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31 results for “Polypteridae”
Figure 4. – A-B in Comparative morphology of the finlet spines of the extant Polypteridae (Osteichthyes; Cladistia). Systematic interest
Figure 4. – A-B: Polypterus bichir katangae; A: The anterior face of the spine is covered by an irregular ganoine layer, and shows the basal articular head (AH) and the shaft (SH); B: The posterior face of the spine shows, the median groove and the basal foramen on the shaft; the two arrow-heads indicate the two lateral pads. C-F: P. senegalus; detail of the anterior (C), the posterior (D), the left lateral (E), and the basal face (F) of the articular head, respectively, to show the various significant processes; the arrowhead points to the median groove (F). Scale bars: A, B = 1 mm; C-F = 0.5 mm.
Figure 10 in Comparative morphology of the finlet spines of the extant Polypteridae (Osteichthyes; Cladistia). Systematic interest
Figure 10. – Polypterus senegalus. Lateral view of the ten finlet spines (sp1-sp10) and the first lepidotrichium (lep) of the posterior part of the dorsal fin. The anterior and posterior sides are respectively on the left and on the right. Scale bar = 1 mm.
Figure 16 in Comparative morphology of the finlet spines of the extant Polypteridae (Osteichthyes; Cladistia). Systematic interest
Figure 16. – Posterior view of the articular heads. The geometrical schematic figures (triangle, square, trapezium, circle) circumscribe the various processes improving the diagnostic characters of the articular head. Scale bar = 0.5 mm.
Figure 13 in Comparative morphology of the finlet spines of the extant Polypteridae (Osteichthyes; Cladistia). Systematic interest
Figure 13. – Details of the anterior side of the articular head of the 7th finlet spine, except Polypterus bichir bichir 1st, P. b. lapradei 16th, P. polli 3th and P. senegalus 6th. The arrows point to the ganoine. Scale bars = 1 mm.
Figure 9 in Comparative morphology of the finlet spines of the extant Polypteridae (Osteichthyes; Cladistia). Systematic interest
Figure 9. – Polypterus senegalus. Basal view of the articular head of the ten finlet spines (S1-S10) of the anterior dorsal fin. Scale bar = 1 mm.
Figure 12. – Erpetoichthys calabaricus. A in Comparative morphology of the finlet spines of the extant Polypteridae (Osteichthyes; Cladistia). Systematic interest
Figure 12. – Erpetoichthys calabaricus. A: The posterior face of 6th finlet spine. B: Basal view of the articular head of the same finlet spine showing the glenoid cavity and the processes. Scale bars = 0.5 mm.
Figure 6 in Comparative morphology of the finlet spines of the extant Polypteridae (Osteichthyes; Cladistia). Systematic interest
Figure 6. – Polypterus senegalus (male, 260 mm TL). A: Posterior side of the shaft showing, in the median groove, three branches of the lepidotrichium: the primary branch and two secondary branches going out of the median grove. B-C: Respectively lateral and sagittal axial sections of a finlet spine showing the vascular network (B: in black) and the insertion (in C) of the branches of the lepidotrichium (modified from Meunier, 1980). Scale bars = 1 mm.
Figure 7 in Comparative morphology of the finlet spines of the extant Polypteridae (Osteichthyes; Cladistia). Systematic interest
Figure 7. – Polypterus senegalus (male, 260 mm TL). A-I: Nine successive transversal sections (from the base to the tip) of a finlet spine: section F crosses the glenoid cavity and is associated to a lateral scale; section B crosses the foramen; the seven other sections (C-I) are regularly dispatched along the shaft, the two last ones crossing four branches of the lepidotrichium: the primary branch at the bottom of the median groove and three secondary branches. The asterisks point to the medullar canal. Scale bar = 0.5 mm.
Figure 15 in Comparative morphology of the finlet spines of the extant Polypteridae (Osteichthyes; Cladistia). Systematic interest
Figure 15. – Posterior side of the whole finlet spine showing the peculiarities of the articular head and of the median groove of the shaft. 7th spine, except Erpetoichthys calabaricus and Polypterus bichir bichir 1st, P. b. lapradei 16th, P. polli 3th and P. senegalus 6th. Scale bars = 0.5 mm for Erpetoichthys; 1 mm for Polypterus species.
Data from: Boom and bust: ancient and recent diversification in bichirs (Polypteridae: Actinopterygii), a relictual lineage of ray-finned fishes
Open the record for dataset details and reuse information.
Figure 5 in Comparative morphology of the finlet spines of the extant Polypteridae (Osteichthyes; Cladistia). Systematic interest
Figure 5. – Schematic drawing showing the seven stages (from the left to the right: A-G), of the formation of the finlet spine (B-G) at the surface of the lepidotrichium (A), and of three different secondary branches (1, 2, 3) (C-G) of the finlet lepidotrichium. The spine grows in length towards the tip of the finlet, and so progressively includes the primary lepidotrichium (C-G).
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