Unionicola (Hexatax) laurentiana Crowell & Davids, 1979

(See synonyms given in Vidrine 1996))

Report associated with sponges: This species was reported among sponge Spongilla lacustris from North America (Crowell & Davids 1979). This species was also reported associated with sponges Dosilia radiospiculata, Trochospongilla horrida, T. Pennsylvanica, and T. leidii from Louisina, Louisiana, North America (Vidrine et al.1986; Vidrine 1996).

Remarks: This was reported from encysted stages in the mussel (in suprabranchial chamber) Anodonta (= Pyganodon) grandis (Say, 1829) from Louisiana, North America (Vidrine et al. 1986). Molluscan hosts with mites in the mantle cavity: Amblem aplicata Say, 1871, Disconaias fimbriata (Frierson, 1907), Elliptio crassidens (Lamarck, 1819), Fusconaia askewi (Marsh, 1896), Lampsilis hydiana (Lea, 1838), Lampsilis teres (Rafinesque, 1820), Potamilus fragilis, (Rafinesque, 1820), Sagittunio subrostrata (Say, 1831), Nephronaias sp., Popenaias berezai Inoue et al. 2020, Popenaias popei (Lea, 1857), Pyganodon fragilis (Lamarck, 1819), P. grandis, Quadrula quadrula (Rafinesque, 1820), Cyclonaia spustulosa (Lea, 1831), Sphaerium simile (Say, 1817), Toxolasma parvus (Barnes, 1823), Tritogonia verrucosa (Rafinesque, 1820), Uniomerus tetralasmus (Say, 1831), and Leauniolienosus calliginosus (Lea, 1845) from Canada, Mexico, and USA, North America (Vidrine 1996; Edwards & Vidrine 2013).The mussel names have been updated to match current taxonomic treatments (see Vidrine 2019, Vidrine & Edwards 2021). Crowell & Davids (1979) also commented: ‘The records of Wolcott (1899) and materials in the Ruth Marshall Collection appear to be a mixture of U. laurentiana and U. nearctica’. Also, the U. crassipes used in their molecular study was actually U. laurentiana (Edwards et al. 2010) .