Number of putative species delimited by the different species delimitation methods applied to the COI dataset: overall barcoding gap analysis (OGA), pairwise gap analysis (PGA), 3% threshold, stylommatophoran 4% threshold, 10× rule, 3.2–4.1× rule, ABGD method, SDP (<i>Rosenberg’s P_AB</i>

+: MOTU supported as a putative species; −: no support as a putative species; empty cases: group is not suggested or cannot be analyzed by the method; parentheses: MOTU responsible for the absence of barcoding gap; *: additional MOTU defined by the COI data.