Discovery of new species of deep-sea dogfish sharks. Marine biologists have discovered a new species of the genus Squallus shark in the tropical waters of southern Japan. Speri Sperdog (Squallus shirai): lateral (A – C) and abdominal (D, E) views. Scale bar – 50 mm. Squallus is a genus of dogfish shark in the Squalidae family, which is part of the squamous sequence.
Commonly known as sperdogs, these sharks are a commercially important species within the global fish trade, with individuals caught through direct or indirect fisheries, and meat, fins, and liver oil as primary products. It is marketed for consumption. Currently more than 30 species are recognized in the genus, of which at least six are native Japanese waters.
“Despite its high incidence, accurate species identification data are scarce, risks and population trends are unknown,” the South African Institute for Aquatic Biodeversity and Dr. de Marcello de Carvalho told the University of São Paulo. Sarah Viana said.
In a new study, the researchers modified the nominal squallus species that occur in the region. “The new species had been misidentified with the short-term Sperdog (Squallus mitsukuri), due to the same body size, wings, and muzzle length,” he explained. However, the morphological, meristic and morphometric evidence supports being a different and undesirable species.
Named after the Shiri Sperdog (Squallus shiri), the new shark has a body 59 and 77 centimeters (1.9–2.5 feet) long. Apparently, this species is Japanese endemic and is found in shallow waters of the upper continental slope at a depth of 310-390 m (1,017-1,280 ft) from southern Japan in the northwest Pacific Ocean.
“The Shiri sperdog differs from the short hawthorn sperdog, the body has light brown feathers, caudal and caudal with dorsal tips, and a largely white, unobstructed and lanceolate skin dentition and a great deal of caution and full vertebrae. ” The discovery has been reported in an article in the journal Zacistematics and Evolution.
A new character for Pokémon? New endemic species of dogfish shark discovered in Japan. Newly discovered creatures can often be influential and exciting from Japanese movies and shows. Many of those fictional characters, including the inhabitants of the famous Pokémon universe, may be their analogues between real animals native to Japan.
Perhaps, a new species of dogfish shark published in the open access journal ZooSystematics and Evolution is also “a true Pokemon to be”? A new deep-sea fish shark: Squalus shirai, was discovered in the tropical waters of southern Japan by an international team of scientists, led by Dr. from the South African Institute for Aquatic Biodeversity. Sarah Viana did it.
The new shark has a body length of 59–77 cm and some unique characteristics, such as the first elongated dorsal fins and caudal fins with wide white margins. Currently, the species is particularly known as a Japanese endemic, found in the shallow tropical waters of southern Japan in the Pacific Northwest.
Spurdogs are commercially important to the global fish trade tax. They are captured for various purposes: consumption of meat, feathers and liver oil. Despite its high incidence, accurate identification data for the species is scarce, with unknown population trends and risks.
Japan currently represents one of the world’s leading countries for the shark fish trade, however shark catches have decreased in volume over the past decades and more than 78 Elmasmobranch species traded on Japanese shark fin markets are now threatened. It is rated as.
The new species Squallus shirai was previously misidentified as the Short-winged Sperdog, because its body, wing, and muzzle were the same size. However, there are some differences that define the specificity of the new species.
“Body color is brown on scaly head. White, dorsal, and ventral tail posterior caudal and preventative tips are widely visible as upper black and white caudal spots in adults. Body near S. mutukuri Has black to brown color Dark and caudal black The margin of the ventral caudal is mostly white and the black superior caudal scar is not evident in adults ”, shares the main author, Dr. Viana.
Scientists grouped the former Japanese expert Dr. In honor of Shigeru Shirai, the name of the newly described species is proposed as Sperdog of Shirai.