| Rouleina maderensis | |
|---|---|
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Alepocephaliformes |
| Family: | Alepocephalidae |
| Genus: | Rouleina |
| Species: | R. maderensis |
| Binomial name | |
| Rouleina maderensis Maul, 1948 | |
Rouleina maderensis, the Madeiran smooth-head, is a species of fish in the family Alepocephalidae. [2]
It is found worldwide. This species reaches a length of 32 cm (13 in). [3]
Sardine and pilchard are common names for various species of small, oily forage fish in the herring suborder Clupeoidei. The term 'sardine' was first used in English during the early 15th century; a somewhat dubious etymology says it comes from the Italian island of Sardinia, around which sardines were once supposedly abundant.
Günther Edmund Maul was a German ichthyologist and taxidermist in Portugal. Maul came to Madeira in December 1930 to work as taxidermist at Museu Municipal do Funchal, which opened to the public in 1933. He was appointed director for the museum in 1940, a post that he held to his retirement in 1979. He, however, continued his research until shortly before his death. He started two journals and opened the museum's aquarium to the public in 1959. He also participated in several expeditions including with the French bathyscaphe Archimède in 1966 and organised the first multidisciplinary expedition to the Salvage Islands in 1963. He was awarded an honorary doctorate from the University of Madeira in 1995.
Slickheads, also known as nakedheads or smoothheads, are deep water fishes that belong to the family Alepocephalidae. They are most commonly found in the bathypelagic layer, which is approximately 3000m below the surface. They get their name from the lack of scales on their heads. Similarly, the scientific name is from the Greek ᾰ̓- (a-, "not"); λέπος (lepos, "scale"); and κεφαλή (kephalē, "head"). It has about 22 genera with ca. 96 species.
The bluntsnout smooth-head, black slickhead, Cope's bluntsnout smooth-head, or Atlantic gymnast, Xenodermichthys copei, is a slickhead of the genus Xenodermichthys, found in the Atlantic, Indian, and Pacific oceans, and the Tasman Sea, at depths of 100 to 2,600 m. This species grows to a length of 31 centimetres (12 in) TL.
Sardinella maderensis is a species of small ray-finned fish in the genus Sardinella which is found in the Eastern Atlantic and Southeastern Mediterranean. it is a silvery fish similar to the round sardinella, but can be distinguished from that species by having gray caudal fins with black tips. It feeds on phytoplankton and fish larvae and is a pelagic, oceanodromous species that forms schools in coastal waters, often mixed with S. aurita. The International Union for Conservation of Nature has rated this fish's conservation status as "vulnerable".
Bathyprion, is a genus of deepwater marine ray-finned fish belonging to the family Alepocephalidae, the slickheads. Its only extant species is Bathyprion danae, the fangtooth smooth-head. This species is found in the Atlantic and western Pacific Oceans.
Leptoderma is a genus of slickheads found in the deep waters of the oceans.
Mirognathus is a monospecific genus of deepwater maine ray-finned fish belonging to the family Alepocephalidae, the slickheads. The only species in the genus is Mirognathus normani, the beaked slickhead or Norman's smooth-head, which is found in the north-east and western Atlantic Ocean, the western Indian Ocean and the western Pacific Ocean. This species grows to a standard length of 20 centimetres (7.9 in).
Photostylus is a monospecific genus of deepwater maine ray-finned fish belonging to the family Alepocephalidae, the slickheads. The only species in the genus is Photostylus pycnopterus, the starry smooth-head, a species found in all oceans at depths of from 1,000 metres (3,300 ft) to 2,000 metres (6,600 ft). This species grows to a length of 11 centimetres (4.3 in) SL.
Rinoctes is a monospecific genus of deepwater maine ray-finned fish belonging to the family Alepocephalidae, the slickheads. The only species in the genus is Rinoctes nasutus, the abyssal smooth-head, which is found at depths of 2,000 metres (6,600 ft) to 4,156 metres (13,635 ft) in the Atlantic Ocean, and possibly in the Indian and Pacific Oceans. It grows to a length of 19 centimetres (7.5 in) SL.
Rouleina is a genus of slickheads. The genus is named for the ichthyologist Louis Roule.
Herwigia is a monospecific genus of deepwater maine ray-finned fish belonging to the family Alepocephalidae, the slickheads. The only species in the genus is Herwigia kreffti, or Krefft's smooth-head, a species found at depths of 1,000 to 3,200 metres in the oceans. This species grows to a length of 40 centimetres (16 in) SL.
The Madeira rockfish is a species of scorpionfish (Scorpaenidae) in the genus Scorpaena, found in the coastal waters of the eastern Atlantic Ocean and the Mediterranean Sea. This species reaches a length of around 14 centimetres (5.5 in) SL. The species was described by Achille Valenciennes in 1833 after a specimen from Madeira. Although S. maderensis is well represented in the areas that it is found, many key aspects of its biology are still unknown.
The salmon smooth-head, also called the deepsea slickhead, is a species of fish in the family Alepocephalidae.
The elongate smooth-head, also called the elongate slickhead, is a species of fish in the family Alepocephalidae.
Rouleina attrita, the softskin smooth-head or softskin slickhead, is a species of fish in the family Alepocephalidae.
Narcetes erimelas is a species of fish in the family Alepocephalidae (slickheads). The fish is found worldwide. This species reaches a length of 29.1 cm (11.5 in).
Leptoderma macrops, the grenadier smooth-head, is a species of slickhead found in the eastern Atlantic Ocean.
Leptoderma macrophthalmum is a species of slickhead found in the Atlantic Ocean.
Vaillant's smooth-head is a species of deepwater marine ray-finned fish belonging to the family Alepocephalidae, the smooth-heads. This species is found in the Atlantic Indian and Western Pacific Oceans.
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