Shallow water sea slugs (Gastropoda: Heterobranchia) from the northwestern coast of the Sea of Japan, north of Peter the Great Bay, Russia

Chichvarkhin, Anton

doi:10.7717/peerj.2774

Cited by 13 publications

(11 citation statements)

References 37 publications

(40 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, the presence of C. umiushi in Korean waters is described for the first time. The morphology of C. umiushi collected in the present study resembled that of other specimens described in previous studies (Chichvarkhin 2016;Korshunova et al 2020). Similar to those reports, the dorsum of C. umiushi in this study was broad with small yellow tubercles.…”

Section: Discussionsupporting

confidence: 90%

“…Even though there were slight differences in the number of denticles of the rachidian and the first lateral tooth, and in the ampulla compartments of specimens collected from South Korea compared to the specimens collected from Russia, other morphological characteristics are similar. It should be noted that this difference is also observed between specimens in Russia collected by Chichvarkhin (2016) and Korshunova et al (2020). The differences could be explained by the geographical distribution or maybe a different stage of development.…”

Section: Morphological Resultsmentioning

confidence: 75%

“…Also, there was a yellow mantle band on the specimens. The radula of specimens collected from Munamjin-ri, South Korea showed almost perfect resemblance with those of specimens described by Chichvarkhin (2016) and Korshunova et al (2020), except for slight differences in the radular formulae and the numbers of denticles in the rachidian and first lateral teeth ( Table 2). The radula formula (55 × 16.1.16) in this study was closer to the specimens from Chichvarkhin (2016) (55-60 × 13.1.13) than the specimen from Korshunova et al (2020) (70 × 30.1.30).…”

Section: Discussionmentioning

confidence: 75%

“…The reproductive systems were dissected under a stereoscopic microscope and drawn with a camera lucida. Morphological comparison and species descriptions were prepared following previous guidelines (Schrödl 2000;Chichvarkhin 2016;Korshunova et al 2020).…”

Section: Sample Collection and Morphological Examinationmentioning

confidence: 99%

See 3 more Smart Citations

A report of a new species and new record of Cadlina (Nudibranchia, Cadlinidae) from South Korea

Do¹,

Jung²,

Kil³

et al. 2020

View full text Add to dashboard Cite

Of the four species in the genus Cadlina present in the northwestern Pacific region, C. japonica has been the only species recorded from South Korea. For the purpose of investigating Cadlina in Korean waters, specimens were collected from the Korean East Sea (Sea of Japan) by scuba diving. The radula and morphology of these specimens were examined by stereoscopic and scanning electron microscopy. Based on morphology, three species were identified in Korean waters, including the new species, Cadlina koreanasp. nov., C. umiushi (first record in South Korea), and C. japonica. Cadlina koreanasp. nov. somewhat resembles C. umiushi but differs in both its morphology as well as the structure of its radula. The background color of Cadlina koreanasp. nov. is translucent white, tubercles on the dorsum are opaque white and the yellow marginal band is absent. The radular formula of Cadlina koreanasp. nov. is 57 × 23.1.23 with a rectangular rachidian tooth. In addition, mitochondrial cytochrome c subunit 1 (COI), 16S ribosomal RNA (16S rRNA), and nuclear 28S ribosomal RNA (28S rRNA) gene sequences were generated and used for analysis of Automatic Barcode Gap Discovery (ABGD) and reconstruction of the phylogenetic tree. Morphological distinction and genetic analyses confirm that three Cadlina species are present in Korean waters of which Cadlina koreana is a new species.

show abstract

Section: Discussionsupporting

confidence: 90%

Section: Morphological Resultsmentioning

confidence: 75%

Section: Discussionmentioning

confidence: 75%

Section: Sample Collection and Morphological Examinationmentioning

confidence: 99%

See 2 more Smart Citations

A report of a new species and new record of Cadlina (Nudibranchia, Cadlinidae) from South Korea

Do¹,

Jung²,

Kil³

et al. 2020

View full text Add to dashboard Cite

show abstract

“…In total, 179 L. helicina sequences from the Arctic and Pacific were downloaded from GenBank ( Table 1 ). These sequences were regarded as three large geographical subgroups: the Kara Sea, Svalbard (data from Sromek, Lasota & Wolowicz, 2015 ), and the Pacific ( Jennings et al, 2010 ; Chichvarkhin, 2016 ; Shimizu et al, 2017 ). We also added the data from the Canadian Arctic ( Hunt et al, 2010 ; Jennings et al, 2010 ; Layton, Martel & Hebert, 2014 ) for the haplotype network construction.…”

Section: Resultsmentioning

confidence: 99%

Genetic population structure of the pelagic mollusk Limacina helicina in the Kara Sea

Abyzova

Никитин

Popova

et al. 2018

PeerJ

View full text Add to dashboard Cite

BackgroundPelagic pteropods Limacina helicina are widespread and can play an important role in the food webs and in biosedimentation in Arctic and Subarctic ecosystems. Previous publications have shown differences in the genetic structure of populations of L. helicina from populations found in the Pacific Ocean and Svalbard area. Currently, there are no data on the genetic structure of L. helicina populations in the seas of the Siberian Arctic. We assessed the genetic structure of L. helicina from the Kara Sea populations and compared them with samples from around Svalbard and the North Pacific.MethodsWe examined genetic differences in L. helicina from three different locations in the Kara Sea via analysis of a fragment of the mitochondrial gene COI. We also compared a subset of samples with L. helicina from previous studies to find connections between populations from the Atlantic and Pacific Oceans.Results65 individual L. helinica from the Kara Sea were sequenced to produce 19 different haplotypes. This is comparable with numbers of haplotypes found in Svalbard and Pacific samples (24 and 25, respectively). Haplotypes from different locations sampled around the Arctic and Subarctic were combined into two different groups: H1 and H2. The H2 includes sequences from the Kara Sea and Svalbard, was present only in the Atlantic sector of the Arctic. The other genetic group, H1, is widespread and found throughout all L. helicina populations. ϕ ST analyses also indicated significant genetic difference between the Atlantic and Pacific regions, but no differences between Svalbard and the Kara Sea.DiscussionThe obtained results support our hypothesis about genetic similarity of L. helicina populations from the Kara Sea and Svalbard: the majority of haplotypes belongs to the haplotype group H2, with the H1 group representing a minority of the haplotypes present. In contrast, in the Canadian Arctic and the Pacific Ocean only haplogroup H1 is found. The negative values of Fu’s Fs indicate directed selection or expansion of the population. The reason for this pattern could be an isolation of the Limacina helicina population during the Pleistocene glaciation and a subsequent rapid expansion of this species after the last glacial maximum.

show abstract

Drilling in the dorid species Vayssierea cf. elegans (Gastropoda: Nudibranchia): Functional and comparative morphological aspects

Mikhlina

Tzetlin

Ekimova

et al. 2018

Journal of Morphology

View full text Add to dashboard Cite

The drilling mode of feeding is known from two clades of Gastropoda: Caenogastropoda and Heterobranchia. However, the level of convergence and parallelism or homology among these two lineages is unclear. The morphology of the buccal complex is well studied for drilling caenogastropods, but poorly known for drilling nudibranchs. It is also unclear whether the drilling feeding mechanism is similar between inside gastropods. Accordingly, a comparison between the feeding mechanisms of drilling nudibranchs and caenogastropods can help to understand the evolutional trends inside gastropods. In this study, we redescribe the morphology of the buccal complex of drilling dorid nudibranch Vayssierea cf. elegans, and compare it to that of previous investigations on this species and closely related dorid species. We describe the feeding mechanism of this species based on the obtained morphological and literature data and compare it to the feeding mechanisms described for drilling caenogastropods. The feeding apparatus of Vayssierea cf. elegans corresponds to the general morphology of the dorid buccal complex; that is, it has a similar arrangement of the buccal musculature and pattern of radular morphology. However, there are also adaptations to the drilling feeding mode similar to those found in Caenogastropoda: that is, specialized dissolving glands and lateral teeth with elongated pointed cusps; and even Sacoglossa: the specialized muscle for sucking. The feeding process of Vayssierea cf. elegans includes the same two stages as those described for drilling caenogastropods: (a) the boring stage, which is provided by mechanical and chemical activity, and (b) the swallowing stage.

show abstract

Shallow water sea slugs (Gastropoda: Heterobranchia) from the northwestern coast of the Sea of Japan, north of Peter the Great Bay, Russia

Cited by 13 publications

References 37 publications

A report of a new species and new record of Cadlina (Nudibranchia, Cadlinidae) from South Korea

A report of a new species and new record of Cadlina (Nudibranchia, Cadlinidae) from South Korea

Genetic population structure of the pelagic mollusk Limacina helicina in the Kara Sea

Drilling in the dorid species Vayssierea cf. elegans (Gastropoda: Nudibranchia): Functional and comparative morphological aspects

Contact Info

Product

Resources

About