Sebastolobus

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Sebastolobus
Sebastolobus altivelis.jpg
Longspine thornyhead (S. altivelis)
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Scorpaeniformes
Family: Scorpaenidae
Subfamily: Sebastinae
Tribe: Sebastolobini
Genus: Sebastolobus
T. N. Gill, 1881
Type species
Sebastes macrochir
Günther, 1877 [1]

Sebastolobus, the thornyheads, is a genus of marine ray-finned fish belonging to the subfamily Sebastinae, the rockfishes, part of the family Scorpaenidae. These fishes are native to the northern and eastern Pacific Ocean. They are generally found in deep waters.

Contents

Taxonomy

Sebastolobus was first described as a genus by the American ichthyologist Theodore Gill in 1881 with Sebastes macrochir, a species described, with its type locality given as Japan, by the German-born British ichthyologist and herpetologist Albert Gunther in 1877. [1] It is the type genus of the tribe Sebastolobini, one of two in the Sebastinae, a subfamily of the family Scorpaenidae. [2] The generic name is a compound of Sebastes , the original genus of the type species, and lobus, “lobed”, a reference to the lower rays of the pectoral fins being widened into tongue-shaped lobes. [3]

Species

There are currently three recognized species in this genus: [4]

ImageScientific nameCommon NameDistribution
Sebastolobus alascanus.jpeg Sebastolobus alascanus T. H. Bean, 1890Shortspine thornyheadPacific Ocean and is known from Canada, Alaska and the Russian Federation.
Longspine thornyhead rockfish.jpg Sebastolobus altivelis C. H. Gilbert, 1896Longspine thornyheadPacific Ocean and is found from the Aleutian Islands, Alaska to southern Baja California, Mexico.
Sebastolobus macrochir noboribetsu.jpg Sebastolobus macrochir (Günther, 1877)Broadbanded thornyheadSagami Bay, Japan to the southern Kuril Islands and off Sakhalin, Russia

Characteristics

Sebastolobus thornyheads have moderately compressed bodies with relatively large head armed with 8 pairs of robust spines along its top. The eyes are large and there is a horizontal suborbital ridge which is armed with another 8-10 strong spines. They have a large number of conical teeth on the jaws with teeth on the roof of the mouth too. The single dorsal fin is incised to the rear of the spiny part. There are 15 to 17 robust and venom bearing spines in the dorsal fin, followed by between 8 and 11 soft rays. The anal fin has 3 spines and between 4 and 6 soft rays. The caudal fin is straight edged. [5] These species have maximum lengths which vary from 39 cm (15 in) total length in S. altevelis up to a standard length 80 cm (31 in) in S. alascanus. [4]

Distribution and habitat

Sebastolobus thornyheads are found in the northern Pacific Ocean in both the eastern and western parts with vagrants extending as far south as Costa Rica. [5] They are demersal fishes which are found over soft substrates. [4]

Biology

Sebastolobus thornyheads are oviparous, unlike the rockfishes in the genus Sebastes and the females extrude gelatinous egg masses. [4]

Related Research Articles

<span class="mw-page-title-main">Sebastinae</span> Subfamily of fishes

Sebastinae is a subfamily of marine fish belonging to the family Scorpaenidae in the order Scorpaeniformes. Their common names include rockfishes, rock perches, ocean perches, sea perches, thornyheads, scorpionfishes, sea ruffes and rockcods. Despite the latter name, they are not closely related to the cods in the genus Gadus, nor the rock cod, Lotella rhacina.

<span class="mw-page-title-main">Treefish</span> Species of fish

The treefish is a species of marine ray-finned fish belonging to the subfamily Sebastinae, the rockfishes, part of the family Scorpaenidae. It is native to the eastern Pacific Ocean.

<span class="mw-page-title-main">Shortspine thornyhead</span> Species of fish

The shortspine thornyhead, also known as the channel rockcod, shortspine channel rockfish or spinycheek rockfish, is a species of marine ray-finned fish belonging to the subfamily Sebastinae, the rockfishes, part of the family Scorpaenidae. It is sometimes referred to as the "idiot fish" or "idiot cod" due to its large oversized head and eyes. It is found in the northern and northeastern Pacific Ocean.

<span class="mw-page-title-main">Pygmy rockfish</span> Species of fish

The pygmy rockfish, also known as the slender rockfish or Wilson's rockfish, is a species of marine ray-finned fish belonging to the subfamily Sebastinae, the rockfishes, part of the family Scorpaenidae. It is found in the eastern Pacific Ocean.

<i>Adelosebastes</i> Genus of fishes

Adelosebastes is a monotypic genus of marine ray-finned fish belonging to the subfamily Sebastinae, the rockfishes, part of the family Scorpaenidae. The only species in this genus is Adelosebastes latens, the Aleutian scorpionfish. It is found in the northern Pacific Ocean.

<i>Trachyscorpia</i> Genus of fishes

Trachyscorpia is a genus of marine ray-finned fish belonging to the subfamily Sebastinae, the rockfishes, part of the family Scorpaenidae. The species in this genus are found in the Atlantic, Indian and Pacific oceans.

<i>Sebastes rufinanus</i> Species of fish

Sebastes rufinanus, the dwarf-red rockfish, is a species of marine ray-finned fish belonging to the subfamily Sebastinae, the rockfishes, part of the family Scorpaenidae. It is found in the Eastern Pacific, in tock habitats off islands in southern California.

<i>Sebastes aurora</i> Species of fish

Sebastes aurora, the aurora rockfish, is a species of marine ray-finned fish belonging to the subfamily Sebastinae, the rockfishes, part of the family Scorpaenidae. It is found in the northeastern Pacific Ocean.

<i>Sebastes diploproa</i> Species of fish

Sebastes diploproa, the splitnose rockfish, is a species of marine ray-finned fish belonging to the subfamily Sebastinae, the rockfishes, part of the family Scorpaenidae. It is found in the northeastern Pacific Ocean.

<i>Sebastes ensifer</i> Species of fish

Sebastes ensifer, the swordspine rockfish, is a species of marine ray-finned fish belonging to the subfamily Sebastinae, the rockfishes, part of the family Scorpaenidae. It is found in the northeastern Pacific Ocean.

<i>Sebastes helvomaculatus</i> Species of fish

Sebastes helvomaculatus, the rosethorn rockfish, is a species of marine ray-finned fish belonging to the subfamily Sebastinae, the rockfishes, part of the family Scorpaenidae. This species is found in the Eastern Pacific.

<i>Sebastes hopkinsi</i> Species of fish

Sebastes hopkinsi, the squarespot rockfish, is a species of marine ray-finned fish belonging to the subfamily Sebastinae, the rockfishes, part of the family Scorpaenidae. This species is found in the Eastern Pacific.

<i>Sebastes joyneri</i> Species of fish

Sebastes joyneri, the Togot seaperch, offshore seaperch or joyner stingfish, is a species of marine ray-finned fish belonging to the subfamily Sebastinae, the rockfishes, part of the family Scorpaenidae. It is found in the northwestern Pacific Ocean.

<i>Sebastes ovalis</i> Species of fish

Sebastes ovalis, the speckled rockfish, is a species of marine ray-finned fish belonging to the subfamily Sebastinae, the rockfishes, part of the family Scorpaenidae. It is found in deep rocky areas of the Eastern Pacific.

<i>Sebastes rubrivinctus</i> Species of fish

Sebastes rubrivinctus, also known as the flag rockfish, Spanish flag, redbanded rockfish or barberpole, is a species of marine ray-finned fish belonging to the subfamily Sebastinae, the rockfishes, part of the family Scorpaenidae. It is found in the Eastern Pacific.

<i>Sebastes semicinctus</i> Species of fish

Sebastes semicinctus, the halfbanded rockfish, is a species of marine ray-finned fish belonging to the subfamily Sebastinae, the rockfishes, part of the family Scorpaenidae. It is found in the Eastern Pacific.

<i>Sebastes melanostictus</i> Species of fish

Sebastes melanostictus, the blackspotted rockfish, is a species of marine ray-finned fish belonging to the subfamily Sebastinae, the rockfishes, part of the family Scorpaenidae. It is found in the northern Pacific Ocean.

<i>Sebastolobus altivelis</i> Species of fish

Sebastolobus altivelis, the longspine thornyhead, is a species of marine ray-finned fish belonging to the subfamily Sebastinae, the rockfishes, part of the family Scorpaenidae. It is found in deep waters of the northeastern Pacific Ocean. Longspine thornyhead are similar in appearance to shortspine thornyhead though they don't grow as large and are typically found in deeper water.

<i>Sebastolobus macrochir</i> Species of fish

Sebastolobus macrochir, the broadbanded thornyhead or broadfin thorny head, is a species of marine ray-finned fish belonging to the subfamily Sebastinae, the rockfishes, part of the family Scorpaenidae. It is found in deep waters of the northwestern Pacific Ocean.

<span class="mw-page-title-main">Atlantic thornyhead</span> Species of fish

The Atlantic thornyhead is a species of marine ray-finned fish belonging to the subfamily Sebastinae, the rockfishes, part of the family Scorpaenidae. It is found in the western Atlantic Ocean and the Caribbean Sea.

References

  1. 1 2 Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Genera in the family Sebastidae". Catalog of Fishes . California Academy of Sciences . Retrieved 28 December 2021.
  2. ↑ J. S. Nelson; T. C. Grande; M. V. H. Wilson (2016). Fishes of the World (5th ed.). Wiley. pp. 468–475. ISBN   978-1-118-34233-6.
  3. ↑ Christopher Scharpf & Kenneth J. Lazara, eds. (22 May 2021). "Order Perciformes (Part 8): Suborder Scorpaenoidei: Families Sebastidae, Setarchidae and Neosebastidae". The ETYFish Project Fish Name Etymology Database. Christopher Scharpf and Kenneth J. Lazara. Retrieved 28 December 2021.
  4. 1 2 3 4 Froese, Rainer and Pauly, Daniel, eds. (2021). Species of Sebastolobus in FishBase . August 2021 version.
  5. 1 2 "Genus: Sebastolobus, Thornyheads". Shorefishes of the Eastern Pacific online information system. Smithsonian Tropical Research Institute. Retrieved 28 December 2021.


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