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Nymphopsis Acinacispinatus
''Nymphopsis'' is a genus of sea spiders belonging to the family Ammotheidae. The genus has almost cosmopolitan distribution, except Europe. Species: *''Nymphopsis abstrusus'' *'' Nymphopsis acinacispinatus'' *'' Nymphopsis anarthra'' *'' Nymphopsis armatus'' *''Nymphopsis bathursti ''Nymphopsis'' is a genus of sea spiders belonging to the family Ammotheidae. The genus has almost cosmopolitan distribution In biogeography, cosmopolitan distribution is the term for the range of a taxon that extends across all or most of ...'' References {{Taxonbar, from=Q4347771 Pycnogonids Chelicerate genera Taxa named by William Aitcheson Haswell ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
William Aitcheson Haswell
William Aitcheson Haswell (5 August 1854 – 24 January 1925) was a Scottish-Australian zoologist specialising in crustaceans, winner of the 1915 Clarke Medal. His zoological author abbreviation is Haswell. Taxa authored by him are given in :Taxa named by William Aitcheson Haswell and bthis query __NOTOC__ Early life Haswell was born at Gayfield House, Edinburgh, son of James Haswell, banker, and his wife Margaret, ''née'' Cranston. Haswell studied at the Edinburgh Institution and the University of Edinburgh (M.A., 1877; BSc, 1878; D.Sc., 1887) where he won seven medals, and at the conclusion of his course gained the Bell-Baxter scholarship as the most distinguished natural science student of his year. Amongst his teachers were Thomas Henry Huxley, Archibald Geikie and Charles Wyville Thomson. He qualified for the MA and BSc degrees in 1878, and immediately afterwards, for reasons of health, went on a voyage to Australia. Career Haswell arrived in Sydney in late 1878 and s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sea Spiders
The sea, connected as the world ocean or simply the ocean, is the body of salty water that covers approximately 71% of the Earth's surface. The word sea is also used to denote second-order sections of the sea, such as the Mediterranean Sea, as well as certain large, entirely landlocked, saltwater lakes, such as the Caspian Sea. The sea moderates Earth's climate and has important roles in the water, carbon, and nitrogen cycles. Humans harnessing and studying the sea have been recorded since ancient times, and evidenced well into prehistory, while its modern scientific study is called oceanography. The most abundant solid dissolved in seawater is sodium chloride. The water also contains salts of magnesium, calcium, potassium, and mercury, amongst many other elements, some in minute concentrations. Salinity varies widely, being lower near the surface and the mouths of large rivers and higher in the depths of the ocean; however, the relative proportions of dissolved salts vary li ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ammotheidae
Ammotheidae is the most diversified group of the class Sea spider, Pycnogonida, with 297 species described in more than 20 genera, of which only ''Nymphopsis'' and ''Sericosura'' were found to be monophyletic. Despite its internal taxonomic uncertainty, studies on 18S rRNA supports its monophyly, and the subdivision on Achelinae and Ammotheinae subfamilies. Genera The family Ammotheidae comprises the following subfamilies: * ''Achelia'' Hodge, 1864 * ''Acheliana'' Arnaud, 1971 * ''Ammothea'' Leach, 1814 * ''Ammothella'' Verrill, 1900 * ''Austroraptus'' Hodgson, 1907 * ''Biammothea'' Pushkin, 1993 * ''Cilunculus'' Loman, 1908 * ''Dromedopycnon'' Child, 1982 * ''Elassorhis'' Child, 1982 * ''Hedgpethius'' Child, 1974 * ''Hemichela'' Stock, 1954 * ''Megarhethus'' Child, 1982 * ''Nymphopsis'' Haswell, 1885 * ''Oorhynchus'' Hoek, 1881 * ''Paranymphon'' Caullery, 1896 * ''Proboehmia'' Stock, 1991 * ''Prototrygaeus'' Stock, 1975 * ''Scipiolus'' Loman, 1908 * ''Serico ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cosmopolitan Distribution
In biogeography, cosmopolitan distribution is the term for the range of a taxon that extends across all or most of the world in appropriate habitats. Such a taxon, usually a species, is said to exhibit cosmopolitanism or cosmopolitism. The extreme opposite of a cosmopolitan species is an endemic one, being found only in a single geographical location. Qualification The caveat “in appropriate habitat” is used to qualify the term "cosmopolitan distribution", excluding in most instances polar regions, extreme altitudes, oceans, deserts, or small, isolated islands. For example, the housefly is highly cosmopolitan, yet is neither oceanic nor polar in its distribution. Related terms and concepts The term pandemism also is in use, but not all authors are consistent in the sense in which they use the term; some speak of pandemism mainly in referring to diseases and pandemics, and some as a term intermediate between endemism and cosmopolitanism, in effect regarding pandemism as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nymphopsis Abstrusus
''Nymphopsis'' is a genus of sea spiders belonging to the family Ammotheidae. The genus has almost cosmopolitan distribution, except Europe. Species: *'' Nymphopsis abstrusus'' *'' Nymphopsis acinacispinatus'' *'' Nymphopsis anarthra'' *'' Nymphopsis armatus'' *''Nymphopsis bathursti ''Nymphopsis'' is a genus of sea spiders belonging to the family Ammotheidae. The genus has almost cosmopolitan distribution In biogeography, cosmopolitan distribution is the term for the range of a taxon that extends across all or most of ...'' References {{Taxonbar, from=Q4347771 Pycnogonids Chelicerate genera Taxa named by William Aitcheson Haswell ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nymphopsis Acinacispinatus
''Nymphopsis'' is a genus of sea spiders belonging to the family Ammotheidae. The genus has almost cosmopolitan distribution, except Europe. Species: *''Nymphopsis abstrusus'' *'' Nymphopsis acinacispinatus'' *'' Nymphopsis anarthra'' *'' Nymphopsis armatus'' *''Nymphopsis bathursti ''Nymphopsis'' is a genus of sea spiders belonging to the family Ammotheidae. The genus has almost cosmopolitan distribution In biogeography, cosmopolitan distribution is the term for the range of a taxon that extends across all or most of ...'' References {{Taxonbar, from=Q4347771 Pycnogonids Chelicerate genera Taxa named by William Aitcheson Haswell ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nymphopsis Anarthra
''Nymphopsis'' is a genus of sea spiders belonging to the family Ammotheidae. The genus has almost cosmopolitan distribution, except Europe. Species: *''Nymphopsis abstrusus'' *''Nymphopsis acinacispinatus'' *'' Nymphopsis anarthra'' *'' Nymphopsis armatus'' *''Nymphopsis bathursti ''Nymphopsis'' is a genus of sea spiders belonging to the family Ammotheidae. The genus has almost cosmopolitan distribution In biogeography, cosmopolitan distribution is the term for the range of a taxon that extends across all or most of ...'' References {{Taxonbar, from=Q4347771 Pycnogonids Chelicerate genera Taxa named by William Aitcheson Haswell ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nymphopsis Armatus
''Nymphopsis'' is a genus of sea spiders belonging to the family Ammotheidae. The genus has almost cosmopolitan distribution, except Europe. Species: *''Nymphopsis abstrusus'' *''Nymphopsis acinacispinatus'' *''Nymphopsis anarthra'' *'' Nymphopsis armatus'' *''Nymphopsis bathursti ''Nymphopsis'' is a genus of sea spiders belonging to the family Ammotheidae. The genus has almost cosmopolitan distribution In biogeography, cosmopolitan distribution is the term for the range of a taxon that extends across all or most of ...'' References {{Taxonbar, from=Q4347771 Pycnogonids Chelicerate genera Taxa named by William Aitcheson Haswell ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nymphopsis Bathursti
''Nymphopsis'' is a genus of sea spiders belonging to the family Ammotheidae. The genus has almost cosmopolitan distribution In biogeography, cosmopolitan distribution is the term for the range of a taxon that extends across all or most of the world in appropriate habitats. Such a taxon, usually a species, is said to exhibit cosmopolitanism or cosmopolitism. The ext ..., except Europe. Species: *'' Nymphopsis abstrusus'' *'' Nymphopsis acinacispinatus'' *'' Nymphopsis anarthra'' *'' Nymphopsis armatus'' *'' Nymphopsis bathursti'' References {{Taxonbar, from=Q4347771 Pycnogonids Chelicerate genera Taxa named by William Aitcheson Haswell ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pycnogonids
Sea spiders are marine arthropods of the order Pantopoda ( ‘all feet’), belonging to the class Pycnogonida, hence they are also called pycnogonids (; named after ''Pycnogonum'', the type genus; with the suffix '). They are cosmopolitan, found in oceans around the world. The over 1,300 known species have legs ranging from to over . Most are toward the smaller end of this range in relatively shallow depths; however, they can grow to be quite large in Antarctic and deep waters. Although "sea spiders" are not true spiders, or even arachnids, their traditional classification as chelicerates places them closer to true spiders than to other well-known arthropod groups, such as insects or crustaceans. This is in dispute, however, as genetic evidence suggests they may be the sister group to all other living arthropods. Description Sea spiders have long legs in contrast to a small body size. The number of walking legs is usually eight (four pairs), but the family Pycnogonidae hav ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chelicerate Genera
The subphylum Chelicerata (from New Latin, , ) constitutes one of the major subdivisions of the phylum Arthropoda. It contains the sea spiders, horseshoe crabs, and arachnids (including harvestmen, scorpions, spiders, solifuges, ticks, and mites, among many others), as well as a number of extinct lineages, such as the eurypterids (sea scorpions) and chasmataspidids. The Chelicerata originated as marine animals in the Middle Cambrian period; the first confirmed chelicerate fossils, belonging to ''Sanctacaris'', date from 508 million years ago. The surviving marine species include the four species of xiphosurans (horseshoe crabs), and possibly the 1,300 species of pycnogonids (sea spiders), if the latter are indeed chelicerates. On the other hand, there are over 77,000 well-identified species of air-breathing chelicerates, and there may be about 500,000 unidentified species. Like all arthropods, chelicerates have segmented bodies with jointed limbs, all covered ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
