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350 results for “Guiana Shield”
FIGURE 21 in Review of Ancistrus (Siluriformes: Loricariidae) from the northwestern Guiana Shield, Orinoco Andes, and adjacent basins with description of six new species
FIGURE 21. Ancistrus saudades, holotype, in dorsal, lateral, and ventral views, CSBD F 1722, 107.5 mm SL. Scale = 1 cm. Photos by J.W. Armbruster.
FIGURE 20 in Review of Ancistrus (Siluriformes: Loricariidae) from the northwestern Guiana Shield, Orinoco Andes, and adjacent basins with description of six new species
FIGURE 20. Live coloration of head of Ancistrus patronus in dorsal and lateral views, AUM 43868, 79.4 mm SL. Scale = 1 cm. Photos by N.K. Lujan.
FIGURE 18 in Review of Ancistrus (Siluriformes: Loricariidae) from the northwestern Guiana Shield, Orinoco Andes, and adjacent basins with description of six new species
FIGURE 18. Ancistrus nudiceps in dorsal, lateral, and ventral views, AUM 35623, 140.2 mm SL. Scale = 1 cm. Photos by J.W. Armbruster.
FIGURE 17 in Review of Ancistrus (Siluriformes: Loricariidae) from the northwestern Guiana Shield, Orinoco Andes, and adjacent basins with description of six new species
FIGURE 17. Live coloration of Ancistrus macropthalmus in dorsal and lateral views, AUM 43264, 67.8 mm SL. Scale = 1 cm. Photo by M.H. Sabaj.
FIGURE 26 in Review of Ancistrus (Siluriformes: Loricariidae) from the northwestern Guiana Shield, Orinoco Andes, and adjacent basins with description of six new species
FIGURE 26. Live coloration Ancistrus triradiatus in lateral view. Uncataloged, Quebrada Aqua Blanca, río Cusiana - río Meta Draianage, 05.00656°, -072.78792°. Photo by A. Urbano-Bonilla.
FIGURE 16 in Review of Ancistrus (Siluriformes: Loricariidae) from the northwestern Guiana Shield, Orinoco Andes, and adjacent basins with description of six new species
FIGURE 16. Ancistrus macropthalmus in dorsal, lateral, and ventral views, AUM 53526, 87.3 mm SL. Scale = 1 cm. Photos by J.W. Armbruster.
FIGURE 14 in Review of Ancistrus (Siluriformes: Loricariidae) from the northwestern Guiana Shield, Orinoco Andes, and adjacent basins with description of six new species
FIGURE 14. Ancistrus lithurgicus in dorsal, lateral, and ventral views, AUM 38182, 100.3 mm SL. Scale = 1 cm. Photos by J.W. Armbruster.
FIGURE 28 in Review of Ancistrus (Siluriformes: Loricariidae) from the northwestern Guiana Shield, Orinoco Andes, and adjacent basins with description of six new species
FIGURE 28. Ancistrus yutajae, holotype, in dorsal, lateral, and ventral views, MCNG 7854, 82.8 mm SL. Scale = 1 cm. Photos by J.W. Armbruster.
FIGURE 13 in Review of Ancistrus (Siluriformes: Loricariidae) from the northwestern Guiana Shield, Orinoco Andes, and adjacent basins with description of six new species
FIGURE 13. Ancistrus leucostictus in dorsal, lateral, and ventral views, AUM 48162, 185.3 mm SL. Scale = 1 cm. Photos by J.W. Armbruster.
FIGURE 22 in Review of Ancistrus (Siluriformes: Loricariidae) from the northwestern Guiana Shield, Orinoco Andes, and adjacent basins with description of six new species
FIGURE 22. Live coloration of Ancistrus saudades in dorsal and lateral views, AUM 67055, 58.1 mm SL. Scale = 1 cm. Photos by N.K. Lujan.
FIGURE 11 in Review of Ancistrus (Siluriformes: Loricariidae) from the northwestern Guiana Shield, Orinoco Andes, and adjacent basins with description of six new species
FIGURE 11. Holotype of Ancistrus leoni in dorsal, lateral, and ventral views, MCNG 53811, 81.6 mm SL. Scale = 1 cm. Photos by J.W. Armbruster.
FIGURE 7 in Review of Ancistrus (Siluriformes: Loricariidae) from the northwestern Guiana Shield, Orinoco Andes, and adjacent basins with description of six new species
FIGURE 7. Distribution of species of Ancistrus from the northwestern Guiana Shield and neighboring regions.
FIGURE 10 in Review of Ancistrus (Siluriformes: Loricariidae) from the northwestern Guiana Shield, Orinoco Andes, and adjacent basins with description of six new species
FIGURE 10. Live coloration of the holotype of Ancistrus kellerae in dorsal and lateral views, CSBD F 1721, 69.9 mm SL. Scale = 1 cm. Photos by J.W. Armbruster.
FIGURE 25 in Review of Ancistrus (Siluriformes: Loricariidae) from the northwestern Guiana Shield, Orinoco Andes, and adjacent basins with description of six new species
FIGURE 25. Ancistrus triradiatus in dorsal, lateral, and ventral views, MCNG 8199, 77.7 mm SL. Scale = 1 cm. Photos by J.W. Armbruster.
FIGURE 15 in Review of Ancistrus (Siluriformes: Loricariidae) from the northwestern Guiana Shield, Orinoco Andes, and adjacent basins with description of six new species
FIGURE 15. Live coloration of Ancistrus lithurgicus in dorsal and dorsolateral views, AUM 37941, 40.4 mm SL. Scale = 1 cm. Photo by M.H. Sabaj.
FIGURE 5 in Review of Ancistrus (Siluriformes: Loricariidae) from the northwestern Guiana Shield, Orinoco Andes, and adjacent basins with description of six new species
FIGURE 5. Heads, dorsal view, of A. Ancistrus nudiceps AUM 35623, 140.2 mm SL and B. A. patronus, holotype, AUM 39876, 83.6 mm SL demonstrating differences in head shape and tentacle pattern. Ancistrus nudiceps has a longer, more spatulate snout with the point from the edge of medial snout plates to the end of the snout (turquoise line) much shorter than the distance from the edge of the medial snout plates to a line through the anterior margins of the orbits (yellow line, dashed line is the line that demarks the anterior borders of the orbits) while the two lengths are approximately equal in A. patronus. In addition, the anterior margin of the snout plates form a rough V in A. nudiceps and a U in A. patronus (solid white line). Scale = 1 cm. Photos by J.W. Armbruster.
FIGURE 8 in Review of Ancistrus (Siluriformes: Loricariidae) from the northwestern Guiana Shield, Orinoco Andes, and adjacent basins with description of six new species
FIGURE 8. Ancistrus brevifilis in dorsal, lateral, and ventral views, MCNG 14304, 61.2 mm SL. Scale = 1 cm. Photos by J.W. Armbruster.
FIGURE 19 in Review of Ancistrus (Siluriformes: Loricariidae) from the northwestern Guiana Shield, Orinoco Andes, and adjacent basins with description of six new species
FIGURE 19. Ancistrus patronus, holotype, in dorsal, lateral, and ventral views, AUM 39876, 83.6 mm SL. Scale = 1 cm. Photos by J.W. Armbruster.
FIGURE 6 in Review of Ancistrus (Siluriformes: Loricariidae) from the northwestern Guiana Shield, Orinoco Andes, and adjacent basins with description of six new species
FIGURE 6. Holotype of Ancistrus amaris in dorsal, lateral, and ventral views, MCNG 41858, 103.4 mm SL. Scale = 1 cm. Photos by J.W. Armbruster.
FIGURE 27 in Review of Ancistrus (Siluriformes: Loricariidae) from the northwestern Guiana Shield, Orinoco Andes, and adjacent basins with description of six new species
FIGURE 27. Some of the diversity present in Ancistrus triradiatus. A. Specimen from the lower Río Caroni showing a lateral body color similar to A. leucostictus and an abdomen with very slight spotting, AUM 36554, 86.2 mm SL. Photos by J.W. Armbruster. B. Specimen from southwestern Venezuela in dorsal view with short pectoral fins, AUM 22190, 80.1 mm SL.
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