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Megasphaera ornata

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Journal Article
Journal: Geology
Published: 01 February 2007
Geology (2007) 35 (2): 115–118.
... in a sculptured envelope that is very similar to that of Doushantuo animal eggs and blastula embryos such as Megasphaera ornata . A hallmark of these fossils is a three-dimensional spiral structure, which always consists of three clockwise coils, and occurs on both the envelope and the internal body. The spiral...
FIGURES
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SEM of   <b>Megasphaera</b> <b>ornata</b>  , showing tubercular ornamentation ( 1 ), tran...
Published: 01 January 2014
Figure 22 SEM of Megasphaera ornata , showing tubercular ornamentation ( 1 ), transitional form between tubercular and cerebral ornamentation ( 2 ), cerebral ornamentation ( 3 ), transitional form between tubercular, cerebral, and polygonal ornamentation ( 4, 5 ), polygonal ornamentation ( 6
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Figure 1. Scanning electron micrograph (SEM) images of  <b>Megasphaera</b> <b>ornata</b> ...
in > Geology
Published: 01 February 2007
Figure 1. Scanning electron micrograph (SEM) images of Megasphaera ornata (A) and helical spheroidal fossils (B–S). A: Cerebral sculpture on Megasphaera ornata . B–D: Helical spheroidal fossils with cerebral sculpture and subtle spiral structures (arrows) on envelopes, expressed as shallow
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Figure  4 — <b>Megasphaera</b> <b>ornata</b>  n. sp.  1 – 2,  polygonal envelope ornament...
Published: 01 September 2000
Figure 4 — Megasphaera ornata n. sp. 1 – 2, polygonal envelope ornamentation. Note the secondary spherulitic overgrowth (arrowed) on internal body; 3 – 4, polygons with fractal branching; 5 – 6, tubercular envelope ornamentation; 7 – 10, tubercles with dimples at top (arrows in 10
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Figure  5 — <b>Megasphaera</b> <b>ornata</b>  n. sp. ( 1–4 ) and  Parapandorina 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
Journal Article
Published: 01 September 2000
Journal of Paleontology (2000) 74 (5): 767–788.
...Figure 4 — Megasphaera ornata n. sp. 1 – 2, polygonal envelope ornamentation. Note the secondary spherulitic overgrowth (arrowed) on internal body; 3 – 4, polygons with fractal branching; 5 – 6, tubercular envelope ornamentation; 7 – 10, tubercles with dimples at top (arrows in 10...
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Journal Article
Published: 01 January 2014
Journal of Paleontology (2014) 88 (1): 1–67.
...Figure 22 SEM of Megasphaera ornata , showing tubercular ornamentation ( 1 ), transitional form between tubercular and cerebral ornamentation ( 2 ), cerebral ornamentation ( 3 ), transitional form between tubercular, cerebral, and polygonal ornamentation ( 4, 5 ), polygonal ornamentation ( 6...
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Figure  3 — <b>Megasphaera</b> inornata  ( 1–2, 4–5, 7, 11 ) and  <b>Megasphaera</b> orna...
Published: 01 September 2000
Figure 3 — Megasphaera inornata ( 1–2, 4–5, 7, 11 ) and Megasphaera ornata n. sp. ( 12 – 13 ). 1–2, 4–5, 7, 11, Megasphaera inornata Chen and Liu, 1986 . (For all fossil figures in this paper, a field number and a photo number are given for each SEM photograph; and a field number, a thin
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Figure  12 —A resting egg of the extant branchiopod  Eubranchipus vernalis....
Published: 01 September 2000
Figure 12 —A resting egg of the extant branchiopod Eubranchipus vernalis. Compare its ornamentation with that of Megasphaera ornata n. sp. 1. Entire specimen; 2. close up of envelope ornamentation. The scale bar in 1 represents 100 μm for 1 ; 25 μm for 2. Photos courtesy of Dr. Denton
Journal Article
Published: 01 January 2014
Journal of Paleontology (2014) 88 (1): 92–98.
.... In some specimens, the row of holes and rims is replaced by a narrow groove flanked on either side by the rim ( Fig. 1 .2). These spheres are similar in size and external ornamentation to the far more common Megasphaera ornata Xiao and Knoll, 2000 which, however, lacks the helical row of holes...
FIGURES
Journal Article
Published: 03 May 2017
Journal of the Geological Society (2017) 174 (5): 793–802.
... probably represent one taxon dividing from a single cell to thousands of cells ( Fig. 2a–f ). This taxon has been named either Tianzhushania or Megasphaera according to different taxonomic interpretations ( Yin et al. 2004 ; Xiao et al. 2014 b ). Tianzhushania is preferred here (see Box  3...
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Journal Article
Journal: Palynology
Published: 01 March 2016
Palynology (2016) 40 (1): 83–121.
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