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Chuaria circularis

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Journal Article
Published: 01 May 1990
Journal of Paleontology (1990) 64 (3): 488.
Series: GSA Microform Publication
Published: 01 January 1990
DOI: 10.1130/micro20-p168
EISBN: 9780813759203
... Abstract This is the first supplement to the Annotated Bibliography of the World Literature on the Grand Canyon Type Fossil Chuaria circularis Walcott, 1899. The reader is referred to extensive introductory material that appeared in Vol. 3 of the Grand Canyon bibliography (Spamer, 1988, Geol...
Series: GSA Microform Publication
Published: 01 January 1983
DOI: 10.1130/micro17-p94
EISBN: 9780813759173
... Abstract This annotated bibliography is a guide to the literature on Chuaria Walcott, 1899, currently understood to be a nmnospecific genus represented by C. circularis Walcott, to which a number of other taxa have been referred in taxonomic synonymy. Because of the taxonomic complications...
Series: GSA Microform Publication
Published: 01 January 1983
DOI: 10.1130/micro17-p4
EISBN: 9780813759173
... part, “An annotated Bibliography of the World Literature on the Grand canyon Type Fossil Chuaria circularis Walcott, 1899, an Index Fossil for the Late Proterozoic” This bibliography was prepared as a separate publication. However, it is apparent from reading the very recent literature (see...
Series: GSA Microform Publication
Published: 01 January 1983
DOI: 10.1130/micro17-p50
EISBN: 9780813759173
...-indexed to all three volumes. The opportunity is taken herein to also update entries for Chuaria circularis Walcott and for Melanocyrillium Bloeser, spp. The updated entry for C. circularis complements Part III of this volume, the annotated bibliography of the world literature on Chuaria. To maintain...
Journal Article
Published: 01 November 1973
Journal of Paleontology (1973) 47 (6): 1108-1112.
Journal Article
Published: 01 January 1979
Canadian Journal of Earth Sciences (1979) 16 (1): 150-166.
... the filaments Archaeotrichion , Taeniatum and Siphonophycus , and the sphaeromorph acritarchs Kildinella , Trachysphaeridium , Nucellosphaeridium , and Chuaria circularis . The megafossils, ail of probable algal affinities, comprise large carbonaceous ribbons assigned to the new vendotaenid species Tawuia...
Journal Article
Journal: Geology
Published: 01 January 2017
Geology (2017) 45 (1): 75-78.
... are difficult to resolve because Chuaria fossils are morphologically simple, apparently lack cellular preservation, and do not record a complete life cycle. Under RLM, Chuaria specimens from the Liulaobei Formation conform to the diagnosis of Chuaria circularis ( Walcott, 1899 ). They are spherical...
Journal Article
Journal: Geology
Published: 01 July 2011
Geology (2011) 39 (7): 643-646.
... information, is available online at www.geosociety.org/pubs/ft2011.htm , or on request from editing@geosociety.org or Documents Secretary, GSA, P.O. Box 9140, Boulder, CO 80301, USA. Chuaria , as represented by its type species C. circularis , is an acritarch characterized by a smooth vesicle...
FIGURES
Series: Geological Society, London, Special Publications
Published: 01 January 2007
DOI: 10.1144/SP286.35
EISBN: 9781862395343
...-bedded shales. S2 : Lower Shale Member (or Chopoghloo Member ): 151.7 m thick. Black shale containing fossils including Chuaria circularis, Tawuia fusiformis, Vendotaenia sp., Phyllophycos radiatoidalis . This unit contains phosphatic pellets. S3 : Middle Dolomite Member : 87.3 m thick...
Image
Acritarchs of the Cango Caves Group. Location of samples: see Figure 2 . ( ...
Published: 01 June 2006
faveolata , Kombuis Member, sample GGO 27 A (specimen 7). Note translucent microspheres near the edge of the vesicle. ( d ) Leiosphaeridia tenuissima , Nooitgedagt Member, sample GGO 24 C (specimen 12). The same specimen could be classified under Chuaria circularis Walcott, depending on the lower size
Image
Figure  14 — 1–5,  Ostiumsphaeridium complitum  n. sp.;  1,  holotype, 66-6...
Published: 01 March 2009
Figure 14 — 1–5, Ostiumsphaeridium complitum n. sp.; 1, holotype, 66-6 (2601, 5), p. 3, 14700-534; 2, 62N2-51 (2605, 5), p. 1, 14700-216; 3, 62N2-50 (2605, 5), p. 7, 14700-212; 4, paratype 68-2 (2648, 5), p. 2, 14700-554; 5, 69V-20 (2647, 5), p. 2, 14700-712; 6, Chuaria circularis
Image
Acritarchs of the Gamtoos Group and Sardinia Bay Formation. Location of sam...
Published: 01 June 2006
Figure 8. Acritarchs of the Gamtoos Group and Sardinia Bay Formation. Location of samples: see Figure 4 . ( a ) Chuaria circularis , sample GGG 39C (specimen 1), Klein Rivier Formation. ( b ) Leiosphaeridia tenuissima , sample GGG 102 (specimen 1), Klein Rivier Formation. ( c ) Leiosphaeridia
Series: Geological Society, London, Special Publications
Published: 01 January 2009
DOI: 10.1144/SP326.14
EISBN: 9781862395749
... anquiensis ( Yin 1991 ) and L. tenuissima ( Eisenack 1958 ) belong to the genus Leiosphaeridia . Other species include Leptoteichos golubici sp.; Navifusa majensis ( Pyatiletov 1980 ); Chuaria circularis ( Walcott 1899 ); Tappania tubata ( Yin 1997 ); Kildinella sp. ( Timofeev 1966...
FIGURES | View All (7)
Journal Article
Published: 01 June 2006
South African Journal of Geology (2006) 109 (1-2): 193-214.
... faveolata , Kombuis Member, sample GGO 27 A (specimen 7). Note translucent microspheres near the edge of the vesicle. ( d ) Leiosphaeridia tenuissima , Nooitgedagt Member, sample GGO 24 C (specimen 12). The same specimen could be classified under Chuaria circularis Walcott, depending on the lower size...
FIGURES | View All (12)
Journal Article
Journal: Geology
Published: 01 December 2001
Geology (2001) 29 (12): 1119-1122.
... at Miaohe, Hubei Province, China. The rather large imprints (∼8–42 mm) consist of a very delicate organic film with marginal compressional folds of the spherical body. Because of similar morphology, size, and co-occurrence with Chuaria circularis Walcott, Beltanelliformis was treated within...
FIGURES | View All (8)
Journal Article
Journal: Geology
Published: 01 June 2015
Geology (2015) 43 (6): 507-510.
... . Steiner M. , 1997 , Chuaria circularis Walcott 1899—“Megasphaeromorph acritarch” or prokaryotic colony? : Acta Universitatis Carolinae Geologica , v. 40 , p. 645 – 665 . Takeuchi N. , 2013 , Seasonal and altitudinal variations in snow algal communities on an Alaskan glacier (Gulkana...
FIGURES
Series: Geological Society, London, Special Publications
Published: 01 January 2007
DOI: 10.1144/SP286.22
EISBN: 9781862395343
... . Associated with the newly-collected form is Chuaria circularis and additional Tawuia possessing circular structures at the terminal end, as well as Beltina ( Maithy & Babu 1996 ). Similar forms are now well known from Meso-Neoproterozoic sequences of India. These forms are now considered...
FIGURES | View All (14)
Series: Geological Society, London, Special Publications
Published: 01 January 2012
DOI: 10.1144/SP366.9
EISBN: 9781862396142
... (1997 , 2003 ) have described a good assemblage of carbonaceous megafossils from the upper part of the Bhander Limestone. They have described Chuaria circularis , C. dulniensis , Tawuia dalensis , Chambalia minor and Bhanderia maiharensis , together with some unnamed forms. Kumar (1999) has...
FIGURES
Journal Article
Published: 01 March 2009
Journal of Paleontology (2009) 83 (2): 161-196.
...Figure 14 — 1–5, Ostiumsphaeridium complitum n. sp.; 1, holotype, 66-6 (2601, 5), p. 3, 14700-534; 2, 62N2-51 (2605, 5), p. 1, 14700-216; 3, 62N2-50 (2605, 5), p. 7, 14700-212; 4, paratype 68-2 (2648, 5), p. 2, 14700-554; 5, 69V-20 (2647, 5), p. 2, 14700-712; 6, Chuaria circularis...
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