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Beardfish

The beardfishes consist of a single extant genus, Polymixia, of deep-sea marine ray-finned fish named for their pair of long hyoid barbels. They are classified in their own order Polymixiiformes. But as Nelson says, "few groups have been shifted back and forth as frequently as this one, and they were recently added to Paracanthoptergii". For instance, they have previously been classified as belonging to the Beryciformes, and are presently considered either paracanthopterygians or the sister group to acanthopterygians. They are of little economic importance.

Classification
Order Polymixiiformes Rosen & Patterson, 1969 • Genus ?†Allocyclostoma Schwarzhans, Stringer & Welton, 2022 [otolith] • †S. beauryi (Schwarzhans, 2010) • †S. bourdoni Stringer & Schwarzhans, 2021 • Genus ?†Texoma Schwarzhans, Stringer & Welton, 2022 [otolith] • †C. alabamae Schwarzhans, Huddleston & Takeuchi, 2018 • †C. beauryi (Schwarzhans, 2010) • †C. carnevalei Schwarzhans & Stringer, 2020 • †C. groenlandicus (Schwarzhans, 2004) • †C. harderi (Schwarzhans, 2003) • †C. lamberi Schwarzhans, Huddleston & Takeuchi, 2018 • Genus †Homonotichthys Whitley 1933 • †H. dorsalis (Dixon 1850) [Homonotus dorsalis Dixon 1850] • †H. elegans (Dixon 1850) [Homonotus elegans Dixon 1850] • †H. rotundus (Woodward 1902) [Homonotus rotundus Woodward 1902] • Genus †Namicauda Schwarzhans, Ohe & Ando, 2017 [otolith] • †Namicauda pulvinata Schwarzhans, Ohe & Ando, 2017 • Genus †Omosoma Costa 1857 • †O. garretti Bardack 1976 • †O. pulchellum Davis 1887 • †O. sahelalmae Costa 1857 • †O. tselfatense Gaudant 1978 • Genus †Omosomopsis Gaudant 1978 • †Omosomopsis sima (Arambourg 1954) Gaudant 1978 • Genus †Parapolymixia David 1946 • †Parapolymixia californica David 1946 • Genus †Pycnosterinx Heckel 1849 [Imogaster Costa 1857] • †P. discoides Heckel 1849 • †P. dorsalis Pictet 1850 • †P. heckelii Pictet 1850 • †P. latus Davis 1887 • †P. russeggeri Heckel 1849 [Homonotus pulcher Davis 1886] • Genus Polymixia Lowe 1836 [Dinemus Poey 1860; Nemobrama Valenciennes 1860 non Jordan, Evermann & Clark 1930] • P. berndti Gilbert 1905 (Pacific beardfish) • P. busakhini Kotlyar 1993 (Busakhin's beardfish) • P. carmenae Caixeta, Oliveira & de Melo, 2024 (Brazilian beardfish) • P. hollisterae Grande & Wilson, 2021 (Bermuda beardfish) • P. japonica Günther 1877 (Silver eye) • P. longispina Deng, Xiong & Zhan 1983 [Polymixia kawadae Okamura & Ema 1985] • P. lowei Günther 1859 (Beardfish) • P. nobilis Lowe 1838 [Nemobrama webbii Valenciennes 1837; Dinemus venustus Poey 1860; Polymixia nobilis virginica Nichols & Firth 1936] (Stout beardfish) • †P. polita Schwarzhans 2012 [otolith] • P. salagomeziensis Kotlyar 1991 • P. sazonovi Kotlyar 1992 • P. yuri Kotlyar 1982'' • Genus †Polyspinatus Schrøder, Rasmussen, Møller & Carnevale, 2022 • †Polyspinatus fluere Schrøder, Rasmussen, Møller & Carnevale, 2022 • Family †Pycnosteroididae Patterson, 1964 • Genus †Magrebichthys Murray & Wilson 2014 • †Magrebichthys nelsoni Murray & Wilson 2014 • Genus †Pycnosteroides Woodward, 1942 • †Pycnosteroides levispinosus (Hay, 1903) ==References==
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