Ituarte, C. and Korniushin, A.V. 2006. Anatomical characteristics of two enigmatic and two poorly known Pisidium species (Bivalvia: Sphaeriidae) from Southern South America. Zootaxa. 1338, 1 (Oct. 2006), 33–47. DOI:https://doi.org/10.11646/zootaxa.1338.1.2.