n class='op'>=</span> <span class='cn'>NULL</span>,
  startdepth <span class='op'>=</span> <span class='cn'>NULL</span>, enddepth <span class='op'>=</span> <span class='cn'>NULL</span>, geometry <span class='op'>=</span> <span class='cn'>NULL</span>, redlist <span class='op'>=</span> <span class='cn'>NULL</span>,
  hab <span class='op'>=</span> <span class='cn'>NULL</span>, exclude <span class='op'>=</span> <span class='cn'>NULL</span>, verbose <span class='op'>=</span> <span class='cn'>FALSE</span><span cl