THE COMPLETE MITOCHONDRIAL GENOME OF JONAS DISTINCTUS(BRACHYURA:CORYSTIDAE)AND ITS PHYLOGENETIC STATUS
Carcinization is a significant morphological innovation in the evolutionary history of arthropods,particularly within Brachyura.However,few species own apparent decarcinization traits,deviating significantly from the typical crab morphology.Corystoidea species serve as a representative example of decarcinization in Brachyura,while the evolutionary status of this group is still unclear.The complete mitochondrial genome(mitogenome)can provide important molecular information for revealing phylogenetic relationships.The complete mitogenome of Jonas distinctus(Brachyura,Corystidae)was sequenced and analyzed.The 16 038-bp mitogenome contains the entire set of 37 genes and a long non-coding region(CR).Compared to the ancestral mitogenomes of Brachyura,this mitogenome exhibits significant gene rearrangements.The gene order of CR,ND2,and six tRNA genes(I,Q,M,W,C,and Y)differed from those that have reported,indicating a completely new type of gene arrangement.The phylogenetic relationships based on 13 PCGs were constructed.Both Bayesian inference(BI)and maximum likelihood(ML)trees demonstrate that Corystidae is the closest relative to Parthenopidae.Conversely,the Raninoidea group(e.g,Raninidae and Lyreididae),capturing the same decarcinization traits,had a relatively distant relationship with Corystidae.This phylogenetic relationship indicates that the unique decarcinization phenomenon in Brachyura species had evolved independently several times.This study enhanced our understanding of mitochondrial gene rearrangement and revealed the evolutionary position of Corystidae among Brachyura,as well as provided data for the classification and evolutionary origin of Brachyura.
BrachyuraCorystidaemitogenomegene rearrangementtandem duplication and random lossphylogenetic analysis
万方数据
维普
