Population genetics and comparative mitogenomic analyses reveal cryptic diversity of Amphioctopus neglectus (Cephalopoda: Octopodidae)

Descriptive study of the mitogenome of the diamondback squid ( Thysanoteuthis rhombus Troschel, 1857) and the evolution of mitogenome arrangement in oceanic squids

“…The rearranged genes in 13 PCGs were mainly cox3 , nad3 , and nad5 , and nad2 was highly conserved with no rearrangement. Previous studies reported that cox3 , nad3 , and nad5 are genes with high nucleotide diversity (Cheng et al, 2013; Tang et al, 2020), which accorded with our observations on rearranged genes and indicated that genomic rearrangements and sequence evolution are correlated, even if it is still unclear how (Xu et al, 2006).…”

Morphological description and mitochondrial DNA-based phylogenetic placement of a new species of Callistoctopus Taki, 1964 (Cephalopoda, Octopodidae) from the southeast waters of China

“…Octopus is one of the most species-rich cephalopod genera but was considered a 'catch-all' genus by Guzik et al (2005). It is not monophyletic in its current composition and needs revision and robust phylogenetic analyses (Strugnell et al 2005;Dai et al 2012;Amor et al 2015;Ritschard et al 2019;Tang et al 2020). In our study, species in Octopus were not clustered into one clade.…”

Incorporating evolutionary based tools in cephalopod fisheries management

“…Identity at the species level Cryptic species are common in many cephalopod groups (e.g. Bello 2019;Avendaño et al 2020;Fernández-Á lvarez et al 2020;Tang et al 2020;Xu et al 2020). Such morphologically similar species often differ in life history traits and phenology (such as age-at-maturation or spawning period), which are commonly used in stock assessment and management (Domínguez-Contreras et al 2018;Arkhipkin et al 2020).…”

“…Correct species identifications thus bear direct management consequences. To that end, regional or cooperative worldwide genomic analysis on the specific cephalopod species complex of interest could provide information on stocks taxonomic identity using even a limited number of samples per population (Tang et al 2020).…”