. The Canadian field-naturalist. 1983 Notes 335. Figure 1. Ventral view of pelvic skeletons of Gasterosteus aculeatus showing morphological variation. The standard lengths for specimens are; A = mm, B = mm, C = mm, D = mm, E = mm and F = mm. AB = as- cending branch, AP = anterior process, PP = posterior proces, and SP = Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ottawa Field-Natura
. The Canadian field-naturalist. 1983 Notes 335. Figure 1. Ventral view of pelvic skeletons of Gasterosteus aculeatus showing morphological variation. The standard lengths for specimens are; A = mm, B = mm, C = mm, D = mm, E = mm and F = mm. AB = as- cending branch, AP = anterior process, PP = posterior proces, and SP = Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ottawa Field-Naturalists' Club. Ottawa, Ottawa Field-Naturalists' Club
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