Balkhash perch
... that Karl Kessler's 1874 description of the Balkhash perch as a new species was based on specimens collected on Alexander von Schrenk's expedition to Turkestan in 1842?
... that <a href="./Karl_Kessler" id="mwAtM" rel="mw:WikiLink" title="Karl Kessler">Karl Kessler</a>'s 1874 description of the <b id="mwAtQ"><a href="./Balkhash_perch" id="mwAtU" rel="mw:WikiLink" title="Balkhash perch">Balkhash perch</a></b> as a new species was based on specimens collected on <a href="./Alexander_von_Schrenk" id="mwAtY" rel="mw:WikiLink" title="Alexander von Schrenk">Alexander von Schrenk</a>'s expedition to Turkestan in 1842?