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48 results for “Radiolaria”
FIG. 16. — A, B in Lower Tithonian mono- and dicyrtid Nassellaria (Radiolaria) from the Solnhofen area (southern Germany)
FIG. 16. — A, B, Saitoum pagei Pessagno, 1977; A, dorsal view showing slight constrictions along arches Al; B, right lateral view showing remnants of velum; C, D, Saitoum reticulatum n. sp.; C, holotype, left lateral view showing remnants of velum; D, paratype, right lateral view; E, Saitoum sp. aff. S. reticulatum n. sp., right lateral view; F-H, Saitoum virgulispina n. sp., holotype, right lateral, ventral, and basal views respectively; I, J, Saitoum sp. A, right lateral and basal views; K, L, Saitulpus neojurassicus n. gen., n. sp.; K, holotype, left lateral view; L, paratype, dorsal view. Abbreviations: A, apical spine; l, secondary lateral spine. Scale bars: 30 µm.
FIG. 15. — A-C, Saitoum differtum n in Lower Tithonian mono- and dicyrtid Nassellaria (Radiolaria) from the Solnhofen area (southern Germany)
FIG. 15. — A-C, Saitoum differtum n. sp.; A, B, holotype, right lateral and basal views; C, paratype, left lateral view; D, E, N, Saitoum kapewinteri n. sp.; D, N, holotype; D, view from the left primary lateral spine; N, detail, ventral view; E, paratype, ventral view; F-I, L, Saitoum labeosum n. sp.; F, holotype, dorsal view; G-I, L, paratypes; G, ventral view showing the ditreme; H, broken specimen, right lateral view showing the thin apical spine and thick median bar; I, specimen with distally closed velum; L, basal view showing the left secondary lateral spine prolonged outside (anomaly?); J, K, M, Saitoum macilentum n. sp.; J, M, holotype, dorsal and basal views; K, paratype, left lateral view showing a strong arch Al. Abbreviations: A, apical spine; l, secondary lateral spine. Scale bars: 30 µm.
FIG. 12. — A, B, D, Turriseiffelus invalidus n. gen., n in Lower Tithonian mono- and dicyrtid Nassellaria (Radiolaria) from the Solnhofen area (southern Germany)
FIG. 12. — A, B, D, Turriseiffelus invalidus n. gen., n. sp.; A, holotype; B, D, paratypes; D, basal view of initial spicule and arches; C, E, Turriseiffelus sp.; C, right lateral view; E, basal view showing details of the initial spicule and arches. Scale bars: A, B, 100 µm; C, 30 µm; D, E, 10 µm.
FIG. 21. — A-D, L, Cassideus biannulatus n in Lower Tithonian mono- and dicyrtid Nassellaria (Radiolaria) from the Solnhofen area (southern Germany)
FIG. 21. — A-D, L, Cassideus biannulatus n. sp.; A, B, holotype, left lateral and basal views; C, D, L, paratypes; C, right lateral view; D, latero-apical view; L, basal view of initial spicule showing the absence of dorsal spine; E, F, Cassideus deweveri n. sp.; E, holotype, left lateral view; F, paratype, right lateral view; G-I, Cassideus scalariconus n. sp.; G, H, holotype, right lateral and basal views; I, paratype, left lateral view; J, K, Cuniculiformis sp., fragment, basal and left lateral views. Scale bars: A-K, 30 µm; L, 10 µm.
FIG. 24. — A-C, I, J, Reticulotubulus tintinnabulum n in Lower Tithonian mono- and dicyrtid Nassellaria (Radiolaria) from the Solnhofen area (southern Germany)
FIG. 24. — A-C, I, J, Reticulotubulus tintinnabulum n. sp.; A, B, I, J, holotype, left lateral and basal views with details of the proximal part of shell and of the initial spicule, note prolongation of ventral spine along the tube; C, paratype, right lateral view; D-H, Cornutella tella n. sp.; D, holotype; E-H, paratypes; E, basal view; F, apically broken specimen with garland-shaped distal end; G, young specimen; H, specimen with large terminal pores. Scale bars: A-I, 30 µm; J, 10 µm.
FIG. 11. — Turriseiffelus invalidissimus n. gen., n in Lower Tithonian mono- and dicyrtid Nassellaria (Radiolaria) from the Solnhofen area (southern Germany)
FIG. 11. — Turriseiffelus invalidissimus n. gen., n. sp.; A, holotype showing the well preserved apical horn; B-F, paratypes; B, specimen with partly preserved apical horn; C, specimen with apical horn corroded; D, same, detail of one foot; E, specimen with apical horn corroded; F, basal view of the initial spicule and arches. Scale bars: A-C, E, 30 µm; D, F, 10 µm.
FIG. 10. — Tetrarchiplagia tithoniana n in Lower Tithonian mono- and dicyrtid Nassellaria (Radiolaria) from the Solnhofen area (southern Germany)
FIG. 10. — Tetrarchiplagia tithoniana n. sp., holotype, left lateral view; note that spines A and Lr are broken off. Abbreviations: A, apical spine; D, dorsal spine; Ll, left primary lateral spine; Lr, right primary lateral spine; V, ventral spine. Scale bar: 0.1 mm.
FIG. 9. — A-I, Tetrarchiplagia ramosa n in Lower Tithonian mono- and dicyrtid Nassellaria (Radiolaria) from the Solnhofen area (southern Germany)
FIG. 9. — A-I, Tetrarchiplagia ramosa n. sp.; A, holotype, right lateral view; B-I, paratypes; B, C, left lateral and apical views of the same specimen; D, E, left lateral view and detail of apical spine of the same specimen; F, right lateral view of a specimen showing a smaller angle between D and L; G, oblique ventral view; H, dorsal view of a small specimen with strongly curved D and L; I, left lateral view, detail of the central part showing the slender ventral spine and Ll broken off; J, Tetrarchiplagia tithoniana n. sp., paratype, apical view. Abbreviations: D, dorsal spine; L, primary lateral spine; Ll, left primary lateral spine. Scale bars: A-D, F-H, J, 100 µm; E, I, 30 µm.
FIG. 30. — A, B, Napora timida n in Lower Tithonian mono- and dicyrtid Nassellaria (Radiolaria) from the Solnhofen area (southern Germany)
FIG. 30. — A, B, Napora timida n. sp.; A, holotype, view from Lr; B, paratype, view from Lr; C, Poculinapora tripartita n. gen., n. sp., holotype, view from Lr; D, E, Poculinapora marsupialia n. gen., n. sp; D, holotype, view from Ll; E, paratype, dorsal view; F-I, Poculinapora poculigera n. gen., n. sp.; F, I, holotype, view from Lr and detail of apical horn; G, H, paratype, view from Lr and detail of apical horn in subapical view. Abbreviations: Ll, left primary lateral spine; Lr, right primary lateral spine. Scale bars: A-G, 100 µm; H, 30 µm; I, 10 µm.
FIG. 8. — Arachnoplecta architectonica n. gen., n in Lower Tithonian mono- and dicyrtid Nassellaria (Radiolaria) from the Solnhofen area (southern Germany)
FIG. 8. — Arachnoplecta architectonica n. gen., n. sp., holotype; A, basal view (dorsal spine is directed towards the base of the figure and ventral spine towards the upper part); B, dorsal view (apical spine is directed towards the upper part of the figure); C, detail of A showing the median bar, the two primary lateral spines, and the ventral spine; D, detail of the left primary lateral spine with bars aligned to the central rod. Scale bars: A, B, 100 µm; C, D, 30 µm.
FIG. 6 in Lower Tithonian mono- and dicyrtid Nassellaria (Radiolaria) from the Solnhofen area (southern Germany)
FIG. 6. — Stratigraphic range of monocyrtid and dicyrtid radiolarian families and genera described in the present paper. Stratigraphic intervals without evidence in dotted lines, early Tithonian occurences from the Solnhofen area indicated by squares.
FIG. 7 in Lower Tithonian mono- and dicyrtid Nassellaria (Radiolaria) from the Solnhofen area (southern Germany)
FIG. 7. — Structure of the skeleton of Arachnoplecta architectonica n. gen., n. sp. Abbreviations: A, apical spine; ADl, left junction area among one planiform structure of the apical spine, one of the dorsal spine, and one of the left primary spine; ADr, right junction area among one planiform structure of the apical spine, one of the dorsal spine, and one of the right primary lateral spine; D, dorsal spine; Lr, right primary lateral spine; Ll, left primary lateral spine; MB, median bar; V, ventral spine.
FIG. 5 in Lower Tithonian mono- and dicyrtid Nassellaria (Radiolaria) from the Solnhofen area (southern Germany)
FIG. 5. — Quantitative distribution of monocyrtid and dicyrtid radiolarian genera in sample Mue 22, based on 300 specimens.
FIG. 4 in Lower Tithonian mono- and dicyrtid Nassellaria (Radiolaria) from the Solnhofen area (southern Germany)
FIG. 4. — Distribution of different species of Napora Pessagno, 1977 in sections. Note the common occurrence of the robust Napora pacifica Kiessling, 1999 and the high diversity in Mue 22. For legend, refer to Fig. 2.
FIG. 2 in Lower Tithonian mono- and dicyrtid Nassellaria (Radiolaria) from the Solnhofen area (southern Germany)
FIG. 2. — Distribution of monocyrtid and dicyrtid nassellarian genera in sections. Note the contrast between the wide distribution of low diverse associations with Saitoum Pessagno, 1977 and Napora Pessagno, 1977 compared to the high diversity in sample Mue22.
FIG. 3 in Lower Tithonian mono- and dicyrtid Nassellaria (Radiolaria) from the Solnhofen area (southern Germany)
FIG. 3. — Distribution of different species of Saitoum Pessagno, 1977 in sections. Note the ubiquitous occurrence of the very robust species Saitoum labeosum n. sp. and the high diversity in sample Mue 22. For legend, refer to Fig. 2.
FIG. 1 in Lower Tithonian mono- and dicyrtid Nassellaria (Radiolaria) from the Solnhofen area (southern Germany)
FIG. 1. — Locality map with sections Mühlheim, Schaudiberg old quarry (Mue), Mühlheim, Schaudiberg new quarry (SB), Horstberg, southern quarry (Hob 1-31), and Horstberg, northern quarry (Hob 32-57).
Progress in understanding middle Eocene nassellarian (Radiolaria, Polycystinea) diversity; new insights from the western equatorial Atlantic Ocean
<p>Middle Eocene deep-sea sediment sequences cored at Ocean Drilling Program Site 1260 (Leg 207; equatorial Atlantic Ocean), yielded diverse and abundant radiolarian faunas which are conducive to biostratigraphic and palaeoceanographic researchs, as well as to the study of radiolarian diversity dynamics during this epoch of dramatic climate changes. However, many species present in these sediments still have not been formally described and are therefore neglected in most biodiversity surveys. In an effort to improve the taxonomic resolution of middle Eocene radiolaria, 15 new species of nassellarian are described and illustrated. The species are: Cymaetron ? dilatatus n. sp., Eucyrtidium levisaltatrix n. sp. (Eucyrtidiidae), Siphocampe pollen n. sp., Spirocyrtis ? renaudiei n. sp. (Artostrobiidae), Pterocyrtidium eep n. sp. (Rhopalosyringiidae), Petalospyris cometa n. sp., Petalospyris castanea n. sp. (Cephalospyrididae), Velicucullus armatus n. sp. (Theophormididae), Lychnocanium nimrodi n. sp. (Lithochytrididae), Aphetocyrtis zamenhofi n. sp., Aphetocyrtis ? columboi n. sp., Aphetocyrtis ? spheniscus n. sp. (Lophocyrtiidae), Albatrossidium regis n. sp., Albatrossidium annikasanfilippoae n. sp. and Phormocyrtis lazari n. sp. (Pterocorythidae). Stratigraphic range data are provided for each new species, as well as the orbitally tuned ages for their first and last occurrences. In addition to these new species, we also illustrated and documented the stratigraphic distribution of three species described in early radiolarian studies and rarely reported since.</p>
Fig. 7. - Humerocyrtis n in New Middle Triassic Bell-Shaped Nassellarian Radiolaria From Alpine And Carpathian Areas
Fig. 7. - Humerocyrtis n. sp., H – shoulder, Rc4.
Radiolaria specimens from Korsfjorden Nov 1969 - May 1971 source data
<p>Originally published on GBIF.org - https://doi.org/10.15468/jhkb5u</p> <p>This dataset is the result of a radiolarian sampling program from Korsfjorden (60.19110 N,5.23136 E), on the west coast of Norway near Bergen, that took place from November 1969 and ended in May 1971. At the sampling location the fjord depth is 670 m. The water column was divided into 100 m depth zones (100-0 m, 200-100 m, ….600-500 m, and 650-600 m) except for the deepest zone where the sampling started ca. 20 m above the mud line to avoid contamination of the net. At each sampling date all depth zones were sampled. A plankton net with 63 µm mesh opening was used. This dataset also includes the phaeodarians found in this dataset. A total of 72 species was observed. A discussion of this dataset can be found in: </p> <p>Bjørklund, K.R., 1974. The seasonal occurrence and depth zonation of radiolarians in Korsfjorden, Western Norway. Sarsia, 56: 13-42.</p>
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