Nudibranch molluscs of the genus Dendronotus Alder et Hancock, 1845 (Heterobranchia: Dendronotina) from Northwestern Sea of Japan with description of a new species

Ekimova I.; D. Schepetov; Chichvarkhina O.; Chichvarkhin A.

doi:10.15298/invertzool.13.1.02

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Nudibranch molluscs of the genus Dendronotus Alder et Hancock, 1845 (Heterobranchia: Dendronotina) from Northwestern Sea of Japan with description of a new species

Invertebrate Zoology. 2016. Vol. 13. No. 1. P. 15–42.

Ekimova I., Schepetov D., Chichvarkhina O., Chichvarkhin A.

Species of the genus Dendronotus are among the most common nudibranchs in the northern Hemisphere. However, their distribution and composition in the North-west Pacific remain poorly explored. In the present study, we observed Dendronotus composition in northwestern part of the Sea of Japan, using an integrative approach, included morphological and molecular phylogenetic analyses and molecular species delimitation methods. These multiple methods revealed high cryptic diversity within the genus. Two specimens of Dendronotus frondosus were found in Amursky Bay and therefore its amphiboreal status was confirmed. In three locations of the Sea of Japan we found specimens, which are very close externally to D. frondosus, but show significant distance according to molecular analysis. We show that these specimens belong to a new species Dendronotus dudkai sp.n. This species is sister to D. frondosus according to morphological and molecular data, therefore the question of sympatric coexistence is discussed. For the first time Dendronotus kamchaticus was registered in the Sea of Japan and updated information of some intraspecific variation of this species is provided.

Language: English

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Keywords: Taxonomy Systematics

Roles of Different Artifacts in Enterprise Architecture Practice: An Exploratory Study

Kotusev S., Kurnia S., Dilnutt R., , in: Proceedings of the 41st International Conference on Information SystemsVol. 41.: Association for Information Systems, 2020. P. 1–17.

Added: December 17, 2020

Meloscaphander grandis (Heterobranchia: Cephalaspidea), a deep-water species from the North Pacific: redescription and taxonomic remarks

Chaban E., Ekimova I., Schepetov D. et al., Zootaxa 2019 Vol. 4646 No. 2 P. 385–400

Meloscaphander grandis is a little-known species missing from databases and papers on taxonomic revision and phylogenetic analysis of Scaphandridae. This species is redescribed herein, based on the type specimen and specimens from the abyssal plain adjacent to the Kuril-Kamchatka Trench. A phylogenetic analysis of COI, 16S, and 28S markers show M. grandis to nest within ...

Added: October 31, 2019

Euopisthobranch mollusks of the order Cephalaspidea (Gastropoda: Heterobranchia) of the Kuril-Kamchatka Trench and the adjacent Pacific abyssal plain with descriptions of three new species of the genus Spiraphiline (Philinidae)

Chaban E., Ekimova I., Schepetov D. et al., Progress in Oceanography 2019 Vol. 178 P. 1–14

Our study focuses on the distribution and diversity of different cephalaspidean species collected from the Kuril-Kamchatka Trench (KKT) during the deep-sea expeditions KuramBioI (2012), SokhoBio (2015) and KuramBioII (2016). Our study recovered several undescribed taxa from different parts of the KKT and the adjacent abyssal plain, belonging to four families: Cylichnidae s. l., Scaphandridae, Aglajidae ...

Added: October 31, 2019

When molecules support morphology: Phylogenetic reconstruction of the family Onuphidae (Eunicida, Annelida) based on 16S rDNA and 18S rDNA.

Budaeva N., Schepetov D., Zanol J. et al., Molecular Phylogenetics and Evolution 2016 Vol. 94 No. B P. 791–801

Onuphid polychaetes are tubicolous marine worms commonly reported worldwide from intertidal areas to hadal depths. They often dominate in benthic communities and have economic importance in aquaculture and recreational fishing. Here we report the phylogeny of the family Onuphidae based on the combined analyses of nuclear (18S rDNA) and mitochondrial (16S rDNA) genes. Results of ...

Added: October 14, 2016

Was Gordon Robilliard right? Integrative systematics suggests that Dendronotus diversicolor Robilliard, 1970 is a valid species

Ekimova I., Valdés Á., Schepetov D. et al., Canadian Journal of Zoology 2016 Vol. 0 No. ja

Nudibranch molluscs of the genus Dendronotus Alder and Hancock, 1845 are widely distributed in the Northern Hemisphere. Taxonomic studies on the genus Dendronotus have been problematic due to high variability in colour pattern in many species, as well as in external morphology and anatomy. In the present paper, we studied specimens of Dendronotus from northern ...

Added: October 14, 2016

Towards a Unified Taxonomy of Biclustering Methods

Ignatov D. I., Watson B., , in: RuZA 2015 Workshop. Proceedings of Russian and South African Workshop on Knowledge Discovery Techniques Based on Formal Concept Analysis (RuZA 2015). November 30 - December 5, 2015, Stellenbosch, South AfricaVol. 1552.: Aachen: CEUR Workshop Proceedings, 2015.

Being an unsupervised machine learning and data mining technique, biclustering and its multimodal extensions are becoming popular tools for analysing object-attribute data in different domains. Apart from conventional clustering techniques, biclustering is searching for homogeneous groups of objects while keeping their common description, e.g., in binary setting, their shared attributes. In bioinformatics, biclustering is used ...

Added: June 14, 2016

Integrative systematics of northern and Arctic nudibranchs of the genus Dendronotus (Mollusca, Gastropoda), with descriptions of three new species.

Ekimova I., Korshunova T., Schepetov D. et al., Zoological Journal of the Linnean Society 2015 Vol. 173 No. 4 P. 841–886

The taxonomy of common northern nudibranch molluscs of the genus Dendronotus in the vast cold regions of Eurasia remains largely unknown. Abundant material collected in many localities from the Barents Sea, via the Arctic region, to the north-west Pacific was analysed for the first time. An integrated approach combining morphological and ontogenetic data with molecular ...

Added: October 11, 2015

Morphological characterization and molecular phylogeny of Portunoidea Rafinesque, 1815 (Crustacea Brachyura): Implications for understanding evolution of swimming capacity and revision of the family-level classification

Spiridonov V., Neretina T., Dmitriy Schepetov, 2014 No. 253 P. 404–429

Cheliped construction, in particular the teeth pattern on chelae fingers is considered as most important character suit (along with burrowing/swimming apparatus) for the diagnosis of Portunoidea. Heterochelic and heterodontic chelipeds with the molariform tooth in the larger chela and multi-lobed serial teeth are presumably ancestral and most common pattern for the group. New material (mostly ...

Added: October 14, 2014

Transnational employment relations from a legal scholar's viewpoint: terminological and taxonomic issues

Daria V. Chernyaeva, , in: Labour Law in Russia: Recent Developments and New Challenges.Issue 6.: Newcastle upon Tyne: Cambridge Scholars Publishing, 2014. P. 157–181.

This paper offers an outline of the perception of “transnational employment relations”[1] in a legal context. It will analyse various doctrinal and legislative approaches to the definition of the phenomenon, as well as the usage of the terms employed in its naming, its key characteristics and classifications. The author will reveal and explore the reasons ...

Added: February 12, 2014

Автоматизация анализа контента деятельности в задачах управления и оптимизации бизнес-процессов

Gromoff A., Komarov V. V., Лещанкина Е. Н., Информационные технологии в проектировании и производстве 2009 № 2 С. 19–23

Any company consists of business processes, and enterprise management is actually performed by managing them. Every process requires proper information support and cannot be managed successfully without it, hence neither can the whole company. However creating such support system is quite a serious problem. Content analysis based on corporative taxonomies use is a simple but ...

Added: February 10, 2013

Abstracting concepts from text documents by using an ontology

Artemova E., Чугунова О. Н., Аскарова Ю. А. et al., , in: CDUD – 2010: International Workshop on Concept Discovery in Unstructured Data.: M.: Higher School of Economics Publishing House, 2011. P. 20–31.

A method for computationally visualizing and interpreting a text or corpus of texts in a taxonomy of the field is described. The method involves such stages as matching taxonomy topics and text(s) by using annotated suffix trees (ASTs), combining multiple information such as text abstracts, key-words and taxonomy cross-references, building clusters of taxonomy topics and their profiles, and lifting ...

Added: December 27, 2012