2.2. DNA sequencing and phylogenetic analyses
DNA was extracted using the Epmotion 5075 robot (Eppendorf).
Fragments of the COI and rDNA28S genes of 658 and 750 bp,
respectively, were amplified using the protocol described in
Kantor et al. (2013). PCR products were purified and sequenced
by Eurofins in both directions. Available COI and 28S sequences
for C. lividus, C. diadema and C. sanguinolentus in GenBank were