Passer predomesticus
... that the fossil relative of the House Sparrow Passer predomesticus is known only from two upper jaw bones?
... that the fossil relative of the <a class="mw-redirect" href="./House_Sparrow" id="mwD3U" rel="mw:WikiLink" title="House Sparrow">House Sparrow</a> <i id="mwD3Y"><b id="mwD3c"><a href="./Passer_predomesticus" id="mwD3g" rel="mw:WikiLink" title="Passer predomesticus">Passer predomesticus</a></b></i> is known only from two <a href="./Premaxilla" id="mwD3k" rel="mw:WikiLink" title="Premaxilla">upper jaw bones</a>?