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Boreomysis
''Boreomysis'' (from Greek '' Boreas'', the god of the northern winds, and the genus name '' Mysis'') is a mysid crustacean genus, the type of the subfamily Boreomysinae of the family Mysidae. Majority of the species are found in the ocean deep water. Cosmopolitan. 38 species. Description Compared to another genus of the subfamily, '' Neobirsteiniamysis'', the members of the genus ''Boreomysis'' have narrower telson, not expanded in the central part, being always narrower than in the anterior part. Also the eyes are mostly normally developed. Although in certain species the eyes may be reduced to certain extent, they still always possess cornea, unlike in '' Neobirsteiniamysis''. Taxonomy The originally designated type species is '' Mysis arctica'' Krøyer, 1861. ''Boreomysis'' is one of the most difficult mysid genera, mostly due to considerable variation with age. Classification The species of ''Boreomysis'' are distributed among two subgenera: *''Boreomysis'' sensu stricto, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Boreomysis Megalops
''Boreomysis'' (from Greek ''Boreas (god), Boreas'', the god of the northern winds, and the genus name ''Mysis'') is a Mysida, mysid crustacean genus, the type of the subfamily Boreomysinae of the family Mysidae. Majority of the species are found in the ocean deep water. Cosmopolitan. 38 species. Description Compared to another genus of the subfamily, ''Neobirsteiniamysis'', the members of the genus ''Boreomysis'' have narrower telson, not expanded in the central part, being always narrower than in the anterior part. Also the eyes are mostly normally developed. Although in certain species the eyes may be reduced to certain extent, they still always possess cornea, unlike in ''Neobirsteiniamysis''. Taxonomy The originally designated type species is ''Boreomysis arctica, Mysis arctica'' Krøyer, 1861. ''Boreomysis'' is one of the most difficult mysid genera, mostly due to considerable variation with age. Classification The species of ''Boreomysis'' are distributed among two subge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Boreomysis Dubia
''Boreomysis'' (from Greek ''Boreas'', the god of the northern winds, and the genus name ''Mysis'') is a mysid crustacean genus, the type of the subfamily Boreomysinae of the family Mysidae. Majority of the species are found in the ocean deep water. Cosmopolitan. 38 species. Description Compared to another genus of the subfamily, '' Neobirsteiniamysis'', the members of the genus ''Boreomysis'' have narrower telson, not expanded in the central part, being always narrower than in the anterior part. Also the eyes are mostly normally developed. Although in certain species the eyes may be reduced to certain extent, they still always possess cornea, unlike in '' Neobirsteiniamysis''. Taxonomy The originally designated type species is '' Mysis arctica'' Krøyer, 1861. ''Boreomysis'' is one of the most difficult mysid genera, mostly due to considerable variation with age. Classification The species of ''Boreomysis'' are distributed among two subgenera: *''Boreomysis'' sensu stricto, 3 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Boreomysis Sibogae
''Boreomysis sibogae'' is a species of mysid crustaceans from the subfamily Boreomysinae (family Mysidae). It is also a member of the nominotypical subgenus ''Boreomysis'' sensu stricto. The species is an epi-bathypelagic mysid, widely distributed in the Indo-Pacific and possibly also in the Atlantic Ocean. Taxonomic History In 1899, an immature male and two immature females were collected from Banda Sea near Manipa Island during the Dutch Siboga expedition in the Indonesian Archipelago (station 185). The material went to a Danish zoologist Hans Jacob Hansen, who shortly described a new species ''Boreomysis sibogae'' in 1910. The three syntypes are deposited in the Naturalis Biodiversity Center, Leiden. In 1937 I. Coifmann described a small male with long eye papilla and long terminal spiniform setae of telson from the Gulf of Aden in the Northwest Indian Ocean under the name ''Boreomysis spinifera''. In 1955 it was synonymised with ''B. sibogae'' by O. S. Tattersall. This wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Boreomysis Sphaerops
''Boreomysis sphaerops'' is a species of mysid crustaceans from the subfamily Boreomysinae (family Mysidae). It is also a member of the nominotypical subgenus ''Boreomysis'' sensu stricto. The species is a meso-bathypelagic mysid, distributed in the West Indo-Pacific, although known only from few records off Japan and Australia. History of discovery In March-April 1938, a large number of specimens was brought by a vertical net from 1000 m depth to the surface from Sagami Bay off Ajiro Island in Japan. In 1964, N. Ii designated a 23 mm male from the April catch as the "type", and a 25 mm female from the March sample as the "allotype" of a new species ''Boreomysis sphaerops'', and described it in detail. It seems that the species was known by other workers before the formal description. In 1958, A. Birstein and J. G. Tchindonova identified ''B. spinifera'' from the Northwest Pacific. The specimens had the dilatation in the telson cleft, not known in '' B. spinifera'', and their s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Boreomysis Inopinata
''Boreomysis inopinata'' is a species of mysid crustaceans from the subfamily Boreomysinae (family Mysidae). It is also a member of the nominotypical subgenus ''Boreomysis'' sensu stricto. The species is a deepwater bathypelagic mysid, found only from the Tasman Sea off Australia. History of discovery First two specimens of ''B. inopinata'' were collected off Tasmania in the Huon Commonwealth Marine Reserve at the depth of 1060 m in 2015 during the research cruise of RV Investigator. Another juvenile was pulled up onboard of the same vessel in 2017 from the greater depth of 2324–2634 m in the Central Eastern Commonwealth Marine Reserve off New South Wales. In 2018 still another, albeit large series was collected again off Tasmania near Punch's Hill at 919–1086 m depth. The entire collection became the base for the original description in Finland in 2023. The material is deposited at the Australian Museum. Etymology The species was discovered to have an uncommon for mysids a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Boreomysis Urospina
''Boreomysis urospina'' is a species of mysid crustacean from the subfamily Boreomysinae (family Mysidae). It is also a member of the subgenus '' Petryashovia''. The species is a mesopelagic mysid, found only in the Tasman Sea, off Australia. Taxonomy The first 23 specimens of ''B. urospina'' were collected off Tasmania in the Huon Commonwealth Marine Reserve at the depth of 1046–1070 m in 2015 during the research cruise of RV Investigator. Many more specimens were pulled up onboard of the same vessel in 2018 from 919 to 1086 m off Tasmania. The entire collection became the base for the original description in Finland in 2023. The material is deposited at the Australian Museum. The species name represents an adjective, formed from the New Latin prefix ''uro-'', i.e. ''tail'', with the reference to the uropods, and the Latin word ''spina'', meaning a ''spine''. This is a reference to the increased number of the uropodal spiniform setae, and also to the unique position of the s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Boreomysinae
Boreomysinae is a subfamily of large, mostly deep-water oceanic mysid crustaceans from the family Mysidae. The name, which can be translated as "northern mysids", comes from the genus '' Boreomysis'' G.O. Sars, 1869, established for '' Boreomysis arctica'' ( Krøyer, 1861) from the boreal waters of Atlantic. As more species have been discovered subsequently, the subfamily is considered panoceanic, and includes 38 species from two genera, '' Boreomysis'' and '' Neobirsteiniamysis'' Hendrickx et Tchindonova, 2020. Boreomysinae is a primitive group, uniquely distinguished from other subfamilies of Mysidae by the presence of the seven pairs of oostegites, which can be maximum four in other subfamilies, and by the incomplete proximal suture on the uropodal exopods (either complete and distal or completely absent in the rest of subfamilies). Boreomysinaes show wide diversity in the structure of eyes, from rather reduced to large with well-developed cornea. Being an ancient grou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Victor Vladimirovich Petryashov
Victor Vladimirovich Petryashov (16 March 1956 - 2 July 2018) was a Russian zoologist, carcinologist, hydrobiologist and biogeographer. His scientific research focused on taxonomy and distribution of malacostracan crustaceans, particularly orders Mysida, Lophogastrida and Leptostraca, and marine biogeography and hydrobiology of Arctic, Antarctic and temperate seas of the World, and he published over 120 works.Spiridonov, V.A., Daneliya, M.E., Smirnov, I.S., Chernyshev, A.B., Gagaev, S.Y. 2019. To the memory of Victor Vladimirovich Petryashov (1956−1918). Invertebrate Zoology, 16(3): 311–322 V.V. Petryashov spent all his professional life in St. Petersburg in the Zoological Institute of the Russian Academy of Sciences. As a senior researcher he also curated the malacostracan crustacean collection of the Zoological Institute. Named taxa Mysida: *'' Paracanthomysis shikhotaniensis'' Petrjashov, 1983 *'' Stylomysis arcticoglacialis'' (Petryashov, 1990) (originally '' Mysis ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Mysidae
Mysidae is the largest family of crustaceans in the order Mysida, with over 1000 species in around 170 genera. Characteristics Members of the family Mysidae are distinguished from other mysids by the fact that the first pereopod (walking leg) has a well-developed exopod (outer branch), the carpopropodus of the endopod (inner branch) of the 3rd to 8th pereopods is divided into sub-segments and there are statocysts on the endopod of the uropod Uropods are posterior appendages found on a wide variety of crustaceans. They typically have functions in locomotion. Definition Uropods are often defined as the appendages of the last body segment of a crustacean. An alternative definition sugge ...s (posterior appendages). Female petalophthalmidans have two or three oostegites (flexible bristly flaps) forming the base of the marsupium or brood pouch under the thorax, apart from the subfamily Boreomysinae, which has seven pairs of oostegites. Subfamilies and genera The following subfami ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Georg Ossian Sars
Prof Georg Ossian Sars HFRSE (20 April 1837 – 9 April 1927) was a Norway, Norwegian marine biology, marine and freshwater biology, freshwater biologist. Life Georg Ossian Sars was born on 20 April 1837 in Kinn (former municipality), Kinn, Norway (now part of Flora, Norway, Flora), the son of Pastor Michael Sars and Maren Sars; the historian Ernst Sars was his elder brother, and the singer and women's skiing pioneer Eva Nansen was his younger sister.Google Translate He grew up in Manger, Norway, Manger, Hordaland, where his father was the local priest. He studied from 1852 to 1854 at Bergen Cathedral School, from 1854 at Oslo Cathedral School, Christiania Cathedral School, and joined the university at Christiana (now the University of Oslo) in 1857. He indulged his interest in natural history while studying medicine; having collected water fleas in local lakes with Wilhelm Lilljeborg's works, he discovered new species, and this resulted in his first scientific publication. Geor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
