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Osculosphaera

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Journal Article

Stratigraphic setting and age of the complex Tappania -bearing Proterozoic fossil biota of Siberia

K.E. Nagovitsin, A.M. Stanevich, T.A. Kornilova
Published: 01 November 2010
Russ. Geol. Geophys. (2010) 51 (11): 1192–1198.
DOI: https://doi.org/10.1016/j.rgg.2010.10.004
... complex protists Tappania plana Yin; acritarchs Valeria lophostriata Jank., Satka sp., Lophosphaeridium sp., Pulvinosphaeridium sp., and Miroedichia sp.; porous vesicles of Tasmanites sp. and Osculosphaera sp.; vesicles with anastomosing processes, and spiral filaments of Obruchevella and Glomovertella...
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Microfossil features characteristic of eukaryotic affinity. M...

Published: 01 November 2021
    Germinosphaera alveolata X X       Germinosphaera bispinosa X         Lineaforma elongata   X       Osculosphaera hyalina       X   Pterospermospimorpha insolita         X Satka favosa     X     Simia anulare   X
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Taxa common to the Dzhelindukon (1–9) and Debengde (10–18) biota: 1, 10, Lophosphaeridium sp. with coarse tubercular ornamentation; 2, 11, Lophosphaeridium sp. with elongate claviform processes; 3, 12, Lophosphaeridium sp. with large, short processes; 4, 13, fragment of a large filament with a claviform apex; 5, 14, Glomovertella sp.; 6, 15, Osculosphaera sp.; 7, 16, Obruchevella sp.; 8, 17, remains of large trichome-like forms with narrow cells; 9, 18, short trichomes with arcuate medial cells and lenticular terminal cells.

Taxa common to the Dzhelindukon (1–9) and Debengde (10–18) biota: 1, 10, L...

Published: 01 November 2010
filament with a claviform apex; 5, 14, Glomovertella sp.; 6, 15, Osculosphaera sp.; 7, 16, Obruchevella sp.; 8, 17, remains of large trichome-like forms with narrow cells; 9, 18, short trichomes with arcuate medial cells and lenticular terminal cells.
Journal Article

Shale-hosted biota from the Dismal Lakes Group in Arctic Canada supports an early Mesoproterozoic diversification of eukaryotes

Corentin C. Loron, Galen P. Halverson, Robert H. Rainbird, Tom Skulski, Elizabeth C. Turner, Emmanuelle J. Javaux
Published: 01 November 2021
Journal of Paleontology (2021) 95 (6): 1113–1137.
DOI: https://doi.org/10.1017/jpa.2021.45
...     Germinosphaera alveolata X X       Germinosphaera bispinosa X         Lineaforma elongata   X       Osculosphaera hyalina       X   Pterospermospimorpha insolita         X Satka favosa     X     Simia anulare   X...
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Representative sphaeromorphs. (1) Leiosphaeridia tenuissima Eisenack, 1958, S4-4-F2-7, 13.0 × 137.1, EF-P37-3, VPIGM-4892; (2) Leiosphaeridia jacutica (Timofeev, 1966) Mikhailova and Jankauskas in Jankauskas et al., 1989, S4-4-F2-7, 7.3 × 136.1, EF-V36-1, VPIGM-4893; (3) Leiosphaeridia crassa (Naumova, 1949) Jankauskas in Jankauskas et al., 1989, DH-14-65.0-D-2, 15.2 × 127.8, EF-N27-2, VPIGM-4838; (4) Osculosphaera arcelliformis Liu et al., 2014, DH-14-64.1-C, 13.5 × 137.2, EF-O37-1/3, VPIGM- 4829; (5, 6) Schizofusa zangwenlongii Grey, 2005, DH-14-68.0-A-2, 15.2 × 130.8, EF-N30-4, VPIGM-4861, same specimen at different focal levels, showing asymmetrical split and elongate folds.

Representative sphaeromorphs. ( 1 ) Leiosphaeridia tenuissima Eisenack, ...

Published: 01 March 2024
) Leiosphaeridia crassa (Naumova, 1949 ) Jankauskas in Jankauskas et al., 1989 , DH-14-65.0-D-2, 15.2 × 127.8, EF-N27-2, VPIGM-4838; ( 4 ) Osculosphaera arcelliformis Liu et al., 2014 , DH-14-64.1-C, 13.5 × 137.2, EF-O37-1/3, VPIGM- 4829; ( 5, 6 ) Schizofusa zangwenlongii Grey, 2005 , DH-14-68.0-A-2, 15.2
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Geographical location, structure, and correlation of composite sections in the Baikit (1), Katanga (2), and Olenek (3) areas. 1, limestones; 2–7, dolomites: 2, micritic; 3, argillaceous; 4, a, sandy, 4, b, intraclastic; 5, a, stratiform stromatolitic, 5, b, columnar stromatolitic; 6, a, gravelstones, 6, b, conglomerates; 7, sandstones; 8, siltstones; 9, mudstones; 10, dolerites; 11–22, taxa making up the microfossil assemblage: 11, Tappania; 12, Lophosphaeridium with small processes; 13, Lophosphaeridium with claviform processes; 14, Valeria, 15; Miroedichia, 16; Pulvinosphaeridium, 17; Osculosphaera, 18; Tasmanites, 19; fragments of filaments with claviform apices; 20, Obruchevella; 21, Glomovertella; 22, short trichomes with arcuate medial cells and lenticular terminal cells.

Geographical location, structure, and correlation of composite sections in ...

Published: 01 November 2010
processes; 14 , Valeria , 15 ; Miroedichia , 16 ; Pulvinosphaeridium , 17 ; Osculosphaera , 18 ; Tasmanites , 19 ; fragments of filaments with claviform apices; 20 , Obruchevella ; 21 , Glomovertella ; 22 , short trichomes with arcuate medial cells and lenticular terminal cells.
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Eukaryotic diversity of contemporaneous successions of late Paleoproterozoi...

Published: 01 November 2021
Shuiyousphaeridium macroreticulatum (Yin, 1997 ) Agić et al., 2015 Valeria lophostriata Osculosphaera hyalina Shuiyousphaeridium pilatum Li in Li et al., 2012   Pterospermospimorpha insolita Shuiyousphaeridium sp.   Satka favosa Simia anulare   Simia anulare
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(1) Valeria lophostriata, 76521-t32, 4. (2) Simia annulare, 76091-r27. (3) Pterospermopsimorpha insolita, 76091-v52. (4, 5) Germinosphaera bispinosa: (4) bearing one large process (76801-h28,4); (5) bearing two large processes (DLFC-25; SEM). (6) Osculosphaera hyalina, with a large pylome opening (excystment structure; arrow), 76801-s37,2. (7–9) Dictyosphaera macroreticulata: (7) 76092-n30,1 bearing a pylome opening (arrow); (8) 76567-f45; (9) 75514-o58. (10, 11), Satka favosa: (10) 76803-u34; (11) 76514-m45. (12–14) Spiromorpha segmentata: (12) 76091-j35; (13) 76522-f54, 4; (14) 76511-y41. All photomicrographs taken under transmitted, plane-polarized light. (1–7, 9–14) are from sample HB07-41A 183 m; (8) is from sample HB07-41A 232 m. Scale bar in (9) = 20 μm for (4, 5, 9–11, 13), 30 μm for (1–3, 6, 8, 12), 40 μm for (7), and 50 μm for (14).

( 1 ) Valeria lophostriata , 76521-t32, 4. ( 2 ) Simia annulare , 76091-r...

Published: 01 November 2021
Figure 4. ( 1 ) Valeria lophostriata , 76521-t32, 4. ( 2 ) Simia annulare , 76091-r27. ( 3 ) Pterospermopsimorpha insolita , 76091-v52. ( 4, 5 ) Germinosphaera bispinosa : ( 4 ) bearing one large process (76801-h28,4); ( 5 ) bearing two large processes (DLFC-25; SEM). ( 6 ) Osculosphaera
Journal Article

Mayanian (1100–850 Ma) – Prebaikalian Upper Riphean of Siberia

V.V. Khomentovsky, K.E. Nagovitsin, A.A. Postnikov
Published: 01 January 2008
Russ. Geol. Geophys. (2008) 49 (1): 1–22.
DOI: https://doi.org/10.1016/j.rgg.2007.12.001
... Yin., Pulvinosphaeridium sp., and Lophosphaeridium sp. and other taxa unknown in the obvious Lower-Middle Riphean: elongate vesicles with striate sculpture oriented in length, very large vesicles Majasphaeridium caprogenum Herm., spheroidal vesicles (with a large round pore) of Osculosphaera...
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Journal Article

TOPICAL PROBLEMS OF NEOPROTEROZOIC STRATIGRAPHY IN THE SIBERIAN HYPOSTRATOTYPE OF THE RIPHEAN

V.V. Khomentovsky
Published: 01 May 2005
Russ. Geol. Geophys. (2005) 46 (5): 529–545.
...: Tappania , Pulvinosphaeridium , Cymatiosphaera , Lophosphaeridium , Miroedichia and complicate eukariotic taxa with streaked sculpture ( Valeria ) as well as taxa with porous surface ( Osculosphaera and Tasmanites ) [ 47 , 49 ]. These data certainly extend the microfossil characteristics...
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Systematic paleontology, acritarch biostratigraphy, and δ 13 C chemostratigraphy of the early Ediacaran Krol A Formation, Lesser Himalaya, northern India

Shuhai Xiao, Ganqing Jiang, Qin Ye, Qing Ouyang, Dhiraj M. Banerjee, Birendra P. Singh, A. D. Muscente, Chuanming Zhou, Nigel C. Hughes
Published: 01 March 2024
Journal of Paleontology (2024) 98 (2): 159–220.
DOI: https://doi.org/10.1017/jpa.2022.7
... ) Leiosphaeridia crassa (Naumova, 1949 ) Jankauskas in Jankauskas et al., 1989 , DH-14-65.0-D-2, 15.2 × 127.8, EF-N27-2, VPIGM-4838; ( 4 ) Osculosphaera arcelliformis Liu et al., 2014 , DH-14-64.1-C, 13.5 × 137.2, EF-O37-1/3, VPIGM- 4829; ( 5, 6 ) Schizofusa zangwenlongii Grey, 2005 , DH-14-68.0-A-2, 15.2...
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