The full mitochondrial genome sequence of the greater argonaut <i>Argonauta argo</i> (Cephalopoda, Argonautoidea) and its phylogenetic position in Octopodiformes

Hirota, Kazuki; Yoshida, Masa‐aki; Itoh, Takehiko; Toyoda, Atsushi; Setiamarga, Davin H. E.

doi:10.1080/23802359.2021.1911710

Cited by 5 publications

(4 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Meanwhile, another member of the cephalopods, the argonauts (Octopodiformes: Argonautidae) also have an external calcified shell. However, this shell is considered as not a “true” shell because it lacks the microstructures of one, brittle and most likely acquired secondarily from a shell-less Octopodiform ancestor during the evolution of this group [ 22 , 23 , 24 ].…”

Section: Introductionmentioning

confidence: 99%

Hydrophilic Shell Matrix Proteins of Nautilus pompilius and the Identification of a Core Set of Conchiferan Domains

Setiamarga

Hirota

Yoshida

et al. 2021

Genes

Self Cite

View full text Add to dashboard Cite

Despite being a member of the shelled mollusks (Conchiferans), most members of extant cephalopods have lost their external biomineralized shells, except for the basally diverging Nautilids. Here, we report the result of our study to identify major Shell Matrix Proteins and their domains in the Nautilid Nautilus pompilius, in order to gain a general insight into the evolution of Conchiferan Shell Matrix Proteins. In order to do so, we performed a multiomics study on the shell of N. pompilius, by conducting transcriptomics of its mantle tissue and proteomics of its shell matrix. Analyses of obtained data identified 61 distinct shell-specific sequences. Of the successfully annotated 27 sequences, protein domains were predicted in 19. Comparative analysis of Nautilus sequences with four Conchiferans for which Shell Matrix Protein data were available (the pacific oyster, the pearl oyster, the limpet and the Euhadra snail) revealed that three proteins and six protein domains were conserved in all Conchiferans. Interestingly, when the terrestrial Euhadra snail was excluded, another five proteins and six protein domains were found to be shared among the four marine Conchiferans. Phylogenetic analyses indicated that most of these proteins and domains were probably present in the ancestral Conchiferan, but employed in shell formation later and independently in most clades. Even though further studies utilizing deeper sequencing techniques to obtain genome and full-length sequences, and functional analyses, must be carried out in the future, our results here provide important pieces of information for the elucidation of the evolution of Conchiferan shells at the molecular level.

show abstract

Section: Introductionmentioning

confidence: 99%

Hydrophilic Shell Matrix Proteins of Nautilus pompilius and the Identification of a Core Set of Conchiferan Domains

Setiamarga

Hirota

Yoshida

et al. 2021

Genes

Self Cite

View full text Add to dashboard Cite

show abstract

“…In both cases, the sequences of closest relatives seem to have been obtained by Japanese specimens, but unfortunately referred to an unpublished study; therefore, it is difficult to provide accurate evaluations. Recently, the NGS Illumina HiSeq approach was applied to gain more insight into the taxonomic position and lifecycle of A. argo found in Japanese waters, through full mitochondrial genome sequencing [ 75 , 76 ]. However, to the best of our knowledge, no data on full A. argo genomes are available for Mediterranean individuals.…”

Section: Discussionmentioning

confidence: 99%

How Rare Are Argonautoidea Octopuses in the Mediterranean? New Data from Stranding Events, Stomach Contents and Genetics

Battaglia

Pedà

Rizzo

et al. 2023

Biology

View full text Add to dashboard Cite

The present paper represents the first all-encompassing study on all Mediterranean holopelagic octopods belonging to Argonautoidea (Argonauta argo, Ocythoe tuberculata, Tremoctopus gracilis, Tremoctopus violaceus). Argonautoidea octopuses were collected by different sampling methods in the Strait of Messina and southern Tyrrhenian Sea. The aim of this paper was to improve knowledge, using information from different data sources, such as the study of stranded individuals or accidental caught specimens, as well as the analysis of stomach content of large pelagic fishes. Moreover, we investigated their taxonomic profile through the amplification of the mitochondrial cytochrome c oxidase subunit I (COI). Overall, 47 fresh holopelagic octopods were collected, including valuable records of rare males. Moreover, 330 Argonautoidea octopuses were found in the stomachs of 800 predators. The results provided evidence that these cephalopods are more abundant than thought in the past. The molecular approach supported the ecological results with interesting insights. The similarity-based identifications and tree-based methods indicated that three females could be identified as Tremoctopus violaceus in agreement with their morphological classifications. The sequences obtained from the two T. gracilis individuals were clustered with the sequences of Tremoctopus violaceus from the Gulf of Mexico and were differentiated from the sequences attributed to T. gracilis and T. robsoni. The study represents a valuable contribution to the genetic characterization of Mediterranean individuals of the genera Tremoctopus, Argonauta and Ocythoe.

show abstract

“…It is a cosmopolitan species distributed in the global tropical and subtropical open seas ( Norman 2000 ). Phylogenetic analyses have placed Argonauta argo together with their congeners (e.g., Argonauta hians ), forming a monophyletic Argonautidae, which then forms a sister relationship with the blanket octopuses (e.g., Tremoctopus ), further forming the superfamily Argonautoidea ( Strugnell et al 2006 ; Sanchez et al 2018 ; Hirota et al 2021 ). Although the consensus phylogeny also suggested that Argonautoidea split from benthic ancestral octopods, members of the superfamily including Arg.…”

Section: Introductionmentioning

confidence: 99%

“…The argonaut Arg. argo , which is a member of the superfamily Argonautoidea together with the blanket octopus (Tremoctopodidae), forms a sister clade to suborder Incirrata, which includes benthic octopods ( Tanner et al 2017 ; Sanchez et al 2018 ; Hirota et al 2021 ). Therefore, the draft genome sequence of this species fills in the gaps of genomic information of the cephalopods, and thus allows discussions to be phylogenetically anchored.…”

Section: Introductionmentioning

confidence: 99%

Gene Recruitments and Dismissals in the Argonaut Genome Provide Insights into Pelagic Lifestyle Adaptation and Shell-like Eggcase Reacquisition

Yoshida

Hirota

Imoto

et al. 2022

Genome Biology and Evolution

Self Cite

View full text Add to dashboard Cite

The paper nautilus or greater argonaut, Argonauta argo, is a species of octopods which is characterized by its pelagic lifestyle and by the presence of a protective spiral-shaped shell-like eggcase in females. To reveal the genomic background of how the species adapted to the pelagic lifestyle and acquired its shell-like eggcase, we sequenced the draft genome of the species. The genome size was 1.1 Gb, which is the smallest among the cephalopods known to date, with the top 215 scaffolds (average length 5,064,479 bp) covering 81% (1.09 Gb) of the total assembly. A total of 26,433 protein-coding genes were predicted from 16,802 assembled scaffolds. From these, we identified nearly intact HOX, Parahox, Wnt clusters, and some gene clusters that could probably be related to the pelagic lifestyle, such as reflectin, tyrosinase, and opsin. The gene models also revealed several homologous genes related to calcified shell formation in Conchiferan mollusks, such as Pif-like, SOD, and TRX. Interestingly, comparative genomics analysis revealed that the homologous genes for such genes were also found in the genome of the shell-less octopus, as well as Nautilus, which has a true outer shell. Therefore, the draft genome sequence of A. argo presented here has helped us to gain further insights into the genetic background of the dynamic recruitment and dismissal of genes to form an important, converging extended phenotypic structure such as the shell and the shell-like eggcase. Additionally, it allows us to explore the evolution of from benthic to pelagic lifestyles in cephalopods and octopods.

show abstract

The full mitochondrial genome sequence of the greater argonaut Argonauta argo (Cephalopoda, Argonautoidea) and its phylogenetic position in Octopodiformes

Cited by 5 publications

References 16 publications

Hydrophilic Shell Matrix Proteins of Nautilus pompilius and the Identification of a Core Set of Conchiferan Domains

Hydrophilic Shell Matrix Proteins of Nautilus pompilius and the Identification of a Core Set of Conchiferan Domains

How Rare Are Argonautoidea Octopuses in the Mediterranean? New Data from Stranding Events, Stomach Contents and Genetics

Gene Recruitments and Dismissals in the Argonaut Genome Provide Insights into Pelagic Lifestyle Adaptation and Shell-like Eggcase Reacquisition

Contact Info

Product

Resources

About