON, WANG SHI-JUN, JEAN GALTIER, IAN GLASSPOOL, LIL STEVENS
Published: 01 November 2004
Geological Magazine (2004) 141 (6): 661–674.
DOI: https://doi.org/10.1017/S0016756804009847
...Figure 5. Hooked stems and cardiocarpalean ovules from the Shanjiaoshu tuff assemblage. Scale bars = 1 mm unless otherwise stated. (a) Longitudinal section of an axis (stem or rachis?) covered with prominent sharp sclerotic ennations, interpreted as a gigantopterid. Gui-Tuf.1.19. (b) Enlargement...
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View PDF for article title, An Upper Permian permineralized plant assemblage in volcaniclastic tuff from the Xuanwei Formation, Guizhou Province, southern China, and its palaeofloristic significance
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Common angiosperm tree samples. (A) Alnus ovulate cones type 2 UWBM 97688. (B) Alnus parvifolia leaf UWBM 97669. (C) Alnus ovulate cones type 1 UWBM 97670. (D) Betula leopoldae leaf UWBM 97671. (E) Fagus langevinii leaf UWBM 97593. (F) Fagus langevinii cupule UWBM 97583. (G) Fagus langevinii nut UWBM 97590. (H) Ulmus leaf UWBM 97672. (I) Ulmus branch with fruits UWBM 97673.

Common angiosperm tree samples. (A)  Alnus ovulate cones type 2 UWBM 97688... Available to Purchase

Published: 11 March 2005
Plate 2. Common angiosperm tree samples. (A)  Alnus ovulate cones type 2 UWBM 97688. (B)  Alnus parvifolia leaf UWBM 97669. (C)  Alnus ovulate cones type 1 UWBM 97670. (D)  Betula leopoldae leaf UWBM 97671. (E)  Fagus langevinii leaf UWBM 97593. (F)  Fagus langevinii cupule UWBM 97583. (G
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Table 1 —Comparison of trigonocarpalean ovule genera Available to Purchase

Published: 01 January 2002
Table 1 —Comparison of trigonocarpalean ovule genera
Journal Article

Three-dimensional visualization of fossil flowers, fruits, seeds, and other plant remains using synchrotron radiation X-ray tomographic microscopy (SRXTM): new insights into Cretaceous plant diversity Available to Purchase

Else Marie Friis, Federica Marone, Kaj Raunsgaard Pedersen, Peter R. Crane, Marco Stampanoni
Published: 01 July 2014
Journal of Paleontology (2014) 88 (4): 684–701.
DOI: https://doi.org/10.1666/13-099
... placenta in longitudinal section bearing tiny, densely crowded ovules; pyrite infilling in the tissues is seen as lighter yellow regions; dataset acquired using 10× objective and a 20 μm thick LAG:Ce scintillator at 12 keV (voxel size 0.74); 6 , 7 , 3-D SRXTM reconstruction of placenta region of flower...
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View PDF for article title, Three-dimensional visualization of fossil flowers, fruits, seeds, and other plant remains using synchrotron radiation X-ray tomographic microscopy (SRXTM): new insights into Cretaceous plant diversity
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Three-dimensional (1, 2, 4–6) and 2-D (3) SRXTM reconstructions of the lignitized flower Monetianthus mirus (S122015) from the Early Cretaceous Vale de Agua locality, Portugal; dataset acquired using 4× objective and a 20 μm thick YAG:Ce scintillator at 10 keV (voltex size 1.85 μm); specimen gold coated and studied by SEM prior to the SRXTM analysis; manipulation with Avizo software highlight the gold cover that has higher density than the coalified tissue; 1, 2, 3-D surface rendering of fossil in two different lateral views showing scars from perianth and androecium; 3, 3-D surface rendering of selected ovules superimposed on an 2-D orthoslice showing anatropous ovules with thin funicles directed towards the septum (laminar placentation); 4–6, 3-D reconstructions combining cut voltex (transparent rendering) and surface rendering of fossil in two different lateral views (4, 5) and in apical view (6) showing syncarpous ovary with many small ovules that do not fill the ovary cavity, section in 4 between orthoslices yz380 and 320, section in 5 between orthoslices xz720–750 and section in 6 between xy620–670. Scale bars for 1, 2, 4–6=500 μm; for 3=250 μm.

Three-dimensional ( 1 , 2 , 4–6 ) and 2-D ( 3 ) SRXTM reconstructions of ... Available to Purchase

Published: 01 July 2014
; 3 , 3-D surface rendering of selected ovules superimposed on an 2-D orthoslice showing anatropous ovules with thin funicles directed towards the septum (laminar placentation); 4–6 , 3-D reconstructions combining cut voltex (transparent rendering) and surface rendering of fossil in two different
Image
Petriellales (C) and Corystospermales (reproductive, A–B; D–E) from the Triassic of Antarctica. A–C  =  permineralizations from Fremouw Peak. A) Transverse section of permineralized cupule of Umkomasia resinosa with a single ovule inside and cupule stalk (below). 11,323 DE #88; scale  =  1 mm. B) Pteruchus fremouwensis. Longitudinal section through an axis (left) with attached, stalked microsporophyll-bearing pollen sacs. 10,145 D side 5a; scale  =  4 mm. C) Petriellaea triangulata. Transverse section of cupule showing three ovules. 10,023 A #17; scale  =  0.5 mm. D) Pteruchus sp. showing three microsporophylls. Allan Hills, T 11 330A; scale  =  5 mm. E) Umkomasia uniramia stalk bearing three cupules; pieces of Dicroidium foliage. Alfie's Elbow, T 12 1033; scale  =  1 cm.

Petriellales (C) and Corystospermales (reproductive, A–B; D–E) from the Tri... Available to Purchase

Published: 01 September 2011
FIGURE 8 Petriellales (C) and Corystospermales (reproductive, A–B; D–E) from the Triassic of Antarctica. A–C  =  permineralizations from Fremouw Peak. A) Transverse section of permineralized cupule of Umkomasia resinosa with a single ovule inside and cupule stalk (below). 11,323 DE #88; scale
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Plant-bearing tuffaceous sediment and unidentifiable plant remains from Shanjiaoshu coal mine. Scale bars = 1 mm unless otherwise stated. (a) Tuff block before preparation showing sedimentary layering and the plant debris horizon. Arrows indicate individual ovules. Scale bar = 10 mm. (b) Transmitted light image of tuffaceous sediment. Gui-Tuf.1.1. (c) Wafered section showing anatomically preserved plant fossils to be matrix supported within the tuffaceous sediment, and with ovule showing geopetal in-fill indicating way-up structure (orientating way-up in Fig. 2a). Arrow points to degraded foliar tissues. Gui-Tuf.1.4; scale bar = 2 mm. (d) Transmitted light image of unidentifiable secondary xylem lacking diagnostic features to allow its affinity to be more clearly identified. Gui-Tuf.1.3.

Plant-bearing tuffaceous sediment and unidentifiable plant remains from Sha... Available to Purchase

Published: 01 November 2004
Figure 2. Plant-bearing tuffaceous sediment and unidentifiable plant remains from Shanjiaoshu coal mine. Scale bars = 1 mm unless otherwise stated. (a) Tuff block before preparation showing sedimentary layering and the plant debris horizon. Arrows indicate individual ovules. Scale bar = 10 mm
Journal Article

TRIASSIC FLORAS OF ANTARCTICA: PLANT DIVERSITY AND DISTRIBUTION IN HIGH PALEOLATITUDE COMMUNITIES Available to Purchase

IGNACIO H. ESCAPA, EDITH L. TAYLOR, RUBÉN CÚNEO, BENJAMIN BOMFLEUR, JULIE BERGENE, RUDOLPH SERBET, THOMAS N. TAYLOR
Journal: PALAIOS
Published: 01 September 2011
PALAIOS (2011) 26 (9): 522–544.
DOI: https://doi.org/10.2110/palo.2010.p10-122r
...FIGURE 8 Petriellales (C) and Corystospermales (reproductive, A–B; D–E) from the Triassic of Antarctica. A–C  =  permineralizations from Fremouw Peak. A) Transverse section of permineralized cupule of Umkomasia resinosa with a single ovule inside and cupule stalk (below). 11,323 DE #88; scale...
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View PDF for article title, TRIASSIC FLORAS OF ANTARCTICA: PLANT DIVERSITY AND DISTRIBUTION IN HIGH PALEOLATITUDE COMMUNITIES
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Shifting functional roles and the evolution of conifer pollen-producing and seed-producing cones Available to Purchase

Andrew Leslie
Journal: Paleobiology
Published: 01 November 2011
Paleobiology (2011) 37 (4): 587–602.
DOI: https://doi.org/10.1666/10049.1
... in the combined character set, and these describe specific features of the microsporophyll and microsporangial attachment. Seven of the 27 seed-cone specific characters are not present in the combined character set, and these describe unique features of seed cone morphology as well as aspects of ovule morphology...
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Palynological diversity of some species of Coussareeae (Rubiaceae) from the Atlantic Forest, Brazil Available to Purchase

Vania Gonçalves-Esteves, Gabrielle Reboredo Menezes Vieira, Simone Cartaxo-Pinto, Claudia Barbieri Ferreira Mendonça
Journal: Palynology
Published: 28 April 2023
Palynology (2023) 47 (2): 2139777.
DOI: https://doi.org/10.1080/01916122.2022.2139777
... in their morphological characteristics, such as solitary ovules. The tribe Coussareeae constitutes the largest basal clade of the subfamily Rubioideae, and most of its genera are well represented in Brazil. The tribe is resolved into three suprageneric clades, including the Coccocypselum and Coussarea-Faramea clades...
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View PDF for article title, Palynological diversity of some species of Coussareeae (Rubiaceae) from the Atlantic Forest, Brazil
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Beyond Heterochrony: The Evolution of Development Available to Purchase

Norm MacLeod
Published: 01 March 2003
Journal of Paleontology (2003) 77 (2): 401–405.
DOI: https://doi.org/10.1666/0022-3360(2003)077<0401:>2.0.CO;2
... presence in this book seems something of a necessity since heterotopy occupies a central position in the mostly male theory. This theory—actually a scenario—holds that flowers originated as a series of gymnosperm microsporophylls grouped together along the plant's stem. The female ovule antecedent would...
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Journal Article

CONIFER POLLEN CONES FROM THE CRETACEOUS OF ARKANSAS: IMPLICATIONS FOR DIVERSITY AND REPRODUCTION IN THE CHEIROLEPIDIACEAE Available to Purchase

BRIAN J. AXSMITH, MICHAEL KRINGS, KATHERINE WASELKOV
Published: 01 February 2004
Journal of Paleontology (2004) 78 (2): 402–409.
DOI: https://doi.org/10.1666/0022-3360(2004)078<0402:CPCFTC>2.0.CO;2
... development ( Taylor and Alvin, 1984 ) of the Cheirolepidiaceae. Pseudofrenelopsis parceramosa shoots with attached and associated pollen cones, associated ovulate cones, and silicified wood were found in the Holly Creek Formation of southeastern Arkansas. However, this occurrence is poorly known...
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Conifer examples. (A) Cunninghamia foliage (juvenile) UWBM 97604. (B) Cunninghamia foliage (mature) UWBM 97626. (C) Cunninghamia ovulate cone UWBM 97664. (D) Cunninghamia? Staminate cones UWBM 97665. (E) Thuja foliage and cones UWBM 97666. (F) Chamaecyparis foliage and cones UCCIPRL 18F1090. (G) Unidentified Taxaceous foliage UWBM 97667.

Conifer examples. (A)  Cunninghamia foliage (juvenile) UWBM 97604. (B)  Cu... Available to Purchase

Published: 11 March 2005
Plate 1. Conifer examples. (A)  Cunninghamia foliage (juvenile) UWBM 97604. (B)  Cunninghamia foliage (mature) UWBM 97626. (C)  Cunninghamia ovulate cone UWBM 97664. (D)  Cunninghamia ? Staminate cones UWBM 97665. (E) Thuja foliage and cones UWBM 97666. (F) Chamaecyparis foliage and cones
Journal Article

Pharmaco-Chemical Analysis and in Vivo Toxicity Assays of Edible Clays Mined in Nigeria and Consumed Globally Available to Purchase

Joy I. Odimegwu, Florence E. Nkemehule, Esther Jane-Sharon Eke, Jumoke Okunnuga, Aminat Omolara Buhari, Sarah Ngozichukwu Okwuegbuna, Chidinma Romanda Duru
Published: 01 April 2021
Clays and Clay Minerals (2021) 69 (2): 155–166.
DOI: https://doi.org/10.1007/s42860-021-00111-2
... – Section of ovary: sections of ovarian tissue show show follicles at varying stages of development and corpora lutea (indicating ovulation). No abnormalities seen. H – Section of large intestine: section of tissue shows viable muscularis propria wall and mucosal lining cells. No abnormalities seen. I...
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View PDF for article title, Pharmaco-Chemical Analysis and in Vivo Toxicity Assays of Edible Clays Mined in Nigeria and Consumed Globally
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