 Molecular analysis of the DNA sequences of the internal transcribed spacer ( IT ) region of S. thailandica showed that the species was part of the Boletineae , one of several lineages of Boletales recognized taxonomically at the level of suborder . The similarity between S. thailandica and S. squarepantsii was confirmed with molecular analysis , which showed a 98 % match between large subunit ribosomal DNA sequences of the two — a value typical of many species in the same genus of Boletaceae . Spongiforma is sister ( sharing a common ancestor ) to the genus Porphyrellus ; Spongiforma and Porphyrellus form a clade that is sister to Strobilomyces . All three genera are members of the Boletaceae family . 
