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Charnia

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Journal Article
Published: 01 March 2024
Journal of Paleontology (2024) 98 (2): 232–248.
... macrofossil assemblages. In addition to the numerically dominant taxa—the non-biomineralizing tubular fossil Wutubus and discoidal fossils Aspidella and Hiemalora , the Shibantan biota also bears a moderate diversity of frondose fossils, including Pteridinium , Rangea , Arborea , and Charnia . In this paper...
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Journal Article
Published: 01 January 2007
Journal of the Geological Society (2007) 164 (1): 49–51.
.... We show that Charnia cannot be related to the modern cnidarian group the sea pens (Pennatulacea) with which it has for so long been compared, as generative zones cannot be homologized between these forms. 10 10 2006 6 6 2006 © 2007 The Geological Society of London 2007...
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Series: Geological Society, London, Special Publications
Published: 01 January 2007
DOI: 10.1144/SP286.17
EISBN: 9781862395343
... Abstract The Ediacaran frond Charnia , known mainly from fragmentary leaf-like fronds from around the world, is represented by completely preserved specimens with holdfasts in the Mistaken Point biota of Newfoundland. Previous reconstructions of Charnia from two-dimensional impressions were...
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The characters of valid Charnia species. (a) Charnia masoni holotype from Charnwood, UK showing sigmoidal branches and arcs of secondary-order branches. (b) Charnia gracilis from Inner Meadow, Newfoundland, Canada with long narrow primary-order branches. (c) Charnia ewinoni from Matthews Surface, Newfoundland, Canada with long stem. (d) Charnia masoni showing a purported disc (white arrow). Most specimens do not have discs. Scale bars (a, b) 2 cm; (c, d) 1 cm.
Published: 20 March 2025
Fig. 1. The characters of valid Charnia species. ( a ) Charnia masoni holotype from Charnwood, UK showing sigmoidal branches and arcs of secondary-order branches. ( b ) Charnia gracilis from Inner Meadow, Newfoundland, Canada with long narrow primary-order branches. ( c ) Charnia ewinoni
Journal Article
Published: 20 March 2025
Journal of the Geological Society (2025) 182 (3): jgs2024-242.
...Fig. 1. The characters of valid Charnia species. ( a ) Charnia masoni holotype from Charnwood, UK showing sigmoidal branches and arcs of secondary-order branches. ( b ) Charnia gracilis from Inner Meadow, Newfoundland, Canada with long narrow primary-order branches. ( c ) Charnia ewinoni...
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Detailed Charnia taphonomy. (a) Four orders of rotated and furled branching of Charnia sp. from the Matthews Surface, Catalina Dome, NL (1° brown; 2° green; 3° grey; 4° orange), with the caveat that not all 3° and 4° branches look the same. (b) Charnia sp. from the MUN Surface, Catalina Dome, NL with broken basal region (left), a central axis in strong positive relief and secondary-order branches with negative relief preservation of the tertiary-order branches consistent with the surface preserved being the inner surface of the upper primary-order branches (compare Fig. 5b). Scale bars 1 cm.
Published: 20 March 2025
Fig. 6. Detailed Charnia taphonomy. ( a ) Four orders of rotated and furled branching of Charnia sp. from the Matthews Surface, Catalina Dome, NL (1° brown; 2° green; 3° grey; 4° orange), with the caveat that not all 3° and 4° branches look the same. ( b ) Charnia sp. from the MUN Surface
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A diagram showing two possible ways in which Bradgatia linfordensis (left, middle box) and Charnia masoni (right, middle box) may been interrelated. The top box shows how Charnia may have evolved as an evolutionary simplification from part of the Bradgatia organism. In this view Bradgatia could be seen as a colony of Charnia-like fronds. The bottom box show a second, and more favoured hypothesis, that the whole of Bradgatia is homologous to Charnia, with simplifications and rotations taking place in the first-order branches, which are likewise homologues.
Published: 01 March 2009
Fig. 19. A diagram showing two possible ways in which Bradgatia linfordensis (left, middle box) and Charnia masoni (right, middle box) may been interrelated. The top box shows how Charnia may have evolved as an evolutionary simplification from part of the Bradgatia organism. In this view
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Rangeomorph branching and branch orientations. (a) Conceptual diagram of the branching in Charnia; all branches are furled in on themselves and rotated so the axis is not seen on the bedding plane. Lower branch is primary branch only, middle shows secondary-order branches forming the wall of the primary, and the upper branch shows tertiary-order branching but just as surface texture. Branch geometries not intended to be realistic. (b) Branching in a specimen of Rangea scheiderhohni showing primary-order branches that are biserial on the right (orange) (i.e. displayed and uniserial Charnia-like branches on the left (purple) caused by taphonomic processes of frond collapse onto a bedding plane). (c) Three-dimensional representation of (i) rotated and furled branching (like all Charnia branches), (ii) furled branches (compare some Fractofusus misrai branches) and (iii) displayed–unfurled branch used to create (i) and (ii).
Published: 20 March 2025
Fig. 2. Rangeomorph branching and branch orientations. ( a ) Conceptual diagram of the branching in Charnia ; all branches are furled in on themselves and rotated so the axis is not seen on the bedding plane. Lower branch is primary branch only, middle shows secondary-order branches forming
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Figure 7. Comparison of the architecture of hapsidophyllid leaflets (1, 2 Hapsidophyllas flexibilis; 3, 4 Frondophyllas grandis) and; 5, 6 a complete Charnia masoni petalodium. Small box-shaped divisions in each taxon are formed by secondary branches, which are combined as modules to make up elongate primary branches. These in turn combine to make up each individual hapsidophyllid leaflet (1–4) or the entire leaf of Charnia (6). Thick black bars in the hapsidophyllid leaflets (2, 4) represent open tubes, which are either absent or internal in Charnia (6).
Published: 01 November 2009
Figure 7. Comparison of the architecture of hapsidophyllid leaflets ( 1 , 2 Hapsidophyllas flexibilis ; 3 , 4 Frondophyllas grandis ) and; 5 , 6 a complete Charnia masoni petalodium. Small box-shaped divisions in each taxon are formed by secondary branches, which are combined as modules
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 Figure14—Outcrop view of Charnia grandis? (NFM F-494), in association with another possible Charnia specimen at middle left of view (NFM F-495). Bar scale divisions in decimeters
Published: 01 January 2008
Figure 14 —Outcrop view of Charnia grandis ? (NFM F-494), in association with another possible Charnia specimen at middle left of view (NFM F-495). Bar scale divisions in decimeters
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Possible mode of life of Charnia masoni. (a) Lateral view of an isolated primary-order branch showing only one surface in contact with the sediment. (b) Transverse cross-section of the branch in (a) showing the very high surface area in contact with the seawater. (c) Hypothetical reconstruction of the tip of a third-order Charnia branch, depicted as being covered with collar cells (choanocytes) for feeding and pumping of seawater. Inner surface only. (d) Artist's reconstruction of C. masoni in inferred life position on the seafloor surrounded by matground.
Published: 20 March 2025
Fig. 5. Possible mode of life of Charnia masoni . ( a ) Lateral view of an isolated primary-order branch showing only one surface in contact with the sediment. ( b ) Transverse cross-section of the branch in ( a ) showing the very high surface area in contact with the seawater. ( c
Journal Article
Published: 01 July 2009
Journal of Paleontology (2009) 83 (4): 503–523.
... used as modules in construction of larger structures. Four taxa of rangeomorph fronds are present – Avalofractus abaculus n. gen. et sp., Beothukis mistakensis Brasier and Antcliffe, Trepassia wardae (Narbonne and Gehling), and Charnia cf. C. masoni Ford. All of these taxa exhibit an alternate array...
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Journal Article
Published: 01 March 2009
Journal of the Geological Society (2009) 166 (2): 363–384.
...Fig. 19. A diagram showing two possible ways in which Bradgatia linfordensis (left, middle box) and Charnia masoni (right, middle box) may been interrelated. The top box shows how Charnia may have evolved as an evolutionary simplification from part of the Bradgatia organism. In this view...
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Journal Article
Published: 01 January 2008
Journal of Paleontology (2008) 82 (1): 1–36.
...Figure 14 —Outcrop view of Charnia grandis ? (NFM F-494), in association with another possible Charnia specimen at middle left of view (NFM F-495). Bar scale divisions in decimeters ...
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Journal Article
Journal: Geology
Published: 01 January 2003
Geology (2003) 31 (1): 27–30.
...Guy M. Narbonne; James G. Gehling Abstract Newly discovered fronds of the Ediacaran index fossil Charnia from the Drook Formation of southeastern Newfoundland are the oldest large, architecturally complex fossils known anywhere. Two species are present: Charnia masoni , originally described from...
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Primary- and secondary-order branching in Charnia masoni. (a) Lower surface of C. masoni with branching based on the holotype. (b) Single primary-order branch (brown) showing its peapod-like shape composed of two vanes of secondary-order branches (one coloured purple is extracted in (d)): (i) lower surface of primary; (ii) internal view of primary showing central lumen between the two curved vanes; (iii) view showing the straight axis, with glide plane symmetry. (c) Oblique view of the upper surface of C. masoni holotype angled towards the tip showing hypothetical gaping between pairs of branches at the primary and secondary orders. (d) Three views of a pair of secondary-order branches showing the curved axis (pink): (i) axial view; (ii) oblique view; (iii) view showing lumina of secondary-order branches.
Published: 20 March 2025
Fig. 3. Primary- and secondary-order branching in Charnia masoni . ( a ) Lower surface of C. masoni with branching based on the holotype. ( b ) Single primary-order branch (brown) showing its peapod-like shape composed of two vanes of secondary-order branches (one coloured purple is extracted
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Primary-order branch of Charnia masoni reconstructed with secondary- and tertiary-order branches. (a) Primary-order branch with a single secondary-order branch highlighted in orange. (b) A pair of opposing secondary-order branch of C. masoni in three orientations (i–iii) with the outermost vanes of the secondary-order branches coloured orange; the inner vanes are white. Two pairs of opposing tertiary-order branches are coloured dark purple on the outside and light purple on the inside. (c) Two pairs of tertiary-order branches of C. masoni in three orientations corresponding to those in (bi–iii) (all other branches deleted). It should be noted that the shapes, curvature and orientations of the tertiary-order branch pairs (dark v. light blue) are different from one another. If the inner and outer surfaces of (c1–iii) were covered in (for example) collar cells there would be 16 surfaces available for feeding.
Published: 20 March 2025
Fig. 4. Primary-order branch of Charnia masoni reconstructed with secondary- and tertiary-order branches. ( a ) Primary-order branch with a single secondary-order branch highlighted in orange. ( b ) A pair of opposing secondary-order branch of C. masoni in three orientations (i–iii
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Figure 8. Diorama illustrating idealized progression of communities during ecological succession. A, Charnia Type B. B, Pectinate. C, Charnia Type A. D, Spindle. E, Bradgatia. F, Duster. G, Charniodiscus. H, Triangle. I, Ostrich feather. J, Xmas tree
Published: 01 January 2003
Figure 8. Diorama illustrating idealized progression of communities during ecological succession. A, Charnia Type B. B, Pectinate. C, Charnia Type A. D, Spindle. E, Bradgatia . F, Duster. G, Charniodiscus . H, Triangle. I, Ostrich feather. J, Xmas tree
Journal Article
Journal: Geology
Published: 14 June 2021
Geology (2021) 49 (10): 1160–1164.
... is dominated by the non-biomineralized tubular taxon Shaanxilithes , which has the potential to be a terminal Ediacaran index fossil, and by the iconic frondose rangeomorph Charnia , which represents the only unambiguous Ediacara-type fossil discovered in northwestern China. The co-occurrence of Charnia...
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Journal Article
Published: 01 July 2012
Journal of the Geological Society (2012) 169 (4): 395–403.
... the juvenile growth stages of Ediacaran organisms including Charnia spp. and Trepassia spp. This is the first report of an assemblage wholly dominated by such small juvenile rangeomorph forms, and provides insights into the ontogeny and ecology of these earliest members of the Ediacara biota. The fronds occur...
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