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Revision of the Generic Classification of “Long-Bodied” Opisthoproctids (Opisthoproctidae) with a Description of New Taxa and New Finds

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Abstract

The genera of “long-bodied” opisthoproctids, Bathylychnops, Ioichthys, Dolichopteryx, Dolichopteroides and the first described Duolentops gen. nov. (type species: D. minuscula), were revised. An overview of diagnostically significant characters was given and new diagnoses of the genera were compiled. The characteristics of a number of species (I. kashkini, D. minuscula, D. andriashevi, D. longipes, D. parini, D. pseudolongipes, D. trunovi, and D. vityazi) were specified. D. pseudolongipes was first discovered in the western Pacific Ocean. A new species, Dolichopteryx nigripes sp. nov., from the South Pacific was described. A new key for identification of the genera and species of “long-bodied” opisthoproctids has been compiled.

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Funding

The study of oceanic ichthyofauna and the comparative morphological analysis were carried out within the framework of the state assignment nos. 0149–2018–0009 and 0109–2018–0076, respectively; the study of ontogenetic variability and diagnostic significance of juvenile characters was supported by the Russian Science Foundation, grant no. 19–14–00026.

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  1. Institute of Ecology and Evolution, Russian Academy of Sciences (IEE RAS), Moscow, Russia

    A. M. Prokofiev

  2. Institute of Oceanology, Russian Academy of Sciences (IO RAS), Moscow, Russia

    A. M. Prokofiev

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  1. A. M. Prokofiev
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Correspondence to A. M. Prokofiev.

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Translated by S. Avodkova

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Prokofiev, A.M. Revision of the Generic Classification of “Long-Bodied” Opisthoproctids (Opisthoproctidae) with a Description of New Taxa and New Finds. J. Ichthyol. 60, 689–715 (2020). https://doi.org/10.1134/S0032945220050094

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