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Figure 17. Delectopecten kieli n in Paleogene marine bivalves of the deep-water Keasey Formation in Oregon, Part II: The pteriomorphs

Figure 17. Delectopecten kieli n. sp. A. Right valve exterior, Holotype, UCMP 110746. B. Right valve exterior, Paratype, UCMP 110747. C. Left valve exterior, Paratype, UCMP 110748. D. Right valve exterior, Paratype UCMP 110749. Scale bars=1 mm. E. Detail of camptonectes sculpture on B, with reticulations and splitting of fine radial ribs (white circles). Scale bar=0.5 mm.

Figure 5 in Paleogene marine bivalves of the deep-water Keasey Formation in Oregon, Part II: The pteriomorphs

Figure 5. Porterius gabbi (Dickerson, 1917), Keasey Formation. A, B. Exterior and Interior of right valve, hypotype USNM 561838, scale bar=1 cm. C. Detail of cardinal area and hinge plate of B, scale bar=1 mm. D. Interior of left valve interior in matrix, hypotype UCMP 110736, scale bar=1 cm. E–H. Interior and exterior of left valve, hypotype UCMP 110737, with detail views of hinge tooth striations (G) and interior shell lines (H), scale bar=1 cm.

Figure 20 in Paleogene marine bivalves of the deep-water Keasey Formation in Oregon, Part II: The pteriomorphs

Figure 20. Variation in shell morphology in living North Pacific Propeamussiidae. A, B. Right and left valves of Propeamussium jeffreysi (E.A. Smith, 1885), SBMNH 126833. C, D. Right and left valves of Cyclopecten davidsoni (Dall, 1898), SBMNH 123955. E, F. Right and left valves of Parvamussium alaskense (Dall, 1871), SBMNH 103661. Scale bars=1 cm.

Figure 4. A in Paleogene marine bivalves of the deep-water Keasey Formation in Oregon, Part II: The pteriomorphs

Figure 4. A. Crenella porterensis detail of coarser ribs and rib increase by splitting (yellow arrow) and by intercalation (black arrows) (enlarged from Fig. 3A). B. Crenella washingtonensis detail of finer ribs and rib increase by intercalation (black arrows) (comparable enlargement from Fig. 3D).

Figure 16 in Paleogene marine bivalves of the deep-water Keasey Formation in Oregon, Part II: The pteriomorphs

Figure 16. Delectopecten vancouverensis (Whiteaves, 1893), North Pacific live-collected, articulated representative of the type species of Delectopecten. SBMNH 130085. A. Left valve. B. Right valve. C. Enlargement of byssal notch with ctenolium (yellow circle). Scale bars=1 mm.

Figure 14 in A late Eocene wood assemblage from the Crooked River Basin, Oregon, USA

Figure 14. Urticales. Cannabaceae/Moraceae Wood Type 1. UF 278-87894. A, B. Wood diffuse-porous, vessels solitary and in radial multiples; marginal parenchyma, TS. C. Alternate intervessel pitting, polygonal in outline, simple perforation plates, ray with sheath cells, TLS. D. Vessel to parenchyma pits, similar in size to intervessel pitting with reduced borders, RLS. E. Rays predominantly multiseriate, 1-2-seriate rays rare, TLS. F. Ray body cells procumbent, marginal row of upright/square cells, RLS. Scale bars‒500 µm in A; 200 µm in B, E; 100 µm in F; 50 µm in C, D.

Figure 2 in The dentition of the extinct megamouth shark, (Lamniformes: Megachasmidae), from southern California, USA, based on geometric morphometrics

Figure 2. Homologous landmark (numbered black or white circles) and semi-homologous landmark (red circles with asterisk [*] connected by red lines) on tooth samples of Megachasma applegatei (A), M. pelagios (B), and Odontaspis ferox (C) for principal component analysis (not to scale). Seven homologous landmarks: 1, the crown apex, 2 and 3, right- and left-most extremities of the crown; 4, apical-most point around the middle of the crown base; 5 and 6, basal extremity of each of the two root lobes; and 7, apical-most point of the basal root concavity.

Figure 4 in A late Eocene wood assemblage from the Crooked River Basin, Oregon, USA

Figure 4. Magnoliaceae. Magnolia hansnooteboomii, UF 278-84871. A. Diffuse-porous wood, vessels predominantly in radial multiples, T.S. B, C. Scalariform perforation plates with fewer than 20 bars, helical thickenings in vessel elements, RLS. D. Scalariform intervessel pitting, TLS. E. Vessel-ray parenchyma pits with reduced borders, horizontally elongate in outline, RLS. F, G. Rays mostly 3‒4 cells wide, scalariform perforation plates, non-septate fibers, note scalariform intervessel pits in F and tyloses (T) in G, TLS. Scale bars=200 µm in A; 100 µm in G; 50 µm in B, E, F; 20 µm in C, D.

Figure 9 in A late Eocene wood assemblage from the Crooked River Basin, Oregon, USA

Figure 9. Fagaceae. Quercinium sp, UF 278-84878. A. Diffuse- to semi-ring-porous wood; vessels exclusively solitary, very slight tendency to diagonal arrangement, TS. B. Simple perforation plates (PP), RLS. C. Vasicentric tracheids, uniseriate rays, axial parenchyma strands, TLS. D. Vessel-ray parenchyma pits with reduced borders to simple, tyloses, RLS. E, F. Rays of two distinct sizes, TLS. Scale bars=200 µm in A, E; 100 µm in B, C, F; 50 µm in C; 20 µm in D.

Figure 3. A in The dentition of the extinct megamouth shark, (Lamniformes: Megachasmidae), from southern California, USA, based on geometric morphometrics

Figure 3. A. Scatter plot diagram showing principal component analysis of 207 teeth of Megachasma applegatei (black plots) compared with all 178 teeth of extant M. pelagios (red plots), and all 78 teeth of extant Odontaspis ferox separated into tooth types using different colors (symphysial teeth = green; anterior teeth = dark blue; intermediate teeth = purple; lateral teeth = brown). B. Scatter plot diagram exclusively of M. applegatei, showing examples of actual specimens (not to scale) represented by certain plots (illustrated teeth: LACM 9883, 150907, 155340, 155348, 155357, 155373, 155393, 155424, 155434, 155456, 155563, 155622, 155630, 155651, 155653, 155694, and 155700). C. Scatter plot diagram exclusively of M. pelagios, showing examples of actual specimens (not to scale: see Fig. 1C, D) represented by certain plots. D. Scatter plot diagram exclusively of O. ferox, showing examples of actual specimens (not to scale: see Fig. 1F) represented by certain plots. Asterisk (*): on axes in B and C = PC1 and PC2 originally labeled inversely by the software (see text for detail); by photograph of teeth in C-D = Upper teeth.

Figure 3 in A late Eocene wood assemblage from the Crooked River Basin, Oregon, USA

Figure 3. Cupressaceae. Taxodioxylon sp. A, C, E–I. UF 278-84886. B, D. UF 278-84889. A, B. Narrow latewood zone, axial parenchyma diffuse and in short tangential lines, TS. C. Latewood with compression wood, TS. D, E. Uniseriate rays, TLS. F. End walls of axial parenchyma smooth, TLS. G. Circular bordered pits on radial walls of longitudinal tracheids, occasionally biseriate; most rays homocellular composed of ray parenchyma, bottom ray with top marginal row possibly composed of ray tracheids (RT) RLS. H. Ray composed of ray parenchyma, horizontal and end walls smooth, RLS. I. Taxodioid cross-field pits, RLS. Scale bars=200 µm in A, B; 100 µm in C, D, E, G; 50 µm in F, H; 20 µm in I.

Figure 1. A in The dentition of the extinct megamouth shark, (Lamniformes: Megachasmidae), from southern California, USA, based on geometric morphometrics

Figure 1. A. Generalized consensus tree of extant lamniform families on the basis of molecular-based phylogenetic studies, highlighting Megachasmidae in bold (see Stone and Shimada 2019, fig. 6, and references therein). B. Extant megamouth shark, Megachasma pelagios (after Compagno 1984). C, D. Right upper (C) and right lower (D) teeth of extant M. pelagios (BPBM 22730, 446 cm TL, male) in (from top row to bottom row) lingual, labial, mesial, apical, and basal views, showing strong tendency towards homodonty. E. Extant smalltooth sand tiger, Odontaspis ferox (after Compagno 1984). F. Left upper and left lower dental series of extant O. ferox (BPBM 9335, 297(?) cm TL, male(?)) showing representative 'lamnoid tooth pattern' (A or a = anterior teeth; I or i = intermediate tooth; L or l = lateral tooth; S or s = symphysial tooth). Scale bars: B and E = 50 cm; C, D, F = 5 mm

Figures 4-13 in Nucella demouthae, A New Species of Late Miocene Muricid Gastropod From Northern California, U.S.A.

Figures 4-13. Nucella demouthae Powell, Roth, and Garcia n. sp., paratypes. Mature specimens: 4, 5. CASG 78594, height 43.6 mm, width 24.5 mm (incomplete specimen). 4. Adapertural view, 5. Apertural view. 6, 7. CASG 78595, height 36.0 mm, width 25.2 mm. Immature specimens: 6. Adapertural view, 7. Apertural view. 8. 9. CASG 78596, height 32.1 mm, width 18.9 mm. 8. Adapertural view, 9. Apertural view. 10, 11. CASG 78597, height 29.8 mm, 17.5 mm. CASG 78598, 19.2 mm, width 11.8 mm. 10. Adapertural view, 11, Apertural view. 12, 13. CASG 78599, height 13.1 mm, width 8.8 mm. 12. Adapertural view, 13. Apertural view. Note that immature specimens do not have a flared lip.

Figure 6. Platanaceae. Platanoxylon haydenii. A, B in A late Eocene wood assemblage from the Crooked River Basin, Oregon, USA

Figure 6. Platanaceae. Platanoxylon haydenii. A, B. Diffuse-porous wood, vessels mostly solitary, a few tangential multiples; diffuse and diffuse-in-aggregates axial parenchyma; fiber walls of medium thickness, TS, UF 278-84881(A), UF 278-84874 (B). C. Scalariform perforation plates, UF 278-84874, RLS. D. Opposite intervessel pitting, UF 278-84874, TLS. E. Wide (>10-seriate) and tall (>1 mm) rays, UF 278-.84874, TLS. F. Rays composed predominantly of procumbent cells, UF 278-84879, RLS. Scale bars=500 µm in E; 200 µm in A; 100 µm in B, F; 50 µm in C, D.

Figure 4 in The dentition of the extinct megamouth shark, (Lamniformes: Megachasmidae), from southern California, USA, based on geometric morphometrics

Figure 4. Three reconstructed dentitions of Megachasma applegatei under three different assumptions (see text for detail). A. Artificial dentition based on Odontaspis ferox as a model. B. Artificial dentition depicted as intermediate between O. ferox and M. pelagios. C. Artificial dentition based on M. pelagios as a model. Scale bar = 5 mm (note: each scale bar applies to each respective dentition consisting of teeth with digitally adjusted sizes [see text]).

Figure 7 in A late Eocene wood assemblage from the Crooked River Basin, Oregon, USA

Figure 7. Caption on pg, 15 Figure 7. Fabaceae. cf. Styphonolobium sp., UF 278-84867. A. Ring-porous wood, with distinct earlywood zone 2‒3 vessels deep, confluent-banded axial parenchyma, TS. B. Pith and first formed secondary xylem, first formed growth ring not ring-porous, pith with thin-walled parenchyma cells, TS. C. Earlywood vessels mostly solitary, one radial pair; latewood vessels in small multiples, confluent parenchyma, TS. D. Crowded alternate pits, TLS. E. Vessel-ray parenchyma pits similar to intervessel pits, RLS. F. Multiseriate rays; axial parenchyma strands of 2‒4 cells, TLS. G. Multiseriate rays; non-septate fibers, TLS. H. Simple perforation plate in narrow vessel element; heterocellular rays with procumbent and square cells, RLS. I. Pith (at right) with thin-walled parenchyma cells, upright cells common in rays nearest to pith (at left), RLS. Scale bars=500 µm in A; 200 µm in B, I; 100 µm in C, F; 50 µm in G, H; 20 µm in D, E.

Figure 1. A in A late Eocene wood assemblage from the Crooked River Basin, Oregon, USA

Figure 1. A. Oblique northerly view of Dietz Hill, site UF278. White tuff capping the hill yielded radiometric age of 36.21±0.26 Ma (n=26) (Manchester and McIntosh 2007). Woods and fruits and seeds derive from the same tuff. Google Earth imagery. B. Index map of Oregon. Yellow rectangle showing the location of satellite image in C. C. Paleobotanical localities in the vicinity of Post, Oregon, in the Crooked River valley. Yellow line marks the approximate contact between the Clarno Formation (Tc) and overlying John Day Formation (Tjd) based on the geologic mapping of Waters (1968). Quaternary deposits in the Crooked River floodplain and localized Plio-Pleistocene igneous intrusions not shown (see Waters 1968 for detail). Late Eocene localities: UF279 Post Hammer site; UF278 Dietz Hill (subject of this treatment), UF254 Brummers Spring, UF256 Teater Road leaf locality. Early Oligocene locality: UF258. Crooked River leaf site (Chaney 1927, Meyer and Manchester 1997).

Figure 12 in A late Eocene wood assemblage from the Crooked River Basin, Oregon, USA

Figure 12. Urticales. cf. Moroxylon sp., UF 278-84899. A‒C. Ring-porous wood, with distinct earlywood zone 1‒2 vessels deep, latewood vessels solitary and in radial multiples in a diagonal pattern, TS. D. Crowded alternate pits, axial parenchyma strands of 2‒4 cells. TLS. E. Vessel elements with inclined end walls, rays predominantly 3-seriate, axial parenchyma strands of 2‒3 cells, TLS. F. Simple perforation plates, crowded alternate intervessel pits, vessel-parenchyma pits of similar size to intervessel pits; ray parenchyma cells square and weakly procumbent, RLS. Scale bars=500 µm in A; 200 µm in B; 100 µm in C, E; 50 µm in D, F.

Figure 2 in A late Eocene wood assemblage from the Crooked River Basin, Oregon, USA

Figure 2. Pinaceae. Keteleeria farjonii, UF 278-84891. A‒C. Distinct growth rings, gradual transition from earlywood to latewood, traumatic resin canals, TS. D. Uniseriate rays, TLS. E, F. Intertracheary pitting mostly uniseriate, rays composed of ray parenchyma cells, RLS. G. Mostly two pits per cross-field, difficult to determine if taxodioid or cupressoid; n to left of nodular end wall; p above pitted horizontal walls, RLS. Scale bars=500 µm in A; 200 µm in B; 100 µm in C, D; E; 50 µm in F; 20 µm in G.

Figure 11. Ulmaceae. Ulmus woodii. A in A late Eocene wood assemblage from the Crooked River Basin, Oregon, USA

Figure 11. Ulmaceae. Ulmus woodii. A. Pith composed of isodiameteric parenchymatous cells, first ring of wood with vessels mostly solitary and in radial alignment, TS, UF 278-84883. B. Rings 2 and 3 semi-ring-porous, TS, UF 278-84883. C. Outermost rings of the sample, latewood vessels in radial multiples and clusters in a ulmiform pattern, UF 278-84866. D‒F. Rays composed of procumbent cells, crowded alternate intervessel pits (IVP), vessel-ray parenchyma pits (VRP) of similar size to intervessel pits, crystalliferous axial parenchyma strands (C), RLS, UF 278-62702. E. Ray mostly 3‒5-seriate, uniseriate rays rare, TLS. F. Multiseriate rays, and crystalliferous axial parenchyma strands (C), TLS. Scale bars=200 µm in A–C; 100 µm in E; 50 µm in D, F.