Kuhn and Ludwig (1967) divided this taxon into five named subspecies: P. (P.) obtusus obtusus, P. (P.) obtusus gracilileps, P. (P.) obtusus japonicus, P. (P.) obtusus longiceps, and P. (P.) obtusus paralleliceps; they also recognized a sixth subspecies which they did not name. [ex. Durden, L. A., Musser, G. G. 1994. Bulletin of the American Museum of Natural History 218: 1-90]
Taxon Citation Remarks:
Citation information points to the most recent interpretation of the taxon name (not the original, which is absent from the sucking louse checklist).