true only records that match known taxa (have a valid taxon ID) are
returned.</p></dd>


<dt id="arg-on-check-fail">on_check_fail<a class="anchor" aria-label="anchor" href="#arg-on-check-fail"></a></dt>
<dd><p>Character. What to do if a taxon is found not valid. One
of <code>"warn"</code> (default) or <code>"error"</code>.</p></dd>


<dt id="arg-tzone">tzone<a class="anchor" aria-label="anchor" href="#arg-tzone"></a></dt>
<dd><p>Character. If <code>date_time</code> has been selected the timezone of the
outp