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287 results for “Middle Ordovician”
Fig. 12 in Early-Middle Ordovician cephalopods from Ny Friesland, Spitsbergen - a pelagic fauna with Laurentian affinities
Fig. 12 (previous page). Apical parts of orthoconic cephalopods from the Olenidsletta Member, Floian, Ordovician, near Hinlopenstretet, Ny Friesland, Spitsbergen. A. Cyptendoceras sp. B., FMNH-P30472 from Profilbekken river basin, locality PR-phosphatic. Lateral view with siphuncle toward the left. B. Svalbardoceras sterna gen. et sp. nov, FMNH-P30169, from PO 7.5. Lateral view with siphuncle toward left. C, F–G. Eosomichelinoceras borealis sp. nov. C. Specimen FMNH-P30171, from bed PO 123.3. Lateral view with prosiphuncular side toward the right. D. Bactroceras fluvii sp. nov., FMNH-P30168, from Profilbekken river basin, locality PR-phosphatic, showing the ventral side with ventral sutural lobe. E, H, J. Bactroceras boliviensis Aubrechtová, 2015 from bed PO 131. E. Specimen FMNH-P30165, nearly dorsal view, showing the transition of the extreme apical part toward the juvenile part of the conch. F. Specimen FMNH-P30182, lateral view with siphuncle toward the right. G. Specimen FMNH-P30184, lateral view with siphuncle toward the left. H. Specimen FMNH-P30183, apical view, showing the smooth apical surface of the protoconch. I. Ethanoceras solitudines gen. et sp. nov., FMNH-P30173, from bed PO 123.3, note the fine transverse striation. J. FMNH-P30160, showing details of fine transverse ornamentation. Scale bar = 2 mm for all figures.
Fig. 49 in Early-Middle Ordovician cephalopods from Ny Friesland, Spitsbergen - a pelagic fauna with Laurentian affinities
Fig. 49. Median sections of phragmocones of cephalopods from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. A. Order, gen. et sp. indet. B, FMNH-P30424, from bed 4.8, see also Fig. 11A for interpretation. B–C. Nyfrieslandoceras bassleroceroides gen. et sp. nov., FMNH-P30353, holotype, from bed PO 131. B. Detail with septa and siphuncle preserved, septa are crushed and taphonomically distorted. C. Detail of septal necks and connecting ring, see Fig. 8D for interpretation. Scale bars: A–B = 5 mm; C = 1 mm.
Fig. 40 in Early-Middle Ordovician cephalopods from Ny Friesland, Spitsbergen - a pelagic fauna with Laurentian affinities
Fig. 40. Diagrams of relative siphuncular diameter and relative siphuncular distance of Eosomichelinoceras borealis gen. et sp. nov. from the Olenidsletta Member, Floian, Ordovician, Profilstranda section, Ny Friesland, Spitsbergen. See Supp. file 1 for details of measurements.
Fig. 27 in Taxonomy and ontogeny of the Lituitida (Cephalopoda) from Orthoceratite Limestone erratics (Middle Ordovician)
Fig. 27. Angelinoceras latum (Angelin, 1880); reproductions of illustrations of Remelé (1890). A. Specimen MB.C.11682 from Eberswalde (Brandenburg), illustrated by Remelé (1890: pl. 1 fig. 4). B. Specimen MB.C.11683 from Heegermühle (Brandenburg), illustrated by Remelé (1890: pl. 3 fig. 3). C. Specimen MB.C.11681 from Eberswalde (Brandenburg), illustrated by Remelé (1890: pl. 1 fig. 5). Scale bar units = 1 mm.
Fig. 20. Ancistroceras barrandei Dewitz, 1880 in Taxonomy and ontogeny of the Lituitida (Cephalopoda) from Orthoceratite Limestone erratics (Middle Ordovician)
Fig. 20. Ancistroceras barrandei Dewitz, 1880, reproduction of the figure provided by Noetling (1884: pl. 16 Fig. 6–6a). Scale bar units = 1 mm.
Fig. 21. Ancistroceras barrandei Dewitz, 1880 from the Upper Grey Orthoceratite Limestone. A in Taxonomy and ontogeny of the Lituitida (Cephalopoda) from Orthoceratite Limestone erratics (Middle Ordovician)
Fig. 21. Ancistroceras barrandei Dewitz, 1880 from the Upper Grey Orthoceratite Limestone. A. Specimen MB.C.30518 (Neben & Krueger Coll.) from Rerik (Ostsee); previously figured by Neben & Krueger (1971: pl. 17 fig. 1). B. Specimen MB.C.30516 (Neben & Krueger Coll.) from Rerik (Ostsee). C. Specimen MB.C.11991 (Helms 1966 Coll.) from Gross Zicker (Island of Rügen). Scale bar units = 1 mm.
Fig. 15 in Taxonomy and ontogeny of the Lituitida (Cephalopoda) from Orthoceratite Limestone erratics (Middle Ordovician)
Fig. 15. Species of Rhynchorthoceras from the Upper Red Orthoceratite Limestone.A. Rhynchorthoceras rugium sp. nov., holotype MB.C.11728 (Hoffmann & Gager 1972 Coll.) from Mönchgut (Island of Rügen); lateral, dorsal and ventral views. B. Rhynchorthoceras kranepuhlense sp. nov., holotype MB.C.11730 (Kummerow Coll.) from Kranepuhl (Brandenburg); ventral, lateral and dorsal views. Scale bar units = 1 mm.
Text-fig. 4. Palaeogeographical reconstruction of the Katian (after Popov et al. 2011, modified) showing geographical distribution of the Middle and Late Ordovician craniides and craniopsides. White arrow = Boda Event expansion of craniiates and craniopsides to Perunica; black arrow = Hirnantian low-latitude expansion of the Hirnantia Fauna. in Lingulate And Craniate Brachiopods From The Top Of The Králův Dvůr Formation (Latest Katian) And Their Contribution To Palaeogeography
Text-fig. 4. Palaeogeographical reconstruction of the Katian (after Popov et al. 2011, modified) showing geographical distribution of the Middle and Late Ordovician craniides and craniopsides. White arrow = Boda Event expansion of craniiates and craniopsides to Perunica; black arrow = Hirnantian low-latitude expansion of the Hirnantia Fauna.
Figure 20. A–E in Middle to Late Ordovician (Darriwilian-Sandbian) Conodonts from the Dawangou Section, Kalpin Area of the Tarim Basin, Northwestern China
Figure 20. A–E, Protopanderodus cooperi (Sweet & Bergström, 1962), from the Pratt Ferry Formation of Alabama. A–C, M element, OSU 52802, from the topotype locality, A–B, posterior views (IY170-024, IY170-025), C, anterior view (IY171-011). D–E, Sb element, OSU 52803, from the topotype locality, D, outer lateral view (IY171-012), E, inner lateral view (IY170-023). F–L, Protopanderodus varicostatus (Sweet & Bergström, 1962); from the Pratt Ferry Formation of Alabama. F–H, M2 element, OSU 52804, topotype, sample 64B2-12 from the top bed of the formation, F–G, posterior views (IY170-002, Iy170-001), F, anterior view (IY171-015); I–J, M2 element, OSU 52805 from the topotype locality, I, posterior view (IY170-007), J, anterior view (IY171-018). K–L, M1 element, OSU 52806, topotype, sample 64B2-12 from the top bed of the formation, K, posterior view (170-026), L, anterior view (IY171-013). Scale bars 100 µm.
PLATE 2 in Middle Ordovician (Darriwilian) cheirurid trilobites from the Table Cove Formation, western Newfoundland, Canada
PLATE 2
PLATE 10 in Middle Ordovician (Darriwilian) cheirurid trilobites from the Table Cove Formation, western Newfoundland, Canada
PLATE 10
PLATE 1 in Middle Ordovician (Darriwilian) cheirurid trilobites from the Table Cove Formation, western Newfoundland, Canada
PLATE 1
PLATE 5 in Middle Ordovician (Darriwilian) cheirurid trilobites from the Table Cove Formation, western Newfoundland, Canada
PLATE 5
PLATE 13 in Middle Ordovician (Darriwilian) cheirurid trilobites from the Table Cove Formation, western Newfoundland, Canada
PLATE 13
PLATE 11 in Middle Ordovician (Darriwilian) cheirurid trilobites from the Table Cove Formation, western Newfoundland, Canada
PLATE 11
PLATE 8 in Middle Ordovician (Darriwilian) cheirurid trilobites from the Table Cove Formation, western Newfoundland, Canada
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PLATE 3 in Middle Ordovician (Darriwilian) cheirurid trilobites from the Table Cove Formation, western Newfoundland, Canada
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PLATE 16 in Middle Ordovician (Darriwilian) cheirurid trilobites from the Table Cove Formation, western Newfoundland, Canada
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PLATE 6 in Middle Ordovician (Darriwilian) cheirurid trilobites from the Table Cove Formation, western Newfoundland, Canada
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PLATE 4 in Middle Ordovician (Darriwilian) cheirurid trilobites from the Table Cove Formation, western Newfoundland, Canada
PLATE 4
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Allen Brain Atlas
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International Brain Laboratory public data
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OpenNeuro
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