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178 results for “Spitsbergen”
FIGURE 10 in Gastropods from the Late Jurassic - Early Cretaceous seep deposits in Spitsbergen, Svalbard
FIGURE 10. List of gastropod taxa found in the Mesozoic seeps in Spitsbergen (open circles) and their stratigraphical ranges in deep-water chemosynthesis̄based associations (solid circles) and non-seep first occurrences (open rectangles). Solid ranges show taxa ranges in deep-water chemosynthesis̄based associations while dotted lines show shallow-water ranges. The taxa in bold occur typically in the chemosynthesis̄based associations. NZ, occurrence in moderately shallow-water seeps in Novaya Zemlya (Hryniewicz et al. 2015b). T, Report of a Hikidea-like gastropod in a seep in Turkey (Kiel et al. 2017). Note several first occurrences in Spitsbergen seeps.
FIGURE 8. A–C in Gastropods from the Late Jurassic - Early Cretaceous seep deposits in Spitsbergen, Svalbard
FIGURE 8. A–C. Cretadmete sp., (PMO 224.762), Seep deposit #8, Sassenfjorden, Svalbard; Late Tithonian (late Jurassic). D. Gastropoda gen. et sp. indet. (PMO 217.517), Seep deposit #2, Sassenfjorden, Svalbard; late Berriasian (Early Cretaceous).
FIGURE 9 in Gastropods from the Late Jurassic - Early Cretaceous seep deposits in Spitsbergen, Svalbard
FIGURE 9. Hyalogyrina knorringfjelletensis sp. nov. Sassenfjorden, Svalbard; late Berriasian (Early Cretaceous). A, F. PMO 217.508, Seep deposit #12. B, H, I. Paratype (PMO 217.510), Seep deposit #12. C, D, E, J. Holotype (PMO 217.511a), Seep deposit #12. G. Juvenile (PMO 224.763), Seep deposit #9.
FIGURE 7 in Gastropods from the Late Jurassic - Early Cretaceous seep deposits in Spitsbergen, Svalbard
FIGURE 7. Sassenfjordia sassenfjordensis sp. nov., holotype (PMO 217.512), Seep deposit #9, Sassenfjorden, Svalbard; late Berriasian (Early Cretaceous).
FIGURE 6. A–D in Gastropods from the Late Jurassic - Early Cretaceous seep deposits in Spitsbergen, Svalbard
FIGURE 6. A–D. Abyssomelania sp. (PMO 224.758), Seep deposit #3, Sassenfjorden, Svalbard; late Tithonian (Late Jurassic). E–I.?Hokkaidoconcha sp., Seep deposit #3; late Tithonian (Late Jurassic). E. PMO 224.759. F, G. PMO 224.760. H, I. PMO 224.761.
FIGURE 5. A–H in Gastropods from the Late Jurassic - Early Cretaceous seep deposits in Spitsbergen, Svalbard
FIGURE 5. A–H. Hudlestoniella hammeri sp. nov. Seep deposit #9, Sassenfjorden, Svalbard; late Berriasian (Early Cretaceous). A, B, F. Holotype (PMO 224.754). C, G, H. Paratype (PMO224.755). D. PMO 224.756. E. PMO 224.757. I–M. Hokkaidoconcha sp. Seep deposit #12, Sassenfjorden, Svalbard; late Berriasian (Early Cretaceous). I. PMO 217.509. J, L. PMO 217.511b. K, M. PMO 217.507.
FIGURE 4 in Gastropods from the Late Jurassic - Early Cretaceous seep deposits in Spitsbergen, Svalbard
FIGURE 4. Eucycloidea bitneri sp. nov. Sassenfjorden, Svalbard. A–C. Holotype (PMO 217.235), Seep deposit #3; late Tithonian (Late Jurassic). D. Juvenile (PMO 224.753), Seep deposit #9; late Berriasian (Early Cretaceous).
FIGURE 3. A–C in Gastropods from the Late Jurassic - Early Cretaceous seep deposits in Spitsbergen, Svalbard
FIGURE 3. A–C. Hikidea svalbardensis sp. nov. Seep deposit #9, Sassenfjorden, Svalbard; late Berriasian (Early Cretaceous); holotype (PMO 217.574). D–H.?Pectinodonta borealis sp. nov. Seep deposit #9, Sassenfjorden, Svalbard; late Berriasian (Early Cretaceous). D, E, G. Holotype (PMO 217.516). F, H. Internal mould (PMO 224.752).
FIGURE 1 in Gastropods from the Late Jurassic - Early Cretaceous seep deposits in Spitsbergen, Svalbard
FIGURE 1. Map showing the location of gastropod-bearing hydrocarbon-seeps sites in Sassenfjorden area, Spitsbergen, Svalbard. Modified from Dallmann et al. (2001) and Hryniewicz et al. (2015a).
FIGURES 27–32 in Achnanthidium petuniabuktianum sp. nov. (Achnanthidiaceae, Bacillariophyta), a new representative of the A. pyrenaicum group from Spitsbergen (Svalbard Archipelago, High Arctic)
FIGURES 27–32. Achnanthidium petuniabuktianum sp. nov. Light and scanning electron micrographs. All pictures taken from the type population (BR-4177). 27–28. SEM external views of an entire rapheless valve. 29. SEM internal view of an entire rapheless valve. 30. SEM detail of an external rapheless valve. 31. SEM detail of an internal rapheless valve. 32. SEM view showing a frustule in girdle view. Scale bars always 10 μm, except Figs 30–31 where scale bar is 1 μm.
FIGURES 2–26 in Achnanthidium petuniabuktianum sp. nov. (Achnanthidiaceae, Bacillariophyta), a new representative of the A. pyrenaicum group from Spitsbergen (Svalbard Archipelago, High Arctic)
FIGURES 2–26. Achnanthidium petuniabuktianum sp. nov. Light and scanning electron micrographs. All pictures taken from the type population (BR-4177). 1. LM view of a frustule in girdle view. 3–11. LM views of raphe valves. 12–19. LM views of rapheless valves. 20–22. SEM external views of an entire raphe valve. 23. SEM detail of the distal raphe ending of a raphe valve. 24. SEM detail of the internal raphe valve. 25–26. SEM internal views of an entire raphe valve. Scale bars always 10 μm, except Figs 23–24 where scale bar is 1 μm and Fig. 25 where scale bar is 5 μm.
FIGURE 16 in Bivalves from the latest Jurassic-earliest Cretaceous hydrocarbon seep carbonates from central Spitsbergen, Svalbard
FIGURE 16. (A–G) Cretaxinus hurumi gen. et sp. nov. (A) Lateral view of left valve of articulated internal mould, showing a distinct, triangular shape. (B–C) Anterior views showing shape and size of lunule and anterior pedal retractor scar. (D) Dorsal view showing shape of the posterodorsal margin. (E–F) Cardinal and posterodorsal portion of left valve internal mould shell showing posterior adductor muscle scar with distinct notch on anteroventral margin and posterior pedal retractor scar. (G) Silicone rubber cast of (E–F) showing small and elongated groove, possibly ligament groove. (H–P) Pseudotrapezium aff. groenlandicum (Spath, 1936). (H) Lateral view of the shell showing the outline and carina. (I–J) Anterior and posterior views of articulated specimen with most of the shell preserved. (K) Dorsal view showing flattened posterior area, two carinae and very thin shell. (L–M) Anterior view of articulated specimen with some preserved shell, showing deep and small lunule and rounded anterior adductor muscle scar. (N–O) Oblique posterior view showing weak pallial line and weakly impressed posterior adductor muscle scar. (P) Right valve dentition and large hinge plate. (A–D) PMO 217.540, (E–G) PMO 217.175, (H–K) PMO 226.632, (L–M) PMO 226.633, (N–O) PMO 226.635, (P) JUE no. 15926. Scale bars 10 mm (A–G), 5 mm (H–P).
FIGURE 7 in Bivalves from the latest Jurassic-earliest Cretaceous hydrocarbon seep carbonates from central Spitsbergen, Svalbard
FIGURE 7. (A–F) Mesosaccella rogovi sp. nov. (A–B) Lateral view of a internal mould showing pallial line. Fragment of the shell shows concentric growth lines. (C) Dorsal view of specimen with partially preserved shell showing weak carina, escutcheon, unidentified muscle scars and ridges formed by growth line deflections. (D–E) Lateral view of right valve internal mould showing weak posterior adductor muscle scar and weak pallial line with very shallow pallial sinus. (F) Internal view of the right valve showing anterior and posterior dental rows and cardinal dentition. (G–P) Mesosaccella toddi sp. nov. (G–K) Left valve lateral views of articulated specimens. (J) Details of external ornament showing characteristic commarginal ridges and rosette-shaped ornament in interridge spaces (arrowed). (K) Holotype showing strong posterior carinae. (L–M) Anterior and posterior views of holotype. Note three carinae and escutcheon visible in the posterior view. (N) Dorsal view of holotype showing three carinae and their relation to wide and shallow escutcheon. (O) Internal view of the dorsal margin of articulated specimen showing cardinal-most teeth and unidentified muscle scars. (P) Lateral view of right valve internal mould showing relatively strong, circular anterior adductor muscle scar and elongated posterior adductor muscle scar, as well as strong pallial line with shallow pallial sinus. (A–E) PMO 217.371, (F) PMO 217.539, (G) PMO 217.609, (H) PMO 217.610, (I–J) PMO 217.616, (K–N) PMO 224.861, (O) PMO 225.031, (P) PMO 224.862. Scale bars 5 mm (A–F, K–P), 2 mm (G–I).
FIGURE 15 in Bivalves from the latest Jurassic-earliest Cretaceous hydrocarbon seep carbonates from central Spitsbergen, Svalbard
FIGURE 15. Cretaxinus hurumi gen. et sp. nov. (A) Lateral view of left valve of articulated internal mould, showing broadly rounded ventral margin. (B–C) Detail of anterior margin showing weak and descending anterior adductor muscle scar fading posteriorly and its serrated dorsal margin. (D) Anterior view showing shape and size of lunule. (E) Dorsal view showing shape of the posterodorsal margin and escutcheon. (F–G) Cross-section through a ligament showing its thickness. (H) Lateral view of left valve of articulated internal mould with less rounded margin than specimen shown in (A). (I–J) Detail of a anterior margin showing weak anterior adductor muscle scar fading posteriorly. (K–L) Anterior view showing shape and size of the lunule, anterior adductor and pedal retractor muscle scars. (M) Dorsal view showing shape of the posterodorsal margin and escutcheon. (N) Lateral view of right valve internal mould. (O–P) Detail of anterior margin showing very weak anterior adductor muscle scar visible only at its anteriormost portion. (A–G) PMO 225.128, (H–M) PMO 217.172, (N–P) PMO 225.136. Scale bars 10 mm.
FIGURE 10 in Bivalves from the latest Jurassic-earliest Cretaceous hydrocarbon seep carbonates from central Spitsbergen, Svalbard
FIGURE 10. (A–B) Pectinida gen. et. sp. indet. (A) Cross section of an articulated specimen. (B) Internal mould of the upper valve. Note possible adductor muscle scar and a line close to the dorsal margin, representing a possible dorsal furrow. (C–G) Oxytoma octavia (d'Orbigny, 1850). (C) Lateral view of a small left valve internal mould with fragments of the shell preserved showing weak radial ornament. (D) Enlarged view of anterodorsal portion area showing weak byssal notch. (E) Lateral view of a large left valve showing well developed radial ornament composed of primary and secondary ribs. (F) Lateral view of a right valve; lack of ornament is caused by shell delamination. Note very weak posterior sulcus and flattening of the valve. Probable shape of auricle is shown with dashed line (evidence from other partial specimens). (G) Plasticine cast of right valve external mould. Note radial ornament composed of primary and secondary ribs. (H–K) Camptonectes (Costicamptonectes) aff. milnelandensis Fürsich, 1982. (H–I) Right valve internal mould with shell partially preserved showing some divaricating ornament preserved close to the posterior shell margin. (J–K) External mould of right valve of a specimen from the Dorsoplanites bed, showing radial ribs close to the anterior shell margin and divaricating ornament preserved close to the posterior shell margin. (L–O) Camptonectes (Camptochlamys) clathratus (Roemer, 1836). (L–M) Lateral view of poorly preserved left valve showing cancellate external ornament in ventral margin. (N–O) Lateral view of a disarticulated and compressed shell from the Dorsoplanites bed showing cancellate ornament. Note distinct anterior auricle in the right valve. (P–R) Pseudolimea arctica (Zakharov, 1966). (P) Lateral view of left valve internal mould with some shell preserved around the ventral margin, with V-shaped ribs on the outer shell surface and corresponding rounded ribs on the internal mould. (Q) Lateral view of right valve, with anterior and posterior auricles and lack of secondary ribs caused by shell delamination. (R) Silicone rubber cast of small area of shell surface showing detail of external ornament, with large primary ribs and smaller secondary riblets in the interrib spaces. (A) PMO 226.609, (B) PMO 226.610, (C–D) PMO 217.562, (E) PMO 217.555, (F) PMO 217.214, (G) PMO 217.570, (H–I) PMO 226.606, (J–K) PMO 226.604, (L–M) PMO 226.605, (N–O) PMO 226.603, (P) PMO 217.194, (Q) PMO 217.353, (R) PMO 217.370. Scale bars 5 mm (A–I), 10 mm (J–R).
FIGURE 5 in Bivalves from the latest Jurassic-earliest Cretaceous hydrocarbon seep carbonates from central Spitsbergen, Svalbard
FIGURE 5. (A–N) Nucinella svalbardensis sp. nov. (A–D) Lateral views of holotype showing shape of the articulated internal mould, anterior adductor muscle scar and possible anterior pedal retractor scar, rounded posterior margin and fine radial striations on internal mould surface. (E) Dorsal view showing weakly opisthogyrate umbo and deep ligament pit on the posterodorsal margin. (F) Anterior view showing anterior adductor muscle scar projecting weakly beyond pallial line. (G) Lateral view showing commarginal ornament on external shell surface. (H–I) Dorsal view of partially articulated specimen showing length of the cardinal teeth and relation of the possible ligament to the cardinal dentition. (J–K) Lateral view of the cardinal part of the hinge plate showing arrangement and shape of the cardinal teeth. (L) Ventral view of silicone rubber cast of the dorsal margin of articulated internal mould showing sabre-shaped lateral teeth and interlocked cardinal teeth. (M–N) Silicone rubber casts of right valve internal moulds showing two lateral teeth. (O–Q) Dacromya chetaensis Sanin, 1976. (O–P) Lateral and dorsal views showing shape of internal mould, taxodont dentition, anterior and posterior adductor muscle scars. (Q) Posterodorsal shell margin showing weak growth lines. (R–T) Mesosaccella rogovi sp. nov. (R) Lateral view of holotype left valve shell surface showing characteristic growth-line deflections around the posterior margin and carina subparallel to the dorsal margin. (S–T) Lateral view of left valve internal mould showing anterior adductor muscle scar, weak posterior adductor muscle scar and pallial line. (A–F) PMO 217.171, (G) PMO 224.978, (H–I) PMO 225.042, (J–K) PMO 224.981, (L–M) PMO 217.217, (N) PMO 225.020, (O–P) PMO 217.581, (Q) PMO 226.600, (R) PMO 224.971, (S–T) PMO 217.229. Scale bars 5 mm.
FIGURE 3 in Bivalves from the latest Jurassic-earliest Cretaceous hydrocarbon seep carbonates from central Spitsbergen, Svalbard
FIGURE 3. Solemya (Petrasma) cf. woodwardiana Leckenby, 1859. (A–B) Lateral view of right valve and dorsal view of articulated specimen with shell preserved. (C–D) Lateral view of left vavle internal mould. Note weak anterior adductor muscle scar and very weak radial ornament. (E) Lateral view of right valve internal mould with shell partially preserved. Note strong radial ornament on the shell, weak on the mould, and posterior adductor muscle scar with buttress supporting the anterior side. (F–G) Lateral view of left vavle internal mould with some shell preserved in dorsal and anterior margins. Note posterior adductor muscle scar with buttress supporting its anterior side and dorsally bound by a chondrophore and weak growth lines on the posterior shell margin. (H–I) Silicone rubber cast of an internal mould showing shape of posterior adductor muscle scar and its relation to chondrophore and buttress. Note posterior adductor muscle scar surrounding the dorsal side of chondrophore and passing above the posterior end of the chondrophore. (J–K, M) Dorsal views of articulated internal moulds showing chondrophore and anterior adductor muscle scar. (L, N) Enlarged part of the dorsal margin showing ligament demipads. (A–B) PMO 224.956, (C–D, H–L) PMO 217.249, (E) PMO 217.260, (F–G) PMO 217.176, (M–N) PMO 217.245. Scale bars 5 mm.
FIGURE 13 in Bivalves from the latest Jurassic-earliest Cretaceous hydrocarbon seep carbonates from central Spitsbergen, Svalbard
FIGURE 13. (A–J) Tehamatea rasmusseni sp. nov. (A) Lateral view of holotype showing the vertical valve displacement. (B) Detail for interior of right valve showing cardinal dentition. Note long lunule, small 3a and long 3b. (C) Lateral view of exterior of right valve showing oval outline and ornament of dense commarginal growth lines. (D–E) Silicone rubber casts of right valve cardinal areas showing small 3a and large, thick 3b cardinal teeth. (F) Oblique lateral view of a right valve internal mould showing small anterior and posterior lateral teeth. (G) Lateral view right valve internal mould showing shapes and relative sizes of anterior and posterior adductor muscle scars and wavy pallial line below anterior adductor muscle scar, representing possible mantle lobe scars. (H) Silicone rubber cast of an articulated internal mould showing anterior adductor muscle scar and anterior lateral teeth. (I) Dorsal view of an articulated shell showing long external ligament, flattened posterior shell area and deep, lancet-shape, slightly asymmetric lunule. (J) Lateral view of a right valve internal mould showing bioimmuration trace. (K–N) Cretaxinus hurumi gen. et sp. nov. (K) Lateral view of articulated holotype left valve showing shell outline. Note very weakly sulcated posterodorsal margin extending only slightly above the shell outline. (L) Holotype anterior view showing large and deep lunule. (M–N) Holotype posterior and dorsal views respectively, showing external portion of the ligament, escutcheon and posterodorsal margin sulcation. (A–B) PMO 217.234, (C) PMO 217.169, (D) PMO 217.173, (E) PMO 217.243, (F) PMO 225.111, (G) PMO 225.104, (H) PMO 225.101, (I) PMO 217.227, (J) PMO 217.247, (K–N) PMO 217.277. Scale bars 10 mm.
FIGURE 1 in Taxonomy and biostratigraphy of Ordovician brachiopods from northeastern Ny Friesland, Spitsbergen 3076
FIGURE 1 Locality maps of the Svalbard Archipelago. a) Locations of sites yielding Lower Palaeozoic fossils mentioned in this paper. b) Geological map of the Basissletta plain, northeastern Ny Friesland; redrawn from Fortey & Bruton (1973). The base map is based on aerial photos made available by the Norwegian Polar Institute and on field observations made by the authors in 2008.
FIGURE 2 in Taxonomy and biostratigraphy of Ordovician brachiopods from northeastern Ny Friesland, Spitsbergen 3076
FIGURE 2 Stratigraphical ranges and diversity of brachiopod species at Basissletta, Spitsbergen, and relative sea levels and percentages of linguliform brachiopods in the total brachiopod fauna. White shading in the last graph indicates stratigraphical intervals without brachiopods. Thicknesses of units are according to Fortey & Bruton (1973). Lithological log and sea level curve are from Hansen & Holmer (2010).
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