Enghoff, H. 2020. A mountain of millipedes VIII. The genus Aquattuor Frederiksen, 2013 revisited – a new species from the Udzungwa Mts, Tanzania, another from the Nguru Mts and introduction of the first pair of male legs as a source of taxonomic characters (Diplopoda, Spirostreptida, Odontopygidae). European Journal of Taxonomy. 626 (Apr. 2020). DOI:https://doi.org/10.5852/ejt.2020.626.