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AquaNISInformation system on aquatic non-indigenous and cryptogenic species |
| Species | Microcosmus squamiger | |
| Date of the first record (?) | 1971 References (not structured): Monniot C (1981) Apparition de l'ascidie Microcosmus exasperatus dans les ports Méditerranéens. Tethys 10(1): 59-61 |
| Recipient region (?) | Country: Italy LME: 26. Mediterranean Sea LME sub-region: Western Mediterranean References: Virgili, R., Tanduo, V., Katsanevakis, S., Terlizzi, F., Villani, G., Fontana, A., & Crocetta, F. (2022). The Miseno Lake (central-western Mediterranean Sea): an overlooked reservoir of non-indigenous and cryptogenic ascidians in a marine reserve. Frontiers in Marine Science, 9, 866906. References (not structured): Monniot C (1981) Apparition de l'ascidie Microcosmus exasperatus dans les ports Méditerranéens. Tethys 10(1): 59-61 Comments: mentioned as Microcosmus exasperatus |
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| Source region (?) | Unknown |
| Pathway / Vector (?) | Level of certainty: Possible Pathway: Natural spread from neighboring countries Vector: Water currents Pathway: Vessels Vector: Ballast water Vector: Ship’s hull References (not structured): Godwin, 2003 fide Mastrototaro F., Dappiano M. (2005). New record of the non indigenous species Microcosmus squamiger Michaelsen, 1927 (Ascidiacea, Stolidobranchia) in the harbour of Salerno (Tyrrhenian Sea, Italy). JMBA2 Journal of the Marine Biological Association of the United Kingdom – Biodiversity Records. Published online. Lambert CC, & Lambert G, (1998). Non-indigenous ascidians in southern California harbours and marinas. Marine Biology. 130:675-688 Comments: Fouling species, passive dispersal (Godwin, 2003); ballast waters (Lambert & Lambert, 1998) |
| Habitat type (?) | Estuary Lagoon Port vicinity Ports References: Virgili, R., Tanduo, V., Katsanevakis, S., Terlizzi, F., Villani, G., Fontana, A., & Crocetta, F. (2022). The Miseno Lake (central-western Mediterranean Sea): an overlooked reservoir of non-indigenous and cryptogenic ascidians in a marine reserve. Frontiers in Marine Science, 9, 866906. References (not structured): Monniot C (1981) Apparition de l'ascidie Microcosmus exasperatus dans les ports Méditerranéens. Tethys 10(1): 59-61 Mastrototaro F., Dappiano M. (2005). New record of the non indigenous species Microcosmus squamiger Michaelsen, 1927 (Ascidiacea, Stolidobranchia) in the harbour of Salerno (Tyrrhenian Sea, Italy). JMBA2 Journal of the Marine Biological Association of the United Kingdom – Biodiversity Records. Published online. Mastrototaro F, Petrocelli A, Cecere E, Matarrese A, (2004). Non indigenous species settle down in the Taranto Seas. Biogeographia. XXV: 47-54 Comments: Ports of Genua (Monniot, 1981) and Salerno (Mastrototaro & Dappiano, 2005), Savona, Imperia, Magra river mouth (Ligurian sea). Miseno lake, near Naples Typical in harbours and bays. |
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| Wave exposure (?) | Not entered | |
| Salinity range (?) | Not entered | |
| Temperature range (?) | Not entered |
| Zonation / Substratum (?) | Benthic: Sublittoral within photic zone References (not structured): Mastrototaro F, Petrocelli A, Cecere E, Matarrese A, (2004). Non indigenous species settle down in the Taranto Seas. Biogeographia. XXV: 47-54 |
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| Reproductive duration (?) | Not entered | |
| Reproductive seasonality (?) | Not entered | |
| Migration pattern (?) | Not entered |
| Population status (?) | Established (Low level of certainty) References (not structured): Monniot C (1981) Apparition de l'ascidie Microcosmus exasperatus dans les ports Méditerranéens. Tethys 10(1): 59-61 Mastrototaro F., Dappiano M. (2005). New record of the non indigenous species Microcosmus squamiger Michaelsen, 1927 (Ascidiacea, Stolidobranchia) in the harbour of Salerno (Tyrrhenian Sea, Italy). JMBA2 Journal of the Marine Biological Association of the United Kingdom – Biodiversity Records. Published online. Comments: Two records in different areas and different years (1971 and 2000) |
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| Species status (?) | Non-indigenous species |
| Ports | Port: Genova Population status: Not entered |
| Created by | Anna Occhipinti |
| Last update by | Agnese Marchini, 2026-05-17 |