DNA extraction, amplification and sequencing. Total genomic DNA was extracted from ethanol preserved
tissues, following a CTAB-phenol-chloroform based protocol (Dawson et al. 1998; Dawson & Jacobs 2001).
Polymerase chain reactions (PCR) were performed in an Eppendorf Mastercycler Gradient thermal cycler.
Mitochondrial cytochrome c oxidase subunit I (COI) was amplified using the primers LCOjf (Dawson 2005) and
HCO2198 (Folmer et al. 1994) using the following profile: 94°C for 4 min, 51°C for 2 min, 72°C for 2 min, 94°C
for 4 min, 51°C for 2 min, 72°C for 2 min; 33 cycles of 94°C for 45 sec, 50°C for 45 sec, 72°C for 60 sec; final
extension at 72°C for 5 min and refrigeration at 4°C. 28S rDNA was amplified with the primers Aa_L28S_21 and
Aa_H28S_1078 (Bayha et al. 2010) using the reaction conditions suggested by the authors.
The size and quality of PCR products were examined on 1.5% agarose gels stained with GelRed™ and then
purified with DE-001 GEL/PCR extraction and purification kit (Fisher Molecular Biology). The purified products
were used as template DNA for cycle sequencing reactions performed by Macrogen (Korea). Both DNA strands
were sequenced