|
Harrimaniidae
Harrimaniidae is a basal family of acorn worms. A taxonomic revision was undertaken in 2010, and a number of new genera and species found in the Eastern Pacific were described. In this family the development is direct without tornaria larva, and circular muscle fibers in their trunk is missing. There is some indication that Stereobalanus may be a separate basal acorn worm lineage, sister to all remaining acorn worms. Species The following genera and species are listed in the World Register of Marine Species: . Retrieved October 17, 2011. *'' Harrimania [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acorn Worm
The acorn worms or Enteropneusta are a Hemichordata, hemichordate class of invertebrates consisting of one order of the same name. The closest non-hemichordate relatives of the Enteropneusta are the echinoderms. There are 111 known species of acorn worm in the world, the main species for research being ''Saccoglossus kowalevskii''. Two families—Harrimaniidae and Ptychoderidae—separated at least 370 million years ago. Until recently, it was thought that all species Fauna (animals)#Infauna, lived in the sediment on the seabed, subsisting as deposit feeders or suspension feeders. However, the early 21st century has seen the description of a new family, the Torquaratoridae, evidently limited to the deep sea, in which most of the species crawl on the surface of the ocean bottom and alternatively rise into the water column, evidently to drift to new foraging sites. It is assumed that the ancestors of acorn worms used to live in tubes like their relatives Pterobranchia, but that they ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Enteropneusta
The acorn worms or Enteropneusta are a hemichordate class of invertebrates consisting of one order of the same name. The closest non-hemichordate relatives of the Enteropneusta are the echinoderms. There are 111 known species of acorn worm in the world, the main species for research being '' Saccoglossus kowalevskii''. Two families—Harrimaniidae and Ptychoderidae—separated at least 370 million years ago. Until recently, it was thought that all species lived in the sediment on the seabed, subsisting as deposit feeders or suspension feeders. However, the early 21st century has seen the description of a new family, the Torquaratoridae, evidently limited to the deep sea, in which most of the species crawl on the surface of the ocean bottom and alternatively rise into the water column, evidently to drift to new foraging sites. It is assumed that the ancestors of acorn worms used to live in tubes like their relatives Pterobranchia, but that they eventually started to live a safer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meioglossus
''Meioglossus psammophilus'' is a species of acorn worm in the family Harrimaniidae, the only known species of the genus ''Meigolossus''. It inhabits the Western Caribbean and Bermuda. The name of the species derives from two Greek words; ''psammon'' and ''philos'' which in translation means ''friend of the sands'' in reference to adult stage of species' lifestyle. The length of the species is . It is able to reproduce asexually through paratomy Paratomy is a form of asexual reproduction in animals where the organism splits in a plane perpendicular to the antero-posterior axis and the split is preceded by the "pregeneration" of the anterior structures in the posterior portion. The developi .... References Animals described in 2012 Articles containing video clips Enteropneusta {{Hemichordate-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mesoglossus Pygmaeus
''Mesoglossus pygmaeus'' is a species of acorn worm in the family Harrimaniidae, which is found in Europe, precisely in British Isles.Howson, C.M.; Picton, B.E. (Ed.) (1997). The species directory of the marine fauna and flora of the British Isles and surrounding seas. Ulster Museum The Ulster Museum, located in the Botanic Gardens in Belfast, has around 8,000 square metres (90,000 sq. ft.) of public display space, featuring material from the collections of fine art and applied art, archaeology, ethnography, treasure ... Publication, 276. The Ulster Museum: Belfast, UK. References Animals described in 1938 Invertebrates of Europe Enteropneusta {{Hemichordate-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mesoglossus Intermedius
''Mesoglossus intermedius'' is a species of acorn worms in the family Harrimaniidae, which is endemic to Northern California Northern California (colloquially known as NorCal) is a geographic and cultural region that generally comprises the northern portion of the U.S. state of California. Spanning the state's northernmost 48 counties, its main population centers incl .... References Animals described in 2010 Endemic fauna of California Hemichordates {{Hemichordate-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mesoglossus Caraibicus
''Mesoglossus caraibicus'' is a species of acorn worm in the family Harrimaniidae, which can be found on Bahamas, Greater Antilles, Southern Caribbean, and Gulf of Mexico The Gulf of Mexico ( es, Golfo de México) is an oceanic basin, ocean basin and a marginal sea of the Atlantic Ocean, largely surrounded by the North American continent. It is bounded on the northeast, north and northwest by the Gulf Coast of .... References Enteropneusta Animals described in 1924 {{Hemichordate-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harrimania Planktophilus
''Harrimania planktophilus'' is a marine acorn worm in the family Harrimaniidae. It lives in a burrow in sediment on the sea floor. It is only known from western Canada and was first described by Cameron in 2002. The species name is from the Greek and translates as "lover of plankton". Description ''Harrimania planktophilus'' can grow to about 6 cm (2.5 in) long but is more typically 3.5 cm. Though generally cylindrical, the body is divided into several distinct regions, having a short cream-coloured, extendible proboscis, an orange collar and a long yellow and grey trunk. The proboscis has a dorsal groove and is cone-shaped, being rather longer than it is wide. It contains a skeleton which extends into the anterior part of the trunk. Near the front of the short, wide collar is a circumbuccal groove in which the mouth is situated. Contractions of its muscular lip cause the size and shape of the mouth to vary. There is a small brown pit where the collar meets the tru ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saccoglossus
''Saccoglossus '' is a genus of acorn worm (Class Enteropneusta). It is the largest genus in this class, with 18 species.Cameron, C. B., et al. (2010)A revision of the genus ''Saccoglossus'' (Hemichordata: Enteropneusta: Harrimaniidae) with taxonomic descriptions of five new species from the Eastern Pacific.''Zootaxa'' 2483 1-22. This genus is characterized especially by the concentric rings of muscle fibers in the proboscis. Many ''Saccoglossus'' can be found in coastal mud and sand habitat, often near bays. They dig tubes in the substrate, ejecting conical piles of castings in a spiral fashion. Acorn worms of this genus are known for the production and accumulation of various halogenated phenols and pyrroles. Species Species include: * '' Saccoglossus apatensis'' Thomas, 1956 * '' Saccoglossus aulakoeis'' Thomas, 1968 * '' Saccoglossus bromophenolosus'' King, Giray and Kornfield, 1994 * '' Saccoglossus horsti'' Brambell and Goodhart, 1941 * '' Saccoglossus hwangtauensis'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mesoglossus Macginitiei
''Mesoglossus'' is a genus of worms belonging to the family Harrimaniidae. Species: *'' Mesoglossus bournei'' *''Mesoglossus caraibicus'' *'' Mesoglossus gurneyi'' *''Mesoglossus intermedius'' *'' Mesoglossus macginitiei'' *''Mesoglossus pygmaeus ''Mesoglossus pygmaeus'' is a species of acorn worm in the family Harrimaniidae, which is found in Europe, precisely in British Isles.Howson, C.M.; Picton, B.E. (Ed.) (1997). The species directory of the marine fauna and flora of the British Isle ...'' References {{Taxonbar, from=Q18582228 Enteropneusta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mesoglossus Gurneyi
''Mesoglossus'' is a genus of worms belonging to the family Harrimaniidae. Species: *'' Mesoglossus bournei'' *''Mesoglossus caraibicus'' *'' Mesoglossus gurneyi'' *''Mesoglossus intermedius'' *''Mesoglossus macginitiei'' *''Mesoglossus pygmaeus ''Mesoglossus pygmaeus'' is a species of acorn worm in the family Harrimaniidae, which is found in Europe, precisely in British Isles.Howson, C.M.; Picton, B.E. (Ed.) (1997). The species directory of the marine fauna and flora of the British Isle ...'' References {{Taxonbar, from=Q18582228 Enteropneusta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mesoglossus Bournei
''Mesoglossus'' is a genus of worms belonging to the family Harrimaniidae. Species: *'' Mesoglossus bournei'' *''Mesoglossus caraibicus'' *''Mesoglossus gurneyi'' *''Mesoglossus intermedius'' *''Mesoglossus macginitiei'' *''Mesoglossus pygmaeus ''Mesoglossus pygmaeus'' is a species of acorn worm in the family Harrimaniidae, which is found in Europe, precisely in British Isles.Howson, C.M.; Picton, B.E. (Ed.) (1997). The species directory of the marine fauna and flora of the British Isle ...'' References {{Taxonbar, from=Q18582228 Enteropneusta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harrimania Maculosa
''Harrimania'' is a genus of worms belonging to the family Harrimaniidae. The species of this genus are found in Europe. Species: *'' Harrimania borealis'' *'' Harrimania kupfferi'' *'' Harrimania maculosa'' *''Harrimania planktophilus ''Harrimania planktophilus'' is a marine acorn worm in the family Harrimaniidae. It lives in a burrow in sediment on the sea floor. It is only known from western Canada and was first described by Cameron in 2002. The species name is from the Gree ...'' References {{Taxonbar, from=Q3814533 Enteropneusta Hemichordate genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.jpg "Click for more on -> Acorn Worm")