[5] Correa et al. (2010)[2] examined phylogenetic relationships among 50 taxa of this family using a supermatrix approach (concatenation of the 16S, internal transcribed spacers ITS1 and ITS2 genes) involving both maximum likelihood and Bayesian inference.

[2] Her phylogenetic analysis demonstrates the existence of three deep clades of Lymnaeidae representing the main geographic origin of species (America, Eurasia and the Indo-Pacific region).

[2] Correa et al. (2010)[2] proposed that species of clade C2 should all be called Lymnaea, according to the principle of priority of the International Code of Zoological Nomenclature (ICZN).

[2] On the other hand, at least four genera names have been used for species of clade C1b: Lymnaea Lamarck, 1799; Galba Schrank, 1803; Fossaria Westerlund, 1885; and Bakerilymnaea.

[2] An unidentified fragmentary lymnaeid from deposits of the Meyer Desert Formation (reported in 2003) was the first freshwater snail recorded from Antarctica.

[2] In contrast, the anatomy of their reproductive tracts (including prostate, penis and preputium) is extremely homogeneous.

[2] Immunological, cytogenetical, enzyme electrophoresis studies, and DNA-based approaches have demonstrated extensive homoplasy in anatomical characters.

[2] The most emblematic case of parasite transmitted by lymnaeids is Fasciola hepatica (Digenea: Fasciolidae), the agent of fascioliasis.

[2] Mollusks, generally lymnaeids, are required as intermediate hosts to complete the life cycle of Fasciola hepatica.