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Figure 3. Acanthodian fin spines and scapulocoracoid. A-C in Acanthodian fauna from the Early Devonian (Emsian) of Death Valley, California
Figure 3. Acanthodian fin spines and scapulocoracoid. A-C, Bryantonchus peracutus: A, B complete spine FMNH-PF14564; C, proximal end of spine FMNH-PF14568. D, E, Machaeracanthus sp.: D, incomplete spine FMNH-PF14573, lateral view; E, abraded spine FMNH-PF14574, dorsoventrally compressed. F-H, acanthodian indet. scapulocoracoid: F, counterpart FMNH-PF14575; G, part FMNH-PF14576; H, outline sketch. Abbreviations: IEB, insertion-exsertion boundary; k/w, worn keel or wing; plac, placoderm plate; le, leading edge; te, trailing edge; teg, trailing edge groove. Scale bars=0.5 mm in A, C–E, 0.1 mm in B, F–H.
Figure 1 in Paleogene marine bivalves of the deep-water Keasey Formation in Oregon, Part II: The pteriomorphs
Figure 1. Type species of Crenella, C. decussata (Motagu,1808). A. Left valve exterior of double-valved specimen with byssal threads cemented to shell fragments. B. Right valve interior. SBMNH 214640. Scale bar=1 mm.
Figure 1 in First Cretaceous teleostean otolith assemblage (Arkadelphia Formation, upper Maastrichtian) from Arkansas, USA, early Gadiformes, and the Western Interior Seaway
Figure 1. Stratigraphy of the Arkadelphia Formation and other formations discussed in the text based primarily on McFarland (2004). The gray-shaded area represents an unconformity.
Figures 1–4 in A new fossil Euspira? (Mollusca: Gastropoda: Naticidae) from the Gubik Formation on the North Slope of Arctic Alaska
Figures 1–4. Euspira? louiemarincovichi n. sp. UCMP holotype 123663, UCMP locality IP23235 (USGS M7346). Bar = 1 cm. 1. Aperical view, 2. Apical view, 3. Umbilical view, 4. Inclined side view. Photographs by Dave Strauss, UCMP.
Figure 5 in A new fossil Euspira? (Mollusca: Gastropoda: Naticidae) from the Gubik Formation on the North Slope of Arctic Alaska
Figure 5. Close–up of spiral and radial sculpture on the body whorl of the holotype specimen. Field of view approximately 0.5 cm. Blue arrow indicates radial sculpture, red arrow indicates spiral sculpture. angle of the aperture is acute and points towards the apex. A deep, partially open umbilicus is present, but is obscured in part by the umbilical callus making it tear– drop shaped.
Figure 9 in Paleogene marine bivalves of the deep-water Keasey Formation in Oregon, Part II: The pteriomorphs
Figure 9. Comparison of dorsal slope angles in Juvenile and adult shells of Glycymeris andersoni Dickerson (1917) and Glycymeris winlockensis Effinger (1938), Gries Ranch Formation. A. Adult G. andersoni hypotype UCMP 110732, scale bar=1 cm. B. Adult G. winlockensis hypotype UCMP 110734, scale bar=1 cm. C. Juvenile G. andersoni hypotype UCMP 110733, scale bar=5 mm. D. Juvenile G. winlockensis hypotype UCMP 110735, scale bar=5 mm.
Figure 21 in A late Eocene wood assemblage from the Crooked River Basin, Oregon, USA
Figure 21. Incertae Sedis. cf. Hamamelidoxylon sp., UF 278-84876. A, B. Wood diffuse-porous, vessels solitary, angular in outline, TS. C, D. Scalariform perforation plates, RLS. E. Transitional intervessel pitting,,scalariform to opposite, TLS. F. Vessel-ray parenchyma (VRP) pits horizontally elongate, RLS. G. Ray cellular composition, intermixed square, upright, and barely procumbent cells. H. Rays exclusively uniseriate, T next to beginning of tyloses formation, TLS. Scale bars=200 µm in A; 100 µm B, H; 50 µm in C; D, G; 20 µm in E, F.
Figure 19 in A late Eocene wood assemblage from the Crooked River Basin, Oregon, USA
Figure 19. Araliaceae. Plerandreoxylon oskolski sp. nov., UF 278-84906. A. Semi-ring-porous wood with latewood vessels arranged in wavy tangential bands/diagonal arrangement, vessel clusters in latest latewood, axial parenchyma rare, T.S. B. Semi-ring-porous wood, vessels solitary and in short radial multiples, axial parenchyma rare, TS. C. Simple perforation plates, rays with procumbent body cells, RLS. D. Crowded alternate intervessel pitting, TLS. E. Vessel-ray parenchyma pits with reduced borders, oval to slightly horizontally elongate in outline, tyloses, RLS. F. Rays 5-6 cells wide, septate fibers, TLS. G. Rays predominantly multiseriate, TLS. Scale bars: 200 µm in A, B, G; 100 µm in C, F. 50 µm in E; 20 µm in D.
Figure 9 in First Cretaceous teleostean otolith assemblage (Arkadelphia Formation, upper Maastrichtian) from Arkansas, USA, early Gadiformes, and the Western Interior Seaway
Figure 9. Maastrichtian otolith localities in North America and otolith-based faunal communities (bioprovinces) based on Schwarzhans and Stringer (2020a). The Western Interior Seaway community is outlined in green, and the localities are shown in green circles. The Appalachian community is outlined in red, and the localities are shown in red circles. The number in the circle is the number of species known from the localities. The white star is the Arkadelphia Formation site at Cabot, Arkansas, and the focus of this study. The base paleogeographic map was modified from Blakey (2014) and Scotese (2014).
Figure 8 in Paleogene marine bivalves of the deep-water Keasey Formation in Oregon, Part II: The pteriomorphs
Figure 8. Glycymeris andersoni Dickerson (1917), Gries Ranch Formation. A. Interior of right valve, hypotype UCMP 110730. B, C. Exterior and interior of right valve, hypotype UCMP 110729. D, E. Ventral and do2rsal of articulated valves, hypotype UCMP 110731. Scale bars=1 cm.
Figure 3 in Paleogene marine bivalves of the deep-water Keasey Formation in Oregon, Part II: The pteriomorphs
Figure 3. Crenella porterensis Weaver (1912) (A–C, E) and C. washingtonensis Weaver (1916) (D, F). A. Articulated, left valve, hypotype UCMP 32410, Lincoln Creek Formation, height 18.2 mm. B. articulated, hypotype USNM 561803, Keasey Formation, height 13.5 mm. C. Exterior mold in matrix, hypotype UCMP 110725, Keasey Formation, height 10.8 mm. D. Right valve, hypotype UCMP 32250, Blakeley Formation, height 12.5 mm. E. Partial shell exterior in matrix, hypotype UCMP 110726, Keasey Formation, height 10.3 mm. F. Partial shell exterior in matrix, hypotype 110727, Keasey Formation, height 5.4 mm.
Figure 7 in Paleogene marine bivalves of the deep-water Keasey Formation in Oregon, Part II: The pteriomorphs
Figure 7. Porterius woodfordi (Hanna, 1927), Ardath Shale, paratype UCMP 31063. A. Exterior of with numerous very fine radial ribs, scale bar=1 cm B. previously unfigured cardinal area and hingeplate, scale bar=1 mm.
Figure 6 in First Cretaceous teleostean otolith assemblage (Arkadelphia Formation, upper Maastrichtian) from Arkansas, USA, early Gadiformes, and the Western Interior Seaway
Figure 6. Otoliths from the Cretaceous Arkadelphia Formation. All specimens unless otherwise noted are inner views of right sagittae. Length in mm. A. Kokenichthys navis Schwarzhans and Stringer (2020b), DMNH 2021-09-9, 4.10 mm. B. Clupeiform? indeterminate DMNH 2021-09-10, 1.42 mm. C. Arius subtilis Schwarzhans and Bratishko (2011), DMNH 2021-09-11, 4.61 mm. D. Vorhisia vulpes Frizzell (1965b), DMNH 2021-09-13, 2.49 mm. E. Vorhisia vulpes Frizzell (1965b), DMNH 2021-09-14, 3.06 mm. F. Vorhisia vulpes Frizzell (1965b), DMNH 2021-09-15, 3.99 mm. G. Vorhisia vulpes Frizzell (1965b), DMNH 2021-09-16, 7.98 mm. H. Vorhisia vulpes Frizzell (1965b), DMNH 2021-09-12, 19.36 mm.
Figure 2 in Paleogene marine bivalves of the deep-water Keasey Formation in Oregon, Part II: The pteriomorphs
Figure 2. Alternative reconstructions of the life habit of Crenella decussata. A. Completely encased in crypt of cemented sedimentary grains, living below sediment-water interface in North Atlantic. B, C. Byssus attached to shell fragments, living at sedimentwater interface in North Pacific.
Figure 18. Delectopecten kieli n in Paleogene marine bivalves of the deep-water Keasey Formation in Oregon, Part II: The pteriomorphs
Figure 18. Delectopecten kieli n. sp. Low voltage scanning Electron Micrographs. A. Right valve exterior, Paratype, UCMP 110750. B. Right valve exterior, Paratype, UCMP 110751. C. Right valve exterior UMMP 110752. D. Right valve exterior, Paratype UCMP 110753. E. Left valve exterior, Paratype, UCMP 110754. F. Left valve exterior, Paratype UCMP 110755. G. Right valve interior, Paratype UCMP 110756. H. Right valve interior, Holotype, UCMP 110746. I. Right valve interior, Paratype UCMP 110757. J. Articulated, left valve exterior rotated within right valve interior, Paratype UCMP 110758. K. Detail of sculpture on J. L. Articulated, left valve exterior displaced on top of right valve interior, Paratype UCMP 110759. Range of shell lengths: 2.2–3.2 mm.
Figure 13 in Paleogene marine bivalves of the deep-water Keasey Formation in Oregon, Part II: The pteriomorphs
Figure 13. Bathyisognomon smithwickensis? Right valve exterior, left valve exterior, and exterior view of ligament pits on large, incomplete specimen from Loc. LACM IP5806. Scale bar=5 cm.
Figure 12. Bathyisognomon smithwickensis n in Paleogene marine bivalves of the deep-water Keasey Formation in Oregon, Part II: The pteriomorphs
Figure 12. Bathyisognomon smithwickensis n. sp. A–C. Right valve exterior, left valve exterior, and exterior view of ligament pits, double-valved holotype, UCMP 110744. D–F. Right valve exterior, left valve exterior, and exterior view of ligament pits, double valved paratype, UCMP 110745. Scale bars=5 cm.
Figure 22 in Paleogene marine bivalves of the deep-water Keasey Formation in Oregon, Part II: The pteriomorphs
Figure 22. Propeamussium (Parvamussium) mistensis n. sp., uncoated latex casts of three paratypes. A. Left valve exterior, USNM 561853. B. Left valve exterior, USNM 561856. Right valve exterior, USNM 561850. Scale bars=3 mm.
Figure 21 in Paleogene marine bivalves of the deep-water Keasey Formation in Oregon, Part II: The pteriomorphs
Figure 21. Propeamussium (Parvamussium) mistensis n. sp., paired color images of molds in matrix and corresponding ammonium chloride-coated casts. A. Left valve exterior, holotype USNM 561849, length 8 mm. B. Left valve exterior, paratype USNM 561856, length 8.1 mm. C. Right valve exterior, paratype USNM 561850, length 5 mm. D. Right valve exterior on top of left valve, paratype USNM 561854, length 7 mm. E. Left valve interior, Paratype USNM 561852, length 6 mm.
Figure 11 in Paleogene marine bivalves of the deep-water Keasey Formation in Oregon, Part II: The pteriomorphs
Figure 11. Isognomon? sp. Fragment of nacreous isognomonid ligament area with narrow ligament pits and five shallowly concave interspaces. USNM 561801. Scale bar=1 cm.
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Allen Brain Atlas
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Annotated Behaviour and Observability Dataset (ABODe)
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