Halmaturus houtmannii Well finished head study of a female, with two quick sketches of a male; "female Houtmanni / male"; measurements of body parts. The published text for Halmaturus parma implies that Gould may not have illustrated Halmaturus houtmannii because of questions whether it was a species distiinct from Halmaturus derbianus or Halmaturus parma rather than a distinct species.