Argonauta_hians.v2.0.chromosome.fasta

Here we provide a draft genome assembly of the vampire squid <i>Vampyroteuthis</i> sp., the largest cephalopod genome sequenced to-date (over 10 gigabasepairs). Through syntenic comparisons, we infer that this basally branching octopodiform species<i> </i>has a chromosomal complement resembling that of the decapodiforms, indicating its more ancestral state and a derived nature of the octopod karyotype. Together with the analysis of a new chromosome-level assembly of a pelagic octopod, <i>Argonauta hians</i>, we identified irreversible chromosomal fusion-with-mixing events followed by inter-chromosomal translocations in octopods after their separation from the vampire squid lineage. Our results have broad implications for identifying the general patterns of chromosomal evolution after large rearrangement events in animal genomes.