Aonchotheca forresteri
... that although related species usually infect several hosts, the parasitic nematode worm Aonchotheca forresteri is known only from the marsh rice rat?
... that although related species usually infect several <a href="./Host_(biology)" id="mwFaY" rel="mw:WikiLink" title="Host (biology)">hosts</a>, the <a class="mw-redirect" href="./Parasitic" id="mwFac" rel="mw:WikiLink" title="Parasitic">parasitic</a> <a href="./Nematode" id="mwFag" rel="mw:WikiLink" title="Nematode">nematode</a> worm <i id="mwFak"><b id="mwFao"><a href="./Aonchotheca_forresteri" id="mwFas" rel="mw:WikiLink" title="Aonchotheca forresteri">Aonchotheca forresteri</a></b></i> is known only from the <a href="./Marsh_rice_rat" id="mwFaw" rel="mw:WikiLink" title="Marsh rice rat">marsh rice rat</a>?