Sorberacea were a monoorder and monofamilial class of benthicTunicates. The single order of the class was Aspiraculata, and the single family of that order was Hexacrobylidae. In a taxonomic revision of the Tunicata in 2007, the name "Hexacrobylidae" was declared invalid and members of the family were included in the family Molgulidae in the class Ascidiacea.[1][2]
They superficially resemble sea squirts but prey on invertebrates such as crustaceans. They also have some unique physical features that distinguish them from the ascidiaceans, including a severely reduced pharynx, the retention of the dorsal nerve cord as adults, the superficial position of their ganglion and the unique histology of the cells of their digestive tracts. The branchial syphon is large and surrounded by six large lobes; the cloacal syphon is small. They live exclusively in deep water and range in size from less than one inch (2 cm) to 2.4 inches (6 cm).
Contrary to almost all tunicates, the members of this group are not filter-feeders, and instead capture and eat nematodes and small crustaceans. They are solitary animals, found only in the deep sea.[3]
Taxonomyedit
Order Aspiraculata
Family Hexacrobylidae
Genus Gasterascidia - accepted as Oligotrema Bourne, 1903
Gasterascidia lyra - accepted as Oligotrema lyra Monniot C. & Monniot F., 1973
Gasterascidia sandersi - accepted as Oligotrema sandersi (Monniot C. & Monniot F., 1968)
Genus Hexadactylus - accepted as Asajirus Kott, 1989
Hexadactylus arcticus - accepted as Asajirus indicus (Oka, 1913)
Hexadactylus eunuchus - accepted as Asajirus indicus (Oka, 1913)
Hexadactylus ledanoisi - accepted as Asajirus ledanoisi (Monniot C. & Monniot F., 1990)
aspiraculata, sorberacea, were, monoorder, monofamilial, class, benthic, tunicates, single, order, class, single, family, that, order, hexacrobylidae, taxonomic, revision, tunicata, 2007, name, hexacrobylidae, declared, invalid, members, family, were, included. Sorberacea were a monoorder and monofamilial class of benthic Tunicates The single order of the class was Aspiraculata and the single family of that order was Hexacrobylidae In a taxonomic revision of the Tunicata in 2007 the name Hexacrobylidae was declared invalid and members of the family were included in the family Molgulidae in the class Ascidiacea 1 2 AspiraculataScientific classificationDomain EukaryotaKingdom AnimaliaPhylum ChordataSubphylum TunicataClass SorberaceaOrder AspiraculataFamily HexacrobylidaeGenera and speciesSee text They superficially resemble sea squirts but prey on invertebrates such as crustaceans They also have some unique physical features that distinguish them from the ascidiaceans including a severely reduced pharynx the retention of the dorsal nerve cord as adults the superficial position of their ganglion and the unique histology of the cells of their digestive tracts The branchial syphon is large and surrounded by six large lobes the cloacal syphon is small They live exclusively in deep water and range in size from less than one inch 2 cm to 2 4 inches 6 cm Contrary to almost all tunicates the members of this group are not filter feeders and instead capture and eat nematodes and small crustaceans They are solitary animals found only in the deep sea 3 Taxonomy editOrder Aspiraculata Family Hexacrobylidae Genus Gasterascidia accepted as Oligotrema Bourne 1903 Gasterascidia lyra accepted as Oligotrema lyra Monniot C amp Monniot F 1973 Gasterascidia sandersi accepted as Oligotrema sandersi Monniot C amp Monniot F 1968 Genus Hexadactylus accepted as Asajirus Kott 1989 Hexadactylus arcticus accepted as Asajirus indicus Oka 1913 Hexadactylus eunuchus accepted as Asajirus indicus Oka 1913 Hexadactylus ledanoisi accepted as Asajirus ledanoisi Monniot C amp Monniot F 1990 Genus Oligotrema now included in the family Molgulidae Oligotrema lyra Oligotrema psammites Genus Sorbera accepted as Oligotrema Bourne 1903 Sorbera unigonas accepted as Oligotrema unigonas Monniot C amp Monniot F 1974 Sorbera digonas accepted as Oligotrema psammites Bourne 1903References edit Ascidiacea WoRMS World Register of Marine Species 2012 Retrieved 2013 04 09 Sanamyan K 2007 Database of extant Ascidiacea Version of 2 November 2007 Barnes Robert D 1982 Invertebrate Zoology Philadelphia PA Holt Saunders International p 1042 ISBN 0 03 056747 5 nbsp This tunicate related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Aspiraculata amp oldid 1152853137, wikipedia, wiki, book, books, library,
