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167 results for “Radiolarians”
Fig. 9 in Siliceous biota (radiolarians and sponges) and the Late Devonian biotic crisis: The Polish reference
Fig. 9. Entactiniid (A–F) and albaillellid (G, H) radiolarians from the Kowala Quarry, set H−3, earliest Famennian (Middle Pa. triangularis Zone), sample Kw−154, all × 75. A. Trilonche grandis. B. Stigmospherostylus crustescens. C–E. Trilonche guangxiensis. F. Polyentactinia tenera. G, H. Albaillella sp. All SEM micrographs.
Fig. 7. Entactiniid radiolarians from the Kowala Quarry, set H−3 in Siliceous biota (radiolarians and sponges) and the Late Devonian biotic crisis: The Polish reference
Fig. 7. Entactiniid radiolarians from the Kowala Quarry, set H−3, earliest Famennian (Middle Pa. triangularis Zone), sample Kw−154, all × 75. A–C, E. Haplentactinia cf. rhinophyusa. D. Spongentactinella sp. F, G. Haplentactinia cf. inaudita. All SEM micrographs.
Fig. 4. Entactiniid radiolarians from the Kowala Quarry, set H−3 in Siliceous biota (radiolarians and sponges) and the Late Devonian biotic crisis: The Polish reference
Fig. 4. Entactiniid radiolarians from the Kowala Quarry, set H−3, earliest Famennian (Middle Pa. triangularis Zone), sample Kw−154, all × 150 except J × 240. A–C. Astroentactinia stellaepolus. D. Stigmospherostylus diversita. E, G. Astroentactinia stellata. F. Astroentactinia cf. crassata. H. Stigmospherostylus cf. micula. I, J. Helioentactinia cf. perjucunda.
Fig. 3 in Siliceous biota (radiolarians and sponges) and the Late Devonian biotic crisis: The Polish reference
Fig. 3. Radiolarian−spiculite facies, set H−3, Frasnian–Famennian boundary beds at Kowala quarry, Poland (see Figs. 1C, D and 2; Racki 1999: fig. 2). A. Field photo of a laminated (marginally−agraded) limestone bed with black bedded chert; arrowed is a lighter diagenetically unaffected band. B. Radiolarian−spiculite limestone packstone (sample Kw−154), with mostly incipiently neomorphozed micritic matrix and numerous pyrite aggregations in the upper part.
Fig. 2 in Siliceous biota (radiolarians and sponges) and the Late Devonian biotic crisis: The Polish reference
Fig. 2. Micropalaeontological characteristics of the upper Frasnian and Frasnian–Famennian passage at Kowala, based on the eastern quarry wall section + from 1991 (section Kw). The material obtained from marly−shaly samples, supplemented by few conodont samples and thin sections for the unit H−3. Productive radiolarian (R) and spicule (S) samples studied (see Fig. 3 and Table 2) are arrowed. 1, tentaculitoids; 2, entomozoids; 3, large−sized palynomorphs; 4, goniatites; 5, ichtyolithes; 6, palmatolepid conodonts; 7, polygnathid conodonts; 8, ramose conodont elements; 9, phyllocarid remains; 10, benthic ostracods; 11, nanicellid foraminiferans; 12, sponge spicules; 13, rhynchonellid brachiopods;14, chonetid brachiopods; 15, lingulids; 16, phosphatized burrow fills and pellets; 17, agglutinated foraminiferans; 18, icriodontid conodonts; 19, echinoderm remains; 20, ramose fossils (a, amphiporid stromatoporoids; b, others [fragmented?auloporids]); 21, sphaerical microfossils (?mostly calcispheroids).
Fig. 1. A, B in Siliceous biota (radiolarians and sponges) and the Late Devonian biotic crisis: The Polish reference
Fig. 1. A, B. Location of the Kowala basin succession in Poland (A) and Holy Cross Mountains (B; see details in Racki 1993). C. Composite lithological section of the Late Devonian strata at Kowala (modified after Szulczewski 1996: fig. 8), the reference succession showing environmental evolution typical of intermittently drowned shelf from reef (units A–C) to slope (D–G) to intrashelf basin (H–L). Three sampled radiolarian−sponge intervals are arrowed. D. Sedimentary record of eustatic, anoxic and tectono−volcanic events around the Frasnian–Famennian boundary, with emphasis on selected biotic markers. Note blooms of siliceous biota, thought as promoted mostly by submarine exhalative volcanism paired with tectonically−driven shallowing, and a cooling pulse (see Racki 1999; Racki et al. 2002).
Fig. 4 in Applications and limitations of micro-XCT imaging in the studies of Permian radiolarians: A new genus with bi-polar main spines
Fig. 4. Dendrogram of the cluster analysis under the corresponding analysis based on nine genera (performed by software "R" and the EZR).
Fig. 3 in Applications and limitations of micro-XCT imaging in the studies of Permian radiolarians: A new genus with bi-polar main spines
Fig. 3. Schematic drawings on internal structure of Permian and Mesozoic spumellarians with bi-polar main spines (detailed information including source is summarized in Table 2). A, B. Protopsium. C. Pegoxystris. D. Falcispongus. E. Spongoxystris. F. Dalongicaepa Xiao and Suzuki gen. nov. G. Spongotortilispinus. H. Spongopallium. I, J. Archaeospongoprunum. K. Palaeospongurus. L. Paroertlispongus.
Fig. 2 in Applications and limitations of micro-XCT imaging in the studies of Permian radiolarians: A new genus with bi-polar main spines
Fig. 2. Micro-XCT cross-sectional images (A, B), SEM micrographs (C–E), and TLM micrographs (F) of the spumellarian Tetraspongodiscus stauracanthus Feng in Feng et al., 2006 from Changhsingian of the Rencunping section (A–D) and Dongpan (E), South China and upper Capitanian of West Texas, USA (F). A. LGFEC SR 33-201. B. LGFEC SR 33-202. C. LGFEC SR 36-011. D. LGFEC SR 33-022. E. DP 4/4860 (from Feng et al. 2006; copyright is permitted from Elsevier). F. S3-2A (from Noble and Jin 2010). Different cross sections show clear hoops with few primary beams and a possible median bar (A1 and B1), the centrical internal spicule (A2), and the embedded proximal part of the main spines (B2). Scale bars 50 μm.
Fig. 14 in Neogene radiolarian biostratigraphy and faunal evolution rates in the eastern equatorial Pacific ODP Sites 845 and 1241
Fig. 14. Radiolarians from the early Miocene to Pleistocene of the eastern equatorial Pacific. A. Calocycletta (Calocyclissima) costata (Riedel, 1959). MPC−3324; 845A−26XCC, R19/4; Zone RN5. B. Calocycletta (Calocycletta) robusta Moore, 1971. MPC−3326; 845A−28XCC, Q40/3; Zone RN4. C. Calocycletta (Calocycletta) virginis (Haeckel, 1887). MPC−3326; 845A−28XCC, V46/3; Zone RN4. D. Calocycletta (Calocycletta) cladara Sanfilippo and Riedel, 1992. MPC−3299; 845A−11HCC, K47/4; Zone RN7. E. Calocycletta (Calocyclior) caepa Moore, 1972. MPC−4852; 1241A−30H−07, 62–64 cm, R51/4; Zone RN7. F. Liriospyris reticulata (Ehrenberg, 1872). MPC−3337; 1241A−3H−04, 75–77 cm, Q49/3; Zone RN14. G. Dendrospyris bursa Sanfilippo and Riedel, 1973. MPC−3325; 845A−27XCC, N27/0; Zone RN4. Scale bars 100 µm.
Fig. 13 in Neogene radiolarian biostratigraphy and faunal evolution rates in the eastern equatorial Pacific ODP Sites 845 and 1241
Fig. 13. Radiolarians from the early Miocene to Pleistocene of the eastern equatorial Pacific. A. Lophocyrtis (Cyclampterium) leptetrum (Sanfilippo and Riedel, 1970). MPC−3322; 845A−24XCC, R43/3; Zone RN5. B. Lophocyrtis (Cyclampterium) neatum (Sanfilippo and Riedel, 1970). MPC−4847; 1241A−29H−03, 62–64 cm, O14/0; Zone RN7. C. Lophocyrtis (Cyclampterium) tanythorax (Sanfilippo and Riedel, 1970). MPC−4854; 1241A−31H−03, 62–64 cm, L40/0; Zone RN7. D. Lophocyrtis (Cyclampterium) brachythorax (Sanfilippo and Riedel, 1970). MPC−4870; 1241A−36X−03, 62–64 cm, S32/3; Zone RN6. E. Nephrospyris renilla Haeckel, 1887. MPC−3337; 1241A−3H−04, 75–77 cm, T37/0; Zone RN14. F. Dorcadospyris alata (Riedel, 1959). MPC−3322; 845A−24XCC, R45/0; Zone RN5. G. Dorcadospyris dentata Haeckel, 1887. MPC−3328; 845A−30XCC, G39/0; Zone RN4. Scale bars 100 µm.
Fig. 12 in Neogene radiolarian biostratigraphy and faunal evolution rates in the eastern equatorial Pacific ODP Sites 845 and 1241
Fig. 12. Radiolarians from the early Miocene to Pleistocene of the eastern equatorial Pacific. A. Lychnodictyum audax Riedel, 1953. MPC−3388; 1241A−21H−04, 62–64 cm, W15/1; Zone RN9. B. Pterocanium prismatium Riedel, 1957. MPC−3280; 845A−4HCC, R47/0; Zone RN13. C. Dictyophimus crisiae Ehrenberg, 1854. MPC−3333; 1241A−2H−05, 75–77 cm, U31/4; Zone RN15. D. Valkyria pukapuka O'Connor, 1997. MPC−3326; 845A−28XCC, O20/0; Zone RN4. E. Liriospyris parkerae Riedel and Sanfilippo, 1971. MPC−3324; 845A−26XCC, R39/0; Zone RN5. F. Dictyophimus splendens (Campbell and Clark, 1944). MPC−4835; 1241A−23H−03, 62–64 cm, K40/2; Zone RN9. G. Pterocanium korotnevi (Dogiel, 1952). MPC−3386; 1241A−20H−05, 62–64 cm, G24/0; Zone RN9. H. Acrocubus octopylus Haeckel, 1887. MPC−3326; 845A−28XCC, R39/4; Zone RN4. I. Tholospyris anthopora (Haeckel, 1887). MPC−3328; 845A−30XCC, P53/3; Zone RN4. J. Lithomelissa sp. B. MPC−3318; 845A−20HCC, P23/3; Zone RN5. K. Cycladophora davisiana Ehrenberg, 1861. MPC−3333; 1241A−2H−05, 75–77 cm, P28/2; Zone RN15. L. Tholospyris kantiana (Haeckel, 1887). MPC−3324; 845A−26XCC, X28/4; Zone RN5. M. Pterocanium sp. TX. MPC−3319; 845A−21HCC, X47/0; Zone RN5. N. Pterocanium praetextum praetextum (Ehrenberg, 1872). MPC−3357; 1241A−9H−05, 62–64 cm, E51/0; Zone RN11. O. Pterocanium praetextum eucolpum Haeckel, 1887. MPC−3338; 1241A−3H−05, 75–77 cm, R22/2; Zone RN14. P. Giraffospyris toxaria (Haeckel, 1887). MPC−3326; 845A−28XCC, R27/2; Zone RN4. Q. Acrobotrys tritubus Riedel, 1957. MPC−3299; 845A−11HCC, H48/2; Zone RN7. Scale bars 100 µm.
Fig. 11 in Neogene radiolarian biostratigraphy and faunal evolution rates in the eastern equatorial Pacific ODP Sites 845 and 1241
Fig. 11. Radiolarians from the early Miocene to Pleistocene of the eastern equatorial Pacific. A. Anthocyrtidium jenghisi Streeter, 1988. MPC−3358; 1241A−10H−03, 62–64 cm, H56/0; Zone RN11. B. Anthocyrtidium ophirense (Ehrenberg, 1872). MPC−3333; 1241A−2H−05, 75–77 cm, M52/4; Zone RN15. C. Anthocyrtidium angulare Nigrini, 1971. MPC−3345; 1241A−4H−06, 75–77 cm, J45/0; Zone RN13. D. Anthocyrtidium ehrenbergi (Stöhr, 1880). MPC−3372; 1241A−15H−03, 62–65 cm, G21/0; Zone RN9. E. Lamprocyrtis nigriniae (Caulet, 1971). MPC−3333; 1241A−2H−05, 75–77 cm, Q17/2; Zone RN15. F. Lamprocyrtis neoheteroporos Kling, 1973. MPC−3345; 1241A−4H−06, 75–77 cm, G26/0; Zone RN13. G. Lamprocyrtis heteroporos (Hays, 1965). MPC−3349; 1241A−6H−04, 77–79 cm, W35/3; Zone RN12. H. Anthocyrtidium zanguebaricum (Ehrenberg, 1872). MPC−3361; 1241A−11H−04, 62–64 cm, O20/2; Zone RN10. I. Anthocyrtidium pliocenica (Seguenza, 1880). MPC−3371; 1241A−14H−05, 62–64 cm, A14/3; Zone RN9. J. Lamprocyclas maritalis polypora Nigrini, 1967. MPC−3333; 1241A−2H−05, 75–77 cm, G53/2; Zone RN15. K. Theocorythium trachelium trachelium (Ehrenberg, 1872). MPC−3332; L Ą 1241A−2H−03, 75–77 cm, L19/0; Zone RN16.. Theocorythium trachelium dianae (Haeckel, 1887). MPC−3338; 1241A−3H−05, 75–77 cm, P26/0; Zone RN14.
Fig. 8 in Neogene radiolarian biostratigraphy and faunal evolution rates in the eastern equatorial Pacific ODP Sites 845 and 1241
Fig. 8. Radiolarians from the early Miocene to Pleistocene of the eastern equatorial Pacific. A. Spongaster berminghami (Campbell and Clark, 1944). MPC−4845; 1241A−28H−03, 62–64 cm, T51/2; Zone RN7. B. Spongaster pentas Riedel and Sanfilippo, 1970. MPC−3363; 1241A−12H−03, 62–64 cm, W33/0; Zone RN9. C. Spongaster tetras tetras Ehrenberg, 1860. MPC−3332; 1241A−2H−03, 75–77 cm, Q52/3; Zone RN16. D. Larcospira quadrangula Haeckel, 1887. MPC−3357; 1241A−9H−05, 62–64 cm, E51/0; Zone RN11. E. Larcospira moschkovskii Kruglikova, 1978. MPC−4847; 1241A−29H−03, 62–64 cm, G47/0; Zone RN7. F. Dictyocoryne ontongensis Riedel and Sanfilippo, 1971. MPC−3303; 845A−13HCC, X31/2; Zone RN6. G. Amphirhopalum ypsilon Haeckel, 1887. MPC−3332; 1241A−2H−03, 75–77 cm, T45/0; Zone RN16. H. Spongodiscus klingi Caulet, 1986. MPC−3336; 1241A−3H−03, 77–79 cm, X26/1; Zone RN14. I. Collosphaera brattstroemi Bjørklund and Goll, 1979. MPC−3317; 845A−20HCC, K51/1; Zone RN5. J. Trisolenia megalactis megalactis Ehrenberg, 1872. MPC−3317; 845A−20HCC, Q53/0; Zone RN5. K. Trisolenia megalactis costlowi Bjørklund and Goll, 1979. MPC−3324; 845A−26XCC, G37/4; Zone RN5. Scale bars 100 µm.
Fig. 9 in Neogene radiolarian biostratigraphy and faunal evolution rates in the eastern equatorial Pacific ODP Sites 845 and 1241
Fig. 9. Radiolarians from the early Miocene to Pleistocene of the eastern equatorial Pacific. A. Didymocyrtis prismatica (Haeckel, 1887). MPC−3328; 845A−30XCC, J23/2; Zone RN4. B. Didymocyrtis tubaria (Haeckel, 1887). MPC−3328; 845A−30XCC, P23/0; Zone RN4. C. Didymocyrtis violina (Haeckel, 1887). MPC−3330; 845A−31X−03, 0–2 cm, K36/0; Zone RN4. D. Didymocyrtis mammifera (Haeckel, 1887). MPC−3320; 845A−22HCC, S46/3; Zone RN5. E. Didymocyrtis laticonus (Riedel, 1959). MPC−4855; 1241A−31H−05, 62–64 cm, R49/2; Zone RN6. F. Didymocyrtis antepenultima (Riedel and Sanfilippo, 1970). MPC−4849; 1241A−30H−01, 62–64 cm, J26/3; Zone RN7. G. Didymocyrtis penultima (Riedel, 1957). MPC−3373; 1241A−15H−05, 62–64 cm, U31/0; Zone RN9. H. Didymocyrtis bassanii (Carnevale, 1908). MPC−3322; 845A−24XCC, S48/4; Zone RN5. I. Diartus hughesi (Campbell and Clark, 1944). MPC−4847; 1241A−29H−03, 62–64 cm, T25/1; Zone RN7. J. Diartus petterssoni (Riedel and Sanfilippo, 1970). MPC−4863; 1241A−34H−01, 62–64 cm, R32/4; Zone RN6. K. Didymocyrtis avita (Riedel, 1953). MPC−3373; 1241A−15H−05, 62–64 cm, V51/0; Zone RN9. L. Didymocyrtis tetrathalamus (Haeckel, 1887). MPC−3332; 1241A−2H−03, 75–76 cm, X43/0; Zone RN16. M. Periphaena decora Ehrenberg, 1873. MPC−3326; 845A−28XCC, S37/0; Zone RN4. N. Collosphaera tuberosa Haeckel, 1887. MPC−3331; 1241A−2H−02, 75–76 cm, K23/0; Zone RN16. O. Stylatractus universus Hays, 1970. MPC−3331; 1241A−2H−05, 75–77 cm, U32/0; Zone RN15. P. Axoprunum stauraxonium Haeckel, 1887. MPC−3331; 1241A−2H−02, 75–77 cm, W25/0; Zone RN16. Q. Amphisphaera? sp. D. MPC−3326; 845A−28XCC, K18/4; Zone RN4. R. Lithelius klingi Kamikuri, 2009. MPC−3324; 845A−26XCC, W34/0; Zone RN5. S. Solenosphaera omnitubus procera Sanfilippo and Riedel, 1974. MPC−3383; 1241A−19H−05, 62–64 cm, U51/3; Zone RN9. T. Solenosphaera omnitubus omnitubus Riedel and Sanfilippo, 1971. MPC−4834; 1241A−22H−05, 62–64 cm, F36/0; Zone RN9. Scale bars 100 µm.
Fig. 3 in Neogene radiolarian biostratigraphy and faunal evolution rates in the eastern equatorial Pacific ODP Sites 845 and 1241
Fig. 3. Age−depth plot of Sites 845 and 1241. Geomagnetic polarity time scale is after Ogg and Smith (2004). The symbols "N1" to "N24", "F1" and "F2" for the control correspond to those in Tables 1 and 2.
Fig. 7 in Neogene radiolarian biostratigraphy and faunal evolution rates in the eastern equatorial Pacific ODP Sites 845 and 1241
Fig. 7. Comparison of the appearance and extinction rates of radiolarians in the eastern equatorial Pacific during the last 17 Ma with a generalized benthic foraminiferal oxygen isotope curve and tectonic events. The isotope curve is after Mix et al. (1995) for the interval between 0 and 2.5 Ma and after Kennett (1986) for the interval between 2.5 and 17 Ma. The isotope curve has been updated to the ATNTS 2004 (Ogg and Smith, 2004) through paleomagnetic correlation provided by Barton and Bloemendal (1986). The isotope events are after Miller et al. (1991) and Barron and Baldauf (1990).
Fig. 2 in Neogene radiolarian biostratigraphy and faunal evolution rates in the eastern equatorial Pacific ODP Sites 845 and 1241
Fig. 2. Modern surface water circulation and location of ODP Sites 845 and 1241 used to determine stratigraphic ranges of radiolarian species in the eastern equatorial Pacific Ocean. NEC, North Equatorial Current; ECC, Equatorial Countercurrent; SEC, South Equatorial Current.
Fig. 3 in Volgian and Santonian-Campanian radiolarian events of the Russian Arctic and Pacific Rim
Fig. 3. Types of microfaunas from Kamchatka. A–J. Palana Section: Campanian spumellarians (A–D), Santonian foraminifera (E–G), Santonian radiolarians (H–J). K–R. Omgon section: Tithonian parvicingulids (K–N), Jurassic nassellarians (O–R). A–C. Lithomespilus mendosa (Krasheninnikov, 1960). A. GIN 76a. B. GIN 76b. C. GIN 76c. D. Amphisphaera goruna (Sanfilippo and Riedel, 1973), GIN 76/v. E. Archeoglobigerina bosqiensis Pessagno, 1967, GIN N 173/99/F1. F. Hedbergella holmdelensis Olsson, 1964, GIN N 173/99/F2. G. Hedbergella delrioensis (Carsey, 1926), GIN N 159/99. H. Pseudoaulophacus venadoensis Pessagno, 1976, GIN N 202/01/1. I, J. Pseudoaulophacus floresensis Pessagno, 1963. I. GIN N 202/01/2. J. GIN N 202/ 01/3. K–N. Parvicingula omgoniensis Vishnevskaya, 1998. K. GIN N 604/3k. L. GIN N 604/3l. M. GIN N 604/3m. N. GIN N 604/3n. O–R. Parvicingula sp. O. GIN N 603/5/7. P. GIN N 603/5/2. Q. GIN N 603/5/5. R. GIN N 603/5/1.
Fig. 7 in Volgian and Santonian-Campanian radiolarian events of the Russian Arctic and Pacific Rim
Fig. 7. Scanning electron micrographs of Late Cretaceous (Early Campanian) radiolarians from siliceous rocks of the Russian Arctic Margin (western Siberia, borehole 22, Ust−Manja, sample 57), except for D which is from the Volga Basin, Uljanovsk region, Shilovka section, sample 7−1. A–C. Spongurus arcticus Kozlova and Vishnevskaya sp. nov. A. Holotype, GIN N K22−2−57. B. GIN N K22−2a−57. C. GIN N K22−2b−57. D–F. Prunobrachium articulatum (Lipman, 1952). D. GIN N K22−15a−57. E. GIN N K22−15b−57. F. GIN N K22−15c−57. G, K–N. Lithostrobus ex gr. rostovzevi Lipman, 1960. G. GIN N K22−1a−57/1. K. GIN N K22−1b−57/1. L. GIN N K22−1c−57/2. M. GIN N K22−1c−57. N. GIN N K22−1d−57. H–J. Lithostrobus borealis Kozlova and Vishnevskaya sp. nov. H. GIN N K22−1a−57. I. GIN N K22−1b−57. J. Holotype, GIN N K22−1−57. O. Lithostrobus longus Grigorieva, 1975; GIN N K22−11−57. P–R. Immersothorax marinae (Gorbovets, 1966). P. GIN N K22−12−57. Q. GIN N K22−12a−57. R. GIN N K22−12b−57. S. Amphipyndax stocki (Campbell and Clark, 1944), GIN N K22−13−57.
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