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113 results for “Dipnoi”
Figure 7 in The interrelationships of Devonian lungfishes (Sarcopterygii: Dipnoi) as inferred from neurocranial evidence and new data from the genus Soederberghia Lehman, 1959
Figure 7. Soederberghia groenlandica, visceral surface of dermal skull roof with endoskeletal ossifications of the ethmoid region (MGUH VP 28398). Anterior is to the top. A, specimen photograph; B, interpretive drawing. Light grey shading in B corresponds to areas of matrix with bone impressions, while dark grey regions represent matrix. Diagonal hatching indicates damaged bone surface. Scale bar represents 20 mm.
Figure 24 in The interrelationships of Devonian lungfishes (Sarcopterygii: Dipnoi) as inferred from neurocranial evidence and new data from the genus Soederberghia Lehman, 1959
Figure 24. Distribution of cladogram lengths for the neurocranial data set for 1 × 108 randomly generated topologies. Arrow marked with MPT indicates the length of the shortest tree for the neurocranial data set (L = 125), while that marked with CB indicates the length of the shortest tree returning a topology consistent with the three-lineage scheme of Campbell & Barwick (1990; L = 143). These two cladograms are considerably shorter than most possible topologies, falling within the far left tail of the treelength distribution (the shortest 5% of all trees fall to the left of the dashed line marked with 95%). All other constrained topologies examined in this paper (monophyletic Chirodipterus: L = 137; monophyletic 'Chirodipteridae': L = 132; [Holodipterus + Griphognathus]: L = 133; monophyletic Griphognathus: L = 130) lie between the two arrows.
Figure 11 in The interrelationships of Devonian lungfishes (Sarcopterygii: Dipnoi) as inferred from neurocranial evidence and new data from the genus Soederberghia Lehman, 1959
Figure 11. Palatal bones of fleurantiid lungfishes. Anterior is to the top in both figures. A, interpretive drawing of the palate of Fleurantia denticulata in dorsal view (BMNH P24748); B, specimen photograph of the parasphenoid of Jarvikia arctica in ventral view (MGUH VP 28401). Scale bar represents 10 cm.
Figure 4 in The interrelationships of Devonian lungfishes (Sarcopterygii: Dipnoi) as inferred from neurocranial evidence and new data from the genus Soederberghia Lehman, 1959
Figure 4. Soederberghia groenlandica, interpretive drawing of a cross-section through the occipital region (MGUH VP 28400). Dark shading represents matrix, while diagonal hatching indicates damaged surface. View is that indicated in Figures 1, 2 by bold arrow. Scale bar represents 10 mm.
Figure 16 in The interrelationships of Devonian lungfishes (Sarcopterygii: Dipnoi) as inferred from neurocranial evidence and new data from the genus Soederberghia Lehman, 1959
Figure 16. Reinterpretation of the neurocranium of Stomiahykus thlaodus. Anterior is to the top. A, photograph of CMN 22600, showing palate and otic and occipital regions of the neurocranium in ventral view; B, interpretive drawing. Only those morphological features reinterpreted relative to the description of Bernacsek (1977) are labelled here for clarity. Diagonal hatching in B indicates damaged bone surface. Scale bar represents 20 mm.
Figure 6 in The interrelationships of Devonian lungfishes (Sarcopterygii: Dipnoi) as inferred from neurocranial evidence and new data from the genus Soederberghia Lehman, 1959
Figure 6. Soederberghia groenlandica, mould of the visceral surface of the dermal skull roof (MGUH VP 3036). Anterior is to the top. Asterisk marks orbit, while regions visible in specimen photograph are shaded in inset drawing. Scale bar represents 20 mm.
Figure 19 in The interrelationships of Devonian lungfishes (Sarcopterygii: Dipnoi) as inferred from neurocranial evidence and new data from the genus Soederberghia Lehman, 1959
Figure 19. Unambiguous character changes mapped on one of 72 most parsimonious cladograms (tree statistics with no character ordering implemented: L = 125, CI = 0.5760, RI = 0.8094, RCI = 0.4662) retrieved from analysis of data derived from the neurocranial complex. Branch lengths scaled to the number of unambiguous character changes occurring along them. Phylogram is truncated above Stomiahykus and Uranolophus; two alternative resolutions for the clade above these taxa are given in Figures 20, 21.
Figure 3 in The interrelationships of Devonian lungfishes (Sarcopterygii: Dipnoi) as inferred from neurocranial evidence and new data from the genus Soederberghia Lehman, 1959
Figure 3. Soederberghia groenlandica, reconstructed braincase in left lateral view based on MGUH VP 28400. Diagonal hatching indicates unfinished articular area. Shaded regions in inset drawing indicates regions depicted. Scale bar represents 20 mm.
Figure 5 in The interrelationships of Devonian lungfishes (Sarcopterygii: Dipnoi) as inferred from neurocranial evidence and new data from the genus Soederberghia Lehman, 1959
Figure 5. Soederberghia groenlandica, visceral surface of dermal skull roof with impressions of the otoccipital region of the braincase (MGUH VP 28400). Anterior is to the left, midline is to the top. A, specimen photograph; B, interpretive drawing. Light grey shading in B corresponds to areas of matrix with bone impressions, while dark grey regions represent matrix. Diagonal hatching indicates damaged bone surface. Scale bar represents 20 mm.
Figure 2 in The interrelationships of Devonian lungfishes (Sarcopterygii: Dipnoi) as inferred from neurocranial evidence and new data from the genus Soederberghia Lehman, 1959
Figure 2. Soederberghia groenlandica, otoccipital region of neurocranium in left lateral view (MGUH VP 28400). A, specimen photograph; B, interpretive drawing. Light grey shading in B corresponds to areas of matrix with bone impressions, while dark grey regions represent matrix. Diagonal hatching indicates damaged bone surface. Large arrow indicates view illustrated in Figure 4. Shaded regions in inset drawing indicates regions preserved in A and B. Scale bar represents 20 mm.
Figure 15 in The interrelationships of Devonian lungfishes (Sarcopterygii: Dipnoi) as inferred from neurocranial evidence and new data from the genus Soederberghia Lehman, 1959
Figure 15. Select neurocranial characters incorporated into the phylogenetic analysis of dipnoan interrelationships. Anterior is to the left. A, 'Chirodipterus' australis (modified from Miles, 1977); B, Chirodipterus wildungensis (modified from Säve-Söderbergh, 1952). Numerals in bold type correspond to characters listed in text, while those listed in parentheses indicate the character state.
Figure 22 in The interrelationships of Devonian lungfishes (Sarcopterygii: Dipnoi) as inferred from neurocranial evidence and new data from the genus Soederberghia Lehman, 1959
Figure 22. Hypothesis of early lungfish interrelationships based on Bayesian inference analysis of data derived from the neurocranial complex. Values associated with nodes indicate the frequency with which those bipartitions occur among sampled trees (posterior probabilities). This result is based on 7500 sampled trees (the first 2500 trees from the 'burn-in' interval have been discarded).
Figure 9 in The interrelationships of Devonian lungfishes (Sarcopterygii: Dipnoi) as inferred from neurocranial evidence and new data from the genus Soederberghia Lehman, 1959
Figure 9. Soederberghia groenlandica, latex peel of negative preparation of an isolated left entopterygoid in ventral view (MGUH VP 28397). Anterior is to the top. A, specimen photograph; B, interpretive drawing. Dark grey shading in B indicates matrix. Scale bar represents 20 mm.
Figure 10 in The interrelationships of Devonian lungfishes (Sarcopterygii: Dipnoi) as inferred from neurocranial evidence and new data from the genus Soederberghia Lehman, 1959
Figure 10. Soederberghia groenlandica, close-up of latex peel of negative preparation of palate (predominantly right entopterygoid) in ventral view (MGUH VP 28397). Anterior is to the top. Scale bar represents 10 mm.
Figure 21 in The interrelationships of Devonian lungfishes (Sarcopterygii: Dipnoi) as inferred from neurocranial evidence and new data from the genus Soederberghia Lehman, 1959
Figure 21. Unambiguous character changes mapped on one possible resolution of the clade above Stomiahykus and Uranolophus found among the 72 most parsimonious cladograms (tree statistics with no character ordering implemented: L = 125, CI = 0.5760, RI = 0.8094, RCI = 0.4626) retrieved from analysis of data derived from the neurocranial complex. This topology places Melanognathus in a more apical position relative to that shown in Figure 20, as the sister taxon of the radiation comprising Orlovichthys, Chirodipterus wildungensis, 'holodontids' and 'rhynchodipterids'.
Figure 14 in The interrelationships of Devonian lungfishes (Sarcopterygii: Dipnoi) as inferred from neurocranial evidence and new data from the genus Soederberghia Lehman, 1959
Figure 14. Reinterpretation of the neurocranium of Griphognathus minutidens. Anterior is to the top. A, photograph of NRM P6173, showing otic and occipital regions in ventral view; B, interpretive drawing (modified from Schultze, 1969). Shaded area in B indicates portions of the otic and occipital region underlain by the missing portions of the parasphenoid stalk and corpus, while diagonal hatching indicates damaged bone surface. The apparent foramina on the wall of the otic capsule have been interpreted as accommodating cranial nerves by Schultze (1969), but this specimen is badly crushed and uncertainties about these identifications are indicated by appending them with '?'. The unossified facet for the first epibranchial was initially mistaken as a foramen for a ventral branch of the acoustic (VIII) nerve (Schultze, 1969). Scale bar represents 10 mm.
Figure 23 in The interrelationships of Devonian lungfishes (Sarcopterygii: Dipnoi) as inferred from neurocranial evidence and new data from the genus Soederberghia Lehman, 1959
Figure 23. Previous hypotheses of early lungfish interrelationships. A, Campbell & Barwick (1990); B, Schultze & Marshall (1993); C, Schultze (2001); D, Ahlberg et al. (2006; strict consensus topology of the analysis of their total data set). Cladograms have been pruned to eliminate all taxa not included in this analysis in order to facilitate comparison with Figures 18–22.
Figure 8 in The interrelationships of Devonian lungfishes (Sarcopterygii: Dipnoi) as inferred from neurocranial evidence and new data from the genus Soederberghia Lehman, 1959
Figure 8. Soederberghia groenlandica, latex peel of negative preparation of a palate in ventral view (MGUH VP 28397; same individual as in Figs 9, 10, 12). Anterior is to the top. A, specimen photograph; B, interpretive drawing. Dark grey regions in B represent matrix, while diagonal hatching indicates damaged bone surface. Scale bar represents 20 mm.
Figure 18 in The interrelationships of Devonian lungfishes (Sarcopterygii: Dipnoi) as inferred from neurocranial evidence and new data from the genus Soederberghia Lehman, 1959
Figure 18. Hypothesis of early lungfish interrelationships based on maximum parsimony analysis of data derived from the neurocranial complex. Strict consensus topologies of 72 most parsimonious cladograms (tree statistics with no character ordering implemented: L = 125, CI = 0.5760, RI = 0.8094, RCI = 0.4662). A, strict consensus topology; B, strict reduced consensus topology pruning Melanognathus and 'Chirodipterus' liangchengi from all constituent cladograms; C, strict reduced consensus topology pruning Melanognathus from all constituent cladograms. Numbers below nodes in A represent Bremer decay indices and bootstrap values (where the latter are greater than or equal to 50%).
Figure 12 in The interrelationships of Devonian lungfishes (Sarcopterygii: Dipnoi) as inferred from neurocranial evidence and new data from the genus Soederberghia Lehman, 1959
Figure 12. Soederberghia groenlandica, latex peel of negative preparation of right entopterygoid in dorsal view (MGUH VP 28397). Anterior is to the right. A, specimen photograph; B, interpretive drawing. Dark grey shading in B represents matrix, while diagonal hatching indicates damaged bone surface. Shaded area in inset drawing indicates region preserved in A and B. Scale bar represents 20 mm.
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