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Achomosphaera

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Journal Article
Journal: Palynology
Published: 20 December 2018
Palynology (2018) 42 (0): 10-44.
... discussions held during two subsequent workshops in Montreal (Canada) on 16 April 2014 and Ostend (Belgium) on 8 July 2015. Five species of the genus Achomosphaera Evitt 1963 and 33 of the genus Spiniferites Mantell 1850 emend. Sarjeant 1970 occuring in Pliocene to modern sediments are listed and briefly...
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1–6.  <b>Achomosphaera</b> argesensis  Demetresçu  1989  from S4677 Hungary FI-200...
in > Palynology
Published: 20 December 2018
Plate 1. 1–6. Achomosphaera argesensis Demetresçu 1989 from S4677 Hungary FI-2007-001 at high to low focus; note hollow bases of processes (shown by bubbles present in 2–3), visible tabulation (3), thick wall (4) and high crest above archeopyle (5). Slide provided by VTT, photographed by KNM
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1–3. Holotype of  <b>Achomosphaera</b> callosa  Matsuoka  1983  at high to low foc...
in > Palynology
Published: 20 December 2018
Plate 2. 1–3. Holotype of Achomosphaera callosa Matsuoka 1983 at high to low focus. 4. Topotype. 5. Focus on holotype showing detail of wall texture and process. 6–8. Upper to lower focus of Achomosphaera sp. A of Matsuoka ( 1983 ), plate 11, figures 1–5 [Mao Shaozhi ( 1989 ) considered her
Journal Article
Journal: Palynology
Published: 03 April 2018
Palynology (2018) 42 (2): 180-198.
... of these assemblages has allowed the opportunity to formally describe some dinoflagellate cysts previously left in open nomenclature and others recognised for the first time in this well. We propose in this paper the formal description of 10 new species: Achomosphaera eggadania sp. nov., Achomosphaera progranulata sp...
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Journal Article
Journal: Palynology
Published: 20 December 2018
Palynology (2018) 42 (0): 203-220.
...Laurent Londeix Abstract A new quantitative biostratigraphical method, based on an ‘index of stratigraphical abundance’ (ISA), has been used to refine the stratigraphical range of 50 dinoflagellate cyst taxa. Most of these correspond to Quaternary representatives of Achomosphaera or Spiniferites...
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Series: AAPG Memoir
Published: 01 January 2009
DOI: 10.1306/13191092M903338
EISBN: 9781629810287
... microfossils indicating nannofossil biozones NN11, NN10, NN9, and the Globorotalia humerosa and Globorotalia acostaensis planktonic fora-miniferal biozones. Dinoflagellate cysts found in these sediments were Spiniferites mirabilis , Dapsilidinium pastielsii , Sumatradinium hispidum , and Achomosphaera...
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Journal Article
Journal: Palynology
Published: 01 January 2007
Palynology (2007) 31 (1): 53-62.
...HERNAN ANTOLINEZ-DELGADO; FRANCISCA E. OBOH-IKUENOBE Abstract Six new species of dinoflagellate cysts and one new combination from the Paleocene to ? lower most Eocene succession in the Alo-1 well, southeast Nigeria, are proposed herein. The new species are Achomosphaera quadrata , Diphyes bifidum...
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Journal Article
Journal: Palynology
Published: 01 January 2001
Palynology (2001) 25 (1): 217-249.
... reported in the literature. Spiniferites–Achomosphaera Group and peridinioid cysts dominate most of the dinoflagellate cyst assemblage in both sections. The peridinioid assemblage reported here is assigned to the tropical to subtropical Malloy suite of Lentin and Williams (1980) . The Río Loro section...
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Journal Article
Journal: Palynology
Published: 01 October 1995
Palynology (1995) 19 (1): 45-75.
...: Adnatospheridium multispinosum, Apectodinium homomorphum, Areosphaeridium dictyoplokus, Deflandrea phosphoritica, Spinidinium sagittula, Lingulodinium machaerophorum, Muratodinium fimbratum, Palaeocystodinium golzowense, and Hafniasphaera septata. Other taxa described include: Achomosphaera alcicornu...
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‘Index of stratigraphical abundance’ (ISA) of some stratigraphically long r...
in > Palynology
Published: 20 December 2018
Figure 1. ‘Index of stratigraphical abundance’ (ISA) of some stratigraphically long ranging Spiniferites and Achomosphaera species. The chronostratigraphicalframework (left column) is from ICS ( 2016 ). Species are presented in order of appearance. The scale bar corresponds to ISA =0.1.
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‘Index of stratigraphical abundance’ (ISA) of some stratigraphically short ...
in > Palynology
Published: 20 December 2018
Figure 2. ‘Index of stratigraphical abundance’ (ISA) of some stratigraphically short ranging Spiniferites and Achomosphaera species. The chronostratigraphicalframework (left column) is from ICS ( 2016 ). Species are presented in alphabeticalorder. The scale bar corresponds to ISA =0.1.
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Scanning electron micrographs of the four modern cyst-based genera mentione...
in > Palynology
Published: 20 December 2018
Plate 1. Scanning electron micrographs of the four modern cyst-based genera mentioned in the text: Spiniferites (1) , Achomosphaera (2), Nematosphaeropsis (3) and Impagidinium (4). 1. Spiniferites ramosus from modern surface sediment in Baie de Vilaine (Bretagne, France). 2
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Comparison chart of the dinoflagellate cyst zonation (Mps: Melitasphaeri d ...
Published: 01 July 2007
TEXT-FIGURE 4 Comparison chart of the dinoflagellate cyst zonation (Mps: Melitasphaeri d ium pseudorecurvatum ; Ssp: Schematophora speciosa ; Cfu: Cordosphaeridium funiculatum ; Aal: Achomosphaera alcicornu ; Gse: Glaphyrocysta semitecta ; Adi: Areosphaeridium diktyoplokus ; Rac
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Relative abundances of selected species and groups of morphologically relat...
in > Palynology
Published: 01 June 2010
at the Ouled Haddou section (northern Morocco). Glaphyrocysta group = Glaphyrocysta spp. + Riculacysta spp., Spiniferites group = Achomosphaera spp. + Spiniferites spp., Senegalinium group = Andalusiella dubia + the small Cerodinium mediterraneum + Geiselodinium psilatum + Lejeunecysta
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1–6:  Spiniferites membranaceus . 1–2. Dee Estuary, SEM-images. 3–6: Celtic...
in > Palynology
Published: 20 December 2018
Plate 8. 1–6: Spiniferites membranaceus . 1–2. Dee Estuary, SEM-images. 3–6: Celtic Sea St. 6 3100 cs 8–4, 3–4, high focus, 5 optical section, 6 low focus. 7–9: Spiniferites mirabilis . Celtic Sea St. 6 4100 cs 9–3. 7: high focus; 8: optical section; 9: low focus. 10–12: Achomosphaera
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Figures 1 and 2.  Galeacysta etrusca  Well A, Archive Number 19226, 145.7  ...
in > Palynology
Published: 01 June 2014
Plate 4 Figures 1 and 2. Galeacysta etrusca Well A, Archive Number 19226, 145.7 μ m. Figures 3 and 4. Galeacysta etrusca Well A, Archive Number 19226, 142.8 μ m. Figures 5 and 6. Achomosphaera andalousiensis Well B, Archive Number 17606, 85.7 μ m. Figures 7 and 8. Achomosphaera
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Dinoflagellate cysts from the Paleogene in northern Japan. Scale bar for Fi...
Published: 01 December 2004
PLATE 4 Dinoflagellate cysts from the Paleogene in northern Japan. Scale bar for Fig. 14=100μm; for Figs. 1, 6, 13=70μm; for Figs. 2, 3, 4, 5, 7, 8, 10=50μm; for Figs. 9, 11, 12=33μm. Figs. 6, 8, 11, 12 in phase contrast while the rest in interference contrast.
 1 Achomosphaera alcicornu
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All figures x500; depths in core indicated in meters (m).  1 Charlesdowniea...
in > Palynology
Published: 01 January 2000
PLATE 2 All figures x500; depths in core indicated in meters (m). 1 Charlesdowniea clathrata subsp. Angulosa (Châteauneuf & Gruas-Cavagnetto 1978) Lentin & Vozzhennikova 1989; 251.0 m.
 2 Apectodinium parvum (Alberti 1961) Lentin & Williams 1977; 342.0 m.
 3, 4 Achomosphaera
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All figures x 500 
 1  Deflandrea phosphoritica , sample OGTS 6, EF K40. 
 ...
in > Palynology
Published: 01 January 2001
3, EF U53/4. 
 6 Pentadinium goniferum , sample GSAS 6, EF Q49/4. 
 7 Adnatosphaeridium multispinosum , sample GSAS 18, EF K33. 
 8 Glaphyrocysta semitecta , sample TBKS 2, EF S60/1. 
 9 Achomosphaera alcicornu , sample TBKS 3, EF N48/4. 
 10 Cordosphaeridium fibrospinosum , sample GSAS 16, EF
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—Stratigraphic correlation of the Springhill backstepping wedge (location s...
Published: 01 April 1998
, high-resistivity electric-log response yielded by the Barremian shale interval in wells Merluza x-1, Camarón x-1, and Lapa x-1. Micropaleontologic datums are 1 = Muderongia staurata , 2 = Lentic-ulina nodosa and L. Praegaultina , 3 = Batioladinium micropodum , 4 = Achomosphaera neptuni , 5