Scatterplot of the loadings for the first two principal components. Key: l and b, length and base measurements respectively, from hooks in the 4.5-79.5% region of the proboscis; L and B, length and base measurements respectively, from hooks in the 80.5-95.5% region of the proboscis.  
  Part of: Wayland M (2013) Morphological variation in Echinorhynchus truttae Schrank, 1788 and the E. bothniensis Zdzitowiecki & Valtonen, 1987 species complex from freshwater fishes of northern Europe. Biodiversity Data Journal 1: e975. https://doi.org/10.3897/BDJ.1.e975