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Ascidiacea

Description

Ascidiacea (commonly known as the ascidians or sea squirts) is a paraphyletic class in the subphylum Tunicata of sac-like marine invertebrate filter feeders. Ascidians are characterized by a tough outer "tunic" made of the polysaccharide cellulose.


Source Data
SourceIDLink
Global Biodiversity Information Facility ID (GBIF)356https://www.gbif.org/species/356
PaleoBioDB ID (PBDB)91601https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=91601
Rankclass
Taxonomy (GBIF,PBDB)Life : Animalia : Chordata : Ascidiacea
Taxonomic Status (GBIF)accepted
Classification
RankNameAuthor
kingdomAnimaliaLinnaeus 1758
TriploblasticaLankester 1877
NephrozoaJondelius et al. 2002
DeuterostomiaGrobben 1908
phylumChordataHaeckel 1847
OlfactoresJefferies 1991
subphylumUrochordata(Lankester 1877)
classAscidiaceaNielsen 1995
Unranked entries are considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors may disagree about how to rank taxa.
Scientific NameAscidiacea
Status (PBDB)extant
Taxon Size (PBDB)16
Extant Size (PBDB)1 (6.3%)
First Recorded Appearance272 - 269 Ma
Permian
Motilitystationary, attached (based on Urochordata)
Dietsuspension feeder (based on Urochordata)
Primary Reference (PBDB)D.-G. Shu, L. Chen, and J. Han, X.-L. Zhang. 2001. An Early Cambrian tunicate from China. Nature 411:472-473
Common Name(s) Sea Squirt, Sea Squirts
Wikipediahttps://en.wikipedia.org/wiki/Ascidiacea

External Images

Fossil Distribution

Subtaxa

NameStatusCommon Name(s)Fossil OccurrencesOldestYoungest
Aplousobranchia
order
acceptedNo associated record in PBDB
Phlebobranchia
order
acceptedNo associated record in PBDB
Stolidobranchia
order
acceptedNo associated record in PBDB
Melgulidae
family
acceptedNo associated record in PBDB
Micrascidites
genus
acceptedNo associated record in PBDB
Palaeobotryllus
genus
acceptedNo associated record in PBDB
Yarnemia
genus
acceptedNo associated record in PBDB

Unlinked PBDB sub-entries

NameStatusFossil OccurrencesExtantOldestYoungest
Khmeriamorpha
order
Not linked to GBIF25extinct272 Ma
Permian
232 Ma
Late Triassic

Synonymy List

YearName and Author
1995Ascidiacea Nielsen
2001Ascidiacea Shu et al. p. 472
2018Ascidiacea Wendt p. 587

References

Shu D.-G., Chen L., et al (2001) An Early Cambrian tunicate from China, Nature 411, 472-473
Wendt J. (2018) The first tunicate with a calcareous exoskeleton (Upper Triassic, Northern Italy), Palaeontology 61 4, 575-595 doi:10.1111/pala.12356
Blainville, H. M. D. de. (1824). Mollusques, Mollusca. In: Dictionnaire des Sciences Naturelles (F. Cuvier, ed.), vol. 32. Levrault, Strasbourg et Paris, & Le Normant, Paris. 1-392. - via World Register of Introduced Marine Species (WRiMS)
Hayward, P.J.; Ryland, J.S. (Ed.). (1990). The marine fauna of the British Isles and North-West Europe: 1. Introduction and protozoans to arthropods. Clarendon Press: Oxford, UK. ISBN 0-19-857356-1. 627 pp. - via World Register of Introduced Marine Species (WRiMS)
Blainville, H. M. D. de. (1824). Mollusques, Mollusca. In: Dictionnaire des Sciences Naturelles (F. Cuvier, ed.), vol. 32. Levrault, Strasbourg et Paris, & Le Normant, Paris. 1-392. - via World Register of Marine Species
Hayward, P.J.; Ryland, J.S. (Ed.). (1990). The marine fauna of the British Isles and North-West Europe: 1. Introduction and protozoans to arthropods. Clarendon Press: Oxford, UK. ISBN 0-19-857356-1. 627 pp. - via World Register of Marine Species
Buizer, D.A.G. (1983) - via Taxa Watermanagement the Netherlands (TWN)
Shenkar, N.; Swalla, B. J. (2011). Global Diversity of Ascidiacea. PLoS ONE. 6(6): e20657. - via World Register of Introduced Marine Species (WRiMS)
Shenkar, N.; Swalla, B. J. (2011). Global Diversity of Ascidiacea. PLoS ONE. 6(6): e20657. - via World Register of Marine Species
Hayward, P.J. & Ryland, J.S. (2002) - via Taxa Watermanagement the Netherlands (TWN)
Parker, S.P. (ed). (1982). Synopsis and Classification of Living Organisms. McGraw-Hill, New York. 2 volumes. - via The Interim Register of Marine and Nonmarine Genera
Wells, A., and W. W. K. Houston, eds., 1998: Hemichordata, Tunicata, Cephalochordata. Zoological Catalogue of Australia, vol. 34. xiii + 298. - via Integrated Taxonomic Information System (ITIS)
Ruggiero, M. A.; Gordon, D. P.; Orrell, T. M.; Bailly, N.; Bourgoin, T.; Brusca, R. C.; Cavalier-Smith, T.; Guiry, M. D.; Kirk, P. M. (2015). A higher level classification of all living organisms. PLOS ONE. 10(4): e0119248. - via The Interim Register of Marine and Nonmarine Genera
Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!
 
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