Datasets: The trimmed data matrices and partition files shown in Table 2. P1P2R_Phylip.phy: Phylip formatted file for 1st and 2nd positions in nucleotide sequences of PCGs as separate partitions and two rRNAs used in ML analyses. P1P2R_partition.txt: Partition scheme for 1st and 2nd positions in nucleotide sequences of PCGs as separate partitions and two rRNAs. P12R_Phylip.phy: Phylip formatted file for the united 1st and 2nd positions in nucleotide sequences of PCGs and two rRNAs. P12R_partition.txt: Partition scheme for the united 1st and 2nd positions in nucleotide sequences of PCGs and two rRNAs. P2R_Phylip.phy: Phylip formatted file for 2nd positions in nucleotide sequences of PCGs and two rRNAs used in ML analyses. P2R_partition.txt: Partition scheme for 2nd positions in nucleotide sequences of PCGs and two rRNAs. AA_Phylip.phy: Phylip formatted file for the amino acid sequences of protein-coding genes (PCGs). AA_partition.txt: Partition scheme for the amino acid sequences of PCGs. Trees: The expanded consensus trees constructed by all data compositions, partition schemes, and models shown in Table 2. Directory (P1P2R) including the resulting the consensus trees tree for 1st and 2nd positions in nucleotide sequences of PCGs as separate partitions and two rRNAs. P1P2R_FP.tree: The consensus tree had edge-unlinked full partition(FP) scheme. P1P2R_MP.tree: The consensus tree had merged and edge-unlinked partition(MP) scheme. P1P2R_NP.tree: The consensus tree had unpartitioned(NP) scheme under TIM+F+R6. P1P2R_NPH4.tree: The consensus tree had NP scheme under TIM+F+H4. Directory (P12R) including the resulting the consensus trees tree for the united 1st and 2nd positions in nucleotide sequences of PCGs and two rRNAs. P12R_FP.tree: The consensus tree had FP scheme. P12R_MP.tree: The consensus tree had MP scheme. P12R_NP.tree: The consensus tree had NP scheme under GTR+F+R7. P12R_NPH4.tree: The consensus tree had NP scheme under GTR+F+H4. Directory (P2R) including the resulting the consensus trees tree for the united 1st and 2nd positions in nucleotide sequences of PCGs and two rRNAs. P2R_FP.tree: The consensus tree had FP scheme. P2R_MP.tree: The consensus tree had MP scheme. P2R_NP.tree: The consensus tree had NP scheme under GTR+F+R5. P2R_NPH4.tree: The consensus tree had NP scheme under GTR+F+H4. Directory (AA) including the resulting the consensus trees tree for the amino acid sequences of protein-coding genes showing ML bootstrap support from IQtree. AA_FP.tree: The consensus tree had FP scheme. AA_MP.tree: The consensus tree had MP scheme. AA_NP.tree: The consensus tree had NP scheme under mtART+F+R7. AA_NPC60.tree: The consensus tree had NP scheme under mtART+F+R7+C60. Tables S1-2.xlsx: Table S1: Pairwise similarity of nucleotide alignments between Creophilus maxillosus and the 92 sampled species in the Staphylinoidea. Table S2: Percentage of conserved sites in amino acid alignments between Creophilus maxillosus and the 92 sampled species in the Staphylinoidea. Data Use Statement. Data on genetic material contained in this paper are published for non-commercial use only. Utilization by third parties for purposes other than non-commercial scientific research may infringe the conditions under which the genetic resources were originally accessed, and should not be undertaken without obtaining consent from the corresponding author of the paper and/or obtaining permission from the original provider of the genetic material.