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Parapandorina

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Journal Article
Published: 01 September 2000
Journal of Paleontology (2000) 74 (5): 767–788.
... to the genera Megasphaera and Parapandorina were originally interpreted as problematica and volvocacean green algae, respectively, but newly discovered populations support their reinterpretation as the eggs and embryos of early animals. The fossils' large size (about half a millimeter in diameter), persistent...
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Figure  8 — <b>Parapandorina</b> raphospissa. 1 – 6,  Eight-cell stage;  7 – 12,  ...
Published: 01 September 2000
Figure 8 — Parapandorina raphospissa. 1 – 6, Eight-cell stage; 7 – 12, later stages. 1 – 3, Different views of the same specimen, α, β, γ, δ, ε, ξ, η, 𝛉 identify the eight internal bodies. SRA-1, 410, 411, 412; 4, SRA-1, 258; 5, WJY-19E, 298; 6, SRA-1, 261; 7, SRA-1, 259; 8, K94-21
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Figure  6 —Descriptive terminology for  <b>Parapandorina</b> raphospissa  used in ...
Published: 01 September 2000
Figure 6 —Descriptive terminology for Parapandorina raphospissa used in this paper
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Figure  5 — Megasphaera ornata  n. sp. ( 1–4 ) and  <b>Parapandorina</b> raphospis...
Published: 01 September 2000
Figure 5 — Megasphaera ornata n. sp. ( 1–4 ) and Parapandorina raphospissa ( 5–11 ). 1, K94-21, 248; 2, WJY-19E, 220; 3, WJY-19E, 284; 4, holotype (HUHPC-62990). Note the smooth internal body. SRA-1, 38; 5 – 7, two-cell stage; 8 – 11, possible two-cell stage. 5, Note the smooth
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Figure  9 — <b>Parapandorina</b> raphospissa  ( 1 – 6 ) and  Megaclonophycus onust...
Published: 01 September 2000
Figure 9 — Parapandorina raphospissa ( 1 – 6 ) and Megaclonophycus onustus ( 7 – 12 ). 1, Note the diagenetic apatite crystal (arrow). SRA-1, 370; 2, SRA-1, 377; 3, SRA-1, 356; 4, SRA-1, 342; 5, SRA-1, 264; 6, photomicrograph. SRA-1, SRA-1-5, 20.4X109.4, 48–12. 7 – 12
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Figure  7 — <b>Parapandorina</b> raphospissa.  Two-cell stage ( 1 ) and four-cell ...
Published: 01 September 2000
Figure 7 — Parapandorina raphospissa. Two-cell stage ( 1 ) and four-cell stage ( 2 – 12 ). Note the spherulitic covering on internal bodies in 1, 3, 7. 1, The space between shrunken internal bodies and envelope is filled with dolomite (arrow). SRA-1, 363; 2, SRA-1, 355; 3, WJY-19E, 305; 4
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Figure  10 —Globule size (shaded bars) and internal body size (open bars) i...
Published: 01 September 2000
Figure 10 —Globule size (shaded bars) and internal body size (open bars) in Megasphaera spp., Parapandorina raphospissa, and Megaclonophycus onustus. This graph shows the constancy of globule size and the decreasing internal body size with increasing number of internal bodies (from left
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SEM of   Megasphaera ornata  , showing tubercular ornamentation ( 1 ), tran...
Published: 01 January 2014
), dimpled ornamentation ( 7 ), Parapandorina -stage ( 8–10 ), and Megaclonophycus -stage ( 11, 12 ). 1 , HUHPC (WJY98-18E, 1064, stage 54-B4); 2 , IGCAGS-051226-6119; 3 , HUHPC (WJY98-18E, 1071, stage 54-C2); 4 , IGCAGS-081317-16; 5 , IGCAGS-090617-33; 6 , IGCAGS-050719-G38; 7 , IGCAGS-090617-32
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Figure 1. Scanning electron micrographs of lobster eggs (A–D) and Neoproter...
in > Geology
Published: 01 January 2003
and filaments of mineralized bacteria. E: Surface of fossil egg envelope ( Megasphaera sp.) exhibiting preservation in fine-grained apatite. F: Cross section of fossilized egg envelope ( Parapandorina raphospissa ) showing coating growing both inward (I) and outward (O). G: Cross section of fossilized egg
Journal Article
Published: 03 May 2017
Journal of the Geological Society (2017) 174 (5): 793–802.
... ; Cunningham et al. 2012 a ; L. Chen et al. 2014 ; Xiao et al. 2014 a , b ). The names Megasphaera (single-celled specimens), Parapandorina (multiple polyhedral cells) and Megaclonophycus (large numbers of usually spheroidal cells) are now widely considered to be synonyms (e.g. Huldtgren et...
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Journal Article
Journal: Geology
Published: 01 January 2003
Geology (2003) 31 (1): 39–42.
... and filaments of mineralized bacteria. E: Surface of fossil egg envelope ( Megasphaera sp.) exhibiting preservation in fine-grained apatite. F: Cross section of fossilized egg envelope ( Parapandorina raphospissa ) showing coating growing both inward (I) and outward (O). G: Cross section of fossilized egg...
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Journal Article
Published: 01 March 2014
Journal of Paleontology (2014) 88 (2): 385–394.
... with varying levels of taphonomic fidelity. This interpretation is critically dependent on the comparison of the polygonal surface with a blastula surface. In surficial morphology, the polygonal pattern is similar to that of putative blastulas ( Parapandorina -stage) from the Doushantuo Formation ( Xiao...
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Journal Article
Published: 01 January 2014
Journal of Paleontology (2014) 88 (1): 1–67.
... ), dimpled ornamentation ( 7 ), Parapandorina -stage ( 8–10 ), and Megaclonophycus -stage ( 11, 12 ). 1 , HUHPC (WJY98-18E, 1064, stage 54-B4); 2 , IGCAGS-051226-6119; 3 , HUHPC (WJY98-18E, 1071, stage 54-C2); 4 , IGCAGS-081317-16; 5 , IGCAGS-090617-33; 6 , IGCAGS-050719-G38; 7 , IGCAGS-090617-32...
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Journal Article
Published: 01 January 2014
Journal of Paleontology (2014) 88 (1): 92–98.
... [English: p. 702], pl. 2, figs. 1a , 1b, 2. 2000 Spiralicellula ? bulbifera ?; Xiao and Knoll , p. 779, fig. 11.1–11.3, 11.5–11.8. 2004 Parapandorina raphospissa Xue et al . 1995 [ partim ]; Yin et al., fig. 7D [only]. 2007a helical spheroidal fossils, Xiao et al. , figs. 1 B–1S, 2A...
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Journal Article
Published: 01 March 2002
Journal of Paleontology (2002) 76 (2): 347–376.
... and is not known to preserve a comparable degree of three-dimensionality. Phosphatized Parapandorina from Doushantuo phosphorites at Weng'an, interpreted first by Xue et al. (1995) as volvocacean green algae and later by Xiao et al. (1998b ; Xiao and Knoll, 2000) as animal embryos, do contain multiple...
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Journal Article
Journal: Palynology
Published: 01 March 2016
Palynology (2016) 40 (1): 83–121.
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Journal Article
Published: 01 May 2010
Journal of Paleontology (2010) 84 (3): 363–401.
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