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AquaNISInformation system on aquatic non-indigenous and cryptogenic species |
| Species | Microcosmus squamiger [WoRMS] | |
| Authority | Michaelsen, 1927 | |
| Family | Pyuridae | |
| Order | Stolidobranchia | |
| Class | Ascidiacea | |
| Phylum | Chordata | |
| Synonym (?) | Comments: It has been frequently misidentified with M. exasperatus (Monniot, 1981) |
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| Sub-species level (?) | Not entered |
| Native origin (?) | Country: Australia --> LME: 40. Northeast Australian Shelf - Great Barrier Reef --> LME: 41. East-Central Australian Shelf --> LME: 42. Southeast Australian Shelf --> LME: 43. Southwest Australian Shelf --> LME: 44. West-Central Australian Shelf --> LME: 45. Northwest Australian Shelf References (not structured): Monniot C., Monniot F., Griffiths C. & Schleyer M. (2001) South African ascidians. Annals of the South African Museum, 108, 1–141 |
| Life form / Life stage (?) |
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| Sociability / Life stage (?) |
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| Reproductive frequency (?) | Iteroparous |
| Reproductive type (?) | Sexual References: Mastrototaro F, Dappiano M (2005) New record of the non-indigenous species Microcosmus squamiger (Ascidiacea: Stolidobranchia) in the harbour of Salerno (Tyrrhenian Sea, Italy). JMBA2 - Biodiversity Records. Published online |
| Developmental trait (?) | Lecithotrophy References: Mastrototaro F, Dappiano M (2005) New record of the non-indigenous species Microcosmus squamiger (Ascidiacea: Stolidobranchia) in the harbour of Salerno (Tyrrhenian Sea, Italy). JMBA2 - Biodiversity Records. Published online Comments: The non-feeding planktonic larvae have a rapid settlement, metamorphosis and growth |
| Characteristic feeding method / Life stage (?) |
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| Mobility / Life stage (?) |
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| Salinity tolerance range (?) | Venice system: 6. Polymixohaline [18-30psu] References: Lowe AJ, 2002. M. squamiger; a solitary ascidian introduced to southern California harbors and marinas: salinity tolerance and phylogenetic analysis. Fullerton, California, USA: California State Univ |
| Habitat modifying ability potential (?) | OLD VALUE References: Rius M, Turon X, Pascual M (2008) Isolation of polymorphic microsatellite loci for the marine invader Microcosmus squamiger (Ascidiacea). Molecular Ecology Resources 8: 1405–1407 Comments: --/OLD VALUE/-- Ecosystem engineer (Anna) It has become a pest in some littoral communities within its introduced range. |
| Toxicity / Life stage (?) | Unknown Comments: Not available. |
| Bioaccumulation association (?) | Unknown Comments: Not available. |
| Known human health impact? | Not known Comments: Not available. |
| Known economic impact? | Known References: Rius, M., Pineda, M. C., & Turon, X. (2008). Population dynamics and life cycle of the introduced ascidian Microcosmus squamiger in the Mediterranean Sea. Biological Invasions, 11(10), 2181–2194. doi:10.1007/s10530-008-9375-2 Mastrototaro, F., & Dappiano, M. (2008). New record of the non-indigenous species Microcosmus squamiger (Ascidiacea: Stolidobranchia) in the harbour of Salerno (Tyrrhenian Sea, Italy). Marine Biodiversity Records, 1. doi:10.1017/s1755267205001247 Comments: Has been found in high abundance in oyster farms, where it poses an economic threat (Rodriguez and IbarraObando, 2008) (Rius et al., 2008). |
| Known measurable environmental impact? | Known References: Rius, M., Pineda, M. C., & Turon, X. (2008). Population dynamics and life cycle of the introduced ascidian Microcosmus squamiger in the Mediterranean Sea. Biological Invasions, 11(10), 2181–2194. doi:10.1007/s10530-008-9375-2 Mastrototaro, F., & Dappiano, M. (2008). New record of the non-indigenous species Microcosmus squamiger (Ascidiacea: Stolidobranchia) in the harbour of Salerno (Tyrrhenian Sea, Italy). Marine Biodiversity Records, 1. doi:10.1017/s1755267205001247 Comments: Decline of other species, while M. squamiger has increased its abundance; can alter native biota (Rius et al, 2008). |
| Included in the Target Species list? | Yes Comments: Assessed by the COMPLETE project experts (2021), included in target species list. |
| Association with vessel vectors (?) | Ballast waters Biofouling References: Mastrototaro F, Dappiano M (2005) New record of the non-indigenous species Microcosmus squamiger (Ascidiacea: Stolidobranchia) in the harbour of Salerno (Tyrrhenian Sea, Italy). JMBA2 - Biodiversity Records. Published online |
| Last update by | Monika Pelėdienė, 2022-01-19 |