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Xenopus laevis

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Journal Article

THE ANATOMY OF NONBIOMINERALIZED CHORDATE FOSSILS: INSIGHTS FROM EXPERIMENTAL DECAY OF XENOPUS LAEVIS TADPOLES Available to Purchase

RAGNA REDELSTORFF, PATRICK J. ORR
Journal: PALAIOS
Published: 01 April 2015
PALAIOS (2015) 30 (4): 335–351.
DOI: https://doi.org/10.2110/palo.2014.050
... only a subset of those originally present. How taphonomic processes impacted on the anatomy of fossils can be constrained by experimental decay of extant analogues. We experimentally decayed tadpoles of Xenopus laevis to document the rate at which various nonbiomineralized tissues degrade and identify...
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View PDF for article title, THE ANATOMY OF NONBIOMINERALIZED CHORDATE FOSSILS: INSIGHTS FROM EXPERIMENTAL DECAY OF <span class="search-highlight">XENOPUS</span> <span class="search-highlight">LAEVIS</span> TADPOLES
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SEM images of the nerve cord of a Xenopus laevis tadpole. A) Nerve cord with hole and longitudinal external texture on sheath. B) Nerve cord showing longitudinal texture on exterior of the sheath and fibrous core. For abbreviations see Figure 7.

SEM images of the nerve cord of a Xenopus laevis tadpole. A ) Nerve cord... Available to Purchase

Published: 01 April 2015
Fig. 11.— SEM images of the nerve cord of a Xenopus laevis tadpole. A ) Nerve cord with hole and longitudinal external texture on sheath. B ) Nerve cord showing longitudinal texture on exterior of the sheath and fibrous core. For abbreviations see Figure 7 .
Journal Article

Maturation experiments reveal bias in the chemistry of fossil melanosomes Open Access

Valentina Rossi, Samuel M. Webb, Maria McNamara
Journal: Geology
Published: 22 March 2021
Geology (2021) 49 (7): 784–788.
DOI: https://doi.org/10.1130/G48696.1
... skin and liver of the African clawed frog Xenopus laevis . After maturation in Cu-rich media, the metal chemistry of melanosomes from these tissues converged toward a common composition, and original differences in Cu oxidation state were lost. Elevated Cu concentrations and a pervasive Cu(II) signal...
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Figure 2. Anatomical interpretations of tadpoles. A, Palaeobatrachus hauffianus (Fraas, 1909), tadpole in dorsal view. SMNS 80015. B1, Palaeobatrachus hauffianus (Fraas, 1909), head of a tadpole in dorsal view. SMNS 80017. B2, Same specimen as in B1, ventral view. C, Palaeobatrachus sp., tadpole at the beginning of metamorphosis in dorsal view. NMP Pb 1697. Late Oligocene, Bechlejovice, Czech Republic. D, Palaeobatrachus sp., tadpole at the beginning of metamorphosis in dorsal view. NMP Pb 1696. Late Oligocene, Bechlejovice, Czech Republic. E1, Head of a tadpole of Xenopus laevis, NF stage 60. DZ FNSP XL60-ex2. E2, A tadpole of Xenopus laevis, NF stage 60. Same specimen as in E1. Scale bars in all pictures, 10 mm

Figure 2. Anatomical interpretations of tadpoles. A, Palaeobatrachus hauf... Available to Purchase

Published: 01 December 2006
., tadpole at the beginning of metamorphosis in dorsal view. NMP Pb 1697. Late Oligocene, Bechlejovice, Czech Republic. D, Palaeobatrachus sp., tadpole at the beginning of metamorphosis in dorsal view. NMP Pb 1696. Late Oligocene, Bechlejovice, Czech Republic. E1, Head of a tadpole of Xenopus laevis , NF
Image
Box plots of micro-synchrotron rapid scanning–X-ray fluorescence analysis (micro-SRS-XRF) data for untreated and matured melanosomes from the frog Xenopus laevis skin and liver. DD—distilled deionized water; Cu—Cu-solution.

Box plots of micro-synchrotron rapid scanning–X-ray fluorescence analysis (... Open Access

Published: 22 March 2021
Figure 1. Box plots of micro-synchrotron rapid scanning–X-ray fluorescence analysis (micro-SRS-XRF) data for untreated and matured melanosomes from the frog Xenopus laevis skin and liver. DD—distilled deionized water; Cu—Cu-solution.
Image
Linear discriminant analysis (LDA) of micro-synchrotron rapid scanning–X-ray fluorescence analysis (micro-SRS-XRF) data for melanosomes from the frog Xenopus laevis skin and liver. Data are highlighted for untreated melanosomes (untr.; A, B) and melanosomes matured in distilled deionized (DD) water (A) and in Cu solution (Cu; B). Gray circle is biplot showing contribution of each element (vectors) to separation of groups. Wilk's lambda test = 0.03.

Linear discriminant analysis (LDA) of micro-synchrotron rapid scanning–X-ra... Open Access

Published: 22 March 2021
Figure 2. Linear discriminant analysis (LDA) of micro-synchrotron rapid scanning–X-ray fluorescence analysis (micro-SRS-XRF) data for melanosomes from the frog Xenopus laevis skin and liver. Data are highlighted for untreated melanosomes (untr.; A, B) and melanosomes matured in distilled
Image
Copper X-ray absorption near edge structure spectroscopy (XANES) analyses of experimental data. (A) Spectra of Cu foil, Loligo (squid) melanin (modified from Rogers et al., 2019), and untreated and matured melanosomes from Xenopus laevis (frog) skin and liver. (B) Averaged spectra of samples and standard deviation. (C) Linear combination fitting (LCF) of matured samples; residuals were used to identify Cu(I) peaks. DD—distilled deionized water; Cu—Cu solution; untr.—untreated.

Copper X-ray absorption near edge structure spectroscopy (XANES) analyses o... Open Access

Published: 22 March 2021
Figure 3. Copper X-ray absorption near edge structure spectroscopy (XANES) analyses of experimental data. (A) Spectra of Cu foil, Loligo (squid) melanin (modified from Rogers et al., 2019 ), and untreated and matured melanosomes from Xenopus laevis (frog) skin and liver. (B) Averaged spectra
Journal Article

Gigantism in tadpoles of the Neogene frog Palaeobatrachus Available to Purchase

Zbyněk Roček, Ronald Böttcher, Richard Wassersug
Journal: Paleobiology
Published: 01 December 2006
Paleobiology (2006) 32 (4): 666–675.
DOI: https://doi.org/10.1666/05073.1
...., tadpole at the beginning of metamorphosis in dorsal view. NMP Pb 1697. Late Oligocene, Bechlejovice, Czech Republic. D, Palaeobatrachus sp., tadpole at the beginning of metamorphosis in dorsal view. NMP Pb 1696. Late Oligocene, Bechlejovice, Czech Republic. E1, Head of a tadpole of Xenopus laevis , NF...
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Journal Article

FIRST OCCURRENCE OF XENOPUS (ANURA: PIPIDAE) ON THE ARABIAN PENINSULA: A NEW SPECIES FROM THE UPPER OLIGOCENE OF YEMEN Available to Purchase

AMY C. HENRICI, ANA MARIA BÁEZ
Published: 01 July 2001
Journal of Paleontology (2001) 75 (4): 870–882.
DOI: https://doi.org/10.1666/0022-3360(2001)075<0870:FOOXAP>2.0.CO;2
..., and they are not widely available in museum and university collections, which makes their study difficult. One species of Xenopus, X. laevis, is widely used for laboratory studies all over the world, and although large amounts of data have been accumulated on it ( Cannatella and de Sá, 1993 ), little is known about...
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View PDF for article title, FIRST OCCURRENCE OF <span class="search-highlight">XENOPUS</span> (ANURA: PIPIDAE) ON THE ARABIAN PENINSULA: A NEW SPECIES FROM THE UPPER OLIGOCENE OF YEMEN
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Journal Article

The morphology of the terminal phalanges in Permo-Carboniferous synapsids: an evolutionary perspective Available to Purchase

Hillary C. Maddin, Robert R. Reisz
Published: 14 April 2007
Canadian Journal of Earth Sciences (2007) 44 (2): 267–274.
DOI: https://doi.org/10.1139/e06-076
..., as in the case of Xenopus laevis , the African clawed frog, and several salamander species ( Noble 1931 ). These structures are poorly understood in lissamphibians and may not be phylogenetically homologous with the amniote condition, as indicated by differences in tissue composition and growth. 2 2 H.C...
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View PDF for article title, The morphology of the terminal phalanges in Permo-Carboniferous synapsids: an evolutionary perspective
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Journal Article

Staining algorithm for seismic modeling and migration Available to Purchase

Bo Chen, Xiaofeng Jia
Journal: Geophysics
Published: 16 May 2014
Geophysics (2014) 79 (4): S121–S129.
DOI: https://doi.org/10.1190/geo2013-0262.1
... aperture correction in prestack depth migration using beamlet decomposition : Geophysics , 74 , no.  4 , S67–S74 , doi: 10.1190/1.3116284 . GPYSA7 0016-8033 Dale L. Slack J. M. W. , 1987 , Fate map for the 32-cell stage of Xenopus laevis : Development , 99 , 527–551 . DEVPED 0950...
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Journal Article

Generalized staining algorithm for seismic modeling and migration Available to Purchase

Qihua Li, Xiaofeng Jia
Journal: Geophysics
Published: 22 November 2016
Geophysics (2017) 82 (1): T17–T26.
DOI: https://doi.org/10.1190/geo2015-0652.1
...-0262.1 . GPYSA7 0016-8033 Claerbout , J. F. , 1971 , Toward a unified theory of reflector mapping : Geophysics , 36 , 467 – 481 , doi: 10.1190/1.1440185 . GPYSA7 0016-8033 Dale , L. , and J. M. W. Slack , 1987 , Fate map for the 32-cell stage of Xenopus laevis...
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Journal Article

Highlighting the capability of zeolites for agro-chemicals contaminants removal from aqueous matrix: Evidence of 2-ethyl-6-methylaniline adsorption on ZSM-12 Available to Purchase

Elisa Rodeghero, Luisa Pasti, Giuseppe Nunziante, Tatiana Chenet, Lara Gigli, Jasper R. Plaisier, Annalisa Martucci
Published: 01 March 2019
American Mineralogist (2019) 104 (3): 317–324.
DOI: https://doi.org/10.2138/am-2019-6754
... , Applied Clay Science , 18 ( 5 ), 265 – 275 . Osano , O. , Admiraal , W. , and Otieno , D. ( 2002a ) Developmental disorders in embryos of the frog Xenopus laevis induced by chloroacetanilide herbicides and their degradation products . Environmental Toxicology and Chemistry , 21...
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View PDF for article title, Highlighting the capability of zeolites for agro-chemicals contaminants removal from aqueous matrix: Evidence of 2-ethyl-6-methylaniline adsorption on ZSM-12
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Journal Article

SOFT-TISSUE PRESERVATION IN MIOCENE FROGS FROM LIBROS, SPAIN: INSIGHTS INTO THE GENESIS OF DECAY MICROENVIRONMENTS Available to Purchase

MARIA E. MCNAMARA, PATRICK J. ORR, STUART L. KEARNS, LUIS ALCALÁ, PERE ANADÓN, ENRIQUE PEÑALVER MOLLÁ
Journal: PALAIOS
Published: 01 February 2009
PALAIOS (2009) 24 (2): 104–117.
DOI: https://doi.org/10.2110/palo.2008.p08-017r
... tigerina skin collagen: Comparative Biochemistry and Physiology B : Biochemistry and Molecular Biology , 128 . 81 – 90 . Sato , N.L. , and Inoue , S. , 1967 , Regeneration of the neural lobe in the adult frog, Xenopus laevis Daudin : Gunma Journal of Medical Science , 16 . 100...
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View PDF for article title, SOFT-TISSUE PRESERVATION IN MIOCENE FROGS FROM LIBROS, SPAIN: INSIGHTS INTO THE GENESIS OF DECAY MICROENVIRONMENTS
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Book Chapter

A history of digit identification in the manus of theropods (including Aves) Available to Purchase

Author(s)
Kasper Lykke Hansen
Book: Dinosaurs and Other Extinct Saurians: A Historical Perspective
Series: Geological Society, London, Special Publications
Publisher: The Geological Society of London
Published: 01 January 2010
DOI: 10.1144/SP343.16
EISBN: 9781862395916
...’ regarding the ontogeny of the vertebrate limb were proposed and described ( Shubin & Alberch 1986 ). The preliminary investigation utilized Danio rerio (the zebra fish) and amphibians Ambystoma mexicanum (an urodel) and Xenopus laevis (an anuran) as model organisms. Later on, amniotes were also...
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Abstract
View PDF for content titled, A history of digit identification in the manus of theropods (including Aves)
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Abstract The identification of avian and dinosaurian digits remains one of the major controversies in vertebrate evolution. A long history of morphological interpretations of fossil forms and studies of limb development in embryos has been given as evidence for two differing points of view. From an originally pentadactyl forelimb, either digits I, II and III form in the manus of birds and thus support a dinosaurian ancestry, or digits II, III and IV form in the manus supporting a more ancient ancestry or an evolutionary frame shift. A review of the history of research into the subject is presented here, dating from approximately 1825 to 2009.