Scatterplot of the loadings for PC1 and PC2. Key: BL, body length; BW, body width; PL, proboscis length; PW, proboscis width; PRL, proboscis receptacle length; PRW, proboscis receptacle width; LL, lemniscus length; LW, lemniscus width; HKL, maximum hook blade length; NROWS, number of longitudinal rows of hooks; HKSROW, maximum number of hooks per longitudinal row.  
  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.