Super Long Introns of Euarchontoglires

There was another weird result I got about my exon/intron boundaries analysis research. To less diverse species’ genes, intron lengths are shown to increase. However, according to my findings, at a point of Euarchontoglires or Supraprimates, this increase is very sharp and seems unexpected. So, I looked at exon/intron length each gene in each taxonomic rank and try to see what makes Euarchontoglires genes with that long introns. As you see in the graph above, Euarchontoglires introns are very long compared to the rest.