[{"clade":"Total group Plecoglossidae","fossil":"Speirsaenigma lindoei","left":"Plecoglossus_altivelis_altivelis","right":"Salangichthys_microdon","min":"56.83","max":"118.4646847","locality":"Paskapoo Formation, Canada","authority":"Wilson & Williams (1991)","age_authority":"Magnetic polarity chron C25n encompassing Tiffanian NALMA, age estimate derived from Gradstein et al. (2012)"}]