Nest architecture of Mycetosoritis hartmanni.

Statistics summarized are averages (± standard deviations) of chamber dimensions (width, height), estimated chamber volumes, and chamber depths from ground level of nests excavated between April—October 2000 at the Stengl Lost Pines Biological Station; in 2001–2006 in western Louisiana (LA) and eastern & central Texas (TX); and in 1903 in Austin Texas by Wheeler [15]. Garden chambers tend to be of ellipsoid shape, with width slightly exceeding height of a chamber. Incipient nests and 1-year-old nests had only one chamber, and the absence of any additional chambers in these nests is indicated by “–”. In some cases, only a single measurement was available for a nest category, so standard deviations could not be calculated, indicated by (± n/a). The complete dataset from which we calculated summary statistics of nest architecture is in Excel Sheet 3 in S1 Dataset.