Myoxocephalus

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Myoxocephalus
Temporal range: Middle Miocene to present
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Possible Early Oligocene record
Myoxocephalus scorpius PAQ.jpg
Myoxocephalus scorpius
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Perciformes
Suborder: Cottoidei
Superfamily: Cottoidea
Family: Psychrolutidae
Genus: Myoxocephalus
Tilesius, 1811
Type species
Myoxocephalus stelleri
Tilesius, 1811
Synonyms [1]
  • Acanthocottus Girard, 1850
  • Ainocottus Jordan & Starks, 1904
  • Boreocottus Gill, 1859
  • Littocottus Neelov, 1979
  • Onchocottus Gill, 1861
  • Oncocottus Gill, 1862
  • Ptyonotus Günther, 1860
  • Triglopsis Girard, 1851

Myoxocephalus is a genus of marine ray-finned fishes belonging to the family Cottidae, the typical sculpins. They are found in the northern Pacific, Arctic and Atlantic Oceans, with a few species in lakes.

Contents

Taxonomy

Myoxocephalus was first proposed as a monospecific genus in 1811 by Tilesius when he described Myoxocephalus stelleri from Kamchatka. [1] [2] The 5th edition of Fishes of the World classifies this genus in the subfamily Cottinae of the family Cottidae [3] but other authorities classify it in the subfamily Myoxocephalinae of the family Psychrolutidae, [1] although others place the subfamily Myoxocephalinae within the Cottidae. [4]

Species

There are currently 14 recognized species in this genus: [5] [6]

In addition, the following fossil species are known:

Indeterminate remains of a marine Myoxocephalus are also known from the Middle Miocene-aged Kurasi Formation of Sakhalin, Russia. [11]

In 2020 workers undertook a comparison of the Mitochondrial DNA of the fourhorn sculpin and the belligerent sculpin (Megalcottus platycephalus) and found that the fourhorn sculpin was more closely related to the belligerent sculpin than it was to the other species in the genus Myoxocephalus, they proposed that the fourhorn sculpin be reclassified as a member of the genus Megalocottus. [12]

Characteristics

Myoxocephalus sculpins have a no scales above the lateral line, which lacks bony plates, on the body, which may be naked or have bony plates, scutes or small, sharp spines. The head is large and deep and has a covering of thick skin, there are no bony granulations on the head bit some species have warty knobs or skin flaps. The head has thin sensory canals. The upper spine on the preoperculum is elongated with a wide base and points diagonally upwards. The upper jaw clearly projects beyond the lower and there are vomerine teeth but no palatine teeth. There is always a slit behind d the fourth gill arch but this may be reduced to a pore. The spiny dorsal fin is slight larger or similar in size to the soft-rayed dorsal fin and they are connected. In males the pelvic fins typically bo not extend as far as the anus. The soft rays of the dorsal, anal and pectoral fins are simple. [13] These sculpins are relatively large, the largest species is the great sculpin with a maximum published total length of 80 cm (31 in) while the smallest is the grubby with a maximum published total length of 18 cm (7.1 in). [5]

Distribution and habitat

Myoxocephalus sculpins are found in the northern Pacific and Atlantic Oceans and the Arctic Ocean. [5] There are cases where they have become landlocked in lakes. [14] They are fishes of the coast and continental shelf and many species can tolerate low salinities and they are found over sand, mud or rocks. [13]

Biology

Myoxocephalus Sculpins are predators on fishes and benthic invertebrates. They spawn in winter and spring, laying demersal eggs which the males guard. [13]

Sources

  1. 1 2 3 Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Genera in the family Myoxocephalinae". Catalog of Fishes . California Academy of Sciences . Retrieved 2 February 2023.
  2. ↑ Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Species in the genus Myoxocephalus". Catalog of Fishes . California Academy of Sciences . Retrieved 3 February 2023.
  3. ↑ J. S. Nelson; T. C. Grande; M. V. H. Wilson (2016). Fishes of the World (5th ed.). Wiley. pp. 467–495. ISBN   978-1-118-34233-6.
  4. ↑ Olga A. Radchenko; Irina N. Moreva; Anna V. Petrovskaya (2021). "The subfamily Myoxocephalinae of cottid fishes (Cottidae): Genetic divergence and phylogenetic relationships". Journal of Fish Biology. 99 (6): 1857–1868. doi:10.1111/jfb.14886.
  5. 1 2 3 Froese, Rainer; Pauly, Daniel (eds.). "Species in genus Myoxocephalus". FishBase . August 2022 version.
  6. ↑ van der Land, Jacob (December 21, 2004). "Myoxocephalus Tilesius (ex Steller), 1811". WoRMS . Retrieved May 9, 2014.
  7. 1 2 Smith, Gerald R.; Kimmel, P. G. (1975). "Fishes of the Pliocene Glenns Ferry Formation, Southwest Idaho; Fishes of the Miocene - Pliocene Deer Butte Formation, Southeast Oregon Claude W. Hibbard Memorial". Papers on Paleontology. V (14): 1–87. hdl:2027.42/48614.
  8. ↑ Smith, Gerald R. (1987). "Fish Speciation in a Western North American Pliocene Rift Lake" . PALAIOS. 2 (5): 436–445. doi:10.2307/3514615. ISSN   0883-1351.
  9. ↑ De Schutter, Pieter J.; Everaert, Stijn; Gale, Andy; Van Remoortel, Walter; De Borger, Geert; Sakala, Jakub; Koutecký, Vít; Hoedemakers, Kristiaan (2023-08-01). "An exceptional concentration of marine fossils associated with wood-fall in the Terhagen Member (Boom Formation; Schelle, Belgium), Rupelian of the southern North Sea Basin". Geologica Belgica. 26 (1–2): 41–78. doi: 10.20341/gb.2023.003 . ISSN   1374-8505.
  10. ↑ Hoedemakers, Kristiaan; Schneider, Steffen (2016-03-01). "Fish otoliths from the Rupelian (Early Oligocene) of Bad Freienwalde (NE Germany)" . Paläontologische Zeitschrift. 90 (1): 125–144. doi:10.1007/s12542-015-0278-0. ISSN   1867-6812.
  11. ↑ Nazarkin, Mikhail V. (2021-10-01). "The Structure of the Miocene Northwestern Pacific Ichthyofauna as Revealed By Two Fossil Fish Assemblages From Sakhalin Island, Russia" . Paleontological Research. 25 (4). doi:10.2517/2021PR005. ISSN   1342-8144.
  12. ↑ Balakirev, Evgeniy; Kravchenko, Alexandra; and Semenchenko, Alexander (2020). "Genetic Evidence for a Mixed Composition of the Genus Myoxocephalus (Cottoidei: Cottidae) Necessitates Generic Realignment". Genes . 11 (9): 1071. doi: 10.3390/genes11091071 . PMC   7564937 . PMID   32933022.
  13. 1 2 3 J-C Huraeu (ed.). "Genus Myoxocephalus". Fishes of the North East Atlantic and Mediterranean. Naturalis Biodiversity Center Linnaeus NG. Retrieved 3 February 2023.
  14. ↑ Froese, Rainer; Pauly, Daniel (eds.). "Myoxocephalus quadricornis". FishBase . August 2022 version.
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