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7 results for “Diplacanthus”
FIGURE 18. Diplacanthus tenuistriatus isolated shoulder girdle complexes. 1–4, NMS G.2014.15.21 in The diplacanthid fishes (Acanthodii, Diplacanthiformes, Diplacanthidae) from the Middle Devonian of Scotland
FIGURE 18. Diplacanthus tenuistriatus isolated shoulder girdle complexes. 1–4, NMS G.2014.15.21 from Marwick, Orkney: 1, external surface of scapulocoracoid, pectoral fin spine, pinnal plate and admedian spine; 2, admedian spine; 3, 4, scale-like ornament on pinnal plate; 5, NMS G.2014.15.22 from Marwick, Orkney, internal surface; 6–9, transverse sections of NMS G.2014.4.20 from Marwick, Orkney: 6, pinnal plate; 7, multiple odontode on plate; 8, scalelike ornament; 9, transverse section through pinnal plate, pectoral fin spine base, scapulocoracoid and perichondral bone sheet; 10, 11, NMS G.2014.4.27 from Flashes, Hoy, Orkney, transverse section through base of admedian spine and inner perichondral bone sheet; 10, whole width; 11, scale-like ornament in groove. Scale bars equal 1 cm in 1, 5; 5.0 mm in 2; 1.0 mm in 3, 4, 6; 0.5 mm in 9, 10; 0.1 mm in 7, 8, 11; 0.05 mm in 4.
FIGURE 16. Diplacanthus tenuistriatus fin spine histology. 1–4, pectoral spine NMS G.2014.7.36 in The diplacanthid fishes (Acanthodii, Diplacanthiformes, Diplacanthidae) from the Middle Devonian of Scotland
FIGURE 16. Diplacanthus tenuistriatus fin spine histology. 1–4, pectoral spine NMS G.2014.7.36 from Marwick, Orkney; 1–4, transverse section through the pectoral spine and the posterior end of the pinnal plate; 5, 6, anterior dorsal spine NMS G.2014.7.35 from Marwick Orkney: midspine transverse section. 7, NMS G.2014.33.1, midspine transverse section of anterior dorsal spine from North Ronaldsay, Orkney. Scale bars equal 1 mm in 1, 2, 5, 7; 0.1 mm in 3, 4, 6.
FIGURE 13. Diplacanthus tenuistriatus morphology. 1, NMS G.1897.55.2 in The diplacanthid fishes (Acanthodii, Diplacanthiformes, Diplacanthidae) from the Middle Devonian of Scotland
FIGURE 13. Diplacanthus tenuistriatus morphology. 1, NMS G.1897.55.2, counterpart of a headless large specimen from Achanarras Quarry, Caithness; 2, 3, NMS G.1897.55.1 (the part of NMS G.1897.55.2): 2, caudal fin, anal fin spine and fin web and right pelvic fin spine and fin web; 3, posterior dorsal fin spine and fin web; 4, NMS G.1870.14.144 from Tynet Burn, Moray, head and pectoral region. Scale bars equal 1 cm. Abbreviations: ad.fs=anterior dorsal fin spine; adm.s=admedian spine; ck.p=cheek plate; co.p=circumorbital plate; cor=coracoid; lt.sc=left scapula; lt.p.fs= left pectoral fin spine; oc=occlusal plate; p.p=pinnal plate; prepelv.s=prepelvic spines; rt.sc=right scapula.
FIGURE 14. Diplacanthus tenuistriatus pectoral fin spines. 1–4 in The diplacanthid fishes (Acanthodii, Diplacanthiformes, Diplacanthidae) from the Middle Devonian of Scotland
FIGURE 14. Diplacanthus tenuistriatus pectoral fin spines. 1–4, spine QM F58024 from Marwick, Orkney: 1, complete spine, dorsal surface; 2, ventral surface of spine; 3, recurved denticles on posterior edges of spine; 4, transverse natural fracture surface of distal part of spine, at point arrowed in (2); 5, NMS G.1901.153.1 from Appat Hill, Caithness; 6, NMS G.1898.163.2 from Birsay, Orkney; 7, NMS G.2014.4.18, from Marwick, Orkney, spine attached to pinnal plate. Scale bars equal 1 cm for 1, 2, 5–7; 1 mm for 3, 4.
FIGURE 12. Diplacanthus crassisimus scale histology. 1–7, NMS G. 2014.33.10 in The diplacanthid fishes (Acanthodii, Diplacanthiformes, Diplacanthidae) from the Middle Devonian of Scotland
FIGURE 12. Diplacanthus crassisimus scale histology. 1–7, NMS G. 2014.33.10 from Corbie Den, Banffshire, thin sections of a patch of midflank scales: 1, group of scales sectioned in various orientations; 2, vertical longitudinal section; 3, crown horizontal section; 4, horizontal section through the base; 5, 6, vertical longitudinal sections through articulated scales; 7, crown horizontal section. 8, 9, NMS G.2015.11.3 from Gamrie, Banffshire, isolated midflank scales: 8, crown horizontal section; 9, vertical section through the base and lower neck, imaged with cross nicols. 10, 11, NMS G.2015.11.2 from Gamrie, Banffshire: 10, vertical longitudinal section; 11, vertical longitudinal section. Scale bars equal 0.1 mm. Abbreviations: cgz=crown growth zones; dt=dentine tubule; p=canal opening; pc=pore canal; spc=spiral canal. Arrows indicate anterior direction, where relevant.
FIGURE 7. Diplacanthus crassisimus shoulder girdles. 1, NMS G in The diplacanthid fishes (Acanthodii, Diplacanthiformes, Diplacanthidae) from the Middle Devonian of Scotland
FIGURE 7. Diplacanthus crassisimus shoulder girdles. 1, NMS G.Canon Kyle no. 2 from Tynet Burn, Moray, showing ventral view of the shoulder girdle complexes; 2, NHM P.1357a from Tynet Burn, Moray, pectoral girdle region; 3, NHM P.22198 from Achanarras Quarry, Caithness, complete specimen; 4, NMS G.2014.44.3 from the Edderton, Ross and Cromarty; 5, 6, left shoulder girdle complex of NMS G.2014.4.30 from Cruaday Quarry, Orkney; 7, NMS G.2014.44.4 from the Edderton, Ross and Cromarty, natural transverse section through articulated uncompressed shoulder girdle region (prepelvic spines subsequently Sollas sectioned). Scale bars equal 1 cm.
FIGURE 3. Diplacanthus crassisimuss, NMS G.2014.4.29 in The diplacanthid fishes (Acanthodii, Diplacanthiformes, Diplacanthidae) from the Middle Devonian of Scotland
FIGURE 3. Diplacanthus crassisimuss, NMS G.2014.4.29, from Edderton, Ross and Cromarty, showing surface morphology of spines: 1, complete specimen; 2, line drawing identifying various elements; 3, circumorbital bone; 4, occlusal bones; 5, procoracoid with ventral plate attached. Scale bars equal: 1 cm for 1, 2; 1 mm for 3–5. Abbreviations: a.f=anal fin web; a.fs=anal fin spine; ad.f=anterior dorsal finweb; ad.fs=anterior dorsal fin spine; adm.s=admedian spine; co.p=circumorbital plate; lt.sc=left scapula; lt.pelv.fs=left pelvic fin spine; oc.p=occlusal plate; pd.f=posterior dorsal finweb; pd.fs-=posterior dorsal fin spine; pelv.f=pelvic finweb; prepelv.s=prepelvic spine; proc=procoracoid; rt.p.fs=right pectoral fin spine; rt.pelv.fs=right pelvic fin spine; rt.sc=right scapula; v.p=ventral plate. Arrow indicates anterior.
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