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Journal of Ichthyology

, Volume 59, Issue 4, pp 449–476 | Cite as

Materials for Revision of the Genus Photonectes (Melanostomiidae)

  • A. M. ProkofievEmail author
Article
  • 27 Downloads

Abstract—

Characters of external morphology of Melanostomiidae fishes of genus Photonectes are critically analyzed. The features previously used to distinguish the subgenera are shown to be unfit for these purposes. Existence of only two decisively diagnosed subgenera is proven within the genus, Trachinostomias and Photonectes s. str., for which the revised diagnoses are given based on the new set of characters. Species P. uncinatus is moved from subgenus Trachinostomias to the nominative subgenus. Reasons for the separation of groups of species within the nominative subgenus and the phylogenetic relationships between these groups are briefly discussed. Three new species are described: P. distichodon, P. filipendulus, and P. xenopogon spp. n. Distinguishing features of another new species that is not yet described due to the lack of data are presented. The key for identification of all known species of the genus is presented.

Keywords:

Melanostomiidae Photonectes external morphology classification subgeneric composition new species 

Notes

ACKNOWLEDGMENTS

I am grateful to J. Maclaine (British Museum of Natural History), K. Webb (British Museum of Natural History), and J. Nielsen (Zoological Museum, University of Copenhagen) for providing photographs and data on syntypes of P. dinema and P. leucopogon.

FUNDING

The study of species composition of ichthyofauna of the mesopelagic zone was performed within the framework of state assignment no. 0149-2018-0009 and was supported by the Russian Science Foundation (project no. 19-14-00026); the study of morphology and systematics of Melanostomiidae fishes was supported within the framework of state assignment no. 0109-2018-0076. The writing of the present article was partially supported by the Russian Foundation for Basic Research, project no. 18-04-00019.

COMPLIANCE WITH ETHICAL STANDARDS

Conflict of interest. The authors declare that they have no conflict of interest.

Statement on the welfare of animals. All applicable international, national, and/or institutional guidelines for the care and use of animals were followed.

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© Pleiades Publishing, Ltd. 2019

Authors and Affiliations

  1. 1.Severtsov Institute of Ecology and Evolution, Russian Academy of SciencesMoscowRussia
  2. 2.Shirshov Institute of Oceanology, Russian Academy of SciencesMoscowRussia

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