Fig. 4 in A huge undescribed diversity of the subgenus Hystricochaetonotus (Gastrotricha, Chaetonotidae, Chaetonotus) in Central Europe

Fig. 4. Histograms showing intra- and interspecies p-distances of four molecular markers studied in nine new gastrotrich species. A. Barcoding analysis of 18S rRNA gene sequences. The black arrow marks the overlap between intra- and interspecies p-distances. B. Barcoding analysis of ITS2 molecules. Sequences are identical within species (red arrow), while interspecies p-distances range from 5.88% to as much as 34.76%. C. Barcoding analysis of the first two domains of 28S rRNA gene. Although there is no overlap between intra- and interspecies p-distances, no distinct barcoding gap is recognizable. D. Barcoding analysis of COI showing the distinct gap between intra- and interspecies p-distances (red arrow).