AquaNISInformation system on aquatic non-indigenous and cryptogenic species |
Species | Phallusia mammillata [WoRMS] | |
Authority | (Cuvier, 1815) | |
Family | Ascidiidae | |
Order | Phlebobranchia | |
Class | Ascidiacea | |
Phylum | Chordata | |
Synonym (?) | ||
Sub-species level (?) | Not entered |
Native origin (?) | Not entered Comments: NE Atlantic |
Life form / Life stage (?) |
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Sociability / Life stage (?) |
Comments: P. mammillata is a solitary species of ascidian and can grow to a height of about 20 cm. The tunic is a translucent, bluish-white colour and is covered with irregular rounded lobes or mounds. |
Reproductive frequency (?) | Iteroparous References (not structured): McDougall, A., Lee, K. W. M., Dumollard, R. 2014. Microinjection and 4D fluorescence imaging in the eggs and embryos of the ascidian Phallusia mammillata. Developmental Biology of the Sea Urchin and Other Marine Invertebrates: Methods and Protocols, pp. 175-185. |
Reproductive type (?) | Sexual References: McDougall, A., Lee, K. W. M., Dumollard, R. 2014. Microinjection and 4D fluorescence imaging in the eggs and embryos of the ascidian Phallusia mammillata. Developmental Biology of the Sea Urchin and Other Marine Invertebrates: Methods and Protocols, pp. 175-185. Comments: Each P. mammillata individual is a hermaphrodite. Eggs are released through the exhalent siphon and external fertilization in the water column takes place. The eggs hatch into free-swimming, tadpole-like larvae, which within a few days settle on the seabed and undergo metamorphosis into juveniles. |
Developmental trait (?) | Spawning References: McDougall, A., Lee, K. W. M., Dumollard, R. 2014. Microinjection and 4D fluorescence imaging in the eggs and embryos of the ascidian Phallusia mammillata. Developmental Biology of the Sea Urchin and Other Marine Invertebrates: Methods and Protocols, pp. 175-185. |
Characteristic feeding method / Life stage (?) |
References (not structured): Fiala-Médioni, A. 1978. Filter-feeding ethology of benthic invertebrates (ascidians). IV. Pumping rate, filtration rate, filtration efficiency. Marine Biology, 48, pp. 243-249. Comments: The animal feeds on the planktonic particles that it filters from the incoming seawater by passing it through a mucous net. |
Mobility / Life stage (?) |
References (not structured): Groppelli, S., Pennati, R., Scarì, G., Sotgia, C., De Bernardi, F. 2003. Observations on the settlement of Phallusia mammillata larvae: effects of different lithological substrata. Italian Journal of Zoology, 70(4), pp. 321-326. Comments: This tunicate is found on rocky, sandy or muddy substrates in the northeastern Atlantic Ocean, the North Sea, the English Channel and the Mediterranean Sea to depths of about 200 m. |
Salinity tolerance range (?) | Venice system: 7. Euhaline [30-40psu] References: Arduini, D., Doria, L., Borghese, J., Gravina, M. F., Giangrande, A. 2023. The Ascidian–Amphipod Association between Phallusia mammillata (Cuvier, 1815) and Leucothoe richiardii (Lessona, 1865) in the Mar Grande of Taranto (Mediterranean Sea, Italy). Journal of Marine Science and Engineering, 11(9), 1694. |
Habitat modifying ability potential (?) | Autogenic ecosystem engineers References: Groppelli, S., Pennati, R., Scarì, G., Sotgia, C., De Bernardi, F. 2003. Observations on the settlement of Phallusia mammillata larvae: effects of different lithological substrata. Italian Journal of Zoology, 70(4), pp. 321-326. |
Toxicity / Life stage (?) | Not relevant |
Bioaccumulation association (?) | Anthropogenic chemical compounds References: Ueki, T., Takemoto, K., Fayard, B., Salomé, M., Yamamoto, A., Kihara, H., ... Michibata, H. 2002. Scanning X-ray microscopy of living and freeze-dried blood cells in two vanadium-rich ascidian species, Phallusia mammillata and Ascidia sydneiensis samea. Zoological science, 19(1), pp. 27-35. Comments: P. mammillata is one of a small number of ascidians that accumulate the element vanadium in their blood cells. |
Known human health impact? | Not known Comments: Not available. |
Known economic impact? | Not known Comments: Not available. |
Known measurable environmental impact? | Not known Comments: Not available. |
Included in the Target Species list? | No References: HELCOM, 2009. Alien Species and Ballast Water [PDF] Available at: https://archive.iwlearn.net/helcom.fi/stc/files/shipping/Table_2_Alienspecies_%20lists_2009.pdf [Accessed 1 July 2024]. |
Association with vessel vectors (?) | Unknown References: Arduini, D., Doria, L., Borghese, J., Gravina, M. F., Giangrande, A. 2023. The Ascidian–Amphipod Association between Phallusia mammillata (Cuvier, 1815) and Leucothoe richiardii (Lessona, 1865) in the Mar Grande of Taranto (Mediterranean Sea, Italy). Journal of Marine Science and Engineering, 11(9), 1694. Comments: Possible via biofouling. |
Last update by | Sandra Gečaitė, 2024-08-19 |