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Botryllus schlosseri
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Subphylum: Tunicata
Class: Ascidiacea
Order: Pleurogona

Pleurogona is an order of tunicates which is no longer in use as it contains the same families as Stolidobranchia. [1]

One of the more invasive species of this order is the "stalked (or leathery or solitary) sea squirt" Styela clava .[2][3][4] Another invasive genus include the "chain sea squirts or chain tunicates" of the genus Botrylloides [5][6] and the "golden star tunicate" Botryllus schlosseri .[7]


  1. ^ Gittenberger, A.; Sanamyan, K. (2015). Pleurogona. In: Shenkar, N.; Gittenberger, A.; Lambert, G.; Rius, M.; Moreira Da Rocha, R.; Swalla, B.J.; Turon, X. (2015) Ascidiacea World Database. Accessed through: World Register of Marine Species on 2015-12-23
  2. ^ "Leathery sea squirt Styela clava Herdman, 1881". CSIRO. 2006-12-07. 
  3. ^ "Asian stalked sea squirt, Pacific rough sea squirt (Styela clava)". University of Rhode Island. 
  4. ^ "Invasive sea squirt (Styela clava) fact sheet". NIWA Science. 
  5. ^ M.J. de Kluijver & S.S. Ingalsuo. "Macrobenthos of the North Sea: Botrylloides leachi". University of Amsterdam. 
  6. ^ Andrew N. Cohen (2005-06-07). "Guide to the Exotic Species of San Francisco Bay: Botrylloides violaceus Oka, 1927". San Francisco Estuary Institute. 
  7. ^ M.J. de Kluijver & S.S. Ingalsuo. "Macrobenthos of the North Sea: Botrylloides schlosseri". University of Amsterdam.