Notomyxine tridentiger

Last updated

Notomyxine tridentiger
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Chordata
Infraphylum: Agnatha
Class: Myxini
Order: Myxiniformes
Family: Myxinidae
Subfamily: Myxininae
Genus: Notomyxine
Nani & Gneri, 1951
Species:
N. tridentiger
Binomial name
Notomyxine tridentiger
(Garman 1899)
Synonyms [1] [2]
  • Myxine tridentigerGarman 1899

Notomyxine tridentiger is a species of hagfish that occurs in the Atlantic Ocean off the southern coasts of South America. It is the only member of the genus Notomyxine. It can be found in the temperate waters of the Southeast Pacific and Southwest Atlantic, as well as the southern coasts of South America. It can reach a maximum length of 57 cm.

Contents

Conservation status

Notomyxine tridentiger has been found only along the Argentinean continental shelf and southern Chile and has not been reported since 1968. Its shallow depth range and medium body size make it very likely to be exposed to extensive trawling activities throughout its range, although it has not been reported in any bycatch surveys. It is listed as data deficient by the IUCN. More research is needed to understand the distribution, population status, habitat, biology, ecology, and impact of potential major threats to this species.

Habitat

This species is located off the south coast of South America, from northern Argentina (off Buenos Aires) to southern Chile, including the Strait of Magellan and Tierra del Fuego. It is found on muddy bottoms of the continental shelf at depths from 6–143 m.

Reproduction

The copulatory organ is absent in this species. The gonads of hagfishes are situated in the peritoneal cavity. The ovary is found in the anterior portion of the gonad, and the testis is found in the posterior part. The animal becomes female if the cranial part of the gonad develops or male if the caudal part undergoes differentiation. If none develops, then the animal becomes sterile. If both anterior and posterior parts develop, then the animal becomes a functional hermaphrodite. However, hermaphroditism being characterised as functional needs to be validated by more reproduction studies (Patzner 1998). Of 11 females (405–575 mm in total length) examined by Nani and Gneri (1951), those longer than 500 mm were mature. A 507-mm female contained eggs ranging in size from 24.5 x 6.6 to 28 x 8 mm.

Related Research Articles

<span class="mw-page-title-main">Latidae</span> Family of fishes

The Latidae, known as the lates perches, are a family of perch-like fish found in Africa, Asia, and the Indian and western Pacific Oceans. Including about 13 species, the family, previously classified subfamily Latinae in family Centropomidae, was raised to family status in 2004 after a cladistic analysis showed the original Centropomidae were paraphyletic.

<span class="mw-page-title-main">Brook lamprey</span> Species of jawless fish

The brook lamprey is a small European lamprey species that exclusively inhabits freshwater environments. The species is related to, but distinct from, the North American western brook lamprey.

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

The belted sandfish, also known as the dwarf sea bass or stubby sea bass, is a species of marine ray-finned fish, a sea bass from the subfamily Serraninae, classified as part of the family Serranidae which includes the groupers and anthias. It is found in the western Atlantic Ocean. This species is found in the aquarium trade.

<span class="mw-page-title-main">Arctic lamprey</span> Species of jawless fish

The Arctic lamprey, also known as the Japanese river lamprey or Japanese lampern, is a species of lamprey, a jawless fish in the order Petromyzontiformes. It inhabits coastal freshwater habitat types in the Arctic. Some populations are anadromous, spending part of their lives in the ocean. It is the most common and widespread lamprey in the Arctic region.

<span class="mw-page-title-main">Broadgilled hagfish</span> Species of jawless fish

The broadgilled hagfish or New Zealand hagfish is a hagfish found around New Zealand and the Chatham Islands as well as around the south and east coasts of Australia, at depths between 1 and 900 metres.

<span class="mw-page-title-main">Redspotted catshark</span> Species of shark

The redspotted catshark, also known as the Chilean catshark, is a species of catshark commonly found in the coastal waters of the southeastern Pacific, from central Peru to southern Chile. They are typically found in the rocky sublittoral areas at the edge of the continental shelf, in waters down to 100 m in depth. They spend the spring, summer, and fall in rocky subtidal areas, but winter in deeper offshore waters due to the strong currents at that time of year.

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

The Florida gar is a species of gar found in the US from the Savannah River and Ochlockonee River watersheds of Georgia and throughout peninsular Florida. Florida gar can reach a length over 3 ft (91 cm). The young feed on zooplankton and insect larvae, as well as small fish. Adults mainly eat fish, shrimp, and crayfish. Although edible, they are not popular as food. The roe is highly toxic to many animals, including humans and birds.

<span class="mw-page-title-main">Izak catshark</span> Species of catshark, of the family Scyliorhinidae

The Izak catshark or simply Izak is a species of catshark, belonging to the family Scyliorhinidae, common off the coasts of South Africa and southern Namibia. It typically inhabits the outer continental shelf at depths of 100–300 m (330–980 ft), with the males found deeper than the females and juveniles. The Izak catshark has a short, wide, flattened head and a robust body tapering to a long, slender tail. It can be identified by its ornate color pattern of dark brown spots or reticulations and blotches on a light yellowish background, as well as by the enlarged dermal denticles over its pectoral fins and along its dorsal midline from the snout to the second dorsal fin. This species reaches 69 cm (27 in) in length, with the males larger than females.

<span class="mw-page-title-main">Bristly catshark</span> Species of shark

The bristly catshark is a cat shark of the family Scyliorhinidae, found from southeastern India and the Andaman Islands, between latitudes 15° N and 5° N, at depths between 200 and 300 m. Its length usually ranges from around 20–26 cm, and it is regarded as the smallest catshark of Bythaelurus.

<span class="mw-page-title-main">African sawtail catshark</span> Species of shark

The African sawtail catshark is a species of catshark, part of the family Scyliorhinidae. Demersal in nature, it is found at depths of 160–720 m (520–2,360 ft) off the western African coast from Morocco to South Africa. This slender species has a rather long, pointed snout, a series of dark saddles along the back and tail, and a prominent crest of enlarged dermal denticles along the upper edge of the caudal fin. Its maximum known length is 46 cm (18 in).

Squalus nasutus, the western longnose spurdog, is a dogfish of the family Squalidae, found on the continental shelf off the northwest and southwest coasts of Western Australia, at depths between 300 and 510 m. Its length is at least 55 cm.

<span class="mw-page-title-main">Pacific hagfish</span> Species of jawless fish

The Pacific hagfish is a species of hagfish. It lives in the mesopelagic to abyssal Pacific ocean, near the ocean floor. It is a jawless fish and has a body plan that resembles early paleozoic fish. They are able to excrete prodigious amounts of slime in self-defense.

<span class="mw-page-title-main">Wide stingaree</span> Species of cartilaginous fish

The wide stingaree is a little-known species of stingray in the family Urolophidae, found off southwestern Australia. It typically occurs over sand in water 200–300 m (660–980 ft) deep around the edge of the continental shelf. This species has a broad diamond-shaped pectoral fin disc, a slightly pointed snout, and a tail with a leaf-like caudal fin, skin folds along either side, and no dorsal fins. Between its nostrils is a skirt-shaped curtain of skin. It is grayish green above, with faint bluish lines beside and behind the eyes. The maximum length on record is 52 cm (20 in).

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

The shortnose gar is a primitive freshwater fish of the family Lepisosteidae. It is native to the United States where its range includes the Mississippi and Missouri River basins, ranging from Montana to the west and the Ohio River to the east, southwards to the Gulf Coast. It inhabits calm waters in large rivers and their backwaters, as well as oxbow lakes and large pools. It is a long, slender fish, brown or olive green above and whitish below. It typically grows to about 60 cm (24 in) and is armored by rows of interlocking, rhomboidal ganoid scales.

<span class="mw-page-title-main">Southern hagfish</span> Species of jawless fish

The southern hagfish is a hagfish of the genus Myxine.

Eptatretus bischoffii is a common hagfish of the genus Eptatretus. Its maximum length is 55 centimetres (22 in). It lives in a demersal, non-migratory, marine habitat with its depth range between 8–50 m. It can survive in only temperate zones. These organisms are found in the South Pacific, mainly, Chile. It is harmless to humans.

The least brook lamprey is a common, non-parasitic lamprey distributed in the Mississippi River watershed, and a limited range along the Atlantic coast.

The Panama hake, also known as the dwarf hake, is a merluccid hake found off the west coast of the Americas from Del Mar, California, to Ensenada de Tumaco, Colombia.

<i>Eptatretus hexatrema</i> Species of jawless fish

Eptatretus hexatrema, the sixgill hagfish or snotslang, is a species of marine fish in the hagfish family of order Myxiniformes. It is native to the South Atlantic Ocean and southwestern Indian Ocean.

<i>Myxine circifrons</i> Species of fish

Myxine circifrons, the whiteface hagfish, is a marine bathydemersal species of fish in the family Myxinidae. It is found off Southern California, Peru, and Chile and grows to 65 centimetres (26 in) total length.

References

  1. Van Der Laan, Richard; Eschmeyer, William N.; Fricke, Ronald (11 November 2014). "Family-group names of Recent fishes". Zootaxa. 3882 (1): 1–230. doi: 10.11646/zootaxa.3882.1.1 . PMID   25543675.
  2. Froese, R.; Pauly, D. (2017). "Petromyzontidae". FishBase version (02/2017). Retrieved 18 May 2017.