Molecular evidence for synonymy of the genera Moroteuthis and Onykia and identification of their paralarvae from northern Hawaiian waters

  title={Molecular evidence for synonymy of the genera Moroteuthis and Onykia and identification of their paralarvae from northern Hawaiian waters},
  author={Toshie Wakabayashi and Tsunemi Kubodera and Mitsuo Sakai and Taro Ichii and Seinen Chow},
  journal={Journal of the Marine Biological Association of the United Kingdom},
  pages={959 - 965}
It has been claimed that most squid species in the genus Onykia may be immature stages of species in the genus Moroteuthis. To evaluate the generic status of Moroteuthis and Onykia and to identify paralarvae collected in northern Hawaiian waters, we performed morphological investigation and nucleotide sequence analysis of the mitochondrial cytochrome oxidase I (COI) gene. Of 42 Onykia paralarvae (1.8–8.5 mm dorsal mantle length, DML) examined, 41 had a nucleotide sequence identical to that of M… 

A mitochondrial phylogeny of the family Onychoteuthidae Gray, 1847 (Cephalopoda: Oegopsida)

Results support monophyly for the family and all seven onychoteuthid genera (including Moroteuthopsis, established herein as the senior genus name for species formerly attributed to Kondakovia); 29 genetically distinct species were recovered, with the BIN analysis for COI showing good congruence overall with morphological species groupings.

Systematics of the Onychoteuthidae Gray, 1847 (Cephalopoda: Oegopsida)

A global revision of the Onychoteuthidae, based on ~1500 specimens examined from 19 repositories, suggests a more distant relationship between Onykia and the species ‘Moroteuthis’ knipovitchi Filippova and neotypes are also designated.

Stock identification and spawning depth of oval squid Sepioteuthis spp. in Tanega-shima Island inferred by DNA markers

Stock identification of oval squid Sepioteuthis spp. in the coastal waters of Tanega-shima Island were examined using ten polymorphic microsatellite loci and partial nucleotide sequences of

Systematics of Cephalopods

Cephalopoda is an extremely diverse class of mollusks that has been evolving since the Cambrian and diverged into Nautiloidea and Coleoidea in the mid-Palaeozoic; the relationships among orders of Decapodiformes are not well understood, and molecular systematics has failed to provide much resolution.

A second species of the squid genus Kondakovia (Cephalopoda: Onychoteuthidae) from the sub-Antarctic

A new species of squid, Kondakovia nigmatullini, is described based on two specimens from sub-Antarctic waters of the Southwest Atlantic. The new species is characterised by short, broad, rhombic

A review of Southern Ocean squids using nets and beaks

  • Y. Cherel
  • Environmental Science
    Marine Biodiversity
  • 2020
This review presents an innovative approach to investigate the teuthofauna from the Southern Ocean by combining two complementary data sets, the literature on cephalopod taxonomy and biogeography,

The contribution of molecular data to our understanding of cephalopod evolution and systematics: a review

Although much knowledge has been gained over the past 20 years, deeper-level relationships are still not well understood and there is still much scope for further research in this field.

‘Tailed’ cephalopods

The anatomy and development of the tails at the posterior part of the mantle were studied in several groups of Recent and extinct coleoid cephalopods; substantial differences in their formation were



A phylogenetic study of the squid family Onychoteuthidae (Cephalopoda: Oegopsida)

On a molecular basis, the Onychoteuthidae appeared to be monophyletic, and the newly created species of Onykia is clearly different from all the others, indicating that it is a true species.


It is clarified that two well-known nominal species, Onychoteuthis banksii and Ancistroteuthis lichtensteinii (Ferussac and Orbigny, 1839) both represent species complexes in their broad distributional ranges.

Identification of ommastrephid squid paralarvae collected in northern Hawaiian waters and phylogenetic implications for the family Ommastrephidae using mtDNA analysis

Although the phylogenetic relationships among genera were not resolved well due to apparent homoplasy and large genetic divergence between species, COI sequence data without transitions provided support for subfamily level relationships.

Phylogeny and historical biogeography of the loliginid squids (Mollusca: cephalopoda) based on mitochondrial DNA sequence data.

  • F. Anderson
  • Biology, Environmental Science
    Molecular phylogenetics and evolution
  • 2000
Tests of alternative hypotheses of loliginid cladogenesis suggest that cladogenesis within Loliginidae is correlated with the widening of the Atlantic and the closure of the Tethys Sea, although dispersal from the Indo-West Pacific is a reasonable explanation for the origin of the clade of American lolig inines.

A combined approach to the phylogeny of Cephalopoda (Mollusca)

This study provides a comprehensive phylogenetic analysis of Cephalopoda (Mollusca) using a combination of molecular and morphological data, finding Vampyromorpha formed the sister group to Decabrachia under the majority of parameters.

Phylogenetic analysis of cytochrome c oxidase I sequences to determine higher-level relationships within the coleoid cephalopods

This study analyzed a 657 base pair portion of the mitochondrial cytochrome c oxidase I (COI) gene from 48 cephalopod species representing a broad spectrum of coleoid diversity to examine higher-level phylogenetic relationships within the group.

Cephalopod paralarvae assemblages in Hawaiian Islands waters

The distribution and abundance of cephalopod paralarvae near the Hawaiian Islands are described and 15 'island-associated' species showed increasedParalarval abundance near the islands, suggesting preferential spawning in this area.

Descriptions of Eucleoteuthis luminosa (Sasaki, 1915) and Ornithoteuthis volatilis (Sasaki, 1915) paralarvae in the northwestern Pacific

Both E. luminosa and Ornithoteuthis volatilis paralarvae are described from waters off the Ogasawara Islands and from off Shikoku to the Philippine Sea.


The possibility exists that the times and places of spawning, and the developmental history of many species, may be determined from zooplankton surveys, which presupposes that a sufficiently extensive area is surveyed and that the sampling is intensive in both space and time.


The development of the protective membranes and the relatively long arms in the postlarval stage may be adaptations for floating in ocean currents rather than for active swimming, and suggest that T. rhombus might have a long planktonic phase.