Is it possible to search for a range of taxa number?

[rdinnager]

On the Treebase web portal, it allows you to search for a range in the 'ntax' field using double dots. e.g. If you want all trees with more than 100 taxa, you would search for "100..", or for trees with between 10 and 20 taxa: "10..20".

When I try this using search_treebase, I get the following error:

    trees <- search_treebase("75..750", by="ntax", max_trees = 10)
    http://purl.org/phylo/treebase/phylows/matrix/find?query=tb.ntax.matrix=75..750&format=rss1&recordSchema=tree

    Extra content at the end of the document
    Error: 1: Extra content at the end of the document

Does treebase support ranges in ntax?