Arango, C. P., and A. Maxmen. “Proboscis Ornamentation As a Diagnostic Character for the Anoplodactylus californicus-digitatus Complex (Arthropoda: Pycnogonida) With an Example from the Anoplodactylus Eroticus Female”. Zootaxa, vol. 1311, no. 1, Sept. 2006, pp. 51–64, doi:10.11646/zootaxa.1311.1.3.