Meridiastra mortenseni
| Patiriella mortenseni | |
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| Species: | P. mortenseni
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| Binomial name | |
| Patiriella mortenseni O'Loughlin, Waters & Roy, 2002
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Patiriella mortenseni is a sea star of the family Asterinidae endemic to New Zealand. Discovered as a new species in 2002,[1] it is named after T. Mortensen, who recorded it as distinct from Patiriella regularis, the New Zealand common cushion star, in 1925.[2]
Reciprocal transplant experiments in Fiordland have shown it is less tolerant of hyposaline conditions than close relative P. regularis. This is reflected in its distribution: it lives in deeper waters (at depths of roughly 10±3 m in Milford and Doubtful Sounds), below the low salinity layer.[3] In laboratory conditions, they die after 24-hour exposure to water with salinities below 25‰.[3]
References
- ^ O'Loughlin, P.M., Waters, J.M., Roy, M.S., 2002. Description of a new species of Patiriella from New Zealand, and review of Patiriella regularis (Echinodermata, Asteroidea) based on morphological and molecular data. Journal of the Royal Society of New Zealand 32, 697–711.
- ^ Mortensen, T. 1925: Echinoderms of New Zealand and the Auckland-Campbell Islands. III-V. Asteroidea, Holothurioidea, Crinoidea. Videnskabelige Meddelelser fra Dansk naturhistorisk Forening i København 79. Pp. 261–420.
- ^ a b Barker, M.F.; M.P. Russell. (2008). "The distribution and behaviour of Patiriella mortenseni and P. regularis in the extreme hyposaline conditions of the southern New Zealand fiords". Journal of Experimental Marine Biology and Ecology. 355: 76–84. doi:10.1016/j.jembe.2007.12.001.
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