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9 results for “Dunkleosteus”
Figure 4 in Two new species of Dunkleosteus Lehman, 1956, from the Ohio Shale Formation (USA, Famennian) and the Kettle Point Formation (Canada, Upper Devonian), and a cladistic analysis of the Eubrachythoraci (Placodermi, Arthrodira)
Figure 4. Dunkleosteus raveri sp. nov. (MCZ 13277). A, skull roof in internal view. Scale bar: 10 cm. B, parasphenoid in ventral view. Scale bar: 1 cm.
Figure 9. A in Two new species of Dunkleosteus Lehman, 1956, from the Ohio Shale Formation (USA, Famennian) and the Kettle Point Formation (Canada, Upper Devonian), and a cladistic analysis of the Eubrachythoraci (Placodermi, Arthrodira)
Figure 9. A, strict consensus tree based on 98 characters and 23 taxa derived from PAUP* (consensus tree length, TL = 246; consistency index, CI = 0.498; retention index, RI = 0.502; and Rohlf's CI = 0.708; consensus based on six trees, TL = 237, CI = 0.498, and RI = 0.537). B, strict consensus tree based on 98 characters and 22 taxa (excluding Kiangyousteus yohii, consensus TL = 237, CI = 0.498, RI = 0.535, and Rohlf's CI = 0.993; consensus based on three trees, TL = 237, CI = 0.498, and RI = 0.535). Named nodes: node 1, Brachythoraci; node 4, Eubrachythoraci; node 5, Pachyosteomorphi; node 6, Coccosteomorphi; node 8, Aspinothoracidi; node 9, Dunkleosteus; node 10, Panxiosteidae; node 11, Dunkleosteidae; node 12, Dunkleosteoidea; and node 13, Dinichthyidae. *Character scores for Homostius compiled for the Baltic species sensu Heintz, 1934. **Scores based on Camuropiscis concinnus and Camuropiscis laidlawi.
Figure 2. Regional geography and stratigraphic relationships. A in Two new species of Dunkleosteus Lehman, 1956, from the Ohio Shale Formation (USA, Famennian) and the Kettle Point Formation (Canada, Upper Devonian), and a cladistic analysis of the Eubrachythoraci (Placodermi, Arthrodira)
Figure 2. Regional geography and stratigraphic relationships. A, geography and depositional basins for the USA mid-continent (modified from Elliott et al., 2000). Fossil localities: 1, Dunkleosteus raveri sp. nov. (northern Ohio); 2, Dunkleosteus amblyodoratus sp. nov. (Kettle Point, Ontario); 3, Dinichthys herzeri (western Ohio). Structural features (thick dashed lines): a, Algonquin Arch; c, Cincinnati Arch; f, Findlay Arch. State boundaries, dot double-dash lines; Canadian boundary, dotted lines. Concentric lines of basinal deposition, thin dashed lines. Great Lakes (grey). B, generalized stratigraphic columns for the Appalachian and Michigan basins. Modified and updated from Elliott et al. (2000). A Famennian age for the entire Ohio Shale Formation is based on Over & Rhodes (2000). The presence of the Chagrin Shale Member in central Ohio is based on subsurface g-ray profiles (Walker & Babcock, 1999). Fossil localities as in A. Hiatuses in grey. O.b. = Olmsted bed in the Cleveland Shale Member.
Figure 8 in Two new species of Dunkleosteus Lehman, 1956, from the Ohio Shale Formation (USA, Famennian) and the Kettle Point Formation (Canada, Upper Devonian), and a cladistic analysis of the Eubrachythoraci (Placodermi, Arthrodira)
Figure 8. Dorsal view of a generalized eubrachythoracid arthrodire skull roof, presented as a flattened image. The measurements (a, b, and c) used in the length ratios (r1 and r2) of characters 92 and 93 are indicated: r1 (character 92) = b/c; r2 (character 93) = a/c. Not drawn to scale.
Figure 1. Dinichthys herzeri. A, AMNH 81 in Two new species of Dunkleosteus Lehman, 1956, from the Ohio Shale Formation (USA, Famennian) and the Kettle Point Formation (Canada, Upper Devonian), and a cladistic analysis of the Eubrachythoraci (Placodermi, Arthrodira)
Figure 1. Dinichthys herzeri. A, AMNH 81 (holotype), incomplete nuchal plate in internal view. B, AMNH 73 (paratype), left inferognathal plate in lateral view. C, AMNH 34, left anterior superognathal in lateral view. D, AMNH 33, right posterior superognathal in lateral view. Reconstruction of six denticles in the posterior tooth row based on CMNH 7257. Drawings reproduced from Hlavin, 1976. Scale bars equal 3 cm.
Figure 3 in Two new species of Dunkleosteus Lehman, 1956, from the Ohio Shale Formation (USA, Famennian) and the Kettle Point Formation (Canada, Upper Devonian), and a cladistic analysis of the Eubrachythoraci (Placodermi, Arthrodira)
Figure 3. Dunkleosteus raveri sp. nov. (MCZ 13277). Reconstruction and skull roof, former based on a photograph tracing in dorsal view (A, C) and right lateral (B, D) views. Plate boundaries are difficult to discern as a result of poor preservation. Solid lines indicate clear boundaries. Dashed lines indicate dubious boundaries. Sensory line grooves are indicated by dotted lines. Scale bar: 10 cm.
Figure 7 in Two new species of Dunkleosteus Lehman, 1956, from the Ohio Shale Formation (USA, Famennian) and the Kettle Point Formation (Canada, Upper Devonian), and a cladistic analysis of the Eubrachythoraci (Placodermi, Arthrodira)
Figure 7. Dunkleosteus amblyodoratus sp. nov. (UM 101105). Parasphenoid in ventral view. Scale bar: 1 cm.
Figure 6 in Two new species of Dunkleosteus Lehman, 1956, from the Ohio Shale Formation (USA, Famennian) and the Kettle Point Formation (Canada, Upper Devonian), and a cladistic analysis of the Eubrachythoraci (Placodermi, Arthrodira)
Figure 6. Dunkleosteus amblyodoratus sp. nov. (UM 101105). A, B, nuchal and paranuchal plates, and reconstruction, in internal view. C, external reconstruction. Dotted lines indicate incomplete edges; dashed lines indicate the reconstruction of the posterolateral corner of the nuchal plate. Scale bars: 5 cm.
Figure 5 in Two new species of Dunkleosteus Lehman, 1956, from the Ohio Shale Formation (USA, Famennian) and the Kettle Point Formation (Canada, Upper Devonian), and a cladistic analysis of the Eubrachythoraci (Placodermi, Arthrodira)
Figure 5. Dunkleosteus raveri sp. nov. (MCZ 13277). Dermal ornamentation on postorbital plate. Scale bar: 1 cm.
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